{"id":"be7634dc-a6db-4990-a25e-815ee831d329","shortId":"cpfB46","kind":"x402","title":"x402-gated premium API endpoint on Base, payable in USDC per request.","tagline":"x402-gated premium API endpoint on Base, payable in USDC per request.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/stripe/charges/56` is labeled \"Premium API Access\" and is gated via the x402 payment protocol. It accepts POST requests and settles payments in USDC on the Base network.\n\nThe x402 challenge indicates a maximum amount of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per request, consistent with the platform's advertised $0.02/request pricing. The platform advertises no API keys, no rate limits, and instant access — payment is the only authentication mechanism. The response MIME type is application/json.\n\nHowever, the actual functionality behind this specific endpoint path (`/stripe/charges/56`) is unclear. The path suggests it may relate to Stripe charge operations, but no documentation, input schema, or example responses are available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually returns or what input it expects, its practical utility is difficult to assess.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["payments","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","lowpaymentfee","Base network API","crypto-gated API","premium API access"],"warnings":["No documentation available — docs, API, pricing, and README pages all return only 'Connect wallet' with no content","The actual functionality of /api/v1/stripe/charges/56 is unknown; the path name is ambiguous","No input schema or example responses are provided","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/56","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/56","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no input/output schema, no example responses, and the actual functionality behind this path is unknown. The docs pages are empty beyond a wallet connect prompt. This is effectively a stub 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'/request':111 '/stripe/charges/56':146 '0.02':95,110 '000':90 '20':89 '6':100 'Base network API' 'USDC micropayment endpoint' 'accept':69 'access':59,124 'across':43 'actual':139,192 'advertis':109,115 'ai/ml':46 'amount':87 'analyt':45 'api':5,18,42,58,117,171 'application/json':136 'assess':205 'authent':129 'avail':168 'base':8,21,79,91 'base-network' 'behind':141 'broader':35 'categori':50 'challeng':83 'charg':157 'connect':180 'consist':104 'content':186 'crypto-gated API' 'data':44 'decim':101 'difficult':203 'doc':170 'document':161 'endpoint':6,19,28,53,144,191 'exampl':165 'expect':198 'finance/web3':47 'function':140 'gate':3,16,62 'howev':137 'indic':84 'infrastructur':49 'input':162,196 'instant':123 'json-response' 'key':118 'know':188 'label':56 'limit':121 'lowpaymentfee' 'lowpaymentfee.com':30 'maximum':86 'may':153 'mechan':130 'mime':133 'network':80 'no-api-key' 'offer':37 'oper':158 'page':175 'part':32 'path':145,150 'pay':39 'pay-per-call API' 'pay-per-request':38 'payabl':9,22 'payment':66,74,125 'per':12,25,40,102 'platform':36,107,114 'post':70 'practic':200 'premium':4,17,57 'premium API access' 'price':112,172 'prompt':182 'protocol':67 'rate':120 'readm':174 'relat':154 'request':13,26,41,71,103 'respons':132,166 'return':177,193 'schema':163 'settl':73 'sinc':97 'specif':52,143 'stripe':156 'substant':185 'suggest':151 'type':134 'unclear':148 'unit':92 'usd':96 'usdc':11,24,76,94,98 'usdc-settlement' 'use':99 'util':201 'via':63 'wallet':181 'without':187 'x402':2,15,65,82 'x402 API' 'x402-gated':1,14 'x402-payment'","prices":[{"id":"5b7e0834-63a6-4f1f-b73c-733daef858ca","listingId":"be7634dc-a6db-4990-a25e-815ee831d329","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/56","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:30.678Z"}],"sources":[{"listingId":"be7634dc-a6db-4990-a25e-815ee831d329","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/56","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:30.678Z","lastSeenAt":"2026-04-22T23:01:56.417Z"}],"details":{"listingId":"be7634dc-a6db-4990-a25e-815ee831d329","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/56 \\\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 x402 challenge requires a max amount of 20,000 base units of USDC (0.02 USD) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/56"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/56"},{"claim":"Docs, API, pricing, and README pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying for API access with USDC on Base without needing API keys","Integrating x402-compatible agents with pay-per-request endpoints","Testing x402 payment protocol flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that settle API calls via on-chain USDC micropayments","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["Users needing well-documented API contracts with clear input/output schemas","Production workloads requiring SLA guarantees or support","Users who cannot pay with USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.255Z"},"updatedAt":"2026-04-22T23:01:56.417Z"}}