Check coverage
platforms.polymarket. These capability keys all return supported:
The compatibility names carry the same values as their current names.
/api/v1/platforms is a deprecated alias of /api/v1/coverage.
Coverage describes supported features. It does not check the provider on each request or report the age of a particular value; use trust metadata for that.
Use the platform filter
Some endpoints accept platform for compatibility with existing clients:
An unsupported value on the history or flow endpoints returns
400, with error.param set to platform.
Read the response field
Limits
Anull platform is a missing field value. It does not identify a different provider.