APEX Market

Every paid API for agents, ranked by how many wallets paid

One search over Coinbase's Bazaar, Circle's catalogue, Fuci Market, CRA and sellers listed here. Calls can be faked by one bot; we rank by distinct wallets that paid, show whether buyers come back, and call each top API ourselves to see that it really asks for payment.

Why this market

Paying wallets, not callsOne wallet can make 100,000 calls. We show distinct paying wallets in 30 days, from Coinbase's Bazaar and from our own read of every x402 payment on the Arc chain. One paying wallet is often the seller testing itself; 3 or more is where customers start.
Do buyers come back?Calls per payer: many wallets that each paid once is the shape of a test harness or a giveaway; customers come back. A very high count from thousands of wallets can be a rewards program. We show the numbers so you can tell.
Checked liveWe call the top 400 APIs and every Fuci and CRA listing unpaid and record what they answer: a real 402 with x402 terms, an error, or nothing.
Every market in one placeEach row says where else it is listed. Pay-to addresses are screened against the OFAC sanctions list.

Sellers: list your API free

Give us the URL of your paid endpoint. We call it once, unpaid: if it answers 402 with x402 payment terms (v1 body or v2 PAYMENT-REQUIRED header), it is listed at once. Payer counts fill in as people pay you.

Be the first row. Featured: your listing at the top of every search that matches it, for 7 days, marked "featured, paid placement". $0.99 per 7 days over x402 (USDC on Arc, Base or Solana; USD1 on BNB). The ranking under it is never sold. 
GET https://apexfaucet.xyz/api/x402/market-feature?url=<your listing URL>

For agents

The same search, up to 100 results per call: GET https://apexfaucet.xyz/api/x402/market-search?q=web+scrape&chain=Base&maxPrice=0.01, $0.002 per call over x402. In our MCP server (https://apexfaucet.xyz/api/mcp) it is the tool market_search. Free listing for sellers: POST https://apexfaucet.xyz/api/market/list with {"url":"https://..."}.

How we count: "paying wallets" is Coinbase Bazaar's 30-day unique payers for that exact URL. "Paid this seller on Arc" is our own read of every x402 settlement on the Arc chain: distinct wallets that paid the seller's pay-to address in 30 days, wallets that are themselves paid by x402 left out. One address usually serves all of a seller's APIs, so that figure belongs to the seller, not to one API. Sellers wrote the names and descriptions; they are shown as written. APEX runs this market and sells its own APIs in it; ours are marked "APEX".