Toolpin

Every public MCP server. Watched.

Toolpin catalogs every server in the official MCP registry, probes the reachable ones daily, and pins a cryptographic hash of each tool definition, so when a server you depend on silently changes what its tools claim to do, it shows here first.

Looking for a capability rather than a name? Search the tool index by what you need done.

current spec The 2026-07-28 revision is current. The largest version bump since MCP launched: the initialize handshake is removed, Mcp-Session-Id is eliminated, and new routing headers are mandatory. Nearly every remote server we probe is still on an older revision. Check yours in seconds. Run the check → MCP Your agent can ask us directly. Toolpin runs an MCP server, so an agent choosing which server to install can check whether it answers, what its tools claim, and whether that claim has changed lately. There is a JSON API too. Both open without an account. API & MCP →

Right now catalog refreshed 12 hours ago

25,277
Servers cataloged
14,532
Remote endpoints watched
60,381
Tool definitions pinned
51,189
Changes detected
Watch the servers you depend on. Daily checks, a pinned hash of every tool definition, and an email the moment one changes. Free for your first server. See pricing →

Recent observations

When (UTC)ServerEvent
Aug 27 06:14 io.github.blackboxfoundry/livedatalink tools changed
Aug 27 06:14 io.github.pipeworx-io/hi-dmv tools changed
Aug 27 06:14 ch.opencaselaw/swiss-caselaw tools changed
Aug 27 06:14 com.getboxkite/xero-backup-export tools changed
Aug 27 06:14 store.scvd/general-store tools changed
Aug 27 06:14 global.rootz.food/grocery back online
Aug 27 06:14 markets.oblique.api/oblique-markets tools changed
Aug 27 06:13 io.github.cammac-creator/ibanforge tools changed
Aug 27 06:13 io.github.pipeworx-io/ny-dmv tools changed
Aug 27 06:13 io.github.pipeworx-io/ca-grants tools changed
Aug 27 06:13 io.github.pipeworx-io/eu-funding-tenders tools changed
Aug 27 06:13 io.github.pipeworx-io/ca-dmv tools changed
Aug 27 06:13 io.github.pipeworx-io/wi-dmv tools changed
Aug 27 06:13 io.github.pipeworx-io/nihr tools changed
Aug 27 06:13 io.github.ebrunet001/mcp-server-tft went unreachable

Most-starred monitored servers

ServerStarsStatus
com.browser-use/browser-use 110,297 not yet probed
app.worldmonitor/mcp 84,436 reachable
io.github.netdata/mcp-server 80,301 auth required
io.github.IncorporatedPartners/labelhead-artist-momentum 79,456 reachable
io.github.D4Vinci/Scrapling 75,942 not yet probed
io.github.upstash/context7 61,060 not yet probed
io.github.tldraw/tldraw 49,900 reachable
io.github.tldraw/tldraw 49,900 reachable
io.github.ChromeDevTools/chrome-devtools-mcp 49,589 not yet probed
io.github.metabase/mcp 48,911 blocked
com.puter/mcp-server 43,180 auth required
io.github.amruthpillai/reactive-resume 41,615 auth required
io.github.DeusData/codebase-memory-mcp 39,961 not yet probed
io.github.PostHog/mcp 38,794 error
io.github.PostHog/mcp 38,794 auth required
io.github.bytedance/mcp-server-commands 38,705 not yet probed
io.github.bytedance/mcp-server-browser 38,705 not yet probed
io.github.bytedance/mcp-server-search 38,705 not yet probed
io.github.bytedance/mcp-server-filesystem 38,705 not yet probed
io.github.microsoft/playwright-mcp 36,516 not yet probed