Problem
An AI agent can call an API but cannot pay for a single request. Every paid service assumes a human with a card, an account and a checkout page — so agents are stuck behind free tiers or pre-issued keys.
What we built
Standalone service exposing Tunelo products to agents through two doors: an MCP billing surface over Industrial Hub (list invoices, fetch a hosted payment link, subscription status, scoped per tenant by a token the tenant mints), and two x402-metered HTTP endpoints priced per call — SA public tenders at $0.02 and an SA crypto-tax estimate at $0.005 — settling USDC on Polygon through the hosted facilitator at zero fees. Receive-only wallet; the gateway never holds a private key.
Result
Live on Polygon mainnet since 10 July 2026. The full agentic loop is proven end-to-end in production, not on a testnet: HTTP 402 challenge, gasless EIP-3009 signature, facilitator settles, real USDC received. Listed in the public x402 directories. Pilot stage — the rails are proven and organic demand for paid agent calls is still early.