---
title: "Payment handler, defined | Agent Ready Checkout"
description: "Payment handler: In UCP, a named entry in the payment_handlers registry that tells the platform how to collect and pass payment for that business."
canonical: https://agentreadycheckout.com/glossary/payment-handler
site: "Agent Ready Checkout"
last_updated: 2026-11-04
section: "Glossary"
---

# Payment handler, defined | Agent Ready Checkout

> Payment handler: In UCP, a named entry in the payment_handlers registry that tells the platform how to collect and pass payment for that business.

Source: https://agentreadycheckout.com/glossary/payment-handler
Site: Agent Ready Checkout
Last reviewed: 2026-11-04

Glossary

# Payment handler

In short

Payment handler: In UCP, a named entry in the payment\_handlers registry that tells the platform how to collect and pass payment for that business. Payment handler appears in 3 sourced facts on this site, the first in PayPal agentic commerce services. Example: Stripe offers a Stripe Payments handler for UCP checkouts. After Payment handler the glossary lists Link Agent Wallet.

## Definition

In UCP, a named entry in the payment\_handlers registry that tells the platform how to collect and pass payment for that business.

## Example

Stripe offers a Stripe Payments handler for UCP checkouts. [docs.stripe.com](https://docs.stripe.com/agentic-commerce/protocols/ucp.md), read 4 Nov 2026.

## Where it appears in the sourced facts

-   Agent Ready supports UCP for Google AI Mode and Gemini via a Google Pay payment handler, through Braintree or through PayPal's Orders v2 API. [developer.paypal.com](https://developer.paypal.com/agent-ready/overview), read 4 Nov 2026. In [PayPal agentic commerce services](https://agentreadycheckout.com/processors/paypal).
-   Its agentic page says Checkout.com is directly integrated with ACP as a certified payment handler for ChatGPT. [checkout.com](https://www.checkout.com/agentic-commerce), read 4 Nov 2026. In [Checkout.com agentic commerce](https://agentreadycheckout.com/processors/checkout-com).
-   UCP: the business publishes a profile at /.well-known/ucp; the platform sends its own profile URI in the UCP-Agent header; capabilities are negotiated and a payment handler is chosen from the payment\_handlers registry. [ucp.dev](https://ucp.dev/latest/specification/overview/), read 4 Nov 2026. In [How an agent checkout actually flows, per protocol](https://agentreadycheckout.com/guides/how-an-agent-checkout-flows).

## Nearby terms

-   [Link Agent Wallet](https://agentreadycheckout.com/glossary/link-agent-wallet)
-   [Merchant of record](https://agentreadycheckout.com/glossary/merchant-of-record)
-   [Delegated payment](https://agentreadycheckout.com/glossary/delegated-payment)
-   [All terms](https://agentreadycheckout.com/glossary)

## Sources

1.  [docs.stripe.com/agentic-commerce/protocols/ucp.md](https://docs.stripe.com/agentic-commerce/protocols/ucp.md), read 4 Nov 2026
2.  [developer.paypal.com/agent-ready/overview](https://developer.paypal.com/agent-ready/overview), read 4 Nov 2026
3.  [checkout.com/agentic-commerce](https://www.checkout.com/agentic-commerce), read 4 Nov 2026
4.  [UCP specification overview](https://ucp.dev/latest/specification/overview/), read 4 Nov 2026

Last reviewed 4 Nov 2026

## Edition

Matrix edition of 4 Nov 2026.

Reviewed 4 Nov 2026, [4 sources](#sources-h).

## Method

[How cells, sources and read dates are defined](https://agentreadycheckout.com/method)