The playground

Try any of 919 endpoints — live.

Pick an endpoint, load a working example, tweak the params, and send — no signup to try. Results render the way the data deserves; raw JSON, headers & code are one tab away.

Playground demo key · api.reefapi.com

post/mcp-registry/v1/list_sources0 credits

The registries this engine aggregates, their roles, auth status and live reachability. Free.

Parameters

No parameters — just send.

request preview

curl -X POST https://api.reefapi.com/mcp-registry/v1/list_sources \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{}'

Hit Send to run this endpoint live.