---
title: "Validate service listing payload"
method: POST
path: "/api/x402/list-service/validate"
---

# Validate service listing payload

`POST /api/x402/list-service/validate`

Free payload validator for /api/x402/list-service. Set verify_now=true to also run readiness verification and receive a grade-aware provider_publication purchase request. Does not charge, settle, or store a listing.

## Request body

- object
  - `description` string, required
  - `endpoint` string, uri, required
  - `method` string
  - `name` string, required
  - `network` string
  - `owner_contact` string
  - `owner_url` string, uri
  - `price_usdc` string, required
  - `tags` string[]
  - `verify_now` boolean — Run the free readiness verifier, persist the signed public report, and return the exact paid publication handoff without storing a listing.

## Response `200`

Payload is valid; response includes provider_publication and optional verification evidence

## Other responses

- `400` — Payload has validation errors

---

[API](https://skmtc.net/ontarioprotocol/apis/ontario-protocol-x402-api.md) · [All operations](https://skmtc.net/ontarioprotocol/apis/ontario-protocol-x402-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/ontarioprotocol/ontario-protocol-x402-api/revisions/54384a1c4bf3/schema)