Once your Meta account is connected, head over to the API Docs to make live test calls against every endpoint with your own ad accounts, pages, and pixels.
Every endpoint requires your bearer token. The tester uses your live Meta credentials when you are connected. All query parameters are sent as query parameters (never path tokens). Bodies are valid JSON.
Required on every request as the X-API-Key header. The in-browser tester below sends it for you automatically. Treat this like a password — anyone with it can call the API as you.
Both files are kept in lockstep with this API. Any change to an endpoint updates both — they are the canonical contract for humans and AI agents.