Agent Payments & Commerce Infrastructure · Node.js 18+
MCP Monetization Engine
Per-tool-call payments for MCP servers, with free quotas and a usage ledger.
Software catalog · Agent Payments & Commerce Infrastructure
Agent Payments & Commerce Infrastructure
Veyline Developer Primer
Charge AI agents per API call in USDC, using the x402 payment flow.
# example: the x402 flow, in one response $ curl -i https://api.example.com/report HTTP/1.1 402 Payment Required X-Payment: chain=base, asset=USDC # pay, retry, the route runs
Runs on: Node.js 18+ · Express · Version 1.0.1
Agent Payments & Commerce InfrastructureVeyline Developer PrimerCharge AI agents per API call in USDC, using the x402 payment flow.
The problem
Why this exists
APIs serving AI agents have no native way to charge per call. Bolting on accounts, API keys, and monthly billing does not fit machine customers that need to pay per request, in the request itself.
Who it is for
Built for
Developers monetizing an HTTP API used by AI agents or automated clients.
Capabilities
What it does
01
Express middleware that issues HTTP 402 challenges and verifies x402 payments before the route runs
02
Append-only usage ledger recording who paid for what
03
Non-custodial design: payments settle to your own wallet; the middleware never holds funds
Platforms & inputs
| Platforms | Node.js 18+ · Express |
|---|---|
| Works with | HTTP API routes in an Express application |
| Version | 1.0.1 |
| License | Single-seat perpetual, one-time purchase |
Documentation & support
Every purchase includes the product documentation. Support is by email: Support. Product terms are in the Terms and the machine-readable catalog.
Questions
Does the Primer custody payments?
No. It verifies x402 payments that settle to your own wallet. It is non-custodial and never holds funds.
What do I need to run it?
A Node.js 18+ Express application. You add the middleware to the routes you want to charge for.
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