Get started
Get a Rankfield API key, make your first request, and learn how keys, errors, rate limits and batch jobs work.
Every Rankfield endpoint takes the same API key in the same header, answers in JSON, and returns errors with an HTTP status you can act on. Read these pages once; the endpoint pages then only describe what differs.
Pages
QuickstartGet an API key, make your first Rankfield request with cURL, Python or JavaScript, and read the answer.AuthenticationAuthenticate every Rankfield API request with your API key in the Authorization header, and keep the key safe.ErrorsRead Rankfield API errors: the HTTP status codes, the JSON error body of each endpoint family, and which errors to retry.Rate limitsSee how much one Rankfield request or job can hold, what a busy server answers, and how to avoid 429 errors.Batch jobsSend many URLs, domains or keywords in one Rankfield batch job, follow its progress, and read results as they finish.