Generate Lyrics

POST/api/v1/suno/lyricsCopy URL

Authentication · x-api-key

Create lyrics without changing the established request contract. `candidates=2` succeeds only after both ordered A/B candidates complete. Each completed text resource may include `metadata.stylePrompt` and compatibility `metadata.tags: [stylePrompt]`; style expansion is best-effort and never turns completed lyrics into a failed Task. The optional `lyricsModel` currently accepts only `default`. Returns a task id — poll `GET /api/v1/tasks/{taskId}` for the result. `Idempotency-Key` is optional but recommended for safe client retries. For a synchronous lyrics call, use `POST /api/v1/lyrics/generate`.

All endpointsRequestResponsesCode

Request

Idempotency-Keyheader · Optional

string

Unique key for one logical write. Retrying the same body with the same key replays the original result; reusing it with a different body returns 409.

Maximum characters: 255.

Unknown fields are not accepted.

• Request · promptRequired

  string

  Primary creative or operation instruction.

  Maximum characters: 3000.

• Request · candidatesOptional

  1 | 2

  1 = single lyrics (default), 2 = paired candidates (LYRICS_PAIR).

• Request · configOptional

  object

  Standard task configuration: priority, tags, metadata, and webhookUrl.

  4 fields

  • Request · config.metadataOptional

    object

    Free-form caller metadata, echoed back on read. Stored as opaque JSON; the server never mutates it.

  • Request · config.priorityOptional

    number

    Task priority 1-10 (higher = sooner). Default 5.

    Minimum: 1. Maximum: 10. Default: 5.

  • Request · config.tagsOptional

    array<string>

    Free-form labels for filtering. Up to 20, 100 chars each.

    Maximum items: 20.

    1 field

    • Request · config.tags[]Each item

      string

      Maximum characters: 100.

  • Request · config.webhookUrlOptional

    string

    URL to receive task.* lifecycle events via the central webhook service.

    Format: uri.

• Request · lyricsModelOptional

  string

  Only the stable "default" lyrics model is supported for candidates=2.

  Maximum characters: 100.

• Request · sourceOptional

  string

  Optional caller label retained in Task audit input for candidates=2.

  Maximum characters: 100.

Responses

200 OK

application/json

Unknown fields are not accepted.

• Response 200 · creditsRequiredRequired

  number

  Minimum: 0.

• Response 200 · linksRequired

  object

  Unknown fields are not accepted.

  3 fields

  • Response 200 · links.finalRequired

    string | null

    May be null. Must match at least one alternative.

    2 fields / alternatives

    • Response 200 · links.final · anyOf 1Alternative

      string

    • Response 200 · links.final · anyOf 2Alternative

      null

  • Response 200 · links.resourceRequired

    string | null

    May be null. Must match at least one alternative.

    2 fields / alternatives

    • Response 200 · links.resource · anyOf 1Alternative

      string

    • Response 200 · links.resource · anyOf 2Alternative

      null

  • Response 200 · links.taskRequired

    string

• Response 200 · pricingRequired

  object

  Unknown fields are not accepted.

  9 fields

  • Response 200 · pricing.adjustmentCreditsRequired

    number

    chargedCredits - baseCredits

  • Response 200 · pricing.baseCreditsRequired

    number

    Standard quoted credits before customer pricing adjustment

  • Response 200 · pricing.chargedCreditsRequired

    number

    Credits charged for this create request

    Minimum: 0.

  • Response 200 · pricing.quoteVersionRequired

    number

    Pricing quote version stored with the task

  • Response 200 · pricing.sourceRequired

    "standard" | "customer_rule"

    Public pricing source category

  • Response 200 · pricing.billingIncrementCreditsOptional

    number

    Smallest customer charge increment

    Minimum: 0.0001.

  • Response 200 · pricing.calculatedCreditsOptional

    number

    Precise whole-order subtotal before settlement rounding

  • Response 200 · pricing.settlementPolicyVersionOptional

    string

    Versioned customer settlement policy

  • Response 200 · pricing.settlementRoundingCreditsOptional

    number

    Whole-order rounding adjustment added at settlement

    Minimum: 0.

• Response 200 · productRequired

  object

  Unknown fields are not accepted.

  7 fields

  • Response 200 · product.featureCodeRequired

    string

    Resolved feature code

  • Response 200 · product.modelCodeRequired

    string

    Resolved model code

  • Response 200 · product.providerCodeRequired

    string

    Resolved provider code

  • Response 200 · product.resourceIdRequired

    string | null

    May be null. Must match at least one alternative.

    2 fields / alternatives

    • Response 200 · product.resourceId · anyOf 1Alternative

      string

      Product resource id when created synchronously

    • Response 200 · product.resourceId · anyOf 2Alternative

      null

  • Response 200 · product.typeRequired

    string

    Product family for this task, e.g. suno, producer, mv

  • Response 200 · product.autoFinalizeOptional

    boolean

    Whether the product should finalize automatically

  • Response 200 · product.deliveryStatusOptional

    string | null

    May be null. Must match at least one alternative.

    2 fields / alternatives

    • Response 200 · product.deliveryStatus · anyOf 1Alternative

      string

      Product-level delivery status when applicable

    • Response 200 · product.deliveryStatus · anyOf 2Alternative

      null

• Response 200 · requestIdRequired

  string | null

  May be null. Must match at least one alternative.

  2 fields / alternatives

  • Response 200 · requestId · anyOf 1Alternative

    string

  • Response 200 · requestId · anyOf 2Alternative

    null

• Response 200 · statusRequired

  "PENDING" | "PROCESSING" | "COMPLETED" | "FAILED" | "CANCELLED"

  Default: "PENDING".

• Response 200 · taskIdRequired

  string

• Response 200 · warningCodesRequired

  array<string>
  1 field

  • Response 200 · warningCodes[]Each item

    string

• Response 200 · estimatedCompletionTimeOptional

  string | null

  May be null. Must match at least one alternative.

  2 fields / alternatives

  • Response 200 · estimatedCompletionTime · anyOf 1Alternative

    string

    Estimated completion time as an RFC 3339 string.

    Format: date-time.

  • Response 200 · estimatedCompletionTime · anyOf 2Alternative

    null

400 Bad Request

application/json

• Response 400 · errorRequired

  object
  3 fields

  • Response 400 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 400 · error.messageRequired

    string

    Human readable error message

  • Response 400 · error.detailsOptional

    object

    Additional error details (optional)

• Response 400 · successRequired

  false

  Always false for error responses

401 Unauthorized

application/json

• Response 401 · errorRequired

  object
  3 fields

  • Response 401 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 401 · error.messageRequired

    string

    Human readable error message

  • Response 401 · error.detailsOptional

    object

    Additional error details (optional)

• Response 401 · successRequired

  false

  Always false for error responses

402 Payment Required

application/json

• Response 402 · errorRequired

  object
  3 fields

  • Response 402 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 402 · error.messageRequired

    string

    Human readable error message

  • Response 402 · error.detailsOptional

    object

    Additional error details (optional)

• Response 402 · successRequired

  false

  Always false for error responses

403 Forbidden

Forbidden: the API key lacks the required scope or its IP policy rejects this request. Forbidden: API-key scope/IP restrictions or billing hold. A positive balance does not bypass payment review. Check GET /api/v1/account/credits billingStatus before further paid requests.

application/json

• Response 403 · errorRequired

  object
  3 fields

  • Response 403 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 403 · error.messageRequired

    string

    Human readable error message

  • Response 403 · error.detailsOptional

    object

    Additional error details (optional)

• Response 403 · successRequired

  false

  Always false for error responses

422 Unprocessable Entity

application/json

• Response 422 · errorRequired

  object
  3 fields

  • Response 422 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 422 · error.messageRequired

    string

    Human readable error message

  • Response 422 · error.detailsOptional

    object

    Additional error details (optional)

• Response 422 · successRequired

  false

  Always false for error responses

429 Too Many Requests

Request allowance or task admission capacity exceeded. Follow Retry-After when present; otherwise wait for active tasks and use bounded backoff. Limits do not guarantee throughput. For SSE, this is the HTTP connection response, not an event.

application/json

• Response 429 · errorRequired

  object
  3 fields

  • Response 429 · error.codeRequired

    string

    RATE_LIMITED for request and task admission rejections.

  • Response 429 · error.messageRequired

    string

  • Response 429 · error.detailsOptional

    object

    Optional and scope-dependent. Request limits supply scope/policy/type/limit/current/retryAfterSec. Task admission supplies inFlight/limit/tier, plus scope=apiKey for a key cap. IP rejection can omit details. In-flight rejection does not promise Retry-After.

    8 fields

    • Response 429 · error.details.currentOptional

      integer

      Minimum: 0.

    • Response 429 · error.details.inFlightOptional

      integer

      Minimum: 0.

    • Response 429 · error.details.limitOptional

      integer

      Minimum: 0.

    • Response 429 · error.details.policyOptional

      "operation" | "query"

    • Response 429 · error.details.retryAfterSecOptional

      integer

      Minimum: 1.

    • Response 429 · error.details.scopeOptional

      "user" | "api-key" | "ip" | "apiKey"

    • Response 429 · error.details.tierOptional

      "FREE" | "PREMIUM" | "ENTERPRISE"

    • Response 429 · error.details.typeOptional

      "rps" | "daily" | "monthly"

• Response 429 · successRequired

  false

  Default: false.

500 Internal Server Error

application/json

• Response 500 · errorRequired

  object
  3 fields

  • Response 500 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 500 · error.messageRequired

    string

    Human readable error message

  • Response 500 · error.detailsOptional

    object

    Additional error details (optional)

• Response 500 · successRequired

  false

  Always false for error responses

503 Service Unavailable

application/json

• Response 503 · errorRequired

  object
  3 fields

  • Response 503 · error.codeRequired

    string

    Application-specific error code (see error catalog)

  • Response 503 · error.messageRequired

    string

    Human readable error message

  • Response 503 · error.detailsOptional

    object

    Additional error details (optional)

• Response 503 · successRequired

  false

  Always false for error responses

Request example

Wrap lines

cURL

curl --globoff --request POST \
  --url 'https://api.omnapi.com/api/v1/suno/lyrics' \
  --header "x-api-key: $OMNAPI_KEY" \
  --header "Idempotency-Key: $IDEMPOTENCY_KEY" \
  --header 'Content-Type: application/json' \
  --data @request.json

Node.js

import { readFile } from "node:fs/promises";
const response = await fetch("https://api.omnapi.com/api/v1/suno/lyrics", {
  method: "POST",
  headers: {
    "x-api-key": process.env.OMNAPI_KEY,
    "Idempotency-Key": process.env.IDEMPOTENCY_KEY,
    "Content-Type": "application/json",
  },
  body: await readFile("request.json", "utf8"),
});
if (!response.ok) throw new Error(await response.text());
console.log(await response.text());

Python

import os, json
import requests

response = requests.request(
    "POST", "https://api.omnapi.com/api/v1/suno/lyrics",
    headers={
        "x-api-key": os.environ["OMNAPI_KEY"],
        "Idempotency-Key": os.environ["IDEMPOTENCY_KEY"],
    },
    json=json.load(open("request.json")),
    timeout=60,
)
response.raise_for_status()
print(response.text)

Set URL and header variables. Save your JSON body as request.json. Reuse the same IDEMPOTENCY_KEY and body on retries.

Interactive API Explorer → · OpenAPI JSON