Address entered by the payer
https://openpaymentaddress.org/protocol
Open standard · Independent repository
Protocol specification OPAP/1
The normative OPAP specification, JSON Schema, and portable conformance fixtures are maintained separately from this reference app. This app is an implementation and does not define the protocol.
Read the OPAP/1 specification See this page’s payment examplePayment address example
One address can point to another
This protocol page has its own payment address. It points to the main project address, which contains the current payment options. The payer’s app checks both addresses and shows the final recipient before anything continues.
Current payment address
https://openpaymentaddress.org/
Safe interactive example
See what the payer sees
See the payer follow this page to the project’s current payment options. We will fill in the example address for you. You can review the payment steps, but no real money will be sent.
Simulate this payment
Example address:
https://openpaymentaddress.org/protocol
Technical details for developers
Published payment file
OPAP Record
Payment apps derive this file’s location from the public payment address, verify it, and use it to present the available payment options. Visitors do not need to read or edit this code.
OPID
https://openpaymentaddress.org/protocol
{
"version": 1,
"id": "https://openpaymentaddress.org/protocol",
"revision": 1,
"issued_at": "2026-07-22T00:00:00Z",
"expires_at": "2030-01-01T00:00:00Z",
"payment": {
"type": "delegate",
"target": "https://openpaymentaddress.org/"
}
}