---
title: "x402 Deferred-Scheme Handshake Validator"
method: POST
path: "/v1/tools/validate_x402_deferred_handshake"
tags: ["TODO_TAGS_REVIEW", "TODO_AP2_EXPORT_REVIEW"]
---

# x402 Deferred-Scheme Handshake Validator

`POST /v1/tools/validate_x402_deferred_handshake`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/validate_x402_deferred_handshake`
- Auth: none declared

Validates a Cloudflare `deferred` x402 scheme handshake: 402 offer field shape (scheme:"deferred", id, termsUrl), RFC 9421 HTTP Message Signature covered-component coverage (@method, @target-uri, content-digest), and settlement-reference id continuity across a call sequence (uniqueness, no internal duplicates). Cryptographic signature verification reuses verify_webbotauth_signature (art-129); rollup/batch settlement arithmetic is owned by reconcile_x402_batch_settlement (art-61); this node validates the offer and handshake shape only. Scheme registry is a plugin surface and is not hard-coded.

**Tool URL:** https://ainumbers.co/chaingraph/art-394-x402-deferred-handshake-validator.html

## Request body

- object
  - `covered_components` unknown
  - `id_continuity` unknown
  - `offer` unknown

## Response `200`

Successful tool execution result

- object
  - `errors` integer
  - `findings` object[]
    - `level` string
    - `msg` string
  - `passes` integer
  - `required_covered_components` string[]
  - `scope_note` string
  - `score` integer
  - `settlement_reference_id` string
  - `verdict` string
  - `warnings` integer

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)