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, 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, read 4 Nov 2026. In PayPal agentic commerce services.
- Its agentic page says Checkout.com is directly integrated with ACP as a certified payment handler for ChatGPT. checkout.com, read 4 Nov 2026. In Checkout.com agentic commerce.
- 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, read 4 Nov 2026. In How an agent checkout actually flows, per protocol.
Nearby terms
Sources
- docs.stripe.com/agentic-commerce/protocols/ucp.md, read 4 Nov 2026
- developer.paypal.com/agent-ready/overview, read 4 Nov 2026
- checkout.com/agentic-commerce, read 4 Nov 2026
- UCP specification overview, read 4 Nov 2026
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