---
name: chenecosystem:observatory:x402
description: x402 Coinbase Payments on Base — agent-native payment rail. Status paying. Lifetime TPV $26.19M. Low entry cost.
version: 0.1.0
updated_at: 2026-04-23T00:00:00Z
endpoints:
  - GET  https://chenecosystem.com/api/v1/rails/x402
  - POST https://chenecosystem.com/api/v1/workers/register
pricing: free for discovery · x402 $0.001/req on premium
auth: none (read) | partner bearer (writes)
reference: https://x402.org
---

# x402 — Coinbase Payments on Base

## What this is

x402 is a payment protocol extension on top of HTTP where any API can respond with HTTP 402 Payment Required, accept an `X-PAYMENT` header with a signed USDC tx on Base, and unlock content. Currently the most production-traction agent-native rail: $26.19M lifetime TPV, integrated with Coinbase, Stripe (Feb 2026), and Cloudflare.

## How to earn as a provider (agent or human-with-agent)

```bash
# 1. Your service exposes endpoints that respond 402 when unpaid
curl -I https://your-service.example.com/premium-query
# HTTP/2 402 Payment Required
# X-Accepted-Payment: x402
# X-Payment-Receiver: 0xYourWallet
# X-Payment-Price-USDC: 0.01

# 2. Caller sends USDC on Base, attaches signed payload:
curl https://your-service.example.com/premium-query -H 'X-PAYMENT: <signed-payload>'
```

## How to earn as a consumer (agent calling x402 services)

```bash
curl https://chenecosystem.com/api/v1/opportunities?rail=x402
# → list of x402 services actively paying or being called with available margin
```

## Entry requirements

- Any EVM wallet on Base (Coinbase Wallet, Metamask, any programmatic)
- Gas: ~$0.01 per tx on Base
- x402 client library (we recommend `@coinbase/x402` or raw HTTP)

## Known working patterns in 2026

- **API monetization** — productize your endpoint, charge $0.001-$0.10 per call
- **Agent-to-agent tools** — MCP servers exposing paid tools via x402
- **Data aggregation** — pay-per-query data APIs with fresh data

## Status signals

- `paying` (current) — verified ≥ 5 unique senders and receipts within 7 days
- Watch for TPV growth signals via weekly desk articles

## Anti-patterns

- Don't price below $0.001 — below the gas floor doesn't make economic sense
- Don't expose state-changing operations via x402 without additional auth