MCPJam features
Everything MCPJam does to help you trust your MCP server: inspector, OAuth debugging, JSON-RPC logging, evals, and more.
MCPJam Inspector
Open-source playground for MCP servers: connect a server, run its tools, compare multiple models side by side, and read the full waterfall trace. Free, npx-installable.
MCP OAuth & EMA debugger
The MCP OAuth Debugger visualizes every step of the auth flow so you see exactly where it breaks, with spec conformance checks and an EMA debugger for enterprise Cross-App Access.
Cross-client testing
Generate an eval suite from your MCP server's tools, run it with a real model, and get accuracy, latency, and diagnosed failure patterns, not only protocol checks.
CI/CD actions
Gate every PR on how models use your MCP server. Wire MCPJam evals into GitHub Actions, track accuracy over time, and catch behavior regressions early.
Test Agent Skills + MCP locally
Load Anthropic Agent Skills alongside your MCP servers and watch a real model use both. Skills viewer plus an LLM playground, running locally with one npx command.
Chatboxes
Hosted, shareable UAT environments that mirror the major AI hosts. Testers break things safely, and their sessions become replayable regression tests.
Synthetic acceptance testing with Swarm
Turn loose AI personas that act like your users to acceptance-test your MCP server at scale, with multi-turn journeys across every client, before launch.