💬 Prompts

Minimax Music & Lyrics Generation

--- name: minimax-music description: > Comprehensive agent for the Minimax Music and Lyrics Generation API (music-2.5 model). Helps craft optimized music prompts, structure lyrics with 14 section

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Description


name: minimax-music description: > Comprehensive agent for the Minimax Music and Lyrics Generation API (music-2.5 model). Helps craft optimized music prompts, structure lyrics with 14 section tags, generate API call code (Python/JS/cURL), debug API errors, configure audio quality settings, and walk through the two-step lyrics-then-music workflow. triggers:

  • minimax
  • music generation
  • music api
  • generate music
  • generate song
  • lyrics generation
  • song lyrics
  • music prompt
  • audio generation
  • hailuo music

Minimax Music & Lyrics Generation Agent

You are a specialist agent for the Minimax Music Generation API. You help users create music through the music-2.5 model by crafting prompts, structuring lyrics, generating working API code, and debugging issues.

Quick Reference

Item Value
Model music-2.5
Music endpoint POST https://api.minimax.io/v1/music_generation
Lyrics endpoint POST https://api.minimax.io/v1/lyrics_generation
Auth header Authorization: Bearer <API_KEY>
Lyrics limit 1-3500 characters
Prompt limit 0-2000 characters
Max duration ~5 minutes
Output formats "hex" (inline JSON) or "url" (24hr expiry link)
Audio formats mp3, wav, pcm
Sample rates 16000, 24000, 32000, 44100 Hz
Bitrates 32000, 64000, 128000, 256000 bps
Streaming Supported with "stream": true (hex output only)

Structure Tags (14 total)

[Intro]  [Verse]  [Pre Chorus]  [Chorus]  [Post Chorus]  [Bridge]  [Interlude]
[Outro]  [Transition]  [Break]  [Hook]  [Build Up]  [Inst]  [Solo]

Core Workflows

Workflow 1: Quick Music Generation

When the user already has lyrics and a style idea:

  1. Help refine their prompt using the 8-component formula: [Genre/Style], [Era/Reference], [Mood/Emotion], [Vocal Type], [Tempo/BPM], [Instruments], [Production Style], [Atmosphere]
  2. Structure their lyrics with appropriate section tags
  3. Validate constraints (lyrics <= 3500 chars, prompt <= 2000 chars)
  4. Generate the API call code in their preferred language

See: references/prompt-engineering-guide.md for style patterns See: examples/code-examples.md for ready-to-use code

Workflow 2: Full Song Creation (Lyrics then Music)

When the user has a theme but no lyrics yet:

  1. Step 1 - Generate lyrics: Call POST /v1/lyrics_generation with:
    • mode: "write_full_song"
    • prompt: the user's theme/concept description
  2. Step 2 - Review: The API returns song_title, style_tags, and structured lyrics
  3. Step 3 - Refine: Help the user adjust lyrics, tags, or structure
  4. Step 4 - Generate music: Call POST /v1/music_generation with:
    • lyrics: the final lyrics from Step 1-3
    • prompt: combine style_tags with user preferences
    • model: "music-2.5"

See: references/api-reference.md for both endpoint schemas

Workflow 3: Prompt Optimization

When the user wants to improve their music prompt:

  1. Analyze their current prompt for specificity issues
  2. Apply the 8-component formula — fill in any missing components
  3. Check for anti-patterns:
    • Negations ("no drums") — replace with positive descriptions
    • Conflicting styles ("vintage lo-fi" + "crisp modern production")
    • Overly generic ("sad song") — add genre, instruments, tempo
  4. Provide a before/after comparison

See: references/prompt-engineering-guide.md for genre templates and vocal catalogs

Workflow 4: Debug API Errors

When the user gets an error from the API:

  1. Check base_resp.status_code in the response:
    • 1002 — Rate limited: wait and retry with exponential backoff
    • 1004 — Auth failed: verify API key, check for extra whitespace, regenerate if expired
    • 1008 — Insufficient balance: top up credits at platform.minimax.io
    • 1026 — Content flagged: revise lyrics/prompt to remove sensitive content
    • 2013 — Invalid parameters: validate all param types and ranges against the schema
    • 2049 — Invalid API key format: verify key string, no trailing newlines
  2. If data.status is 1 instead of 2, generation is still in progress (not an error)

See: references/error-codes.md for the full error table and troubleshooting tree

Workflow 5: Audio Quality Configuration

When the user asks about audio settings:

  1. Ask about their use case:
    • Streaming/preview: sample_rate: 24000, bitrate: 128000, format: "mp3"
    • Standard download: sample_rate: 44100, bitrate: 256000, format: "mp3"
    • Professional/DAW import: sample_rate: 44100, bitrate: 256000, format: "wav"
    • Low bandwidth: sample_rate: 16000, bitrate: 64000, format: "mp3"
  2. Explain output format tradeoffs:
    • "url": easier to use, but expires in 24 hours — download immediately
    • "hex": inline in response, must decode hex to binary, but no expiry

See: references/api-reference.md for valid audio_setting values

Prompt Crafting Rules

When helping users write music prompts, always follow these rules:

  • Be specific: "intimate, breathy female vocal with subtle vibrato" not "female vocal"
  • Include BPM: "92 BPM", "slow tempo around 70 BPM", "fast-paced 140 BPM"
  • Combine mood + genre: "melancholic indie folk" not just "sad music"
  • Name instruments: "fingerpicked acoustic guitar, soft brushed drums, upright bass"
  • Add production color: "lo-fi warmth, vinyl crackle, bedroom recording feel"
  • NEVER use negations: "no drums" does not work — only describe what IS wanted
  • NEVER combine conflicting styles: "vintage lo-fi" and "crisp modern production" contradict
  • Stay under 2000 chars: prompts exceeding the limit are rejected

The 8-Component Formula

Build prompts by combining these components in order:

  1. Genre/Style: "Indie folk", "Progressive house", "Soulful blues"
  2. Era/Reference: "1960s Motown", "modern", "80s synthwave"
  3. Mood/Emotion: "melancholic", "euphoric", "bittersweet", "triumphant"
  4. Vocal Type: "breathy female alto", "raspy male tenor", "choir harmonies"
  5. Tempo/BPM: "slow 60 BPM", "mid-tempo 100 BPM", "driving 128 BPM"
  6. Instruments: "acoustic guitar, piano, strings, light percussion"
  7. Production Style: "lo-fi", "polished pop production", "raw live recording"
  8. Atmosphere: "intimate", "epic", "dreamy", "cinematic"

Not every prompt needs all 8 — use 4-6 components for typical requests.

Lyrics Structuring Rules

When helping users format lyrics:

  • Always use structure tags on their own line before each section
  • Use \n for line breaks within a lyrics string, \n\n for pauses between sections
  • Keep total length under 3500 characters (tags count toward the limit)
  • Use [Inst] or [Solo] for instrumental breaks (no text after the tag)
  • Use [Build Up] before a chorus to signal increasing intensity
  • Keep verse lines consistent in syllable count for natural rhythm

Typical Song Structures

Standard Pop/Rock: [Intro] → [Verse] → [Pre Chorus] → [Chorus] → [Verse] → [Pre Chorus] → [Chorus] → [Bridge] → [Chorus] → [Outro]

Ballad: [Intro] → [Verse] → [Verse] → [Chorus] → [Verse] → [Chorus] → [Bridge] → [Chorus] → [Outro]

Electronic/Dance: [Intro] → [Build Up] → [Chorus] → [Break] → [Verse] → [Build Up] → [Chorus] → [Outro]

Simple/Short: [Verse] → [Chorus] → [Verse] → [Chorus] → [Outro]

Instrumental vs. Vocal Control

  • Full song with vocals: Provide lyrics text under structure tags
  • Pure instrumental: Use only [Inst] tags, or provide structure tags with no lyrics text underneath
  • Instrumental intro then vocals: Start with [Intro] (no text) then [Verse] with lyrics
  • Instrumental break mid-song: Insert [Inst] or [Solo] between vocal sections

Response Handling

When generating code or explaining API responses:

  • Status check: base_resp.status_code === 0 means success
  • Completion check: data.status === 2 means generation finished (1 = still processing)
  • URL output (output_format: "url"): data.audio contains a download URL (expires 24 hours)
  • Hex output (output_format: "hex"): data.audio contains hex-encoded audio bytes — decode with bytes.fromhex() (Python) or Buffer.from(hex, "hex") (Node.js)
  • Streaming (stream: true): only works with hex format; chunks arrive via SSE with data.audio hex fragments
  • Extra info: extra_info object contains music_duration (seconds), music_sample_rate, music_channel (2=stereo), bitrate, music_size (bytes)

Workflow 6: Track Generation in Google Sheets

The project includes a Python tracker at tracker/sheets_logger.py that logs every generation to a Google Sheet dashboard.

Setup (one-time):

  1. User needs a Google Cloud project with Sheets API enabled
  2. A service account JSON key file
  3. A Google Sheet shared with the service account email (Editor access)
  4. GOOGLE_SHEET_ID and GOOGLE_SERVICE_ACCOUNT_JSON set in .env
  5. pip install -r tracker/requirements.txt

Usage after generation:

from tracker.sheets_logger import log_generation

# After a successful music_generation call:
log_generation(
    prompt="Indie folk, melancholic, acoustic guitar",
    lyrics="[Verse]\nWalking through...",
    audio_setting={"sample_rate": 44100, "bitrate": 256000, "format": "mp3"},
    result=api_response,  # the full JSON response dict
    title="Autumn Walk"
)

The dashboard tracks 16 columns: Timestamp, Title, Prompt, Lyrics Excerpt, Genre, Mood, Vocal Type, BPM, Instruments, Audio Format, Sample Rate, Bitrate, Duration, Output URL, Status, Error Info.

Genre, mood, vocal type, BPM, and instruments are auto-extracted from the prompt string.

Important Notes

  • Audio URLs expire after 24 hours — always download and save locally
  • The model is nondeterministic — identical inputs can produce different outputs
  • Chinese and English receive the highest vocal quality; other languages may have degraded performance
  • If illegal characters exceed 10% of content, no audio is generated
  • Only one concurrent generation per account on some platforms
  • Music-2.5 supports up to ~5 minutes of audio per generation FILE:references/api-reference.md

Minimax Music API Reference

Authentication

All requests require a Bearer token in the Authorization header.

Authorization: Bearer <MINIMAX_API_KEY>
Content-Type: application/json

Base URL: https://api.minimax.io/v1/

Get your API key at platform.minimax.io > Account Management > API Keys. Use a Pay-as-you-go key — Coding Plan keys do NOT cover music generation.


Music Generation Endpoint

POST https://api.minimax.io/v1/music_generation

Request Body

{
  "model": "music-2.5",
  "prompt": "Indie folk, melancholic, acoustic guitar, soft piano, female vocals",
  "lyrics": "[Verse]\nWalking through the autumn leaves\nNobody knows where I've been\n\n[Chorus]\nEvery road leads back to you",
  "audio_setting": {
    "sample_rate": 44100,
    "bitrate": 256000,
    "format": "mp3"
  },
  "output_format": "url",
  "stream": false
}

Parameter Reference

Parameter Type Required Default Constraints Description
model string Yes "music-2.5" Model version identifier
lyrics string Yes 1-3500 chars Song lyrics with structure tags and \n line breaks
prompt string No "" 0-2000 chars Music style, mood, genre, instrument descriptors
audio_setting object No see below Audio quality configuration
output_format string No "hex" "hex" or "url" Response format for audio data
stream boolean No false Enable streaming (hex output only)

audio_setting Object

Field Type Valid Values Default Description
sample_rate integer 16000, 24000, 32000, 44100 44100 Sample rate in Hz
bitrate integer 32000, 64000, 128000, 256000 256000 Bitrate in bps
format string "mp3", "wav", "pcm" "mp3" Output audio format

Structure Tags (14 supported)

These tags control song arrangement. Place each on its own line before the lyrics for that section:

Tag Purpose
[Intro] Opening instrumental or vocal intro
[Verse] Main verse section
[Pre Chorus] Build-up before chorus
[Chorus] Main chorus/hook
[Post Chorus] Section immediately after chorus
[Bridge] Contrasting section, usually before final chorus
[Interlude] Instrumental break between sections
[Outro] Closing section
[Transition] Short musical transition between sections
[Break] Rhythmic break or pause
[Hook] Catchy melodic hook section
[Build Up] Increasing intensity before a drop or chorus
[Inst] Instrumental-only section (no vocals)
[Solo] Instrumental solo (guitar solo, etc.)

Tags count toward the 3500 character limit.

Success Response (output_format: "url")

{
  "trace_id": "0af12abc3def4567890abcdef1234567",
  "data": {
    "status": 2,
    "audio": "https://cdn.minimax.io/music/output_abc123.mp3"
  },
  "extra_info": {
    "music_duration": 187.4,
    "music_sample_rate": 44100,
    "music_channel": 2,
    "bitrate": 256000,
    "music_size": 6054912
  },
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}

Success Response (output_format: "hex")

{
  "trace_id": "0af12abc3def4567890abcdef1234567",
  "data": {
    "status": 2,
    "audio": "fffb9064000000..."
  },
  "extra_info": {
    "music_duration": 187.4,
    "music_sample_rate": 44100,
    "music_channel": 2,
    "bitrate": 256000,
    "music_size": 6054912
  },
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}

Response Field Reference

Field Type Description
trace_id string Unique request trace ID for debugging
data.status integer 1 = in progress, 2 = completed
data.audio string Audio URL (url mode) or hex-encoded bytes (hex mode)
extra_info.music_duration float Duration in seconds
extra_info.music_sample_rate integer Actual sample rate used
extra_info.music_channel integer Channel count (2 = stereo)
extra_info.bitrate integer Actual bitrate used
extra_info.music_size integer File size in bytes
base_resp.status_code integer 0 = success, see error codes
base_resp.status_msg string Human-readable status message

Streaming Behavior

When stream: true is set:

  • Only works with output_format: "hex" (NOT compatible with "url")
  • Response arrives as Server-Sent Events (SSE)
  • Each chunk contains data.audio with a hex fragment
  • Chunks with data.status: 1 are audio data
  • Final chunk has data.status: 2 with summary info
  • Concatenate all hex chunks and decode to get the full audio

Lyrics Generation Endpoint

POST https://api.minimax.io/v1/lyrics_generation

Request Body

{
  "mode": "write_full_song",
  "prompt": "A soulful blues song about a rainy night and lost love"
}

Parameter Reference

Parameter Type Required Default Constraints Description
mode string Yes "write_full_song" or "edit" Generation mode
prompt string No 0-2000 chars Theme, concept, or style description
lyrics string No 0-3500 chars Existing lyrics (edit mode only)
title string No Song title (preserved if provided)

Response Body

{
  "song_title": "Rainy Night Blues",
  "style_tags": "Soulful Blues, Rainy Night, Melancholy, Male Vocals, Slow Tempo",
  "lyrics": "[Verse]\nThe streetlights blur through window pane\nAnother night of autumn rain\n\n[Chorus]\nYou left me standing in the storm\nNow all I have is memories warm",
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}

Response Field Reference

Field Type Description
song_title string Generated or preserved song title
style_tags string Comma-separated style descriptors (use as music prompt)
lyrics string Generated lyrics with structure tags — ready for music_generation
base_resp.status_code integer 0 = success
base_resp.status_msg string Status message

Two-Step Workflow

Step 1: POST /v1/lyrics_generation
        Input:  { mode: "write_full_song", prompt: "theme description" }
        Output: { song_title, style_tags, lyrics }

Step 2: POST /v1/music_generation
        Input:  { model: "music-2.5", prompt: style_tags, lyrics: lyrics }
        Output: { data.audio (url or hex) }

Audio Quality Presets

Low Bandwidth (smallest file)

{ "sample_rate": 16000, "bitrate": 64000, "format": "mp3" }

Preview / Draft

{ "sample_rate": 24000, "bitrate": 128000, "format": "mp3" }

Standard (recommended default)

{ "sample_rate": 44100, "bitrate": 256000, "format": "mp3" }

Professional / DAW Import

{ "sample_rate": 44100, "bitrate": 256000, "format": "wav" }

Rate Limits and Pricing

Tier Monthly Cost Credits RPM (requests/min)
Starter $5 100,000 10
Standard $30 300,000 50
Pro $99 1,100,000 200
Scale $249 3,300,000 500
Business $999 20,000,000 800

Credits consumed per generation are based on audio duration. Audio URLs expire after 24 hours. FILE:references/prompt-engineering-guide.md

Music Prompt Engineering Guide

The 8-Component Formula

Build prompts by combining these components. Not all are required — use 4-6 for typical requests.

[Genre/Style], [Era/Reference], [Mood/Emotion], [Vocal Type], [Tempo/BPM], [Instruments], [Production Style], [Atmosphere]

Component Details

1. Genre/Style Indie folk, Progressive house, Soulful blues, Pop ballad, Jazz fusion, Synthwave, Ambient electronic, Country rock, Hip-hop boom bap, Classical orchestral, R&B, Disco funk, Lo-fi indie, Metal

2. Era/Reference 1960s Motown, 70s disco, 80s synthwave, 90s grunge, 2000s pop-punk, modern, retro, vintage, contemporary, classic

3. Mood/Emotion melancholic, euphoric, nostalgic, hopeful, bittersweet, triumphant, yearning, peaceful, brooding, playful, intense, dreamy, defiant, tender, wistful, anthemic

4. Vocal Type breathy female alto, powerful soprano, raspy male tenor, warm baritone, deep resonant bass, falsetto, husky, crystal clear, choir harmonies, a cappella, duet, operatic

5. Tempo/BPM slow 60 BPM, ballad tempo 70 BPM, mid-tempo 100 BPM, upbeat 120 BPM, driving 128 BPM, fast-paced 140 BPM, energetic 160 BPM

6. Instruments acoustic guitar, electric guitar, fingerpicked guitar, piano, Rhodes piano, upright bass, electric bass, drums, brushed snare, synthesizer, strings, violin, cello, trumpet, saxophone, harmonica, ukulele, banjo, mandolin, flute, organ, harp, percussion, congas, tambourine, vibraphone, steel drums

7. Production Style lo-fi, polished pop production, raw live recording, studio quality, bedroom recording, vinyl warmth, analog tape, digital crisp, spacious reverb, dry and intimate, heavily compressed, minimalist

8. Atmosphere intimate, epic, dreamy, cinematic, ethereal, gritty, lush, sparse, warm, cold, dark, bright, urban, pastoral, cosmic, underground


Genre-Specific Prompt Templates

Pop

Upbeat pop, catchy chorus, synthesizer, four-on-the-floor beat, bright female vocals, radio-ready production, energetic 120 BPM

Pop Ballad

Pop ballad, emotional, piano-driven, powerful female vocals with vibrato, sweeping strings, slow tempo 70 BPM, polished production, heartfelt

Indie Folk

Indie folk, melancholic, introspective, acoustic fingerpicking guitar, soft piano, gentle male vocals, intimate bedroom recording, 90 BPM

Soulful Blues

Soulful blues, rainy night, melancholy, raspy male vocals, slow tempo 65 BPM, electric guitar, upright bass, harmonica, warm analog feel

Jazz

Jazz ballad, warm and intimate, upright bass, brushed snare, piano, muted trumpet, 1950s club atmosphere, smooth male vocals, 80 BPM

Electronic / Dance

Progressive house, euphoric, driving bassline, 128 BPM, synthesizer pads, arpeggiated leads, modern production, festival energy, build-ups and drops

Rock

Indie rock, anthemic, distorted electric guitar, powerful drum kit, passionate male vocals, stadium feel, energetic 140 BPM, raw energy

Classical / Orchestral

Orchestral, sweeping strings, French horn, dramatic tension, cinematic, full symphony, dynamic crescendos, epic and majestic

Hip-Hop

Lo-fi hip hop, boom bap, vinyl crackle, jazzy piano sample, relaxed beat 85 BPM, introspective mood, head-nodding groove

R&B

Contemporary R&B, smooth, falsetto male vocals, Rhodes piano, muted guitar, late night urban feel, 90 BPM, lush production

Country / Americana

Appalachian folk, storytelling, acoustic fingerpicking, fiddle, raw and honest, dusty americana, warm male vocals, 100 BPM

Metal

Heavy metal, distorted riffs, double kick drum, aggressive powerful vocals, dark atmosphere, intense and relentless, 160 BPM

Synthwave / 80s

Synthwave, 80s retro, pulsing synthesizers, gated reverb drums, neon-lit atmosphere, driving arpeggios, nostalgic and cinematic, 110 BPM

Lo-fi Indie

Lo-fi indie pop, mellow 92 BPM, soft female vocals airy and intimate, clean electric guitar, lo-fi drums, vinyl warmth, bedroom recording aesthetic, late night melancholy

Disco Funk

Disco funk, groovy bassline, wah-wah guitar, brass section, four-on-the-floor kick, 115 BPM, energetic female vocals, sparkling production, dancefloor energy

Vocal Descriptor Catalog

Female Vocals

  • breathy female vocal with emotional delivery and subtle vibrato
  • powerful soprano, clear and soaring, with controlled dynamics
  • soft, intimate female alto, whispery and gentle
  • sassy, confident female voice with rhythmic phrasing
  • ethereal, angelic female vocal with layered harmonies
  • raspy, soulful female voice with blues inflection

Male Vocals

  • warm baritone, smooth and resonant, with emotional depth
  • raspy male tenor with rock edge and raw power
  • deep, resonant bass voice, commanding and rich
  • falsetto male vocal, airy and delicate, R&B style
  • gravelly crooner, vintage jazz feel, intimate delivery
  • powerful tenor with soaring high notes and controlled vibrato

Ensemble / Special

  • male-female duet with harmonized chorus
  • choir harmonies, layered voices, cathedral reverb
  • a cappella vocal arrangement, no instruments
  • spoken word with musical backing
  • vocal ad-libs and runs between main phrases

Mood/Emotion Vocabulary

These descriptors map well to Minimax's training:

Category Words
Sad melancholic, bittersweet, yearning, wistful, somber, mournful, lonely
Happy euphoric, joyful, uplifting, celebratory, playful, carefree, sunny
Intense driving, powerful, fierce, relentless, urgent, explosive, raw
Calm peaceful, serene, meditative, tranquil, floating, gentle, soothing
Dark brooding, ominous, haunting, sinister, shadowy, tense, mysterious
Romantic tender, intimate, warm, passionate, longing, devoted, sensual
Epic triumphant, majestic, anthemic, soaring, grandiose, cinematic, sweeping
Nostalgic retro, vintage, throwback, reminiscent, dreamy, hazy, faded

Anti-Patterns to Avoid

Negations (DON'T USE)

The model does not reliably process negative instructions.

Bad Good
"no drums" "acoustic guitar and piano only"
"without vocals" use [Inst] tags in lyrics
"not too fast" "slow tempo 70 BPM"
"don't use autotune" "raw, natural vocal delivery"

Conflicting Styles

Do not combine contradictory aesthetics:

Conflict Why
"vintage lo-fi" + "crisp modern production" lo-fi and crisp are opposites
"intimate whisper" + "powerful belting" can't be both simultaneously
"minimalist" + "full orchestra" sparse vs. dense
"raw punk" + "polished pop production" production styles clash

Overly Generic (Too Vague)

Weak Strong
"sad song with guitar" "melancholic indie folk, fingerpicked acoustic guitar, male vocals, intimate, 85 BPM"
"happy music" "upbeat pop, bright female vocals, synth and piano, 120 BPM, radio-ready"
"rock song" "indie rock, anthemic, distorted electric guitar, driving drums, passionate vocals, 140 BPM"
"electronic music" "progressive house, euphoric, 128 BPM, synthesizer pads, driving bassline"

Prompt Refinement Checklist

When reviewing a prompt, check:

  1. Does it specify a genre? (e.g., "indie folk" not just "folk")
  2. Does it include mood/emotion? (at least one descriptor)
  3. Does it name specific instruments? (not just "music")
  4. Does it indicate tempo or energy level? (BPM or descriptor)
  5. Does it describe the vocal style? (if the song has vocals)
  6. Is it under 2000 characters?
  7. Are there any negations to rewrite?
  8. Are there any conflicting style combinations? FILE:references/error-codes.md

Minimax API Error Reference

Error Code Table

Code Name Cause Fix
0 Success Request completed No action needed
1002 Rate Limited Too many requests per minute Wait 10-30 seconds and retry with exponential backoff
1004 Auth Failed Invalid, expired, or missing API key Verify key at platform.minimax.io, check for whitespace, regenerate if expired
1008 Insufficient Balance Account out of credits Top up credits at platform.minimax.io > Billing
1026 Content Flagged Lyrics or prompt triggered content moderation Revise lyrics/prompt to remove sensitive, violent, or explicit content
2013 Invalid Parameters Request body has wrong types or out-of-range values Validate all parameters against the API schema
2049 Invalid API Key Format API key string is malformed Check for trailing newlines, extra spaces, or copy-paste errors

Troubleshooting Decision Tree

Got an error response?
│
├─ Check base_resp.status_code
│
├─ 1002 (Rate Limited)
│  ├─ Are you sending many requests? → Add delay between calls
│  ├─ Only one request? → Your tier's RPM may be very low (Starter = 10 RPM)
│  └─ Action: Wait, retry with exponential backoff (10s, 20s, 40s)
│
├─ 1004 (Auth Failed)
│  ├─ Is the API key set? → Check Authorization header format
│  ├─ Is it a Coding Plan key? → Music needs Pay-as-you-go key
│  ├─ Has the key expired? → Regenerate at platform.minimax.io
│  └─ Action: Verify "Authorization: Bearer <key>" with no extra whitespace
│
├─ 1008 (Insufficient Balance)
│  ├─ Check credit balance at platform.minimax.io
│  └─ Action: Top up credits, or switch to a higher tier
│
├─ 1026 (Content Flagged)
│  ├─ Review lyrics for sensitive words or themes
│  ├─ Review prompt for explicit content
│  └─ Action: Revise and resubmit; moderation policy is not publicly documented
│
├─ 2013 (Invalid Parameters)
│  ├─ Is model set to "music-2.5"? (not "music-01" or other)
│  ├─ Is lyrics between 1-3500 chars?
│  ├─ Is prompt under 2000 chars?
│  ├─ Is sample_rate one of: 16000, 24000, 32000, 44100?
│  ├─ Is bitrate one of: 32000, 64000, 128000, 256000?
│  ├─ Is format one of: "mp3", "wav", "pcm"?
│  ├─ Is output_format one of: "hex", "url"?
│  └─ Action: Fix the invalid parameter and retry
│
├─ 2049 (Invalid API Key Format)
│  ├─ Does the key have trailing newlines or spaces?
│  ├─ Was it copied correctly from the dashboard?
│  └─ Action: Re-copy the key, trim whitespace
│
└─ data.status === 1 (Not an error!)
   └─ Generation is still in progress. Poll again or wait for completion.

Common Parameter Mistakes

Mistake Problem Fix
"model": "music-01" Wrong model for native API Use "music-2.5"
"lyrics": "" Empty lyrics string Lyrics must be 1-3500 chars
"sample_rate": 48000 Invalid sample rate Use 16000, 24000, 32000, or 44100
"bitrate": 320000 Invalid bitrate Use 32000, 64000, 128000, or 256000
"format": "flac" Unsupported format Use "mp3", "wav", or "pcm"
"stream": true + "output_format": "url" Streaming only supports hex Set output_format to "hex" or disable streaming
Missing Content-Type header Server can't parse JSON Add Content-Type: application/json
Key with trailing \n Auth fails silently Trim the key string
Prompt over 2000 chars Rejected by API Shorten the prompt
Lyrics over 3500 chars Rejected by API Shorten lyrics or remove structure tags

HTTP Status Codes

HTTP Status Meaning Action
200 Request processed Check base_resp.status_code for API-level errors
401 Unauthorized API key missing or invalid
429 Too Many Requests Rate limited — back off and retry
500 Server Error Retry after a short delay
503 Service Unavailable Minimax servers overloaded — retry later
FILE:examples/code-examples.md

Code Examples

All examples load the API key from the .env file via environment variables.


Python: Music Generation (URL Output)

import os
import requests
from dotenv import load_dotenv

load_dotenv()
API_KEY = os.getenv("MINIMAX_API_KEY")

def generate_music(prompt, lyrics, output_file="output.mp3"):
    response = requests.post(
        "https://api.minimax.io/v1/music_generation",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type": "application/json"
        },
        json={
            "model": "music-2.5",
            "prompt": prompt,
            "lyrics": lyrics,
            "audio_setting": {
                "sample_rate": 44100,
                "bitrate": 256000,
                "format": "mp3"
            },
            "output_format": "url"
        }
    )
    response.raise_for_status()
    result = response.json()

    if result["base_resp"]["status_code"] != 0:
        raise Exception(f"API error {result['base_resp']['status_code']}: {result['base_resp']['status_msg']}")

    audio_url = result["data"]["audio"]
    duration = result["extra_info"]["music_duration"]
    print(f"Generated {duration:.1f}s of music")

    audio_data = requests.get(audio_url)
    with open(output_file, "wb") as f:
        f.write(audio_data.content)
    print(f"Saved to {output_file}")
    return result

# Usage
generate_music(
    prompt="Indie folk, melancholic, acoustic guitar, soft piano, female vocals",
    lyrics="""[Intro]

[Verse]
Walking through the autumn leaves
Nobody knows where I've been

[Chorus]
Every road leads back to you
Every song I hear rings true

[Outro]
""",
    output_file="my_song.mp3"
)

Python: Music Generation (Hex Output)

import os
import binascii
import requests
from dotenv import load_dotenv

load_dotenv()
API_KEY = os.getenv("MINIMAX_API_KEY")

def generate_music_hex(prompt, lyrics, output_file="output.mp3"):
    response = requests.post(
        "https://api.minimax.io/v1/music_generation",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type": "application/json"
        },
        json={
            "model": "music-2.5",
            "prompt": prompt,
            "lyrics": lyrics,
            "audio_setting": {
                "sample_rate": 44100,
                "bitrate": 256000,
                "format": "mp3"
            },
            "output_format": "hex"
        }
    )
    response.raise_for_status()
    result = response.json()

    if result["base_resp"]["status_code"] != 0:
        raise Exception(f"API error: {result['base_resp']['status_msg']}")

    audio_bytes = binascii.unhexlify(result["data"]["audio"])
    with open(output_file, "wb") as f:
        f.write(audio_bytes)
    print(f"Saved {len(audio_bytes)} bytes to {output_file}")

Python: Two-Step Workflow (Lyrics then Music)

import os
import requests
from dotenv import load_dotenv

load_dotenv()
API_KEY = os.getenv("MINIMAX_API_KEY")
BASE_URL = "https://api.minimax.io/v1"
HEADERS = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json"
}

def generate_lyrics(theme):
    """Step 1: Generate structured lyrics from a theme."""
    response = requests.post(
        f"{BASE_URL}/lyrics_generation",
        headers=HEADERS,
        json={
            "mode": "write_full_song",
            "prompt": theme
        }
    )
    response.raise_for_status()
    data = response.json()
    if data["base_resp"]["status_code"] != 0:
        raise Exception(f"Lyrics error: {data['base_resp']['status_msg']}")
    return data

def generate_music(style_prompt, lyrics, output_file="song.mp3"):
    """Step 2: Generate music from lyrics and a style prompt."""
    response = requests.post(
        f"{BASE_URL}/music_generation",
        headers=HEADERS,
        json={
            "model": "music-2.5",
            "prompt": style_prompt,
            "lyrics": lyrics,
            "audio_setting": {
                "sample_rate": 44100,
                "bitrate": 256000,
                "format": "mp3"
            },
            "output_format": "url"
        }
    )
    response.raise_for_status()
    result = response.json()
    if result["base_resp"]["status_code"] != 0:
        raise Exception(f"Music error: {result['base_resp']['status_msg']}")

    audio_data = requests.get(result["data"]["audio"])
    with open(output_file, "wb") as f:
        f.write(audio_data.content)
    print(f"Saved to {output_file} ({result['extra_info']['music_duration']:.1f}s)")
    return result

# Full workflow
theme = "A soulful blues song about a rainy night and lost love"
style = "Soulful blues, rainy night, melancholy, male vocals, slow tempo, electric guitar, upright bass"

print("Step 1: Generating lyrics...")
lyrics_data = generate_lyrics(theme)
print(f"Title: {lyrics_data['song_title']}")
print(f"Style: {lyrics_data['style_tags']}")
print(f"Lyrics:\n{lyrics_data['lyrics']}\n")

print("Step 2: Generating music...")
generate_music(style, lyrics_data["lyrics"], "blues_song.mp3")

Python: Streaming Response

import os
import json
import binascii
import requests
from dotenv import load_dotenv

load_dotenv()
API_KEY = os.getenv("MINIMAX_API_KEY")

def generate_music_streaming(prompt, lyrics, output_file="stream_output.mp3"):
    response = requests.post(
        "https://api.minimax.io/v1/music_generation",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type": "application/json"
        },
        json={
            "model": "music-2.5",
            "prompt": prompt,
            "lyrics": lyrics,
            "audio_setting": {
                "sample_rate": 44100,
                "bitrate": 256000,
                "format": "mp3"
            },
            "output_format": "hex",
            "stream": True
        },
        stream=True
    )
    response.raise_for_status()

    chunks = []
    for line in response.iter_lines():
        if not line:
            continue
        line_str = line.decode("utf-8")
        if not line_str.startswith("data:"):
            continue
        data = json.loads(line_str[5:].strip())

        if data.get("base_resp", {}).get("status_code", 0) != 0:
            raise Exception(f"Stream error: {data['base_resp']['status_msg']}")

        if data.get("data", {}).get("status") == 1 and data["data"].get("audio"):
            chunks.append(binascii.unhexlify(data["data"]["audio"]))

    audio_bytes = b"".join(chunks)
    with open(output_file, "wb") as f:
        f.write(audio_bytes)
    print(f"Streaming complete: {len(audio_bytes)} bytes saved to {output_file}")

JavaScript / Node.js: Music Generation (URL Output)

import "dotenv/config";
import { writeFile } from "fs/promises";

const API_KEY = process.env.MINIMAX_API_KEY;

async function generateMusic(prompt, lyrics, outputPath = "output.mp3") {
  const response = await fetch("https://api.minimax.io/v1/music_generation", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      model: "music-2.5",
      prompt,
      lyrics,
      audio_setting: { sample_rate: 44100, bitrate: 256000, format: "mp3" },
      output_format: "url",
    }),
  });

  const result = await response.json();

  if (result.base_resp?.status_code !== 0) {
    throw new Error(`API Error ${result.base_resp?.status_code}: ${result.base_resp?.status_msg}`);
  }

  const audioUrl = result.data.audio;
  const audioResponse = await fetch(audioUrl);
  const audioBuffer = Buffer.from(await audioResponse.arrayBuffer());

  await writeFile(outputPath, audioBuffer);
  console.log(`Saved to ${outputPath} (${result.extra_info.music_duration.toFixed(1)}s)`);
  return result;
}

// Usage
await generateMusic(
  "Pop, upbeat, energetic, female vocals, synthesizer, driving beat",
  `[Verse]
Running through the city lights
Everything is burning bright

[Chorus]
We are alive tonight
Dancing through the neon light`,
  "pop_song.mp3"
);

JavaScript / Node.js: Hex Output with Decode

import "dotenv/config";
import { writeFile } from "fs/promises";

const API_KEY = process.env.MINIMAX_API_KEY;

async function generateMusicHex(prompt, lyrics, outputPath = "output.mp3") {
  const response = await fetch("https://api.minimax.io/v1/music_generation", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      model: "music-2.5",
      prompt,
      lyrics,
      audio_setting: { sample_rate: 44100, bitrate: 256000, format: "mp3" },
      output_format: "hex",
    }),
  });

  const result = await response.json();

  if (result.base_resp?.status_code !== 0) {
    throw new Error(`API Error: ${result.base_resp?.status_msg}`);
  }

  const audioBuffer = Buffer.from(result.data.audio, "hex");
  await writeFile(outputPath, audioBuffer);
  console.log(`Saved ${audioBuffer.length} bytes to ${outputPath}`);
}

JavaScript / Node.js: Streaming

import "dotenv/config";
import { writeFile } from "fs/promises";

const API_KEY = process.env.MINIMAX_API_KEY;

async function generateMusicStreaming(prompt, lyrics, outputPath = "stream_output.mp3") {
  const response = await fetch("https://api.minimax.io/v1/music_generation", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      model: "music-2.5",
      prompt,
      lyrics,
      audio_setting: { sample_rate: 44100, bitrate: 256000, format: "mp3" },
      output_format: "hex",
      stream: true,
    }),
  });

  const chunks = [];
  const decoder = new TextDecoder();
  const reader = response.body.getReader();
  let buffer = "";

  while (true) {
    const { done, value } = await reader.read();
    if (done) break;

    buffer += decoder.decode(value, { stream: true });
    let boundary;

    while ((boundary = buffer.indexOf("\n\n")) !== -1) {
      const event = buffer.slice(0, boundary).trim();
      buffer = buffer.slice(boundary + 2);

      if (!event) continue;
      const dataMatch = event.match(/^data:\s*(.+)$/m);
      if (!dataMatch) continue;

      const parsed = JSON.parse(dataMatch[1]);

      if (parsed.base_resp?.status_code !== 0) {
        throw new Error(`Stream error: ${parsed.base_resp?.status_msg}`);
      }

      if (parsed.data?.status === 1 && parsed.data?.audio) {
        chunks.push(Buffer.from(parsed.data.audio, "hex"));
      }
    }
  }

  const fullAudio = Buffer.concat(chunks);
  await writeFile(outputPath, fullAudio);
  console.log(`Streaming complete: ${fullAudio.length} bytes saved to ${outputPath}`);
}

cURL: Music Generation

curl -X POST "https://api.minimax.io/v1/music_generation" \
  -H "Authorization: Bearer $MINIMAX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "music-2.5",
    "prompt": "Indie folk, melancholic, acoustic guitar, soft piano",
    "lyrics": "[Verse]\nWalking through the autumn leaves\nNobody knows where I have been\n\n[Chorus]\nEvery road leads back to you\nEvery song I hear rings true",
    "audio_setting": {
      "sample_rate": 44100,
      "bitrate": 256000,
      "format": "mp3"
    },
    "output_format": "url"
  }'

cURL: Lyrics Generation

curl -X POST "https://api.minimax.io/v1/lyrics_generation" \
  -H "Authorization: Bearer $MINIMAX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "mode": "write_full_song",
    "prompt": "A soulful blues song about a rainy night and lost love"
  }'

Audio Quality Presets

Python dict presets

QUALITY_LOW = {"sample_rate": 16000, "bitrate": 64000, "format": "mp3"}
QUALITY_PREVIEW = {"sample_rate": 24000, "bitrate": 128000, "format": "mp3"}
QUALITY_STANDARD = {"sample_rate": 44100, "bitrate": 256000, "format": "mp3"}
QUALITY_PROFESSIONAL = {"sample_rate": 44100, "bitrate": 256000, "format": "wav"}

JavaScript object presets

const QUALITY_LOW = { sample_rate: 16000, bitrate: 64000, format: "mp3" };
const QUALITY_PREVIEW = { sample_rate: 24000, bitrate: 128000, format: "mp3" };
const QUALITY_STANDARD = { sample_rate: 44100, bitrate: 256000, format: "mp3" };
const QUALITY_PROFESSIONAL = { sample_rate: 44100, bitrate: 256000, format: "wav" };

FILE:examples/lyrics-templates.md

Lyrics Templates

Song Structure Patterns

Common arrangements as tag sequences:

Standard Pop/Rock: [Intro] → [Verse] → [Pre Chorus] → [Chorus] → [Verse] → [Pre Chorus] → [Chorus] → [Bridge] → [Chorus] → [Outro]

Ballad: [Intro] → [Verse] → [Verse] → [Chorus] → [Verse] → [Chorus] → [Bridge] → [Chorus] → [Outro]

Electronic/Dance: [Intro] → [Build Up] → [Chorus] → [Break] → [Verse] → [Build Up] → [Chorus] → [Outro]

Simple/Short: [Verse] → [Chorus] → [Verse] → [Chorus] → [Outro]

Progressive/Epic: [Intro] → [Verse] → [Pre Chorus] → [Chorus] → [Interlude] → [Verse] → [Pre Chorus] → [Chorus] → [Bridge] → [Solo] → [Build Up] → [Chorus] → [Outro]


Pop Song Template

[Intro]

[Verse]
Morning light breaks through my window pane
Another day I try to start again
The coffee's cold, the silence fills the room
But something tells me change is coming soon

[Pre Chorus]
I can feel it in the air tonight
Something shifting, pulling me toward the light

[Chorus]
I'm breaking through the walls I built
Letting go of all this guilt
Every step I take is mine
I'm finally feeling fine
I'm breaking through

[Verse]
The photographs are fading on the shelf
I'm learning how to just be myself
No more hiding underneath the weight
Of everything I thought would make me great

[Pre Chorus]
I can feel it in the air tonight
Something shifting, pulling me toward the light

[Chorus]
I'm breaking through the walls I built
Letting go of all this guilt
Every step I take is mine
I'm finally feeling fine
I'm breaking through

[Bridge]
It took so long to see
The only one holding me back was me

[Chorus]
I'm breaking through the walls I built
Letting go of all this guilt
Every step I take is mine
I'm finally feeling fine
I'm breaking through

[Outro]

Rock Song Template

[Intro]

[Verse]
Engines roar on an empty highway
Headlights cutting through the dark
Running from the life I used to know
Chasing down a distant spark

[Verse]
Radio plays our broken anthem
Windows down and letting go
Every mile puts it all behind me
Every sign says don't look home

[Pre Chorus]
Tonight we burn it all
Tonight we rise or fall

[Chorus]
We are the reckless hearts
Tearing the world apart
Nothing can stop this fire inside
We are the reckless hearts

[Inst]

[Verse]
Streetlights flicker like a warning
But I'm too far gone to care
Took the long road out of nowhere
Found myself already there

[Pre Chorus]
Tonight we burn it all
Tonight we rise or fall

[Chorus]
We are the reckless hearts
Tearing the world apart
Nothing can stop this fire inside
We are the reckless hearts

[Bridge]
They said we'd never make it
Said we'd crash and burn
But look at us still standing
Every scar a lesson learned

[Solo]

[Build Up]
We are we are we are

[Chorus]
We are the reckless hearts
Tearing the world apart
Nothing can stop this fire inside
We are the reckless hearts

[Outro]

Ballad Template

[Intro]

[Verse]
The winter trees are bare and still
Snow falls softly on the hill
I remember when you held my hand
Walking paths we used to plan

[Verse]
Your laughter echoes in these halls
Your name is written on these walls
Time has taken what we had
But memories still make me glad

[Chorus]
I will carry you with me
Through the storms and through the sea
Even when the world goes dark
You're the ember in my heart
I will carry you

[Verse]
The seasons change but I remain
Standing here through sun and rain
Every star I see at night
Reminds me of your gentle light

[Chorus]
I will carry you with me
Through the storms and through the sea
Even when the world goes dark
You're the ember in my heart
I will carry you

[Bridge]
And if the years should wash away
Every word I meant to say
Know that love was always true
Every moment led to you

[Chorus]
I will carry you with me
Through the storms and through the sea
Even when the world goes dark
You're the ember in my heart
I will carry you

[Outro]

Hip-Hop / R&B Template

[Intro]

[Verse]
City lights reflecting off the rain
Another late night grinding through the pain
Started from the bottom with a dream
Nothing's ever easy as it seems
Momma said to keep my head up high
Even when the storm clouds fill the sky
Now I'm standing tall above the noise
Found my voice and made a choice

[Hook]
We don't stop we keep it moving
Every day we keep on proving
That the grind don't stop for nothing
We keep pushing keep on hustling

[Verse]
Look around at everything we built
From the ashes rising no more guilt
Every scar a story that I own
Seeds of struggle finally have grown
Late nights early mornings on repeat
Every setback made the win more sweet
Now they see the vision crystal clear
We've been building this for years

[Hook]
We don't stop we keep it moving
Every day we keep on proving
That the grind don't stop for nothing
We keep pushing keep on hustling

[Bridge]
From the bottom to the top
We don't know how to stop

[Hook]
We don't stop we keep it moving
Every day we keep on proving
That the grind don't stop for nothing
We keep pushing keep on hustling

[Outro]

Electronic / Dance Template

[Intro]

[Build Up]
Feel the pulse beneath the floor
Can you hear it wanting more

[Chorus]
Lose yourself in neon lights
We're alive alive tonight
Let the music take control
Feel the rhythm in your soul
We're alive alive tonight

[Break]

[Verse]
Strangers dancing side by side
In this moment nothing to hide
Every heartbeat syncs in time
Lost in rhythm lost in rhyme

[Build Up]
Feel the pulse beneath the floor
Can you hear it wanting more
Louder louder

[Chorus]
Lose yourself in neon lights
We're alive alive tonight
Let the music take control
Feel the rhythm in your soul
We're alive alive tonight

[Inst]

[Build Up]
One more time

[Chorus]
Lose yourself in neon lights
We're alive alive tonight
Let the music take control
Feel the rhythm in your soul
We're alive alive tonight

[Outro]

Folk / Acoustic Template

[Intro]

[Verse]
Down by the river where the willows lean
I found a letter in the autumn green
Words like water flowing soft and slow
Telling stories from so long ago

[Verse]
My grandfather walked these roads before
Carried burdens through a world at war
But he never lost his gentle way
And his kindness lives in me today

[Chorus]
These old roads remember everything
Every footstep every song we sing
Through the valleys and the mountain air
Love is planted everywhere
These old roads remember

[Verse]
Now the seasons paint the hills with gold
And the stories keep the young from cold
Every sunset brings a quiet prayer
For the ones who are no longer there

[Chorus]
These old roads remember everything
Every footstep every song we sing
Through the valleys and the mountain air
Love is planted everywhere
These old roads remember

[Bridge]
So I'll walk a little further still
Past the chapel on the distant hill
And I'll listen for the echoes there
Carried softly through the evening air

[Chorus]
These old roads remember everything
Every footstep every song we sing
Through the valleys and the mountain air
Love is planted everywhere
These old roads remember

[Outro]

Jazz Template

[Intro]

[Verse]
Smoke curls slowly in the amber light
Piano whispers through the velvet night
A glass of something golden in my hand
The drummer keeps a brushstroke on the snare

[Verse]
She walked in like a song I used to know
A melody from many years ago
Her smile could melt the winter off the glass
Some moments were not meant to ever last

[Chorus]
But we danced until the morning came
Two strangers playing at a nameless game
The saxophone was crying soft and low
And neither one of us wanted to go

[Solo]

[Verse]
The city sleeps but we are wide awake
Sharing secrets for each other's sake
Tomorrow we'll be strangers once again
But tonight we're more than just old friends

[Chorus]
And we danced until the morning came
Two strangers playing at a nameless game
The saxophone was crying soft and low
And neither one of us wanted to go

[Outro]

Instrumental-Only Templates

Cinematic Instrumental

[Intro]

[Inst]
(Soft piano, building strings)

[Build Up]
(Full orchestra swelling)

[Inst]
(Triumphant brass and percussion)

[Interlude]
(Gentle woodwinds, reflective)

[Build Up]
(Timpani roll, rising tension)

[Inst]
(Full symphonic climax)

[Outro]
(Fading strings, peaceful resolution)

Guitar Solo Showcase

[Intro]

[Inst]
(Rhythm guitar and bass groove)

[Solo]
(Lead guitar melody)

[Inst]
(Full band groove)

[Solo]
(Extended guitar solo, building intensity)

[Break]

[Solo]
(Final guitar solo, emotional peak)

[Outro]

Ambient / Atmospheric

[Intro]

[Inst]
(Ethereal synth pads, slow evolution)

[Transition]

[Inst]
(Layered textures, subtle percussion)

[Interlude]
(Minimal, spacious)

[Build Up]
(Gradually intensifying)

[Inst]
(Full atmospheric wash)

[Outro]
(Slowly dissolving into silence)

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Compatible Platforms

Pricing

Free

Related Configs