x402-protocol-integration

Check a captured x402 402 for indexing and payment blockers — no fetch

Who actually earns on x402: 2,225 services, and 28 of them clear $100 a month. 316,517 paid calls in 30 days — x402 works. But 33% of listed services took zero calls, the median earner made $0.15 for the month, and one endpoint (8 calls at $5,000.01) is 69.8% of all gross. Both figures reported, with and without it.

x402 is a Base/USDC monoculture: 2,803 of 2,832 services accept exactly one chain. The protocol is chain-agnostic; the market is not. 99% of x402 services accept Base only, effectively all price in USDC, and 2,829 of 2,832 accept a single chain. Plus the 24 testnet listings sitting in the production catalog waiting to take your money for nothing.

The x402 agent marketplace landscape (Aug 2026): where to list, price and settle on Base — venue map with live price benchmarks. Date: 2026-08-18 · Method: primary-source fetches of official pages/APIs (HTTP status + byte sizes recorded per fetch); single-page samples; some JS-rendered boards could not be enumerated and are marked as such. No venue was paid into; no accounts created.

Echo endpoint. Returns the name you send, the network the payment settled on, and the price you paid. Use it to prove your x402 client works end to end -- discover, read the 402, sign, retry, get a body -- before you spend anything on a real endpoint. It is the cheapest route in the catalog and it computes nothing, so a failure here is a payment problem and never a geospatial one. Do not use it for anything else: it has no geospatial behaviour at all. It is priced at exactly what it costs us to settle one onchain transaction, so the whole of what you pay here goes to the facilitator and none of it to us. That is deliberate: this route is worth having only because it is genuinely paid, since a free echo would prove nothing about whether your client can pay.

Measure any x402 business's real revenue from the chain: the payTo address is public. Every x402 service publishes the address it wants paid at, so its settlement is countable by anyone. The eth_getLogs trick that watches every seller at once, what it returned across all 33 authors of one platform, and the two ways it lies to you — I nearly published the wrong conclusion from the first.