{"id":"7f12169b-0a6f-47d4-912c-fcd9035ecd06","shortId":"4GPM7u","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 160) behind an x402 paywall. The endpoint accepts POST requests and returns application/json responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe specific endpoint `/api/v1/stripe/invoices/160` is labeled \"Premium API Access\" and costs up to 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The broader lowpaymentfee.com platform advertises a suite of APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto data feeds, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.\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 example payloads available. The exact behavior of this Stripe invoices endpoint — what input it expects and what invoice data it returns — is not documented. The x402 challenge is live and well-formed, confirming the endpoint is operational.","tags":[],"capabilities":["x402-payment","usdc-base-network","stripe-invoices","per-request-billing","no-api-key","json-response"],"categories":["finance","payments"],"synonyms":["stripe invoice api","x402 paid api","usdc micropayment api","pay-per-call api","base network api","lowpaymentfee","crypto payment endpoint"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response payloads","The specific behavior of /api/v1/stripe/invoices/160 is undocumented — unclear what data is returned","The endpoint is scoped to a single invoice ID (160); generalizability is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/160","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/stripe/invoices/160","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 works. However, there is zero documentation on request/response schemas, no OpenAPI spec, and the docs/pricing/README pages are all blank beyond a wallet connect prompt. The purpose and output of this specific Stripe invoices endpoint is 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'/api/v1/stripe/invoices/160':76 '/docs':145 '/pricing':147 '/readme':149 '0.02':96,127 '000':87 '0x8335':66 '160':42 '20':86 '2913':67 '6':92 'accept':49 'access':34,81 'advertis':103 'ai/ml':111 'analysi':114 'analyt':110 'api':80,107,132 'application/json':54 'avail':176 'base':8,22,61,88 'base network api' 'behavior':179 'behind':43 'broader':100 'call':12,26 'challeng':200 'classif':116 'commit':139 'confirm':207 'connect':155 'contract':65 'cost':83 'crypto payment endpoint' 'data':109,119,192 'decim':93 'detail':162 'document':140,171,197 'embed':117 'endpoint':6,20,30,48,75,184,209 'equal':95 'exact':71,178 'exampl':174 'expect':188 'extrem':142 'feed':120 'finance/crypto':118 'form':206 'gate':3,17 'id':41 'infer':112 'infrastructur':122 'input':186 'invoic':5,19,38,40,183,191 'json-response' 'key':133 'label':78 'limit':136 'live':202 'lowpaymentfee' 'lowpaymentfee.com':32,101 'network':62 'no-api-key' 'openapi':166 'oper':211 'page':150 'paid':9,23 'pay-per-call api' 'payload':175 'payment':56 'paywal':46 'per':11,25,97,128 'per-cal':10,24 'per-request-billing' 'platform':102 'post':50 'premium':79 'price':125 'prompt':157 'provid':33 'rate':135 'render':152 'request':51,98,129 'request/response':169 'resourc':39 'respons':55 'return':53,194 'schema':170 'scheme':72 'sentiment':113 'settl':58 'span':108 'spars':143 'spec':167 'specif':74 'stripe':4,18,37,182 'stripe invoice api' 'stripe-invoices' 'suit':105 'summar':115 'technic':161 'unit':89 'usdc':14,28,64,91 'usdc micropayment api' 'usdc-base-network' 'use':63 'util':123 'via':68 'wallet':156 'well':205 'well-form':204 'x402':2,16,45,70,199 'x402 paid api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"2ffaa786-cd0a-4a72-8ec1-5ae95d81c056","listingId":"7f12169b-0a6f-47d4-912c-fcd9035ecd06","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/stripe/invoices/160","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:36.656Z"}],"sources":[{"listingId":"7f12169b-0a6f-47d4-912c-fcd9035ecd06","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/160","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:36.656Z","lastSeenAt":"2026-04-22T21:31:28.716Z"}],"details":{"listingId":"7f12169b-0a6f-47d4-912c-fcd9035ecd06","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/160\n# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment to access.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge accepting USDC on Base network, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/160"},{"claim":"Platform advertises $0.02 per request pricing 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/stripe/invoices/160"}],"useCases":["Retrieving Stripe invoice data via a pay-per-call model without API key management","Programmatic access to invoice #160 details settled in USDC on Base","Agent-driven invoice retrieval where payment is handled inline via x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-use access to Stripe invoice data","AI agents that can settle x402 payments in USDC on Base","Prototyping micropayment-gated API workflows"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Bulk invoice retrieval across many invoice IDs (only invoice 160 is exposed at this path)","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.087Z"},"updatedAt":"2026-04-22T21:31:28.716Z"}}