The Arbitrum x402 marketplace

Pay-per-call tools for AI agents - settled in USDC on Arbitrum in ~2 seconds, no signup, no API keys. The wallet is the account.

START HERE · BUYER PATH

auto-route a task →plan a multi-step job → try playground browse sellers

An open index of the whole Arbitrum x402 economy - this host plus every independent seller the crawl finds (CDP Bazaar included), each re-probed every 30 minutes. Not a walled market: other venues' listings appear here too.

Our latest own settlement (canary): $0.001 USDC · on-chain receipt · 2026-10-09T07:30:22.000Z

A paid canary buys tools over the Arbitrum rail daily (facilitator: Coinbase CDP first, PayAI as fallback) - uptime proven with real settlements, not pings.

·· RAIL MANIFEST ··ARBITRUM · MAINNET

networkeip155:42161

wiresx402

assetUSDC

settle latency~2 seconds

facilitatorCoinbase CDP (PayAI fallback)

buyer gasnone, the buyer only signs

explorerarbiscan.io →

daily canary✓ settled 9h ago

agents: GET /api/route?q=<task>&network=arbitrum

THIS SITE · HOST · NOT RANKED, NOT COUNTED

outside buyers on Arbitrum only

7 settlements, 30 days 4 distinct buyers, 30 days 7 settlements, since 2026-07-03 4 distinct buyers, since 2026-07-03

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. Settlements are counted from the sales ledger, which starts 2026-07-03; earlier calls were served and settled but are not itemised in it, so these are not lifetime totals.

tools → why pay here → every settlement →

Chain

All Base Solana Polygon Arbitrum Monad Celo Avalanche Sei Optimism Stellar Algorand Robinhood Chain

Sort

healthy = the last crawl of the origin succeeded, nothing more. dispatch = this host's router will buy from this seller 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.

SELLERS LISTED

445

one per origin · host not counted · 445 origins indexed

TOOLS (THIS HOST)

609

OUR LATEST SETTLE

$0.001

our own canary or volume run

PRICE FLOOR

$0.001

# SELLER CALLS VOLUME BUYERS TOOLS Share of the busiest seller listed

ACTIVITYTHIS HOST · 30D

TRANSACTIONS-19.4%

VOLUME-19.4%

$0.0560

BUYERS+11.8%

all inbound USDC settlements to this host's Arbitrum wallet

RAILArbitrumASSETUSDCSELLERS399 of 445 + this hostSCOPETHIS HOSTSCAN COMPLETEWINDOW30D? keys

Activity

THIS HOST · PAST 30 DAYS

TRANSACTIONS

VOLUME

$0.06

BUYERS

all inbound USDC settlements to this host's Arbitrum wallet · includes 49 internal canary buys

Sellers accepting Arbitrum

pick a seller to scope the activity charts · THIS HOST = run by agent402 · every other seller is independent, found by the open crawl · per-seller settlement counts are measured on Base only, so this roster shows none for Arbitrum; pick a seller to scan its Arbitrum wallet

showing the top 100 of 445 sellers · show all →

Buy tools with USDC on Arbitrum

608 of the 609 tools in the catalog take USDC on Arbitrum (1 tool is offered on Base only), from $0.001 to $3.30 a call, across crypto & onchain data, live public 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=arbitrum

Sell on Arbitrum

Accept the Arbitrum CAIP-2 network (eip155:42161) in your 402 challenge - the PayAI facilitator verifies and settles. 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.

List your API

Your API's origin

Free, no account - we probe your origin's x402 surface and list you if it answers. Ranking is health-based.

402 challenge · accepts[]JSON

{
  "scheme": "exact",
  "network": "eip155:42161",
  "asset": "USDC",
  "payTo": "your-wallet"
}

machine-readable: /api/route?network=arbitrum · /.well-known/x402 · /openapi.json · /api/reliability