# MCPJam/inspector

Testing and evaluation platform to chat, inspect, and debug MCP servers, MCP apps, and ChatGPT apps.

Repository: https://github.com/MCPJam/inspector
Canonical: https://ross.abutalabs.com/products/mcpjam-inspector
Homepage: https://www.mcpjam.com/
Language: TypeScript
License: NOASSERTION
License Family: other
Topics: mcp, modelcontextprotocol, mcp-clients, mcp-tools, opensource, chatgpt, mcp-apps, anthropic, cicd, debugger, evals, evaluation, inspector, mcp-inspector, mcp-server, oauth, oauth2, openai, openai-apps-sdk, tracing
Last push: 2026-08-26T20:55:43+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 33
- inputs: {"age_days": 467, "days_push": 7, "days_rel": 7, "gap_med": 0.0, "n_releases_24m": 199}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2172, forks 271 (observed 2026-08-28T04:06:21.883547+00:00)

## What it is
MCPJam is an open-source testing and evaluation platform for MCP server developers, providing an inspector playground, OAuth/EMA debugger, cross-client evals, CLI, and TypeScript SDK. It lets you chat with, inspect, and debug MCP servers across 16 client configurations and gate regressions in CI/CD.

## Use cases
- test and debug my MCP server tools
- run evals on MCP server tool calls
- debug OAuth flow for MCP server
- check MCP protocol conformance across clients
- gate MCP server regressions in CI
- inspect JSON-RPC messages from MCP server
- test MCP server with multiple LLM models

## When to choose
- you build MCP servers and need to test tools, prompts, and resources
- you need OAuth/EMA debugging for MCP auth flows
- you want eval gates in CI/CD for MCP server behavior
- you need cross-client compatibility checks (Claude, ChatGPT, Cursor)

## When to avoid
- you need a production MCP client for end users
- you don't work with MCP servers at all
- you need general-purpose LLM app testing outside MCP

## Facets
- artifact type: application
- maturity: active
- function: testing, mcp, llm-inference, auth, developer-tools, benchmarking, cli
- domain: developer-tools, artificial-intelligence, large-language-models, testing
- platform: cli, cross-platform
- tags: mcp-inspector, mcp-server-testing, oauth-debugging, evals, ci-cd-gates, agent-in-the-loop-evals, nodejs, web-server

## Member repositories
- MCPJam/inspector (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:21.883547+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:49:12.621765+00:00, confidence not recorded.
  - readme: https://github.com/MCPJam/inspector (fetched 2026-08-28T04:06:21.883547+00:00, sha ad039563db1b)
  - homepage: https://www.mcpjam.com/ (fetched 2026-08-29T10:29:41.009705+00:00, sha d9356b55bc60)
  - site_page: https://www.mcpjam.com/features/cross-client-testing (fetched 2026-08-29T10:29:41.020557+00:00, sha f9713c542b4d)
  - site_page: https://www.mcpjam.com/features/ci-cd-actions (fetched 2026-08-29T10:29:41.022309+00:00, sha 57f57cf63ed3)
  - site_page: https://www.mcpjam.com/features/cli (fetched 2026-08-29T10:29:41.024139+00:00, sha bf6c31ca37ad)
  - site_page: https://www.mcpjam.com/features/sdk (fetched 2026-08-29T10:29:41.026056+00:00, sha 309e84703b5c)
  - site_page: https://www.mcpjam.com/features (fetched 2026-08-29T10:29:41.014420+00:00, sha 57943e4728ec)
  - site_page: https://www.mcpjam.com/features/inspector (fetched 2026-08-29T10:29:41.016871+00:00, sha 564d11887c5b)
  - site_page: https://www.mcpjam.com/features/oauth-debugger (fetched 2026-08-29T10:29:41.018846+00:00, sha 5781cf2f7b24)
  - site_page: https://www.mcpjam.com/pricing (fetched 2026-08-29T10:29:41.028134+00:00, sha c20c936b0dab)
- Data as of 2026-08-30T08:39:29.467469+00:00.