{"id":"dedd3f6e-a109-473c-9cfd-da520df49a31","shortId":"zFLhRA","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 specific Stripe invoice resource (invoice ID 198) behind an x402 paywall. The endpoint accepts POST requests and returns JSON. 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/198` is listed as \"Premium API Access\" and costs up to 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). This is consistent with the site-wide pricing of $0.02 per request advertised on the provider's landing page. The provider offers a broader catalog of APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all at the same $0.02/request price point and all gated via x402 on Base.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, 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 of what the Stripe invoice endpoint actually returns. The endpoint is confirmed live (returns a valid 402 challenge), but without documentation it is unclear what data the invoice endpoint provides or what POST body it expects.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice-data","json-response","per-call-pricing"],"categories":["finance","payments"],"synonyms":["stripe invoice API","x402 invoice endpoint","pay-per-call invoice","USDC gated API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No API documentation available; all doc pages render only 'Connect wallet'","No OpenAPI or schema definition found","Unknown request body format — no input schema documented","Unknown response format — no output examples or schema available","Single-resource endpoint (invoice 198) with no explanation of what data it returns","Provider site appears to be a demo or early-stage project with minimal content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/198","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/198","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 essentially nonexistent — every doc page shows only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The specific purpose of the Stripe invoice endpoint is unclear beyond its 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'/api/v1/stripe/invoices/198':76 '/docs':158 '/pricing':159 '/readme':162 '/request':143 '0.02':95,110,142 '000':88 '0x8335':66 '198':43 '20':87 '2913':67 '402':203 '6':98 'Base network API' 'USDC gated API' 'accept':50 'access':34,82 'actual':193 'advertis':113 'ai/ml':131 'analyt':130 'api':81,127 'base':8,22,61,89,152 'base-network' 'behind':44 'bodi':220 'broader':124 'call':12,26 'catalog':125 'challeng':204 'confirm':198 'connect':168 'consist':102 'content':174 'contract':65 'cost':84 'crypto payment API' 'data':129,134,212 'decim':99 'document':153,183,207 'endpoint':6,20,30,49,75,192,196,215 'equal':94 'exact':71 'exampl':186 'expect':222 'extrem':155 'finance/web3':133 'gate':3,17,148 'id':42 'infer':132 'infrastructur':136 'invoic':5,19,39,41,191,214 'json':55 'json-response' 'land':118 'list':78 'live':199 'lowpaymentfee' 'lowpaymentfee.com':32 'network':62 'offer':122 'openapi':178 'page':119,163 'paid':9,23 'pay-per-call invoice' 'payment':56 'paywal':47 'per':11,25,111 'per-cal':10,24 'per-call-pricing' 'point':145 'post':51,219 'premium':80 'price':108,144 'prompt':170 'provid':33,116,121,216 'render':165 'request':52,112 'request/response':181 'resourc':40 'return':54,194,200 'schema':182 'scheme':72 'settl':58 'site':106 'site-wid':105 'span':128 'spars':156 'spec':179 'specif':37,74 'stripe':4,18,38,190 'stripe invoice API' 'stripe-invoice-data' 'unclear':210 'unit':90 'usdc':14,28,64,92,96 'usdc-settlement' 'use':63,97 'util':137 'valid':202 'via':68,149 'wallet':169 'wide':107 'without':206 'x402':2,16,46,70,150 'x402 invoice endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"5d2bd359-4441-4f7d-b897-98f04c100f5a","listingId":"dedd3f6e-a109-473c-9cfd-da520df49a31","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/198","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:55.318Z"}],"sources":[{"listingId":"dedd3f6e-a109-473c-9cfd-da520df49a31","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/198","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:55.318Z","lastSeenAt":"2026-04-22T20:01:29.126Z"}],"details":{"listingId":"dedd3f6e-a109-473c-9cfd-da520df49a31","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/198 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 USDC base units on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/198"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/198"},{"claim":"Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving Stripe invoice data (invoice 198) via a single micropayment","Agent-driven invoice lookups without API key management","Programmatic access to invoice details settled in USDC on Base"],"bestFor":["Agents or bots that need keyless, pay-per-call access to invoice data","Developers experimenting with x402 payment flows on Base","Scenarios where avoiding API key provisioning is valuable"],"notFor":["Bulk invoice retrieval or batch processing (single invoice endpoint only)","Users who need detailed API documentation or guaranteed SLAs","Production workflows requiring well-documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.121Z"},"updatedAt":"2026-04-22T20:01:29.126Z"}}