# Request for review: x402 "exact" scheme on ICP

**URL:** <https://forum.dfinity.org/t/request-for-review-x402-exact-scheme-on-icp/59359>\
**Category:** Developers\
**Tags:** Discussing\
**Created:** [October 29, 2025, 12:10pm UTC](https://forum.dfinity.org/t/request-for-review-x402-exact-scheme-on-icp/59359 "2025-10-29T12:10:45Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![marceljuenemann](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/marceljuenemann/32/31044_2.png) [@marceljuenemann](https://forum.dfinity.org/u/marceljuenemann)\
**Post date:** [January 8, 2026, 10:35am UTC](https://forum.dfinity.org/t/request-for-review-x402-exact-scheme-on-icp/59359/21 "2026-01-08T10:35:56Z")

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I just came across [ICPay](https://forum.dfinity.org/t/announcing-icpay-new-payment-processor-built-on-the-ic/57553), which seems to already support x402 Ethereum payments on ICP.

@icpay I can’t find much in the docs about how ICPay works under the hood and code seems to be closed source? Are you using threshold signing to submit transactions or how does it work? I guess ICPay has custody of user funds?

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