Live on Flare mainnet & Coston2
A public x402 v2 facilitator for the Flare network — verification, gas-sponsored settlement, and the canonical Bazaar discovery registry. Free to use: no fee, no spread. Point a stock x402 SDK at the URL below and nothing else changes.
Your route answers with price, asset and network.
EIP-3009 transferWithAuthorization, or Permit2 where available.
POST /verify → POST /settleWe check nonce state and simulate, then broadcast and pay the gas.
Idempotent by payment-identifier; retries dedupe.
Finality
Flare's C-chain runs Snowman++, so acceptance is final and irreversible. We measured latest == safe == finalized on both networks — waiting for more blocks only adds latency.
Discovery
A neutral, public index of paid resources on Flare. Listings that settled through us carry a verifiable settlement count; directly-registered ones report null — never a misleading zero.
Cost
Payers sign; the facilitator broadcasts and sponsors the gas, bounded by per-payer and per-epoch ceilings enforced in Postgres so they hold across replicas.
How to use it
The four core endpoints are deliberately unmodified, so a stock x402 SDK works against us with only a URL swap. Flare-specific capability is additive — extra endpoints, extra extensions, never changed core semantics.
// npm i x402-express
import express from "express";
import { paymentMiddleware } from "x402-express";
const app = express();
app.use(paymentMiddleware(
"0xYourSellerAddress",
{
"GET /v1/quote": { price: "$0.01", network: "flare" },
},
{ url: "https://facilitator.route402.dev" },
));
app.get("/v1/quote", (_req, res) => res.json({ ok: true }));
app.listen(3000);With no signer configured the service still verifies payments and serves the registry; /settle reports settlement_unavailable.
API surface
/verify
Validate a payload against requirements. No gas.
/settle
Simulate, broadcast, wait for the receipt.
/supported
Networks, schemes and assets we settle.
/receipts/:paymentId
Look up a settlement after the fact.
/discovery/resources
Paginated Bazaar index. Cacheable, public.
/discovery/search
Full-text query across listings.
/discovery/register
List a resource. Open, unauthenticated, rate-limited.
/health · /metrics
Dependency checks and Prometheus counters.
Bazaar
Every listing below is one row of GET /discovery/resources. Provenance rides in extensions, so a client can tell a measured listing from a claimed one.
/v1/ftso/twap
Time-weighted FTSO price over any window
/v1/attest/evm-tx
FDC attestation request for an EVM transaction
/agent/summarize
Long-context document summarisation
/v1/blocks/finality
Finality proof for a Flare C-chain block
/market/orderbook
Aggregated DEX depth across Flare venues
Example listings, shown for shape. null means we cannot measure — it never reads as zero.
Where it runs
The EIP-712 domain of every settled asset is pinned, not discovered. DOMAIN_SEPARATOR is reconstructed at startup and the process refuses to boot on a mismatch.
eip155:14
eip155:114
Next on the path: FTSO price feeds for non-USD pricing, and FDC-attested receipts a counterparty can verify without trusting us. Both are interfaces today — nothing on the verify or settle path constructs them yet.
Public infrastructure for x402 on Flare — free to use, no fee, no spread.