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Toolpin

Probes public MCP servers daily and pins hashes of their tool definitions to flag silent changes.

Free plan · From $9/moActively maintained

Developer toolsMonitoringFree tier
toolpin.dev ↗
Open toolpin.devAlternativesSet it up for my teamIs Toolpin yours? Claim the card →
At a glanceswept Oct 24, 2026

not read yet

Use

For
Developers and teams who depend on public MCP servers and need to know when their tool definitions change
Price
Free plan · From $9/mopricing page, read Oct 26, 2026
Activity
Actively maintainedsite updated 2 days ago
Company
Toolpin LLC · Domain since 2026site footer · domain registered
Runs as
API
Used for
  • Check whether a public MCP server's tools have changed
  • Get alerted when a watched server goes unreachable or recovers
  • Verify an MCP server's tool claims before installing it
read off toolpin.dev on Oct 26, 2026
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
Pricingpricing page, read Oct 26, 2026

Free plan · From $9/mo

pricing page

Your datawhat they publish, each line with its page · read Oct 26, 2026

These are Toolpin's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 26, 2026

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is Toolpin?

    Probes public MCP servers daily and pins hashes of their tool definitions to flag silent changes. It is listed in the Atlas under Developer tools and made by Toolpin LLC.

  • Who is Toolpin for?

    Developers and teams who depend on public MCP servers and need to know when their tool definitions change

  • How much does Toolpin cost?

    Toolpin has a free plan; paid plans start at $9/mo, per its pricing page on 2026-10-26.

  • Is Toolpin free?

    Yes, Toolpin has a free plan, per its pricing page on 2026-10-26.

  • Do people use Toolpin?

    Little sign of use.

  • Is Toolpin still maintained?

    Actively maintained: site updated 2 days ago.

  • Who owns Toolpin?

    Toolpin is run by Toolpin LLC, per its site footer (2026-10-26).

  • What are alternatives to Toolpin?

    In Developer tools, by use: UptimeRobot, Hyperping, Checkly, The Best API Documentation Tool, Offendersearch, Prostack.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk