{"id":"3d0ea16f-87fe-4c47-98cd-5d8267738ed1","shortId":"Sa8GDX","kind":"x402","title":"Look up token prices by chain:address pairs via x402 micropayment, part of a 26-endpoint DeFi intelligence API.","tagline":"Look up token prices by chain:address pairs via x402 micropayment, part of a 26-endpoint DeFi intelligence API.","description":"The `/defi/price` endpoint on the DeFi Intelligence API at defi.hugen.tokyo returns token price data given comma-separated `chain:address` pairs (e.g., `ethereum:0xdac17f...`). It is one of 26 DeFi-focused endpoints exposed through the x402 payment protocol, meaning each call costs a single micropayment — $0.01 USDC on Base — with no API keys or rate limits required. The broader API surface covers token security audits, address and NFT security checks, rugpull detection, phishing URL checks, EVM transaction simulation, approval security, dApp audits, cross-chain bridge quoting/routing/status, gas prices, protocol info and TVL, stablecoin data, DEX volume, and protocol fees.\n\nThe endpoint accepts a GET request with a required `coins` query parameter. The value is a comma-separated list of `chain:address` identifiers. The response schema is not explicitly documented beyond a generic 200 JSON response, but the upstream data likely returns price, symbol, and confidence fields per coin (as suggested by the sample in the x402 challenge). Alternative access methods include a broker API (via API key at discovery.hugen.tokyo), an MCP server at mcp.hugen.tokyo, and a Python SDK (`pip install x402-pay`).","tags":[],"capabilities":["token-price-lookup","multi-chain","x402-micropayment","defi-data","evm-token-pricing","no-api-key"],"categories":["defi","crypto","data"],"synonyms":["token price API","crypto price lookup","DeFi price feed","on-chain token price","coin price by address","EVM token price","DeFi Intelligence API price"],"warnings":["Response schema is not defined in the OpenAPI spec — the 200 response has an empty schema object.","Example response is inferred from the x402 challenge sample data, not from actual endpoint output documentation.","Root URL returns 404; documentation is only available at /docs."],"endpointUrl":"https://defi.hugen.tokyo/defi/price","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}]},"qualityScore":"0.650","qualityRationale":"The endpoint is live (402 challenge captured), has a full OpenAPI spec with parameter descriptions, and pricing is clear ($0.01 USDC on Base). However, the response schema for /defi/price is empty (no defined output fields), and the example response is inferred from the x402 challenge sample rather than actual endpoint documentation. No dedicated docs page for this specific endpoint 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'0.01':85 '0xdac17f':62 '200':174 '26':15,34,67 'DeFi Intelligence API price' 'DeFi price feed' 'EVM token price' 'accept':142 'access':200 'address':7,26,58,105,162 'altern':199 'api':19,38,46,91,99,205,207 'approv':118 'audit':104,121 'base':88 'beyond':171 'bridg':125 'broader':98 'broker':204 'call':80 'chain':6,25,57,124,161 'challeng':198 'check':109,114 'coin':149,189 'coin price by address' 'comma':55,157 'comma-separ':54,156 'confid':186 'cost':81 'cover':101 'cross':123 'cross-chain':122 'crypto price lookup' 'dapp':120 'data':52,134,180 'defi':17,36,44,69 'defi-data' 'defi-focus':68 'defi.hugen.tokyo':48 'detect':111 'dex':135 'discovery.hugen.tokyo':210 'document':170 'e.g':60 'endpoint':16,35,41,71,141 'ethereum':61 'evm':115 'evm-token-pricing' 'explicit':169 'expos':72 'fee':139 'field':187 'focus':70 'gas':127 'generic':173 'get':144 'given':53 'identifi':163 'includ':202 'info':130 'instal':221 'intellig':18,37,45 'json':175 'key':92,208 'like':181 'limit':95 'list':159 'look':1,20 'mcp':212 'mcp.hugen.tokyo':215 'mean':78 'method':201 'micropay':11,30,84 'multi-chain' 'nft':107 'no-api-key' 'on-chain token price' 'one':65 'pair':8,27,59 'paramet':151 'part':12,31 'pay':224 'payment':76 'per':188 'phish':112 'pip':220 'price':4,23,51,128,183 'protocol':77,129,138 'python':218 'queri':150 'quoting/routing/status':126 'rate':94 'request':145 'requir':96,148 'respons':165,176 'return':49,182 'rugpul':110 'sampl':194 'schema':166 'sdk':219 'secur':103,108,119 'separ':56,158 'server':213 'simul':117 'singl':83 'stablecoin':133 'suggest':191 'surfac':100 'symbol':184 'token':3,22,50,102 'token price API' 'token-price-lookup' 'transact':116 'tvl':132 'upstream':179 'url':113 'usdc':86 'valu':153 'via':9,28,206 'volum':136 'x402':10,29,75,197,223 'x402-micropayment' 'x402-pay':222","prices":[{"id":"5bf8c97b-f213-4200-bd25-9e991cecf351","listingId":"3d0ea16f-87fe-4c47-98cd-5d8267738ed1","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x29322Ea7EcB34aA6164cb2ddeB9CE650902E4f60","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"},"payTo":"4du4AfkjJEwch2zk3shkPJVZfyJHNDnNjEWC6AboaS5Z","amount":"5000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:37.719Z"}],"sources":[{"listingId":"3d0ea16f-87fe-4c47-98cd-5d8267738ed1","source":"x402_bazaar","sourceId":"https://defi.hugen.tokyo/defi/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.719Z","lastSeenAt":"2026-04-22T05:32:30.022Z"}],"details":{"listingId":"3d0ea16f-87fe-4c47-98cd-5d8267738ed1","quickStartSnippet":"# Using the x402-pay Python SDK\npip install x402-pay\n\nimport x402_pay\nresp = x402_pay.get(\n  'https://defi.hugen.tokyo/defi/price?coins=ethereum:0xdac17f958d2ee523a2206206994597c13d831ec7'\n)\nprint(resp.json())","exampleRequest":{"url":"https://defi.hugen.tokyo/defi/price?coins=ethereum:0xdac17f958d2ee523a2206206994597c13d831ec7","method":"GET"},"exampleResponse":{"coins":{"ethereum:0xdac17f958d2ee523a2206206994597c13d831ec7":{"price":1,"symbol":"USDT","decimals":6,"confidence":0.99}}},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The /defi/price endpoint accepts a 'coins' query parameter with comma-separated chain:address pairs.","source_url":"https://defi.hugen.tokyo/docs"},{"claim":"The API describes itself as '26 DeFi security and data endpoints — token audits, bridge routing, protocol analytics. No API keys, no rate limits, no setup for 3+ upstream services. One x402 payment per call.'","source_url":"https://defi.hugen.tokyo/docs"},{"claim":"The x402 challenge indicates a price of $0.01 USDC on Base per call.","source_url":"https://defi.hugen.tokyo/defi/price"},{"claim":"Alternative access via broker, MCP, and x402-pay SDK is documented in the x402 challenge alternatives.","source_url":"https://defi.hugen.tokyo/defi/price"}],"useCases":["Fetching current token prices for portfolio dashboards or trading bots","Resolving on-chain token addresses to USD prices for DeFi analytics","Powering AI agents that need real-time crypto price data without API key setup","Cross-chain price comparison for arbitrage detection"],"bestFor":["AI agents needing pay-per-call token price data with no signup","Developers who want a single API covering multiple upstream DeFi data sources","Quick prototyping of DeFi tools without managing API keys or rate limits"],"notFor":["High-frequency trading requiring sub-second latency and free unlimited calls","Historical OHLCV candlestick data or charting use cases","Users who need free/unlimited price feeds (e.g., CoinGecko free tier)"],"kindDetails":{},"updatedAt":"2026-04-22T02:19:49.273Z"}}