The Sendr API lets you interact with your workspace programmatically, including adding contacts, triggering page generation, managing sheets, and more. API access is included in Sendr Core and the free trial.

Base URL

The Sendr API base URL is https://api.sendr.io/

Full API documentation, including the complete list of available endpoints and request formats, is available at docs.sendr.io.

Authentication

All API requests are authenticated using an API key passed in the request header. See "Authenticating API requests" for how to include your key correctly.

Getting your API key

Go to Settings > API to create your first API key. See "Creating and revoking API keys" for steps.

Rate limits

The API has rate limits in place to ensure stability. If you hit a rate limit you will receive a 429 response. Back off and retry after a short delay. Specific rate limit values are documented in the API reference.

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