{"id":"e96338e4-b025-4bef-b9bb-db20a21b2825","shortId":"2pUCcd","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 (transaction ID 155) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call API endpoints 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.\n\nThe specific endpoint `/api/v1/transactions/155/receipt` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys, rate limits, or subscriptions are required — each call is independently paid.\n\nDocumentation on the site is extremely thin. 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 documentation, and no examples available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual shape of the receipt response and what input the POST body expects are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","transaction-receipt","pay-per-call","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment endpoint","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API","receipt lookup"],"warnings":["No API documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'","No OpenAPI or schema definition; request body format and response structure are unknown","Endpoint is scoped to a single transaction ID (155); unclear if other transaction IDs are available at similar paths","The broader platform advertises many endpoints (AI, analytics, finance, utils) but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/155/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/155/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent — docs/pricing/API pages all show only 'Connect wallet'. No OpenAPI spec, no request/response schemas, no examples. The endpoint path is specific to a single transaction ID (155), making its general utility 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'0.02':11,24,73,134 '000':123 '0x8335':128 '155':39 '20':122 '2913':129 '402':200 '6':138 'Base network API' 'USDC pay-per-call' 'accept':88 'access':32 'actual':204 'advertis':117 'ai/ml':63 'amount':120 'analyt':62 'api':58,141,163 'avail':191 'base':8,21,82,124,131 'base-network' 'behind':40 'bodi':215 'broader':49 'call':57,150 'caller':101 'challeng':116,201 'confirm':195 'connect':172 'content':178 'crypto payment API' 'data':61,66 'decim':139 'doc':162 'document':154,187 'dozen':52 'endpoint':28,59,86,193 'equal':133 'exampl':190 'expect':216 'extrem':159 'finance/web3':65 'given':135 'handl':96 'header':108 'id':38 'includ':103 'independ':152 'infer':64 'infrastructur':68 'input':212 'json':93 'json-response' 'key':142 'limit':144 'live':196 'lowpaymentfee' 'lowpaymentfee.com':30 'max':119 'micropay':6,19 'must':102 'network':9,22,83 'no-api-key' 'offer':51 'openapi':182 'page':167 'paid':153 'part':46 'pay':55 'pay-per-cal':54 'pay-per-call' 'payment':94,107,112 'paywal':43 'per':12,25,56,74 'platform':50 'post':89,214 'price':71,164 'prompt':174 'proof':113 'proper':199 'protocol':100 'provid':31 'rate':143 'readm':166 'receipt':2,15,36,208 'receipt lookup' 'render':169 'request':13,26,75,90 'request/response':185 'requir':148 'respons':209 'retriev':3,16 'return':92,197 'schema':186 'settl':77 'shape':205 'site':157 'span':60 'spec':183 'specif':85 'subscript':146 'thin':160 'transact':1,14,35,37 'transaction receipt API' 'transaction-receipt' 'unit':125 'unknown':218 'usdc':79,127,136 'usdc-settlement' 'util':69 'valid':111 'via':4,17,97 'wallet':173 'x':106 'x-payment':105 'x402':5,18,42,99,115 'x402 micropayment endpoint' 'x402-payment'","prices":[{"id":"5ec08b4c-6eae-4416-aede-1675011febe7","listingId":"e96338e4-b025-4bef-b9bb-db20a21b2825","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/155/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":"2026-04-18T18:58:36.353Z"}],"sources":[{"listingId":"e96338e4-b025-4bef-b9bb-db20a21b2825","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/155/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:36.353Z","lastSeenAt":"2026-04-25T00:05:09.896Z"}],"details":{"listingId":"e96338e4-b025-4bef-b9bb-db20a21b2825","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/155/receipt \\\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":"The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/transactions/155/receipt"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/155/receipt"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a receipt for a specific transaction (ID 155) via programmatic API call","Demonstrating x402 protocol integration for pay-per-call services","Agent-driven receipt fetching without pre-registration or API keys"],"bestFor":["Developers experimenting with x402 protocol payments","Agents needing on-demand transaction receipt data without subscriptions","Low-friction, no-signup API access paid in USDC on Base"],"notFor":["Bulk retrieval of many different transaction receipts (only transaction 155 is exposed at this URL)","Users who need detailed API documentation or request/response schemas before integrating","Non-crypto users who cannot pay in USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:43.601Z"},"updatedAt":"2026-04-25T00:05:09.896Z"}}