[Quinn's Conveyance — Your API gets paid every time an AI agent calls it]
Quinn's Conveyance puts APIs behind HTTP 402 (the x402 protocol) so agents pay per call in USDC on Base — no API keys to issue, no signup forms, no cards, no invoicing, no billing stack to build. The wallet is the identity; the payment is the authorization.
This repo is the working proof: the live demo's source, and the SDK we ship to clients.
Live proof
- Demo — an MCP server with 5 paid tools at $0.005/call: demo.quinnsconveyance.com
- Insights — every challenge and settlement, public: demo.quinnsconveyance.com/insights
- Settlement proof — a real mainnet payment, settled via Coinbase CDP: Basescan
- Listings — Coinbase Bazaar + Agentic.market (all 5 tools), MCP Registry (
io.github.jkomalleyjr/quinns-conveyance), PayAI Bazaar
The SDK — quinns-x402
The same code the demo runs, packaged. Paywall an Express API or an MCP server in minutes:
What you get beyond the official @x402 packages:
- Dual facilitators — Coinbase CDP (JWT auth) or PayAI, one config line
- Discovery built in — Bazaar extension declared automatically; your endpoints index after their first paid call
- A settlement ledger — every 402 challenge and settlement in Postgres: payer wallet, amount, latency, conversion funnel
- Verification on every settlement — Flow Executor's 4 checks (signature, nonce, transfer log, validity window) recorded as
verify_status, fail-open-but-loud, with a delayed re-check that corrects propagation-race false failures
Full docs: sdk/README.md · npm: quinns-x402
How the demo works
demo/server.ts — an Express + MCP (StreamableHTTP) server. Paid calls flow: 402 challenge → EIP-3009 signed authorization → facilitator settlement on Base → response. Settlements are logged to Postgres, verified, and rendered on the public Insights dashboard. Payments settle directly to the operator's wallet — the service never holds funds.
Services
Pilot program (3 slots): free implementation + 90 days of Operate Insights, in exchange for a logo, a quote, and a case study with real numbers. Terms: sales/pilot-agreement.md · sales/pilot-offer.md
Writing
Principles
- No custody, ever. Settlements go straight to the API owner's wallet.
- Customer data is never sold. The settlement database exists to operate and improve the service — it is not a data product.
- Measure commerce, not transaction counts.
Contact
[email protected] · quinnsconveyance.com · X: @JkomalleyjrO