Tools

curl for gRPC: call any gRPC method with JSON, including bidirectional streaming, browse service definitions via server reflection, proto source files or protosets, with TLS and mutual TLS support.

Stripe's official CLI: forward and trigger webhook events locally, tail API request logs in real time, and create, read, update or delete Stripe objects to debug payment integrations. Needs a Stripe account; run stripe login first.

Postman's official MCP server: lets agents manage workspaces, collections, environments and API specs, help with API testing and generate client code from API definitions. The remote version uses OAuth; the local version needs a Postman API key.

Postman's official plugin: sets up the Postman MCP server so Claude Code can sync collections, run API tests and diagnose failures, generate client code, create mocks and docs, and run OWASP API security checks. Needs a Postman account.