Axiom Relay

An x402 smart router for autonomous agents. Describe what you need; Axiom finds a provider that actually works, pays the seller directly, and returns the result.

What it does

Most x402 tooling assumes you already know the provider's URL. Axiom takes a capability instead. It searches x402 discovery catalogues, checks each candidate still answers a valid payment challenge, ranks them on price, observed reliability and latency, then buys from the best one. If that provider fails in a way that proves it took no payment, Axiom falls back to the next.

Pricing

The fee is a percentage below roughly $16.67 and flat above it, so a large purchase costs the same $0.50 whether it is $25 or $250.

Non-custodial by construction

The buyer signs two independent payment authorisations: one payable directly to the seller, one payable to Axiom. Axiom relays the seller's authorisation without modification and cannot alter its amount or destination. Seller funds never enter an Axiom address, and Axiom holds no signing key at all — it physically cannot move your money.

Quickstart

curl -sX POST https://axiom-relay.reference-seller.workers.dev/v1/route \
  -H 'content-type: application/json' \
  -d '{"capability":"crypto price","requirements":{"network":"eip155:8453"}}'

Returns ranked providers, the selection reason, and a signed quote. Sign it with the standard x402 SDK and post it to /v1/request.

Machine integration

Status

Live on Base mainnet, settling USDC through the Coinbase Developer Platform facilitator, x402 v2, exact scheme. Current status is always readable at /health.