{"id":"7b69d1ef-b07a-4577-8f89-3425c1a2c605","shortId":"Curpwj","kind":"x402","title":"Transaction receipt retrieval via x402 micropayment on Base network, $0.02 per request in USDC.","tagline":"Transaction receipt retrieval via x402 micropayment on Base network, $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource path `/api/v1/transactions/313/receipt`) behind an x402 paywall. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a cost of $0.02 per request (20,000 base units with 6 decimals). The endpoint accepts POST requests and returns `application/json`.\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments — payment is handled entirely through the x402 protocol.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific purpose of the `/transactions/313/receipt` endpoint — whether it retrieves a blockchain transaction receipt, a payment receipt, or something else — is not documented. Prospective users should be aware that they are paying before knowing the exact response structure.","tags":[],"capabilities":["x402-payment","usdc-base-network","transaction-receipt","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 micropayment","USDC pay-per-call","Base network API","lowpaymentfee","receipt endpoint","crypto payment API"],"warnings":["No API documentation available; docs, pricing, API, and README pages all show only 'Connect wallet'","No request or response schema documented — callers pay before knowing what they receive","The specific semantics of /api/v1/transactions/313/receipt (what transaction 313 refers to) are undocumented","No OpenAPI or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/313/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/313/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 well-formed, confirming the endpoint exists and accepts payment. However, documentation is effectively nonexistent — every doc/pricing/API page returns only 'Connect wallet'. There is no OpenAPI spec, no request/response examples, and the specific purpose of this particular receipt endpoint is unclear. The listing is largely a 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'/transactions/313/receipt':192 '0.02':10,24,61,124 '000':65 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':56 '20':64 '6':69 'Base network API' 'USDC pay-per-call' 'accept':73 'access':34 'advertis':83 'ai/ml':95 'analysi':98 'analyt':94 'api':91,129,152 'application/json':78 'avail':182 'awar':214 'base':8,22,51,66 'behind':42 'blockchain':198 'broader':80 'call':90 'classif':100 'commit':137 'connect':161 'contract':55 'convers':117 'cost':59 'crawl':185 'crypto payment API' 'data':93,103 'decim':70 'detail':168 'doc':151 'document':146,177,209 'els':206 'embed':101 'endpoint':30,72,120,193 'entir':141 'estim':111 'exact':222 'exampl':181 'exchang':106 'extrem':148 'feed':105 'finance/web3':102 'gas':110 'generat':118 'geocod':115 'handl':140 'infer':96 'infrastructur':113 'json-response' 'key':130 'know':220 'limit':133 'list':122 'lowpaymentfee' 'lowpaymentfee.com':32,81 'materi':186 'micropay':6,20 'minimum':136 'network':9,23,52 'no-api-key' 'openapi':172 'page':156 'path':40 'pay':88,218 'pay-per-cal':87 'pay-per-request' 'payment':46,138,202 'paywal':45 'per':11,25,62,89,125 'platform':82 'post':74 'price':104,153 'prompt':163 'prospect':210 'protocol':145 'provid':33 'purpos':189 'quot':109 'rate':107,132 'readm':155 'receipt':2,16,38,200,203 'receipt endpoint' 'render':158 'request':12,26,63,75,126 'request/response':175 'resourc':39 'respons':223 'retriev':3,17,196 'return':77 'schema':176 'sentiment':97 'settl':48 'someth':205 'span':92 'spars':149 'spec':173 'specif':188 'structur':224 'suit':85 'summar':99 'technic':167 'token':108 'transact':1,15,37,199 'transaction receipt API' 'transaction-receipt' 'unit':67 'usag':180 'usdc':14,28,54 'usdc-base-network' 'use':53 'user':211 'util':114 'valid':116 'via':4,18 'wallet':162 'whether':194 'x402':5,19,44,144 'x402 micropayment' 'x402-payment'","prices":[{"id":"b3ba002b-d8c6-4e5f-a63a-fa75e8200b44","listingId":"7b69d1ef-b07a-4577-8f89-3425c1a2c605","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/313/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":"2026-04-18T19:25:54.377Z"}],"sources":[{"listingId":"7b69d1ef-b07a-4577-8f89-3425c1a2c605","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/313/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:25:54.377Z","lastSeenAt":"2026-04-24T10:33:27.676Z"}],"details":{"listingId":"7b69d1ef-b07a-4577-8f89-3425c1a2c605","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/313/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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/transactions/313/receipt"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/transactions/313/receipt"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/313/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 transaction receipt programmatically via micropayment","Integrating pay-per-call receipt lookups into agent workflows","Demonstrating x402 protocol payment flows on Base"],"bestFor":["Developers experimenting with x402 protocol integrations","Agents needing on-demand transaction receipt data without API key management","Low-volume, pay-as-you-go receipt retrieval"],"notFor":["High-volume batch receipt processing where per-call fees add up","Users who need detailed API documentation or response schema guarantees before paying","Applications requiring non-USDC or non-Base-network payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:39.434Z"},"updatedAt":"2026-04-24T10:33:27.676Z"}}