{"id":"e791914e-f80d-4a7f-adcc-1859e00c74e8","shortId":"kbeDKC","kind":"x402","title":"DeFi protocol info (TVL, chains, category) via x402 micropayment — $0.01 per call.","tagline":"DeFi protocol info (TVL, chains, category) via x402 micropayment — $0.01 per call.","description":"The `/defi/protocol` endpoint is part of the DeFi Intelligence API hosted at defi.hugen.tokyo. It returns protocol-level information for a given DeFi protocol slug (e.g., \"aave\", \"uniswap\"), including fields such as protocol name, total value locked (TVL), chain-level TVL breakdowns, category (e.g., Lending), and the list of chains the protocol operates on. Payment is handled via the x402 protocol at $0.01 USDC per call on Base, with no API keys or rate limits required.\n\nThe broader API suite exposes 26 DeFi-focused endpoints covering token security audits, address and NFT security checks, rugpull detection, phishing URL checks, transaction simulation, bridge quoting/routing/status, gas prices, token prices, stablecoin data, DEX volume, and protocol fees. All endpoints follow the same x402 pay-per-call model. Alternative access methods include a broker API (API-key based, no wallet needed), an MCP server at mcp.hugen.tokyo, and a Python SDK (`x402-pay`).\n\nThe endpoint accepts a single required query parameter `name` (the protocol slug) and returns JSON. The x402 challenge was captured live, confirming the endpoint is operational. Response schemas are not fully specified in the OpenAPI document (empty schema objects), so the exact response shape is inferred from the sample challenge data included in the 402 response.","tags":[],"capabilities":["defi-protocol-info","tvl-lookup","chain-tvl-breakdown","protocol-category","x402-micropayment","pay-per-call","no-api-key","multi-chain-data"],"categories":["defi","crypto","data"],"synonyms":["DeFi protocol lookup","protocol TVL","DeFi analytics","protocol info API","DeFi data endpoint","Aave TVL","Uniswap protocol data","DeFi intelligence","protocol chains"],"warnings":["Response schema is not formally defined in the OpenAPI spec — the example response is inferred from the x402 challenge sample data and may differ from actual responses.","Root domain returns 404; documentation is only available at /docs path.","No dedicated pricing page found; price is only stated in the x402 challenge notice."],"endpointUrl":"https://defi.hugen.tokyo/defi/protocol","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) with a full OpenAPI spec listing parameters, but response schemas are empty (no formal output schema). The sample response is inferred from the x402 challenge payload. Pricing is clear ($0.01 USDC on Base). Documentation exists at /docs but lacks detailed field descriptions for 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'0.01':10,22,88 '26':107 '402':232 'Aave TVL' 'DeFi analytics' 'DeFi data endpoint' 'DeFi intelligence' 'DeFi protocol lookup' 'Uniswap protocol data' 'aav':51 'accept':180 'access':153 'address':116 'altern':152 'api':34,96,104,158,160 'api-key':159 'audit':115 'base':93,162 'breakdown':67 'bridg':128 'broader':103 'broker':157 'call':12,24,91,150 'captur':197 'categori':6,18,68 'chain':5,17,64,75 'chain-level':63 'chain-tvl-breakdown' 'challeng':195,227 'check':120,125 'confirm':199 'cover':112 'data':135,228 'defi':1,13,32,47,109 'defi-focus':108 'defi-protocol-info' 'defi.hugen.tokyo':37 'detect':122 'dex':136 'document':213 'e.g':50,69 'empti':214 'endpoint':27,111,142,179,201 'exact':219 'expos':106 'fee':140 'field':54 'focus':110 'follow':143 'fulli':208 'gas':130 'given':46 'handl':82 'host':35 'includ':53,155,229 'infer':223 'info':3,15 'inform':43 'intellig':33 'json':192 'key':97,161 'lend':70 'level':42,65 'limit':100 'list':73 'live':198 'lock':61 'mcp':167 'mcp.hugen.tokyo':170 'method':154 'micropay':9,21 'model':151 'multi-chain-data' 'name':58,186 'need':165 'nft':118 'no-api-key' 'object':216 'openapi':212 'oper':78,203 'paramet':185 'part':29 'pay':148,177 'pay-per-cal':147 'pay-per-call' 'payment':80 'per':11,23,90,149 'phish':123 'price':131,133 'protocol':2,14,41,48,57,77,86,139,188 'protocol TVL' 'protocol chains' 'protocol info API' 'protocol-category' 'protocol-level':40 'python':173 'queri':184 'quoting/routing/status':129 'rate':99 'requir':101,183 'respons':204,220,233 'return':39,191 'rugpul':121 'sampl':226 'schema':205,215 'sdk':174 'secur':114,119 'server':168 'shape':221 'simul':127 'singl':182 'slug':49,189 'specifi':209 'stablecoin':134 'suit':105 'token':113,132 'total':59 'transact':126 'tvl':4,16,62,66 'tvl-lookup' 'uniswap':52 'url':124 'usdc':89 'valu':60 'via':7,19,83 'volum':137 'wallet':164 'x402':8,20,85,146,176,194 'x402-micropayment' 'x402-pay':175","prices":[{"id":"d93f31ee-0b97-4918-a542-f9123e7df4d5","listingId":"e791914e-f80d-4a7f-adcc-1859e00c74e8","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":"2026-04-21T18:32:37.742Z"}],"sources":[{"listingId":"e791914e-f80d-4a7f-adcc-1859e00c74e8","source":"x402_bazaar","sourceId":"https://defi.hugen.tokyo/defi/protocol","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.742Z","lastSeenAt":"2026-04-22T05:32:30.047Z"}],"details":{"listingId":"e791914e-f80d-4a7f-adcc-1859e00c74e8","quickStartSnippet":"# Using the x402-pay Python SDK\npip install x402-pay\n\nimport x402_pay\nresp = x402_pay.get('https://defi.hugen.tokyo/defi/protocol?name=aave')\nprint(resp.json())","exampleRequest":{"url":"https://defi.hugen.tokyo/defi/protocol?name=aave","method":"GET"},"exampleResponse":{"tvl":12500000000,"name":"Aave","chains":["Ethereum","Polygon","Arbitrum"],"category":"Lending","chainTvls":{"Ethereum":8000000000}},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"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 /defi/protocol endpoint accepts a required query parameter 'name' described as 'Protocol slug (e.g., aave, uniswap)'","source_url":"https://defi.hugen.tokyo/openapi.json"},{"claim":"Payment is $0.01 USDC on Base per call as stated in the x402 challenge","source_url":"https://defi.hugen.tokyo/defi/protocol"},{"claim":"Alternative access via broker API, MCP server, and x402-pay Python SDK","source_url":"https://defi.hugen.tokyo/defi/protocol"}],"useCases":["Look up TVL and chain distribution for any DeFi protocol by slug","Build dashboards that display protocol-level DeFi metrics","Agent-driven portfolio analysis that needs protocol category and chain coverage","Compare DeFi protocols by TVL and supported chains","Feed protocol data into risk models or research pipelines"],"bestFor":["AI agents needing on-demand DeFi protocol metadata without API key setup","Developers who want pay-per-call access to aggregated DeFi protocol data","Quick lookups of protocol TVL, category, and chain presence"],"notFor":["High-frequency bulk data pulls where per-call pricing adds up","Historical time-series TVL data (endpoint appears to return current snapshot only)","Users who need free/unlimited access to protocol data"],"kindDetails":{},"updatedAt":"2026-04-22T02:20:54.853Z"}}