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Ontario Protocol

Checks whether a paid x402 API endpoint is readable, challenges correctly, and discoverable before an agent signs a payment.

Actively maintained

At a glanceswept Oct 23, 2026

not read yet

Use

For
Builders of paid x402 API endpoints checking why AI agents aren't buying them
Activity
Actively maintainedsite updated 8 days ago
Company
since 2025per their site
Runs as
API
Used for
  • check a paid endpoint's x402 payment readiness before listing
  • find the first blocker stopping agents from paying
  • compare endpoint readiness against an agent spend policy
read off ontarioprotocol.com on Oct 24, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 24, 2026

Price not read

The companyeach fact with its source · read Oct 24, 2026
How a program reaches itfound, not claimed · read Oct 24, 2026
  • MCP servercom.ontarioprotocol/ontario-protocolverified in the MCP registry
  • Stateanswers, 17 toolschecked 2026-10-24
  • Address to connectontarioprotocol.com/mcp
  • OpenAPI spec17 pathsthe spec ↗
  • MCP docsontarioprotocol.com/tools/agent-catalog-readinessthe vendor's page ↗

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 Ontario Protocol?

    Checks whether a paid x402 API endpoint is readable, challenges correctly, and discoverable before an agent signs a payment. It is listed in the Atlas under Developer tools.

  • Who is Ontario Protocol for?

    Builders of paid x402 API endpoints checking why AI agents aren't buying them

  • Do people use Ontario Protocol?

    Little sign of use.

  • Is Ontario Protocol still maintained?

    Actively maintained: site updated 8 days ago.

  • What are alternatives to Ontario Protocol?

    In Developer tools, by use: Formcarry, Ontonym, Fuse Network, Trail Fortress, Pactum AI, Manifest.

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