{"id":"4cfe0a8f-7f6e-429c-a87b-c378fb557d62","shortId":"HxX9Ed","kind":"x402","title":"Rug-pull detection for EVM tokens via x402 micropayment — $0.01 per call.","tagline":"Rug-pull detection for EVM tokens via x402 micropayment — $0.01 per call.","description":"The `/defi/rugpull` endpoint on the DeFi Intelligence API at defi.hugen.tokyo checks whether a token contract on a given EVM chain exhibits rug-pull characteristics. It accepts two required query parameters: `chain` (a numeric chain ID such as 1 for Ethereum, 56 for BSC, or 8453 for Base) and `address` (the token contract address). The endpoint is part of a larger suite of 26 DeFi security and data endpoints covering token audits, address screening, NFT security, phishing detection, bridge routing, protocol analytics, and more.\n\nPayment is handled via the x402 protocol: each call costs $0.01 USDC on Base. No API key or account registration is required for direct x402 usage — callers simply satisfy the 402 payment challenge. Alternative access methods are also advertised: a broker API key (free key with $0.05 credit), an MCP server at mcp.hugen.tokyo, and a Python SDK (`pip install x402-pay`). The API is described as open-source and not a proxy.\n\nThe endpoint returned a valid 402 challenge during probing, confirming it is live. A full OpenAPI 3.1 spec is available, though response schemas for this specific endpoint are empty (no documented response shape). No rate limits are documented.","tags":[],"capabilities":["rugpull-detection","token-security-audit","evm-chain-support","x402-micropayment","no-api-key-required"],"categories":["defi","security"],"synonyms":["rug pull check","token scam detection","DeFi rug pull API","smart contract audit","token safety check","honeypot detection","crypto scam scanner","token risk assessment"],"warnings":["Response schema is not documented — the OpenAPI spec has an empty schema object for the 200 response, so the shape of the rug-pull detection result is unknown.","No example responses are provided anywhere in the crawled material.","Root URL returns 404; documentation is only available at /docs.","owner_address is the zero address (0x000...000), which may indicate a placeholder or test configuration."],"endpointUrl":"https://defi.hugen.tokyo/defi/rugpull","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":"0.550","qualityRationale":"The endpoint is live (402 challenge confirmed) and has a full OpenAPI spec with clear input parameters. However, the response schema is empty — there is no documentation of what the rugpull detection response actually contains. No example responses, no field descriptions for output. Pricing is clear at $0.01 USDC on 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'0.01':11,24,121 '0.05':157 '1':65 '26':90 '3.1':201 '402':141,190 '56':68 '8453':72 'DeFi rug pull API' 'accept':53 'access':145 'account':129 'address':76,80,99 'advertis':149 'also':148 'altern':144 'analyt':108 'api':34,126,152,174 'audit':98 'avail':204 'base':74,124 'bridg':105 'broker':151 'bsc':70 'call':13,26,119 'caller':137 'chain':46,58,61 'challeng':143,191 'characterist':51 'check':37 'confirm':194 'contract':41,79 'cost':120 'cover':96 'credit':158 'crypto scam scanner' 'data':94 'defi':32,91 'defi.hugen.tokyo':36 'describ':176 'detect':4,17,104 'direct':134 'document':215,222 'empti':213 'endpoint':29,82,95,186,211 'ethereum':67 'evm':6,19,45 'evm-chain-support' 'exhibit':47 'free':154 'full':199 'given':44 'handl':113 'honeypot detection' 'id':62 'instal':169 'intellig':33 'key':127,153,155 'larger':87 'limit':220 'live':197 'mcp':160 'mcp.hugen.tokyo':163 'method':146 'micropay':10,23 'nft':101 'no-api-key-required' 'numer':60 'open':179 'open-sourc':178 'openapi':200 'paramet':57 'part':84 'pay':172 'payment':111,142 'per':12,25 'phish':103 'pip':168 'probe':193 'protocol':107,117 'proxi':184 'pull':3,16,50 'python':166 'queri':56 'rate':219 'registr':130 'requir':55,132 'respons':206,216 'return':187 'rout':106 'rug':2,15,49 'rug pull check' 'rug-pul':1,14,48 'rugpull-detection' 'satisfi':139 'schema':207 'screen':100 'sdk':167 'secur':92,102 'server':161 'shape':217 'simpli':138 'smart contract audit' 'sourc':180 'spec':202 'specif':210 'suit':88 'though':205 'token':7,20,40,78,97 'token risk assessment' 'token safety check' 'token scam detection' 'token-security-audit' 'two':54 'usag':136 'usdc':122 'valid':189 'via':8,21,114 'whether':38 'x402':9,22,116,135,171 'x402-micropayment' 'x402-pay':170","prices":[{"id":"89605954-a98e-48d5-9e27-27e3b5dc781e","listingId":"4cfe0a8f-7f6e-429c-a87b-c378fb557d62","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":"2026-04-21T18:32:37.631Z"}],"sources":[{"listingId":"4cfe0a8f-7f6e-429c-a87b-c378fb557d62","source":"x402_bazaar","sourceId":"https://defi.hugen.tokyo/defi/rugpull","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.631Z","lastSeenAt":"2026-04-22T05:32:29.912Z"}],"details":{"listingId":"4cfe0a8f-7f6e-429c-a87b-c378fb557d62","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/rugpull?chain=1&address=0xdac17f958d2ee523a2206206994597c13d831ec7'\n)\nprint(resp.json())","exampleRequest":{"url":"https://defi.hugen.tokyo/defi/rugpull?chain=1&address=0xdac17f958d2ee523a2206206994597c13d831ec7","method":"GET"},"exampleResponse":null,"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint costs $0.01 USDC on Base per call","source_url":"https://defi.hugen.tokyo/defi/rugpull"},{"claim":"26 DeFi security and data endpoints — token audits, bridge routing, protocol analytics","source_url":"https://defi.hugen.tokyo/docs"},{"claim":"The API is described as open-source and not a proxy","source_url":"https://defi.hugen.tokyo/defi/rugpull"},{"claim":"Alternative access via broker, MCP, and x402-pay SDK","source_url":"https://defi.hugen.tokyo/defi/rugpull"},{"claim":"Required parameters are chain (Chain ID) and address (Token contract address)","source_url":"https://defi.hugen.tokyo/openapi.json"}],"useCases":["Screening a newly discovered token for rug-pull risk before buying","Automated portfolio monitoring that flags tokens exhibiting rug-pull patterns","Building a DeFi security dashboard that aggregates multiple risk signals","Agent-driven trading bots that gate token purchases on safety checks","Wallet or dApp front-ends that warn users about risky tokens"],"bestFor":["AI agents that need per-call DeFi security checks without API key setup","Developers building token screening tools across multiple EVM chains","Automated trading systems that require low-cost, on-demand rug-pull analysis"],"notFor":["Solana-only token analysis (use the separate /defi/token/solana endpoint)","Comprehensive smart-contract source-code auditing","High-volume batch scanning where per-call micropayments become impractical"],"kindDetails":{},"updatedAt":"2026-04-22T02:24:02.374Z"}}