The Sei x402 marketplace
Pay-per-call tools for AI agents - settled in USDC on Sei in ~1 second, no signup, no API keys. The wallet is the account.
An open index of the whole Sei x402 economy - this host plus every independent seller the hourly crawl finds (CDP Bazaar included). Not a walled market: other venues' listings appear here too.
Latest settlement: $0.001 USDC · on-chain receipt · 2026-09-10T17:01:55.000Z
A paid canary buys tools over the Sei rail daily (facilitator: PayAI) - uptime proven with real settlements, not pings.
Agent402 runs this index and sells 500+ tools, metered models and reports on the same rails. Our own canary and volume runs are excluded from these figures; the ranked rows measure other sellers on chain and never include the host.
healthy = the last crawl of the origin succeeded, nothing more. dispatch = this host's router will pay the seller on a buyer's behalf right now; a seller can be listed, healthy and still not dispatch-eligible (no known payment network, or no settlement history on Base yet). The reason is on each row and on /api/index as routerDispatchReason.
Activity
activity scan temporarily unavailable - settlements remain independently verifiable on seiscan.io
Sellers settling on Sei
pick a seller to scope the activity charts · THIS HOST = run by agent402 · every other seller is independent, found by the open crawl · tx = settled calls, last 7 days on-chain
Buy tools with USDC on Sei
Every one of the 500+ tools in the catalog takes USDC on Sei, from $0.001 to $3.30 a call, across live public data, crypto & onchain data, skill packs, web & documents, llm gateway, data conversion and more. The catalog page carries the category browser; this page is the chain's ledger.
agents: GET https://agent402.tools/api/route?q=<task>&network=sei
Sell on Sei
Accept the Sei CAIP-2 network (eip155:1329) in your 402 challenge - the PayAI facilitator verifies and settles native Circle USDC, gas sponsored. Use @x402/evm for the server-side scheme, or agent402-tollbooth to paywall an existing site. Then serve /.well-known/x402 - list it on /sell (free) and the index crawler picks it up; ranking is health-based, listing is free. Want a guaranteed crawl? Open a seed request.
{
"scheme": "exact",
"network": "eip155:1329",
"asset": "USDC",
"payTo": "your-wallet"
}
machine-readable: /api/route?network=sei · /.well-known/x402 · /openapi.json · /api/reliability