---
title: "Changes to POST /agent-commerce/acp/checkout_sessions/{id}"
method: POST
path: "/agent-commerce/acp/checkout_sessions/{id}"
---

# Changes to POST /agent-commerce/acp/checkout_sessions/{id}

`POST /agent-commerce/acp/checkout_sessions/{id}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 7 revisions.

- **2026-11-09** `5c50dd5066f8`: 2 breaking, 3 warning
- **2026-10-19** `8a0a695bcfb5`: 1 breaking, 3 info
- **2026-10-18** `4990dc8b3ef4`: 1 info

## Changes

- **2026-11-09** `5c50dd5066f8`: 2 breaking, 3 warning
  - added the pattern `^(?:[A-Za-z0-9_'+\-]+\.)*[A-Za-z0-9_'+\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\-]*\.)+[A-Za-z]{2,}$` to the request property `buyer/email`
  - added the pattern `^(?:[A-Za-z0-9_'+\-]+\.)*[A-Za-z0-9_'+\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\-]*\.)+[A-Za-z]{2,}$` to the request property `fulfillment_details/email`
  - the `line_items/items/unit_amount` request property's max was set to `9007199254740991.00`
  - the `metadata/mondoir/editionNumber` request property's max was set to `9007199254740991.00`
  - the `metadata/mondoir/editionNumbers/items/` request property's max was set to `9007199254740991.00`
- **2026-10-19** `8a0a695bcfb5`: 1 breaking, 3 info
  - the `metadata/mondoir/payer` request property type changed from `string` to no type
  - added the new optional request property `metadata/mondoir/network`
  - added `subschema #1, subschema #2` to the `metadata/mondoir/payer` request property `anyOf` list
  - removed the pattern `^0x[0-9a-fA-F]{40}$` from the request property `metadata/mondoir/payer`
- **2026-10-18** `4990dc8b3ef4`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/mondoir/apis/mondoir-api/docs/agent-commerce/acp/checkout_sessions/:id/post.md) - [API](https://skmtc.dev/mondoir/apis/mondoir-api.md) - [Page](https://skmtc.dev/mondoir/apis/mondoir-api/changes/agent-commerce/acp/checkout_sessions/:id/post)