"protocols.io" matching MCP connectors:
GET /v1/connectors – MCP directory API referencePublish your API docs so AI assistants can look up endpoints and call your API correctly.
Send and debug webhooks — applications, endpoints, messages, delivery attempts and replays.
See which AI models fall for traps in everyday jobs, and check or scan any MCP server, skill or package before your agent installs it. No sign-in; read-only; returns structured data.
Free agent-service discovery, OpenAPI document checks, and receipt verification. No API key needed.
JSON Schema validation MCP.
npm MCP — wraps the npm Registry API (free, no auth)
JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)
mercury-number MCP — wraps StupidAPIs (keyless — no credential needed)
excuse MCP — wraps StupidAPIs (keyless — no credential needed)
chaos-index MCP — wraps StupidAPIs (keyless — no credential needed)
always-seven MCP — wraps StupidAPIs (keyless — no credential needed)
corporate-apology MCP — wraps StupidAPIs (keyless — no credential needed)
apology MCP — wraps StupidAPIs (keyless — no credential needed)
schrodingers-boolean MCP — wraps StupidAPIs (keyless — no credential needed)
ship-on-friday MCP — wraps StupidAPIs (keyless — no credential needed)
passive-aggression MCP — wraps StupidAPIs (keyless — no credential needed)
yc-rejection MCP — wraps StupidAPIs (keyless — no credential needed)
victorian-complaint MCP — wraps StupidAPIs (keyless — no credential needed)