{"id":"2803cdc8-78b9-46a6-9e00-2fbfe8aecd26","shortId":"AWNTKT","kind":"x402","title":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","tagline":"Transaction receipt retrieval via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource `/api/v1/transactions/359/receipt`) behind an x402 paywall. The provider operates a broad suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request and settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint probed here serves a receipt for transaction ID 359. It accepts POST requests and returns `application/json`. The x402 challenge confirms the endpoint is live, requesting a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a 300-second payment timeout.\n\nDocumentation beyond the landing page is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The broader platform advertises many endpoints (sentiment analysis, summarization, embeddings, price feeds, geocoding, etc.) but none have documented schemas. Treat this listing as a stub until richer documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-base","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["transaction receipt API","x402 micropayment endpoint","USDC pay-per-call","Base network API","lowpaymentfee","receipt lookup","payment-gated API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown.","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no content.","This endpoint is for a single hardcoded transaction ID (359); it is unclear whether other transaction IDs are supported or how to discover them.","The broader platform advertises many endpoints but none have verifiable documentation or schemas."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/359/receipt","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/transactions/359/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and confirms pricing and network details, but there is zero documentation for request/response schemas, no OpenAPI spec, and all doc pages render only a wallet-connect prompt. The specific endpoint (transaction 359 receipt) is narrow and unexplained. Effectively a stub 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'0.02':11,24,68,136 '000':131 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '20':130 '300':151 '359':110 '6':141 'Base network API' 'USDC pay-per-call' 'accept':112 'access':32 'address':145 'advertis':197 'ai/ml':58 'analysi':201 'analyt':57 'api':54,80,165 'application/json':117 'attach':91 'avail':223 'base':8,21,77,132,148 'becom':222 'behind':39 'beyond':156 'broad':47 'broader':195 'call':53 'caller':89 'challeng':120 'commit':86 'confirm':121 'connect':174 'content':180 'data':56,61 'decim':142 'doc':164 'document':155,189,211,221 'embed':203 'endpoint':28,101,123,199 'etc':207 'exampl':193 'extrem':161 'feed':205 'finance/web3':60 'geocod':206 'header':95 'id':109 'infer':59 'infrastructur':63 'json-response' 'key':81 'land':158 'limit':83 'list':215 'live':125 'lowpaymentfee' 'lowpaymentfee.com':30 'mani':198 'maximum':128 'micropay':6,19 'network':9,22,78 'no-api-key' 'none':209 'openapi':184 'oper':45 'page':159,169 'paid':143 'pay':51 'pay-per-cal':50 'pay-per-call' 'payment':94,153 'payment-gated API' 'paywal':42 'per':12,25,52,69 'platform':196 'post':113 'price':66,166,204 'probe':102 'prompt':176 'provid':31,44 'rate':82 'readm':168 'receipt':2,15,36,106 'receipt lookup' 'render':171 'request':13,26,70,98,114,126 'request/response':187 'requir':88 'resourc':37 'retriev':3,16 'return':116 'richer':220 'schema':188,212 'second':152 'sentiment':200 'serv':104 'settl':72 'simpli':90 'sinc':138 'span':55 'spec':185 'specif':100 'stub':218 'substant':179 'suit':48 'summar':202 'thin':162 'timeout':154 'transact':1,14,35,108 'transaction receipt API' 'transaction-receipt' 'treat':213 'unit':133 'upfront':85 'usag':192 'usd':137 'usdc':74,135,139 'usdc-base' 'use':140 'util':64 'via':4,17 'wallet':175 'x402':5,18,41,93,119 'x402 micropayment endpoint' 'x402-payment'","prices":[{"id":"bf5aeb7d-a526-4b45-ad42-af7268540ea8","listingId":"2803cdc8-78b9-46a6-9e00-2fbfe8aecd26","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/transactions/359/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:26:22.278Z"}],"sources":[{"listingId":"2803cdc8-78b9-46a6-9e00-2fbfe8aecd26","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/359/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:26:22.278Z","lastSeenAt":"2026-04-24T17:03:08.474Z"}],"details":{"listingId":"2803cdc8-78b9-46a6-9e00-2fbfe8aecd26","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/359/receipt \\\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":"The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base with a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/v1/transactions/359/receipt"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/transactions/359/receipt"},{"claim":"Documentation, API, pricing, and README pages render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a structured receipt for a specific transaction via micropayment","Demonstrating x402 payment flow integration on Base network","Programmatic access to transaction data without API key management"],"bestFor":["Developers experimenting with x402 payment protocols","Agents that need on-demand transaction receipts without subscription overhead","Low-volume, pay-as-you-go API consumption on Base"],"notFor":["High-volume batch receipt retrieval (no documented bulk endpoints)","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:38.079Z"},"updatedAt":"2026-04-24T17:03:08.474Z"}}