Animals — entry 018 of 20
RescueGroups
RescueGroups.org's v5 REST API follows the JSON:API specification, giving developers standardized read access to adoptable-pet listings and shelter/rescue-organization records across its member network, plus account-scoped write access for member organizations. Every request needs an Authorization header — a free public API key for public adoptable-pet data, or a Bearer token (from a member login) for private, account-scoped operations — confirmed live: a call with no Authorization header returns a 401 "Missing authorization header" error, and that same call plus a separate OPTIONS preflight, both sent with an Origin header, echo access-control-allow-origin: * back. The public API key is free to request via a signup form on the RescueGroups.org site, with no published rate ceiling — only an abuse-triggered 429 if request volume looks abnormal.
GreatAPIs Score
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<a href="https://greatapis.com/api/rescuegroups/"><img src="https://greatapis.com/badge/rescuegroups.svg" alt="Scored 78 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Developer reference
Not published — abuse-prevention only, 429 on excessive requests