{"id":"beb5abcc-e729-4b00-892a-4ff99af93852","shortId":"YJYwau","kind":"x402","title":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides a transaction receipt resource (transaction ID 211) behind an x402 paywall. It is part of a broader platform that advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/transactions/211/receipt` accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the accepted payment scheme (exact), the USDC asset contract on Base (`0x8335…`), and a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys are required; access is granted per-request upon valid payment. The platform advertises no rate limits and instant access.\n\nDocumentation 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 beyond the x402 challenge's `outputSchema`, and no explanation of what the receipt payload actually contains. The platform lists many other endpoints across analytics, AI, finance, and utility categories, but this listing covers only the `/api/v1/transactions/211/receipt` resource.","tags":[],"capabilities":["x402-payment","usdc-base","transaction-receipt","per-request-billing","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["transaction receipt API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) contain no usable content — only a 'Connect wallet' prompt.","No OpenAPI or schema describing the receipt response body.","Endpoint is scoped to a single transaction ID (211); unclear if this is a demo or a real resource.","The broader platform lists many endpoints (AI, analytics, finance, utils) but none have documented schemas."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transactions/211/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/211/receipt","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but documentation is effectively nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no explanation of what the receipt payload contains. The endpoint path is specific to a single transaction ID (211), making its general utility 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'/api/v1/transactions/211/receipt':84,220 '/docs':160 '/pricing':162 '/readme':164 '0.02':10,24,71,126 '000':122 '0x8335':115 '20':121 '211':40 '402':101 '6':130 'Base network API' 'USDC micropayment API' 'accept':85,105 'access':137,154 'across':207 'actual':199 'advertis':53,148 'ai':60,209 'amount':119 'analyt':59,208 'api':55,133 'application/json':90 'asset':111 'base':8,22,79,114,123 'behind':41 'beyond':185 'broader':50 'caller':98 'categori':56,213 'challeng':102,188 'connect':170 'contain':103,200 'content':176 'contract':112 'cover':217 'data':58 'decim':131 'document':155 'endpoint':6,20,30,83,206 'exact':108 'explan':193 'extrem':157 'financ':63,210 'gate':3,17 'given':127 'grant':139 'handl':93 'i.e':125 'id':39 'includ':57 'infrastructur':66 'instant':153 'key':134 'learn':62 'limit':151 'list':203,216 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':61 'mani':204 'maximum':118 'multipl':54 'network':80 'no-api-key' 'openapi':180 'outputschema':190 'page':165 'part':47 'pay':9,23 'pay-per-call API' 'payload':198 'payment':91,106,145 'paywal':44 'per':13,27,72,141 'per-request':140 'per-request-billing' 'platform':51,147,202 'post':86 'price':69 'prompt':172 'protocol':97 'provid':33 'rate':150 'receipt':5,19,36,197 'receiv':99 'render':167 'request':14,28,73,87,142 'request/response':183 'requir':136 'resourc':37,221 'return':89 'schema':184 'scheme':107 'settl':74 'spars':158 'spec':181 'specif':82 'transact':4,18,35,38 'transaction receipt API' 'transaction-receipt' 'unit':124 'upon':143 'usdc':12,26,76,110,128 'usdc-base' 'util':67,212 'valid':144 'via':94 'wallet':171 'web3':64 'x402':2,16,43,96,187 'x402 payment endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"255c98f5-d953-415d-984d-d0cfb752532b","listingId":"beb5abcc-e729-4b00-892a-4ff99af93852","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/211/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":"2026-04-18T18:59:19.894Z"}],"sources":[{"listingId":"beb5abcc-e729-4b00-892a-4ff99af93852","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transactions/211/receipt","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:59:19.894Z","lastSeenAt":"2026-04-24T17:03:04.641Z"}],"details":{"listingId":"beb5abcc-e729-4b00-892a-4ff99af93852","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transactions/211/receipt\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid USDC payment to receive the receipt.","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 maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/transactions/211/receipt"},{"claim":"Platform advertises $0.02 per request across all endpoints with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/transactions/211/receipt"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving a receipt for a specific transaction (ID 211) via programmatic payment","Demonstrating x402 protocol integration for per-request micropayments","Agents that need to fetch financial transaction records without pre-registration"],"bestFor":["Developers experimenting with x402 pay-per-request protocols","Agents needing keyless, on-demand API access settled in USDC on Base","Prototyping micropayment-gated API workflows"],"notFor":["Production use requiring documented request/response schemas","Bulk retrieval of many transaction receipts (each call costs $0.02 with no batch endpoint documented)","Users who need detailed API documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:41.587Z"},"updatedAt":"2026-04-24T17:03:04.641Z"}}