{"id":"b9b5d572-0547-4af1-8521-e16e239a0cd1","shortId":"PnQzkr","kind":"x402","title":"x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.","tagline":"x402-gated premium API access on Base, paid per-call in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall, settling payments in USDC on the Base network. The specific resource path `/api/v1/stripe/charges/172` suggests a Stripe-related charges endpoint, though the crawled documentation does not describe this particular route in detail. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (0.02 USD) per call.\n\nThe broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payments settle on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\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 specific behavior of the `/api/v1/stripe/charges/172` route (what it returns, what input it expects) is unknown from the available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key","post-endpoint"],"categories":["payments","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","stripe charges API","crypto-paid endpoint"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /docs, /pricing, /api, and /README pages all render only 'Connect wallet' with no usable content","The specific behavior and expected input/output of /api/v1/stripe/charges/172 is unknown","The route path references 'stripe/charges' which may imply Stripe integration, but no details are provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/172","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/charges/172","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 via a valid x402 402 challenge, and pricing is clear ($0.02 USDC per call). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of this particular route (/api/v1/stripe/charges/172) is undocumented. This is effectively a stub 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'/api/v1/stripe/charges/172':59,221 '/docs':184 '/pricing':186 '/readme':188 '/request':17,34 '0.02':16,33,102,155 '000':97 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':178 '20':96 'Base network API' 'USDC micropayment API' 'accept':87 'access':6,23,42 'advertis':110 'ai':123 'analysi':127 'analyt':117 'api':5,22,41,114,160 'avail':215,234 'base':8,25,53,98,173 'base-network' 'behavior':218 'behind':43 'broader':107 'call':12,29,105 'challeng':81 'charg':65 'classif':130 'commit':168 'confirm':82 'connect':194 'contract':177 'convers':147 'crawl':69 'crypto-paid endpoint' 'data':116,120 'describ':73 'detail':78,201 'document':70,179,210 'embed':131 'endpoint':36,66,84,150 'estim':141 'exampl':213 'exchang':136 'expect':229 'export':121 'extrem':181 'feed':135 'financ':132 'gas':140 'gate':3,20 'generat':148 'geocod':145 'infrastructur':143 'input':227 'insight':122 'key':161 'learn':125 'limit':164 'live':86 'lowpaymentfee' 'lowpaymentfee.com':38,108 'machin':124 'materi':235 'maximum':93 'metric':118 'minimum':167 'network':54,174 'no-api-key' 'openapi':205 'page':189 'paid':9,26 'particular':75 'path':58 'pay-per-call API' 'payload':214 'payment':48,94,169 'paywal':46 'per':11,28,104,156 'per-cal':10,27 'per-call-pricing' 'platform':109 'post':88 'post-endpoint' 'premium':4,21,40 'price':134,153 'prompt':196 'provid':39 'quot':139 'rate':137,163 'relat':64 'render':191 'report':119 'request':89,157 'request/response':208 'requir':91 'resourc':57 'return':225 'rout':76,222 'schema':209 'sentiment':126 'settl':47,170 'span':115 'spars':182 'spec':206 'specif':56,217 'stripe':63 'stripe charges API' 'stripe-rel':62 'suggest':60 'suit':112 'summar':129 'technic':200 'text':128 'though':67 'token':138 'uniform':152 'unit':99 'unknown':231 'usd':103 'usdc':14,31,50,101,176 'usdc-settlement' 'use':175 'util':144 'valid':146 'wallet':195 'web3':133 'x402':2,19,45,80 'x402 API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"a269117f-201b-42ab-a904-81ed0019dc2e","listingId":"b9b5d572-0547-4af1-8521-e16e239a0cd1","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/charges/172","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:04.642Z"}],"sources":[{"listingId":"b9b5d572-0547-4af1-8521-e16e239a0cd1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/172","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:04.642Z","lastSeenAt":"2026-04-23T02:01:29.282Z"}],"details":{"listingId":"b9b5d572-0547-4af1-8521-e16e239a0cd1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/172 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/172"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/172"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API resource without traditional API key management","Agent-driven workflows that need to pay per-call in USDC on Base","Integrating x402-compatible payment flows into automated pipelines"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC payments on Base L2","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Production workloads requiring guaranteed SLAs or support","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:56.48Z"},"updatedAt":"2026-04-23T02:01:29.282Z"}}