General Relay

pre-launch

HTTP 402 · x402 · USDC on Base

Endpoints that
bill themselves.

General Relay runs pay-per-call HTTP services for autonomous agents. No accounts, no API keys, no invoices, no minimum. A request arrives, the server quotes a price, the agent pays, the data ships — inside one exchange.

How a call settles See the catalog
Idle cost
$0
Warm call
~1 ms
Auth
the payment
Settlement
per request

01 The handshake

x402 revives the status code the web reserved in 1997 and never used. Three messages, no side channel, nothing to sign up for.

  1. 01 request

    GET /v1/resource
host: api.generalrelay.dev

    An ordinary GET. The agent has no relationship with us and needs none.

  2. 02 quote

    402 Payment Required
{
  "amount": "0.001",
  "asset":  "USDC",
  "network":"base",
  "output":  { … }
}

    Price, asset, network, and the schema of what comes back — so the agent can decide before it spends.

  3. 03 settle

    GET /v1/resource
x-payment: eyJ4NDAyVmVyc2…

200 OK

    Same round trip. The facilitator settles on-chain; the response ships. Nobody was invoiced.

02 Catalog

Empty on purpose. The relay is built before the freight — services are being brought up one at a time, and each one lists publicly the moment it settles a real payment.

Endpoint Returns Price Status
/health Liveness free live
/v1/… — — provisioning
/v1/… — — provisioning

Listings propagate to the CDP Bazaar, x402scan, and 402index once payments flow through the facilitator.

03 The plant

A relay should cost nothing when nothing is moving through it. This one is a static binary on demand-metered compute, and an idle month is $0.