{"id":"a8785c5a-cc0e-4dcf-bf2a-8e9283c9dd62","shortId":"2bsVPf","kind":"x402","title":"Crypto token data for LEO via x402 micropayment on Base, $0.02 per request.","tagline":"Crypto token data for LEO via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides token data for LEO (likely UNUS SED LEO) through the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/tokens/LEO` sits within the Finance & Web3 category of the platform. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header with a valid payment proof.\n\nDocumentation on the site is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint's exact output format and the parameters it accepts (if any beyond the token symbol in the URL path) are unknown.","tags":[],"capabilities":["token-data","crypto-quotes","x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key"],"categories":["finance","crypto"],"synonyms":["LEO token price","UNUS SED LEO data","crypto token API","token quote API","x402 crypto data","micropayment API","Base USDC API"],"warnings":["No OpenAPI or schema documentation available — request parameters and response format are unknown","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content","The exact data returned for /api/v1/tokens/LEO is unverified; 'Premium API Access' is a generic description","Platform appears to be a broad multi-category API marketplace; quality and reliability of individual endpoints is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/LEO","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/tokens/LEO","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual data returned is entirely unknown, making this effectively a stub 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'0.02':11,24,64,118 '000':107 '0x8335':112 '20':106 '2913':113 'Base USDC API' 'LEO token price' 'UNUS SED LEO data' 'accept':96,200 'ai/ml':55 'analyt':54 'api':60,129,157 'attach':137 'avail':185 'base':10,23,73,108,115 'base-network' 'beyond':203 'broader':50 'caller':135 'categori':84 'challeng':90 'confirm':91 'connect':166 'content':172 'crawl':188 'crypto':1,14 'crypto token API' 'crypto-quotes' 'data':3,16,33,53 'doc':156 'document':148 'endpoint':28,77,93,191 'equal':117 'exact':125,193 'exampl':184 'extrem':153 'financ':82 'finance/web3':57 'format':195 'header':142 'infer':56 'infrastructur':59 'key':130 'leo':5,18,35,39 'like':36 'limit':133 'live':95 'lowpaymentfee.com':30 'made':121 'materi':189 'micropay':8,21 'micropayment API' 'network':74 'no-api-key' 'offer':52 'openapi':176 'output':194 'page':161 'paramet':198 'part':47 'path':210 'payment':43,102,119,141,146 'per':12,25,65 'per-request-pricing' 'platform':51,87 'post':97 'price':62,158 'prompt':168 'proof':147 'protocol':44 'provid':31 'rate':132 'readm':160 'render':163 'request':13,26,66,98 'request/response':179 'requir':100,134 'schema':180 'scheme':126 'sed':38 'settl':68 'simpli':136 'sit':79 'site':151 'spars':154 'spec':177 'specif':76 'symbol':206 'token':2,15,32,205 'token quote API' 'token-data' 'unit':109 'unknown':212 'unus':37 'url':209 'usag':183 'usdc':70,111 'usdc-settlement' 'valid':145 'via':6,19,122 'wallet':167 'web3':83 'within':80 'x':140 'x-payment':139 'x402':7,20,42,89,124 'x402 crypto data' 'x402-payment'","prices":[{"id":"63e0ec1b-b651-4585-9d55-3cd065cffe99","listingId":"a8785c5a-cc0e-4dcf-bf2a-8e9283c9dd62","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/tokens/LEO","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:04.398Z"}],"sources":[{"listingId":"a8785c5a-cc0e-4dcf-bf2a-8e9283c9dd62","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/LEO","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:04.398Z","lastSeenAt":"2026-04-24T03:02:52.332Z"}],"details":{"listingId":"a8785c5a-cc0e-4dcf-bf2a-8e9283c9dd62","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/LEO \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/LEO"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/LEO"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current LEO token data or price quotes programmatically","Integrating pay-per-call crypto market data into trading bots or dashboards","Agent-driven token lookups without managing API keys or subscriptions"],"bestFor":["Developers wanting zero-signup, pay-per-call token data","AI agents that can settle x402 micropayments on Base","Quick one-off token lookups without rate-limit concerns"],"notFor":["High-volume bulk data ingestion where per-call pricing adds up","Users who need comprehensive historical OHLCV data (no evidence this is supported)","Anyone unable to settle USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.901Z"},"updatedAt":"2026-04-24T03:02:52.332Z"}}