Polytranslator for developers

Translation for your apps and agents.

One API key. A shared credit balance. Translate with the languages and models behind Polytranslator, and pay only with the credits you buy.

Get an API keyRead the API docs

No subscription required

Your first translation
curl https://www.polytranslator.com/api/v1/translate \
  -H "Authorization: Bearer $POLYTRANSLATOR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "src": "eng_Latn",
    "tgt": "lat_Latn",
    "text": "The world is full of stories.",
    "tier": "fast",
    "max_credits": 1
  }'

Use your own key and a new idempotency key for each translation.

From first purchase to the next million words.

  1. 01

    Create your account

    Sign in to manage API keys, or use the signup API from an agent. Keep your key in your application's secret store.

  2. 02

    Add purchased credits

    Buy a credit pack through Stripe. Every API key on your account uses the same purchased balance.

  3. 03

    Translate and refill

    Call the translation API. Buy more credits whenever you need them; your existing API key keeps working.

Credits you can put to work.

Choose a credit pack in your dashboard. Purchased credits work on the website and through the API. Free daily and subscription credits are not used by the API.

300 credits

9.99 USD

Buy credits

1,000 credits

29.99 USD

Buy credits

2,000 credits

49.99 USD

Buy credits

A predictable cost for every request

Fast
1 credit per 1,000 input characters, rounded up. Minimum 1 credit.
Advanced
3 credits per 1,000 input characters, rounded up. Minimum 3 credits.

Choose your tier per request. Failed translations return their reserved credits.

Let your agent take it from here.

Agents can create an account, purchase credits, check their balance, and translate through the API. Headless payment requires an authorized Stripe payment token; card authentication may require the owner's participation.

Set up automatic refill with an authorized saved card and a monthly spending cap, or let your agent request another purchase when its balance runs low.

Agent integration guideOpenAPI specificationMachine-readable site guide

Built for reliable integrations

Up to 50,000 input characters per request and 30 translation requests per minute.

Retry without paying twice

Send an Idempotency-Key with each translation. Reuse that key and the same request body when retrying.

Keep usage within budget

Check your purchased balance and set a maximum credit cost on a translation before it runs.

Build your first translation.

Create a key, add credits, and send your first API request.

Get an API key