{"id":"9bc13013-9bee-48fd-acf4-08f39d199b0f","shortId":"rhZ6zG","kind":"x402","title":"Query DeFi protocol fees and revenue data via x402 micropayment per call.","tagline":"Query DeFi protocol fees and revenue data via x402 micropayment per call.","description":"The `/defi/fees` endpoint is part of the DeFi Intelligence API hosted at defi.hugen.tokyo. It returns fee and revenue data for a specified DeFi protocol (identified by slug, e.g. \"uniswap\", \"aave\"). The endpoint accepts a required `protocol` query parameter and returns metrics such as `total24h` and `total7d` fee totals. Payment is handled via the x402 protocol at $0.01 USDC on Base per call — no API key or account setup is required.\n\nThis endpoint is one of 26 paid DeFi endpoints offered by the same API, which spans token security audits, bridge routing, gas prices, TVL, DEX volume, stablecoin analytics, and more. The API also offers alternative access methods: a broker proxy (with a free API key and $0.05 credit), an MCP server at mcp.hugen.tokyo, and a Python SDK (`x402-pay`). The OpenAPI 3.1 spec is published at `/openapi.json` and a machine-readable `/llms.txt` is available for LLM agents.\n\nThe endpoint was confirmed live, returning a 402 challenge with a sample response showing Uniswap fee data (`total24h: 3500000`, `total7d: 24500000`). Response schemas for the 200 case are not explicitly defined in the OpenAPI spec (empty schema object), so the exact shape of the returned JSON must be inferred from the sample in the 402 challenge.","tags":[],"capabilities":["protocol-fee-data","defi-analytics","x402-micropayment","no-api-key","multi-chain","per-call-payment"],"categories":["defi","analytics"],"synonyms":["protocol fees","DeFi revenue","protocol revenue","fee tracker","DeFi fees API","protocol analytics","on-chain fees","DeFi data"],"warnings":["Response schema for /defi/fees is not defined in the OpenAPI spec (empty schema object); actual response shape is inferred from the 402 challenge sample only.","No dedicated pricing or documentation pages found — /pricing, /api, /README all return 404.","Units of total24h/total7d values are unclear (likely USD but not explicitly documented)."],"endpointUrl":"https://defi.hugen.tokyo/defi/fees","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":"0.620","qualityRationale":"The endpoint is live (402 challenge confirmed) with a published OpenAPI 3.1 spec covering all 26 endpoints. However, the response schema for /defi/fees is empty (no defined properties), and the only response example comes from the 402 challenge sample. No dedicated documentation page or pricing page exists beyond the Swagger 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'/llms.txt':168 '/openapi.json':162 '0.01':81 '0.05':141 '200':199 '24500000':194 '26':100 '3.1':157 '3500000':192 '402':181,228 'DeFi data' 'DeFi fees API' 'DeFi revenue' 'aav':54 'accept':57 'access':130 'account':91 'agent':173 'also':127 'altern':129 'analyt':122 'api':34,88,108,126,138 'audit':113 'avail':170 'base':84 'bridg':114 'broker':133 'call':12,24,86 'case':200 'challeng':182,229 'confirm':177 'credit':142 'data':7,19,43,190 'defi':2,14,32,47,102 'defi-analytics' 'defi.hugen.tokyo':37 'defin':204 'dex':119 'e.g':52 'empti':209 'endpoint':27,56,96,103,175 'exact':214 'explicit':203 'fee':4,16,40,71,189 'fee tracker' 'free':137 'gas':116 'handl':75 'host':35 'identifi':49 'infer':222 'intellig':33 'json':219 'key':89,139 'live':178 'llm':172 'machin':166 'machine-read':165 'mcp':144 'mcp.hugen.tokyo':147 'method':131 'metric':65 'micropay':10,22 'multi-chain' 'must':220 'no-api-key' 'object':211 'offer':104,128 'on-chain fees' 'one':98 'openapi':156,207 'paid':101 'paramet':62 'part':29 'pay':154 'payment':73 'per':11,23,85 'per-call-payment' 'price':117 'protocol':3,15,48,60,79 'protocol analytics' 'protocol fees' 'protocol revenue' 'protocol-fee-data' 'proxi':134 'publish':160 'python':150 'queri':1,13,61 'readabl':167 'requir':59,94 'respons':186,195 'return':39,64,179,218 'revenu':6,18,42 'rout':115 'sampl':185,225 'schema':196,210 'sdk':151 'secur':112 'server':145 'setup':92 'shape':215 'show':187 'slug':51 'span':110 'spec':158,208 'specifi':46 'stablecoin':121 'token':111 'total':72 'total24h':68,191 'total7d':70,193 'tvl':118 'uniswap':53,188 'usdc':82 'via':8,20,76 'volum':120 'x402':9,21,78,153 'x402-micropayment' 'x402-pay':152","prices":[{"id":"f3393bbc-b92c-4a93-be28-97ca1c4481ad","listingId":"9bc13013-9bee-48fd-acf4-08f39d199b0f","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":"9bc13013-9bee-48fd-acf4-08f39d199b0f","source":"x402_bazaar","sourceId":"https://defi.hugen.tokyo/defi/fees","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":"9bc13013-9bee-48fd-acf4-08f39d199b0f","quickStartSnippet":"# Using the x402-pay Python SDK\npip install x402-pay\n\nimport x402_pay\nresp = x402_pay.get('https://defi.hugen.tokyo/defi/fees?protocol=uniswap')\nprint(resp.json())","exampleRequest":null,"exampleResponse":{"name":"uniswap","total7d":24500000,"total24h":3500000},"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/fees endpoint requires a 'protocol' query parameter (protocol slug) and is a GET request.","source_url":"https://defi.hugen.tokyo/openapi.json"},{"claim":"The x402 challenge indicates payment of $0.01 USDC on Base per call, with a sample response showing Uniswap fee data.","source_url":"https://defi.hugen.tokyo/defi/fees"},{"claim":"Alternative access methods include a broker proxy, MCP server at mcp.hugen.tokyo, and the x402-pay Python SDK.","source_url":"https://defi.hugen.tokyo/defi/fees"}],"useCases":["Querying 24-hour and 7-day fee revenue for a specific DeFi protocol","Comparing fee generation across protocols for investment research","Feeding protocol fee data into automated trading or analytics dashboards","LLM agents retrieving real-time DeFi fee metrics without API key setup"],"bestFor":["Agents or bots needing on-demand DeFi protocol fee lookups","Developers who want pay-per-call access without managing API keys","Researchers comparing protocol revenue across the DeFi ecosystem"],"notFor":["High-frequency bulk data ingestion (each call costs $0.01)","Historical time-series fee data (endpoint appears to return current snapshots only)","Users who need free or unlimited access to DeFi analytics"],"kindDetails":{},"updatedAt":"2026-04-22T02:20:09.435Z"}}