APIs that AI agents can find, use, and pay
mpp.land is the open registry for the Machine Payments Protocol, a standard that lets software pay for API calls at the HTTP layer. No API keys, no accounts, no vendor lock-in.
105
services indexed
105
reachable now
430ms
median response
Explore the registry
Search 105 services by category, method, and compliance grade
Why MPP?
The case for machine-native payments and what it changes
Protect your agents
Free budget controls, response previews, and reliability routing via use.mpp.land
How it works
1
Discover
Service publishes an OpenAPI spec with x-payment-info on each paid endpoint.
2
Challenge
Client calls the endpoint, gets a 402 Payment Required response with payment details.
3
Pay
Client submits payment proof in the next request. Service verifies and responds with data.