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Base URLs

The Relace API is organized into two base URLs: models.relace.ai for direct AI model access, and api.relace.run for general infrastructure services including source control.

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Model Endpoints

All hosted models are served from this base url — the route determines which model you are using. e.g. /v1/code/apply, /v2/code/rank, /v1/code/compact.

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Infrastructure Endpoints

For accessing our infrastructure (e.g. source control) you will use the routes specified in this API reference with our common base url.

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Authentication

To authenticate you need to add an Authorization header with the contents of the header being your Relace API Key, which is a 32 digit key with with the prefix rlc-.

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Response Codes

Relace uses standard HTTP codes to indicate the success or failure of your requests. In general, 2xx HTTP codes correspond to success, 4xx codes are for user-related failures, and 5xx codes are for infrastructure issues. Check Error Codes for a comprehensive breakdown of all possible API errors.

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Rate Limits

Rate limits vary by tier and range from 3 calls per minute for free testing access to unlimited calls for high-volume users. When you exceed your rate limit, you’ll receive a 429 response error code. See the full rate limits table for detailed information about each tier’s limits.