{"name":"ToolPick","description":"Which paid API should my agent call? ToolPick searches every paid x402 resource listed on the public x402 discovery indexes (36,000+ endpoints, merged from the CDP discovery API and the PayAI list) and ranks them for a task by relevance, real 30-day usage (calls and unique payers reported by the index), recency and price, with filters for max price, network (Base, Solana, Polygon, Arbitrum...) and minimum payers. The pick tier live-checks the top candidates (one unpaid request each: do they answer 402 with terms right now, does the price match the listing) and names a best verified pick plus the category price range; the market tier gives sellers and builders the competition and pricing picture for a category (price quartiles, payer-weighted price, top sellers by estimated revenue). Fail-closed: a stale or missing index is refused (not charged) and unverified candidates are never called verified. Paid per call over x402 or with prepaid credits; free preview and remote MCP.","paid":[{"tier":"lite","methods":["GET","POST"],"path":"/v1/lite","params":["need","max_price","network","min_payers"],"price":"$0.003","returns":"Top 5 resources (service, URL, method, price, networks, 30-day calls/payers, repeat_buyers, last called), match and host counts, index age, confidence, sources_failed.","network":"eip155:8453","asset":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F","facilitator":"https://api.cdp.coinbase.com/platform/v2/x402","x402":["v2","v1"]},{"tier":"pick","methods":["GET","POST"],"path":"/v1/pick","params":["need","max_price","network","min_payers"],"price":"$0.01","returns":"best_pick, cheapest_verified, top 10 results with live check for the top 5, category stats, index age, confidence, sources_failed.","network":"eip155:8453","asset":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F","facilitator":"https://api.cdp.coinbase.com/platform/v2/x402","x402":["v2","v1"]},{"tier":"market","methods":["GET","POST"],"path":"/v1/market","params":["need","network","limit"],"price":"$0.02","returns":"Category stats (resources, hosts, price quartiles, buyer price quartiles, payer-weighted median, calls, est. revenue), top sellers, top resources by payers, index age, confidence.","network":"eip155:8453","asset":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F","facilitator":"https://api.cdp.coinbase.com/platform/v2/x402","x402":["v2","v1"]}],"payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F","free":["/health","/v1/preview","/mcp","/v1/stats","/v1/needs","/openapi.json","/.well-known/x402"],"freeTier":{"preview":{"method":"GET","path":"/v1/preview","params":["need","max_price","network"],"limit":"10 requests/min per IP","returns":"match count and the top 3 service names with price, networks and 30-day payers (no URLs, no live checks)"},"mcp":{"method":"POST","path":"/mcp","transport":"streamable-http","tools":["find_paid_api"],"limit":"10 tool calls/min per IP (preview tier)"}},"engine":"toolpick-0.1.2","userAgent":"ToolPick/0.1 (+https://api.youraitools.co/toolpick/)","sources":{"cdp_discovery":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","payai_discovery":"https://facilitator.payai.network/discovery/resources","live_check":"one unpaid request to each candidate endpoint (pick tier)"},"policy":{"custody":"read-only: never pays other endpoints, never holds customer funds, never asks for keys","storage":"a compact copy of the public x402 discovery indexes, refreshed lazily at most every 6 hours; requests (IPs, wallets, payment headers) are not logged; need= text is kept only as anonymized daily aggregate counts (lowercased, emails/URLs/addresses/long numbers removed, max 120 chars; no IP, wallet or payment data; 90-day retention); needs asked 3+ times that matched poorly are public at /v1/needs","charging":"only HTTP 200 results are settled; bad input (400), no matches (404) and a stale or missing index or upstream failures (503) are free","failClosed":"a source or live check that fails or times out is listed in sources_failed and never counted as verified; confidence drops","privacy":"Seller pay-to addresses are not returned; only whether the live terms match the index."},"limits":["Index: every resource on the CDP x402 discovery API (with 30-day calls and unique payers) merged with the PayAI discovery list (no usage counts); refreshed lazily at most every 6 hours, no cron.","Usage counts are what the index reports: they include sellers testing their own endpoints and directory crawlers; repeat_buyers marks resources with 3+ payers and more calls than payers.","Prices are the cheapest USDC (6 decimals) entry per resource on mainnet networks; testnet-only resources are excluded.","Live checks (pick tier) send one unpaid request per candidate (3 s timeout) and read the 402 terms; nothing is ever paid. Endpoints with path parameters are not probed.","Fail-closed: an index older than 72 hours or missing is refused (503, not charged); 12-72 hours old is flagged stale with lower confidence; a candidate whose live check fails is unverified (listed in sources_failed), never verified."],"disclaimer":"Rankings use public x402 index metadata and the index-reported 30-day call and payer counts; listings are self-described by sellers and are not endorsements. A live check only shows that an endpoint answers with x402 payment terms right now, not that its data is good or that the seller is safe. Check terms before paying. ToolPick never pays, holds funds or keys.","source":"https://agentgate-source.pages.dev/x402-toolpick/","allTools":"https://youraitools.co/built-by-us","npm":"https://api.youraitools.co/toolpick/","endpoint":"https://toolpick.agentgate.workers.dev","networks":[{"network":"eip155:8453","name":"Base","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","symbol":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F"},{"network":"eip155:137","name":"Polygon","asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","symbol":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F"},{"network":"eip155:42161","name":"Arbitrum One","asset":"0xaf88d065e77c8cC2239327C5EDb3A432268e5831","symbol":"USDC","payTo":"0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F"},{"network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","name":"Solana","asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","symbol":"USDC","payTo":"FH73WbbUe2UyNzfy72MJs5nT3NxyDf9GrqE7kzjL2Jte"}]}