**Note:** If you are a distributor integrating with DNSFilter, please check out our [Distributors Development Guide](/docs/distributors).### Authentication- Authentication is required for most, but not all, endpoints.- Authentication is done by setting the `Authorization` request header. The header value is the API key itself. For example: `Authorization: eyJ...`- An API key can be obtained through the DNSFilter dashboard under Account Settings. For additional information see [this KB article](https://help.dnsfilter.com/hc/en-us/articles/21169189058323-API-Tokens).### Rate Limiting- All endpoints are rate limited.- The limits may vary by endpoint, but are generally consistent.- When the rate limit is exceeded the API will return the standard `429` HTTP status.- The following headers will also be provided in the response: `Retry-After`, `RateLimit-Policy`, `RateLimit`, `RateLimit-Limit`, `RateLimit-Remaining`, `RateLimit-Reset`. For details on the values of these headers, see the following articles [here](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After), [here](https://www.ietf.org/archive/id/draft-ietf-httpapi-ratelimit-headers-08.html), and [here](https://www.ietf.org/archive/id/draft-polli-ratelimit-headers-05.html).- For additional information see [this KB article](https://help.dnsfilter.com/hc/en-us/articles/38202811088403-API-Rate-Limits).### Error Handling- The API uses standard HTTP status codes to indicate success or failure.- For _V1_ endpoints the response format is: ```json { "error": "string", "type": "string(optional)" } ```- For _V2_ endpoints the response format is: ```json { "error": { "message": "string", "type": "string(optional)" } } ```### PaginationFor the _V1_ endpoints, the pagination parameters are nested. That is to say,if passed as JSON they look like this: `{"page[number]": 1, "page[size]": 10}`.To pass this information in the URL query string, it would be formatted likethis: `...?page%5Bnumber%5D=1&page%5Bsize%5D=10`.In this guide, the UI will indicate that `page` is an `object` and if youwant to set values when trying the request, you must enter it as if it wasthe JSON above.### A Quick ExampleThe following will return information about the currentlyauthenticated user.```bash% curl -H 'Authorization: ***' https://api.dnsfilter.com/v1/users/self{ "data": { "id": "12345", "type": "users", "attributes": { "name": "John Doe", "email": "john@example.com", ...additional fields...}}}```