Merchant Payment Protocol (MPP)
MPP exposes merchant payment capabilities to agents.
- Category
- Commerce
- Standard
- Emerging checkEmerging
- Off by default, turn on in settings
What it checks
MPP describes what a merchant accepts and how an agent can pay, so the agent can settle a purchase without a person filling in a checkout form.
The extension requests /.well-known/mpp.json and /.well-known/merchant-payment-protocol, in that order, and passes on the first one that
returns a non-empty JSON document.
Commerce protocols are new, and most sites have no reason to support them, so absence is N/A rather than a failure.
Results
| Status | When |
|---|---|
| Pass | One of the paths returns a non-empty JSON document |
| N/A | Nothing was found |
How to fix
If you sell to agents, publish an MPP descriptor at /.well-known/mpp.json advertising your payment capabilities. Serve it as JSON (Content-Type: application/json); the extension only
confirms a JSON document is there and does not validate its contents.
These standards are still settling, so follow the protocol’s own documentation for what the descriptor should contain.