Kokoro 82M Serverless API

Text-to-speech with 54 multilingual voices.

POST /v2/kokoro-82m · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3import segmind
 4
 5# Async (v2): submit to the queue and block until COMPLETED.
 6# run() returns the final result dict (600s deadline, 1.0s poll by default).
 7result = segmind.run(
 8    "kokoro-82m",
 9    text="The morning sun rose over the quiet harbor as the fishing boats drifted out to sea, their sails catching the first golden light of a brand new day.",
10    voice="af_heart",
11    speed=1,
12    format="wav",
13)
14print(result["status"])                      # COMPLETED
15print(result.get("output"))                  # model output (e.g. media URL)
16print(result["metrics"]["inference_time"])   # server compute seconds
17
18# --- Or submit + poll manually (track request_id, control the cadence) ---
19from segmind import SegmindClient, InferenceFailed, InferenceTimeout
20
21client = SegmindClient()                      # reads SEGMIND_API_KEY
22payload = {
23    "text": "The morning sun rose over the quiet harbor as the fishing boats drifted out to sea, their sails catching the first golden light of a brand new day.",
24    "voice": "af_heart",
25    "speed": 1,
26    "format": "wav",
27}
28job = client.submit_async("kokoro-82m", **payload)
29print(job.request_id)                         # available immediately
30try:
31    result = job.wait(timeout=600, interval=1.0)
32except InferenceTimeout as e:
33    print("still running:", e.request_id)
34except InferenceFailed as e:
35    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/kokoro-82m

Parameters

textrequired
string

The text to speak. Up to 5,000 characters; billing is per character.

Default: "Kokoro is an open-weight text to speech model with eighty-two million parameters. It runs fast enough to narrate a whole article in about a second."
base64optional
boolean
Default: false
formatoptional
string

Audio container of the returned file.

Default: "wav"
Allowed values :
WAV (24kHz mono)"wav"
MP3 (128 kbps)"mp3"
speedoptional
number

Playback rate of the generated speech. 1.0 is the model's natural pace.

Default: 1Range: 0.5 - 2
voiceoptional
string

Voice to speak with. The voice also selects the language — 54 voices across 9 languages.

Default: "af_heart"
Allowed values (54 total):
Heart (American English, Female)"af_heart"
Bella (American English, Female)"af_bella"
Nicole (American English, Female)"af_nicole"
Aoede (American English, Female)"af_aoede"
Kore (American English, Female)"af_kore"
Sarah (American English, Female)"af_sarah"
Alloy (American English, Female)"af_alloy"
Nova (American English, Female)"af_nova"
Sky (American English, Female)"af_sky"
Jessica (American English, Female)"af_jessica"
+44 more

Response Type

Returns: Audio

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

  1. 1
    POST /v2/kokoro-82m

    Submitreturns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Polluntil COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Resultfinal response body

Status states

QUEUEDAccepted, waiting for a worker
PROCESSINGRunning on a worker
COMPLETEDDone — result body is ready
FAILEDErrored (incl. content/RAI blocks)
  • A FAILED request is served as HTTP 422 — the body still carries the error detail.
  • An unknown or expired request_id returns HTTP 404.
  • Results are retained for 1 hour, then expire.
  • Content / RAI blocks surface as FAILED, not a separate state.
  • Track completion by polling the status endpoint.

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out