Create an account on the portal, then go to My Applications to create an application. Your Application Secret is displayed upon creation — copy it and store it securely. Once your application is approved, you can use it in your API calls. See the getting started guide for more details. :::

The Sandbox environment (https://sandbox-api.stef.com) is dedicated to testing — no quotas, synthetic data. The Production environment (https://api.stef.com) uses real data with the quotas defined in your access plan. :::

OAuth 2.0 tokens expire after 1 hour. Request a new token via the /oauth2/token endpoint. We recommend implementing an automatic refresh mechanism. See the authentication guide. :::

You have reached your plan's request limit. Check the X-RateLimit-Remaining and Retry-After headers in the response and implement exponential backoff. See best practices for rate limiting management. :::

Each API has a Try it mode on its documentation page on this portal. You can also export the OpenAPI specification and import it into Insomnia or Postman using the dedicated button. :::