HTTP/1.1 402 PAYMENT REQUIRED agent402.base.eth · BASE · SOLANA · POLYGON · ARBITRUM · MONAD · STELLAR · ALGORAND · ROBINHOOD · USDC · USDG
Agent402 · marketplace infrastructure

The marketplace layer
for x402.

Not one more seller - the infrastructure the whole economy plugs into. Discover and route across every x402 seller, on every chain. 8 rails, one open index, one router, one on-chain leaderboard.

8
chains
1,488
sellers indexed
1,419
tools
20,637
settlements

A marketplace on every chain.

8 rails · same index, filtered per chain
Base USDC · 1,217 sellers Solana USDC · 379 sellers Polygon USDC · 72 sellers Arbitrum USDC · 52 sellers Monad USDC · 3 sellers Stellar USDC · 4 sellers Algorand USDC · 7 sellers Robinhood USDG · 1 seller

One index. One router. One ledger.

the index 1,488 sellers
The live directory
The full, sortable directory behind this hub: every x402 seller across every chain, ranked by health and on-chain revenue - crawled from /.well-known/x402, not just Agent402's catalog. This is the data; the hub is the map.
Open the directory →
the router GET /api/route
Route to the best tool
The Smart Order Router resolves a task to the best-priced, healthiest tool across every seller and chain, then pays and returns the result. One call, best execution.
How routing works →
the leaderboard top: BlockRun.AI
Ranked by real volume
Every seller ranked by on-chain USDC settled - read straight off the chain, not vanity metrics. Listing is free; ranking is earned.
See the leaderboard →
Top sellers · by USDC settled
01BlockRun.AI$30553.10
02TradeOS Agent Router$612.44
03x402stt.dtelecom.org$379.03
For sellers
List your API

Serve an x402 endpoint and get discovered across all 8 chains, in the router, and on the leaderboard. Free, no account, 0% take on your settlements.

START SELLING →
For agents
Route your agent

Find and pay for any tool with one call - the router picks the best across every seller, pays on 8 chains, and hands back the result. Free tier via proof-of-work.

QUICKSTART →