The contract-governed endpoints and every parameter each one accepts — names, aliases, bounds, defaults, the vocabulary a value is validated against, and the params deliberately rejected with what to use instead. Served from the same descriptors the API imports at request time, so it cannot describe behaviour the server does not have. Not metered.
GDELT Cloud API key. Send as Authorization: Bearer gdelt_sk_....
Return one endpoint instead of all of them. Accepts either the descriptor id (events-list) or the path (/api/v2/events). An unknown value returns 404 NOT_FOUND with the available ids in details.available. Note: validation is owned by the endpoint service because it depends on composed or cross-parameter state; the published error semantics above still apply.