---
title: "x402/MPP service discovery"
method: GET
path: "/v1/check"
---

# x402/MPP service discovery

`GET /v1/check`

## Request

- Base URL: `https://api.thoughtproof.ai`
- URL: `https://api.thoughtproof.ai/v1/check`
- Auth: none required

Returns x402-compatible 402 response for agent discovery. POST to /v1/check to run adversarial reasoning verification.

## Other responses

- `402`: Payment Required — x402 payment on Base (USDC)

---

[API](https://skmtc.dev/thoughtproof/apis/thoughtproof-reasoning-verification-api.md) · [All operations](https://skmtc.dev/thoughtproof/apis/thoughtproof-reasoning-verification-api/llms.txt) · [OpenAPI document](https://skmtc.dev/thoughtproof/apis/thoughtproof-reasoning-verification-api/revisions/53c58d95a03a?raw)