x402basequality 0.40

Send a 1 USDC tip on Base via x402 payment protocol to a specified wallet address.

Price
1.00 USDC / call
Protocol
x402
Verified
no
Endpoint
https://x402-poc.vercel.app/api/0x0806D3920dAFd50e8cEb189c82D2d3a217e2A045/coffee

What it does

This x402 endpoint allows agents or users to "buy a coffee" for the wallet address 0x0806D3920dAFd50e8cEb189c82D2d3a217e2A045 by making a micropayment of 1 USDC (1,000,000 units at 6 decimals) on the Base network. The endpoint uses the x402 payment protocol (version 1) with the "exact" payment scheme, meaning the caller must attach an X-PAYMENT header with a valid payment proof before the resource will return its JSON response.

The hosting application at x402-poc.vercel.app is a proof-of-concept platform that lets users create x402-based tip links. Each link is a paywall-gated GET endpoint tied to a specific Ethereum address. The payment is routed to the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base. The maximum timeout for payment settlement is 300 seconds.

Documentation is minimal — the site offers only a landing page with a "Create Tip Link" flow and no API docs, pricing page, or README. The endpoint itself is live and returns a well-formed 402 challenge, but there is no information about what the successful response body contains beyond the declared mimeType of application/json.

Capabilities

x402-paymentusdc-micropaymentbase-networktip-jarexact-schemeevm-wallet-payment

Use cases

  • —Agents tipping or donating to a specific Ethereum wallet via USDC on Base
  • —Programmatic micropayments as part of an automated workflow
  • —Demonstrating x402 protocol integration for proof-of-concept applications

Fit

Best for

  • —Sending small USDC tips to a known wallet address on Base
  • —Testing x402 payment protocol client implementations
  • —Agent-initiated crypto micropayments

Not for

  • —Variable-amount or subscription-based payments (fixed 1 USDC exact scheme only)
  • —Non-Base-network or non-USDC payment flows
  • —Production-grade payment infrastructure (this is a proof-of-concept)

Quick start

curl -X GET \
  -H "X-PAYMENT: <your-x402-payment-proof>" \
  https://x402-poc.vercel.app/api/0x0806D3920dAFd50e8cEb189c82D2d3a217e2A045/coffee

Endpoint

URLhttps://x402-poc.vercel.app/api/0x0806D3920dAFd50e8cEb189c82D2d3a217e2A045/coffee
Transporthttp
Protocolx402
Pay to0x0806D3920dAFd50e8cEb189c82D2d3a217e2A045
CurrencyUSD COIN

Quality

0.40/ 1.00

The endpoint is live and returns a well-formed x402 challenge with clear payment parameters (1 USDC on Base, exact scheme). However, there are no docs, no OpenAPI schema, no examples of successful responses, and the hosting site is explicitly a proof-of-concept with minimal information.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README all return 404.
  • —This is a proof-of-concept (x402-poc) deployment, not a production service.
  • —Successful response body structure is unknown; only mimeType application/json is declared.
  • —The endpoint is tied to a single hardcoded wallet address.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:31:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/DQfJwr
Send a 1 USDC tip on Base via x402 payment protocol to a specified wallet address. — Clawmart · Clawmart