modelcontextprotocol/inspector

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Visual testing tool for MCP servers

Stars: 10.9k
Forks: 1.5k
Open beginner issues: 0
Indexed issues: 51
Avg merge: 6h 17m
Merged PRs (30d): 151

Dominant language: TypeScript
License: No license data
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

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51 open issues indexed

Web client sends clientInfo.version as 0.0.0 instead of the Inspector package version Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

modelcontextprotocol/inspector#2445 · Opened Sep 20, 2026
Document the GitHub security advisory flow as a skill, and reconcile the two rules it contradicts Open

documentation v2

Difficulty 4/5 3-5 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2443 · 1 comment · Opened Sep 19, 2026
[Discussion] Proactively detect and surface server-side rate limiting Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#2442 · Opened Sep 18, 2026
[Discussion] Generate a mock MCP server from a recorded Inspector session Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/inspector#2441 · Opened Sep 18, 2026
[Discussion] Semantic/fuzzy tool search instead of exact-substring filtering Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/inspector#2440 · Opened Sep 18, 2026
[Discussion] Built-in load/concurrency test mode for stress-testing MCP servers Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/inspector#2439 · Opened Sep 18, 2026
Web client's backend server has no health/readiness endpoint Open

enhancement v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2438 · Opened Sep 18, 2026
No dedicated test fixture simulates a mid-session server crash/disconnect Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 68/100

modelcontextprotocol/inspector#2437 · Opened Sep 18, 2026
TUI has no in-app shortcut/keybinding help screen Open

enhancement v2

Difficulty 3/5 1-2 days Newbie friendliness 70/100

modelcontextprotocol/inspector#2436 · Opened Sep 18, 2026
CLI has no --quiet/--silent flag to suppress non-essential output Open

enhancement v2

Difficulty 3/5 1-2 days Newbie friendliness 65/100

modelcontextprotocol/inspector#2435 · Opened Sep 18, 2026
CLI has no shell completion (bash/zsh/fish) Open

enhancement v2

Difficulty 3/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/inspector#2434 · Opened Sep 18, 2026
CLI has no write path for the server catalog (add/remove/edit servers) Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

modelcontextprotocol/inspector#2433 · Opened Sep 18, 2026
TUI has no UI for Tasks, resource subscriptions, or Roots Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 48/100

modelcontextprotocol/inspector#2432 · Opened Sep 18, 2026
CLI has no way to export/save a tool call result to a file Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

modelcontextprotocol/inspector#2431 · Opened Sep 18, 2026
TUI has no search/filter for tools, resources, prompts, or skills lists Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/inspector#2430 · Opened Sep 18, 2026
Deep-link auth-token comparison in deepLink.ts isn't constant-time Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2429 · 1 comment · Opened Sep 18, 2026
Skills-verification budget-exceeded message names a `--method skills/get --uri` escape hatch with no test asserting it round-trips Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 74/100

modelcontextprotocol/inspector#2428 · 1 comment · Opened Sep 18, 2026
docs/mcp-app-review.md is a manual review checklist with no automated CI enforcement Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2426 · 1 comment · Opened Sep 18, 2026
dependabot-alerts.mjs's openAlerts() has no error handling for a rate-limited or partially-failed GitHub API response Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 74/100

modelcontextprotocol/inspector#2425 · 1 comment · Opened Sep 18, 2026
Docker HEALTHCHECK hardcodes 127.0.0.1 while HOST defaults to 0.0.0.0 Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/inspector#2424 · 2 comments · Opened Sep 18, 2026
CLI/TUI error output may not apply the same URL-redaction as the web client's OAuth timeout path Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/inspector#2423 · 1 comment · Opened Sep 18, 2026
Form-encoded secret masking can be defeated by an unescaped & inside the secret value itself Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 68/100

modelcontextprotocol/inspector#2422 · 2 comments · Opened Sep 18, 2026
TUI has no clipboard/copy affordance at all — no OSC 52 fallback for terminal copy Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#2421 · 1 comment · Opened Sep 18, 2026
Skills catalog budget setting has no CLI or TUI equivalent of the Web per-server setting Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 52/100

modelcontextprotocol/inspector#2420 · 1 comment · Opened Sep 18, 2026
Skills catalog byte/count budget is enforced per-server, not per-session across multiple connected servers Open

enhancement v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#2419 · 1 comment · Opened Sep 18, 2026
REQUEST_DEADLINES WeakMap in requestTimeout.ts has no test/assertion enforcing its one-entry-per-call invariant Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/inspector#2418 · 1 comment · Opened Sep 18, 2026
Dockerfile ENV defaults and docs/environment-variables.md can drift independently Open

documentation v2

Difficulty 3/5 1-2 days Newbie friendliness 74/100

modelcontextprotocol/inspector#2417 · 1 comment · Opened Sep 18, 2026
No visible test for Windows path separators in launcher/CLI argument forwarding Open

chore v2

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

modelcontextprotocol/inspector#2416 · 1 comment · Opened Sep 18, 2026
Docker HEALTHCHECK assumes --web unconditionally Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 65/100

modelcontextprotocol/inspector#2415 · 1 comment · Opened Sep 18, 2026
TUI has five exhaustive-deps-suppressed effects with no justification comment Open

chore v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2414 · 1 comment · Opened Sep 18, 2026
Same JSON-body pretty-print logic is duplicated verbatim in four places Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 75/100

modelcontextprotocol/inspector#2413 · 1 comment · Opened Sep 18, 2026
CLI's long-lived stream path can crash with an uncaught EPIPE Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

modelcontextprotocol/inspector#2412 · 1 comment · Opened Sep 18, 2026
exemptMcpEndpoint's URL/origin comparison has no property-based or fuzz test Open

chore v2

Difficulty 3/5 1-2 days Newbie friendliness 68/100

modelcontextprotocol/inspector#2411 · 1 comment · Opened Sep 18, 2026
CLI's open() call has no timeout, no catch, and no fallback message Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

modelcontextprotocol/inspector#2410 · 1 comment · Opened Sep 18, 2026
TUI real-terminal smoke test self-skips in CI — regressions ship with zero CI signal Open

chore v2

Difficulty 4/5 3-5 days Newbie friendliness 58/100

modelcontextprotocol/inspector#2408 · 1 comment · Opened Sep 18, 2026
TUI request/response body rendering has no size cap — risk of terminal hang on large payloads Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 68/100

modelcontextprotocol/inspector#2407 · 1 comment · Opened Sep 18, 2026
v2 ships with no LICENSE file, and four manifests declare plain MIT Open

chore v2

Difficulty 4/5 3-5 days Newbie friendliness 45/100

modelcontextprotocol/inspector#2406 · 1 comment · Opened Sep 18, 2026
--verify reports outcome "verified" and exits 0 for a skill whose resources are "dynamic", with nothing hashed Open

bug v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#2405 · 1 comment · Opened Sep 17, 2026
Modern skills/get results must carry ttlMs and cacheScope (ext-skills stable spec) Open

bug v2

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

modelcontextprotocol/inspector#2404 · 1 comment · Opened Sep 17, 2026
CLI and TUI advertise io.modelcontextprotocol/ui although they cannot render MCP Apps Open

bug v2

Difficulty 3/5 1-2 days Newbie friendliness 72/100

modelcontextprotocol/inspector#2403 · 1 comment · Opened Sep 17, 2026
docs: re-align the H2 2026 roadmap with the published MCP roadmap (2026-08-22) and official extensions Open

documentation v2

modelcontextprotocol/inspector#2400 · 1 comment · 1 assignee · Opened Sep 16, 2026
Drop the ext-apps#733 elicitation mirrors when the package ships a release containing it Open

chore mcp-apps v2 waiting on sdk

Difficulty 4/5 3-5 days Newbie friendliness 45/100

modelcontextprotocol/inspector#2360 · 3 comments · Opened Sep 13, 2026
Extract Tasks logic to dedicated wrapper SDK Open

blocked enhancement refactor v2 waiting on sdk

modelcontextprotocol/inspector#2316 · 2 comments · 1 assignee · Opened Sep 11, 2026
v1: automate npm deprecate in the main.yml publish job so v1 releases ship deprecated Open

chore CI v1

Difficulty 4/5 3-5 days Newbie friendliness 52/100

modelcontextprotocol/inspector#2104 · Opened Aug 24, 2026
[Blocked upstream] Tasks requests over Streamable HTTP omit the required Mcp-Name header (SEP-2663) Open

blocked bug spec compliance v2 waiting on sdk

modelcontextprotocol/inspector#1917 · 3 comments · 1 assignee · Opened Aug 4, 2026
Rich server configuration experience Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 30/100

modelcontextprotocol/inspector#1857 · 1 comment · Opened Jul 29, 2026
Investigate migrating from unmaintained tsup to tsdown Open

chore v2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

modelcontextprotocol/inspector#1492 · 1 comment · Opened Jun 15, 2026
Inspector mcpi client Open

cli enhancement v2

modelcontextprotocol/inspector#1432 · 3 comments · 1 assignee · Opened Jun 4, 2026
MCP Server Interface Diff Tool Open

enhancement v2

Difficulty 5/5 Over a week Newbie friendliness 28/100

modelcontextprotocol/inspector#1034 · 1 comment · 2 reactions · Opened Jan 22, 2026
MCP Apps Testing Spec Open

enhancement mcp-apps v2

Difficulty 5/5 Over a week Newbie friendliness 35/100

modelcontextprotocol/inspector#1026 · 3 comments · Opened Jan 19, 2026

modelcontextprotocol/inspector

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