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TinyFn

Hosts 500 deterministic utility functions over MCP and REST so AI agents compute math, conversions and validations exactly rather than estimating them.

Free plan · From $9/moActively maintained

Developer toolsFor developersFree tier
tinyfn.io ↗
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At a glanceswept Oct 22, 2026

≈ 561visits/mo

Little sign of use · estimate, read Oct 13, 2026

For
Developers giving AI assistants like Claude or Cursor deterministic math, conversion and validation tools via MCP
Price
Free plan · From $9/mopricing page, read Oct 17, 2026
Activity
Actively maintainedsite updated 8 weeks ago
Runs as
API
Used for
  • count letters in text precisely
  • convert units without relying on model guesses
  • validate email addresses, URLs and UUIDs
read off tinyfn.io on Oct 17, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 17, 2026

Free plan · From $9/mo

pricing page

Your datawhat they publish, each line with its page · read Oct 17, 2026

These are TinyFn'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 17, 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.

Most used in Developer toolsby use, among tools still maintained — this tool shares no tags yet

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

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Questions this page answers
  • What is TinyFn?

    Hosts 500 deterministic utility functions over MCP and REST so AI agents compute math, conversions and validations exactly rather than estimating them. It is listed in the Atlas under Developer tools.

  • Who is TinyFn for?

    Developers giving AI assistants like Claude or Cursor deterministic math, conversion and validation tools via MCP

  • How much does TinyFn cost?

    TinyFn has a free plan; paid plans start at $9/mo, per its pricing page on 2026-10-17.

  • Is TinyFn free?

    Yes, TinyFn has a free plan, per its pricing page on 2026-10-17.

  • Do people use TinyFn?

    Little sign of use: ≈ 561 visits/mo · estimate, 2026-10.

  • Is TinyFn still maintained?

    Actively maintained: site updated 8 weeks ago.

  • Is TinyFn safe?

    We do not audit vendors. What TinyFn publishes, read 2026-10-17: GDPR stated on its privacy policy.

  • How do I cancel TinyFn?

    In its own words (terms of service, 2026-10-17): “You may cancel your account at any time.”

  • Does TinyFn give refunds?

    In its own words (terms of service, 2026-10-17): “All fees are non-refundable except as required by law.”

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