---
title: "On-chain USDC payment ledger"
method: GET
path: "/v5/payment-proof"
tags: ["Payment"]
---

# On-chain USDC payment ledger

`GET /v5/payment-proof`

## Request

- Base URL: `https://headlessoracle.com`
- URL: `https://headlessoracle.com/v5/payment-proof`
- Auth: none declared

Public. Returns lifetime x402 payment stats from KV: count, first/last payment timestamps, Base mainnet USDC contract and verify link.

## Response `200`

Payment proof

- object
  - `payment_count` integer
  - `first_payment_at` string, nullable
  - `first_payment_tx` string, nullable
  - `last_payment_at` string, nullable
  - `network` string
  - `asset` string
  - `contract` string
  - `verify_at` string

---

[API](https://skmtc.dev/headlessoracle/apis/headless-oracle.md) · [All operations](https://skmtc.dev/headlessoracle/apis/headless-oracle/llms.txt) · [OpenAPI document](https://skmtc.dev/headlessoracle/apis/headless-oracle/revisions/4e82fe332f29?raw)