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AI agent trust checker
Discovery gets agents to your door; identity, registration and payment let them act. One domain, ten checks across the manuals, cards and declarations agents verify before transacting.
Included in the free full scan — run this category alone when you only need these checks.
Checks site-wide files at the domain root — any page URL on the domain gives the same result.
One free scan of this category · anonymous preview · sign in to save the full report
What one scan checks here
Included in the scan above — open any check for the full criteria, evidence and fix notes.
- auth.md checker — See whether agents can find your registration path and scopes in auth.md.
- A2A agent card checker — See whether your Agent Card identifies your site to other agents over https.
- MCP server card checker — See whether agents can connect to your MCP server through a valid card.
- OAuth discovery checker — See whether agents can discover your OAuth endpoints from well-known metadata.
- OAuth protected resource checker — See whether your protected resources declare where tokens come from.
- ACP commerce checker — See whether your checkout is declared for agents in acp.json.
- AP2 payment checker — See whether your commerce profile declares AP2 payment mandates.
- MPP payments checker — See which endpoints declare machine payments and pair them with 402.
- UCP commerce checker — See whether agents can verify your commerce identity through a valid UCP profile.
- x402 payments checker — See which endpoints charge agents through 402 declarations.
Frequently asked questions
How do agents register and pay on my site?
Registration starts at auth.md or OAuth discovery metadata; identity is proven with A2A or MCP cards; paid steps are declared with 402 responses or a commerce profile extension.
What is the A2A agent card?
A JSON identity file at /.well-known/agent-card.json naming the agent, its skills and its endpoint. Agents read the card before first contact.
Do non-commerce sites need payment declarations?
No — a site with nothing to sell reports na on every payment check. Absence of a commerce file is not a violation.
What each check verifies, and what a failure looks like, lives in the checker library.