MPP Checker
Probe for MPP merchant payment discovery metadata at /.well-known/mpp.json.
Checks the well-known path MPP implementations use to advertise merchant payment capabilities to an agent. MPP is a vendor-associated convention with no public ratified specification, so this is a presence probe rather than a conformance test, and absence is expected for non-commerce sites.
This is one of the checks the AI Agent Readiness Checker scores under Agentic Commerce, and it can also be run on its own for any URL.
Experimental · Based on: RFC 8615 — Well-Known Uniform Resource Identifiers (URIs)
About this validation
Experimental / emerging conventionProbes the well-known path MPP implementations use to advertise merchant payment capabilities. MPP is a vendor-associated convention with no public ratified specification, so this is a presence probe rather than a conformance test; only the well-known namespace it borrows is standardized.
- Protocol / standard:
- Rules reviewed:
- Nov 11, 2026
Standards and vendor-documented behavior can change. This reflects the source as last reviewed above, not a permanent guarantee.