{"id":"901c5ea1-59e1-43e0-b573-bca1eddf6614","shortId":"6fFeDC","kind":"x402","title":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The site hosts a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per call settled in USDC (USD Coin) on Base.\n\nThe specific endpoint `/api/v1/claims/78` is listed under the generic label \"Premium API Access\" with no further documentation about what data or functionality it returns. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. No API keys or rate limits are advertised; access is gated solely by the x402 payment header.\n\nDocumentation is extremely sparse — the docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of what `/api/v1/claims/78` actually returns. The endpoint is confirmed live (402 challenge captured) but its actual functionality remains opaque.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["api-gateway","crypto"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium access","USDC pay-per-call","Base network API","micropayment API"],"warnings":["No documentation available — docs/pricing/README pages only show 'Connect wallet'","The purpose and response format of /api/v1/claims/78 is entirely unknown","No OpenAPI schema or example payloads provided","Functionality cannot be verified without paying"],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/78","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/claims/78","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via 402 challenge and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually does, no request/response schema, and no examples. The 'Premium API Access' label is completely 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'0.02':11,26,72,135 '000':124 '0x8335':129 '20':123 '2913':130 '402':199 '6':133 'Base network API' 'USDC pay-per-call' 'accept':113 'access':6,21,38,94,146 'actual':192,204 'addit':174 'advertis':145 'ai/ml':62 'analyt':61 'api':5,20,37,58,93,139 'base':8,23,46,81,125,132 'base-network' 'call':74,137 'captur':201 'challeng':108,200 'coin':79 'collect':52 'confirm':109,197 'connect':169 'data':60,65,101 'decim':134 'descript':188 'detail':176 'doc':160 'document':98,155 'endpoint':32,84,195 'exampl':183 'extrem':157 'finance/web3':64 'function':103,205 'gate':3,18,148 'generic':90 'header':154 'host':50 'infer':63 'infrastructur':67 'json-response' 'key':140 'label':91 'limit':143 'list':87 'live':112,198 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'micropayment API' 'network':9,24,47 'no-api-key' 'opaqu':207 'openapi':180 'page':164 'pay':10,25,55 'pay-per-request':54 'payload':185 'payment':42,119,153 'per':12,27,56,73,136 'post':114 'premium':4,19,36,92 'price':70,161 'prompt':171 'protocol':43 'provid':35 'rate':142 'readm':163 'remain':206 'render':166 'request':13,28,57,115 'request/response':184 'requir':117 'return':105,193 'schema':181 'settl':75 'site':49 'sole':149 'span':59 'spars':158 'specif':83 'technic':175 'unit':126 'usd':78 'usdc':15,30,77,128 'usdc-settlement' 'util':68 'via':39 'wallet':170 'x402':2,17,41,107,152 'x402 premium access' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"24cfde66-cdf2-4371-a212-17110af65bb0","listingId":"901c5ea1-59e1-43e0-b573-bca1eddf6614","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/claims/78","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:54.932Z"}],"sources":[{"listingId":"901c5ea1-59e1-43e0-b573-bca1eddf6614","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/78","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:54.932Z","lastSeenAt":"2026-04-23T20:02:20.492Z"}],"details":{"listingId":"901c5ea1-59e1-43e0-b573-bca1eddf6614","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/78 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","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/claims/78"},{"claim":"Site advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/claims/78"}],"useCases":["Programmatic access to a premium resource gated by x402 micropayment","Agent-driven API consumption without pre-registration or API keys","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-per-use API access on Base","Low-friction micropayment API consumption"],"notFor":["Users who need detailed documentation or guaranteed SLAs","High-volume batch processing where per-call fees add up","Anyone needing clarity on what data the endpoint actually returns"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.161Z"},"updatedAt":"2026-04-23T20:02:20.492Z"}}