{"id":"541b8dc2-643b-4b30-959c-2ca17b75a913","shortId":"ZmbVTC","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints share a uniform pricing model of $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/charges/22` accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the payment parameters (asset, network, payTo address), attach an `X-PAYMENT` header with a valid payment proof, and receive the API response. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are required.\n\nThe platform advertises a broad catalog of endpoints (metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation), but the crawled documentation pages were essentially empty beyond wallet-connect prompts. There is no OpenAPI schema, no detailed request/response documentation, and no examples available from the crawl. The exact functionality behind this particular `/stripe/charges/22` path is unclear — the name suggests it may relate to Stripe charge data or a proxy for Stripe operations, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base-network","per-request-billing","json-response","post-method","no-api-key","no-rate-limits"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","pay-per-call API","USDC micropayment API","Base network API","stripe charges API"],"warnings":["No OpenAPI or request/response schema available","Documentation pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no actual content","The exact purpose and functionality of /api/v1/stripe/charges/22 is undocumented — the 'Premium API Access' label is generic","The broad catalog of endpoints listed on the homepage may be placeholder/demo content; no verification of actual functionality was possible"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/22","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and the documentation pages are empty stubs. The actual functionality of this specific endpoint (/stripe/charges/22) is undocumented and 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'/stripe/charges/22':221 '0.02':10,24,79,150 '000':141 '20':140 '402':109 '6':146 'Base network API' 'USDC micropayment API' 'accept':93 'access':6,20,36 'address':118 'advertis':163 'ai':63 'amount':137 'analysi':172 'analyt':62 'api':5,19,35,58,133,152 'application/json':98 'asset':115 'attach':119 'avail':211 'base':8,22,87,142 'behind':37,218 'beyond':194 'broad':165 'caller':106 'catalog':166 'categori':59 'challeng':110 'charg':233 'classif':175 'commit':158 'connect':197 'contain':111 'convers':183 'crawl':188,214 'data':61,234 'decim':147 'detail':205 'document':189,207 'embed':176 'empti':193 'endpoint':30,47,72,91,168 'equal':149 'essenti':192 'exact':216 'exampl':210 'exchang':179 'feed':178 'financ':66 'function':217 'gate':3,17 'generat':185 'geocod':181 'handl':101 'header':124 'host':54 'includ':60 'infrastructur':69 'json-response' 'key':153 'learn':65 'limit':155 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'mani':46 'max':136 'may':229 'metric':169 'model':77 'name':226 'network':88,116 'no-api-key' 'no-rate-limits' 'offer':48 'one':44 'openapi':202 'oper':240 'page':190 'paramet':114 'particular':220 'path':222 'pay':9,23 'pay-per-call API' 'payment':40,99,113,123,128 'payto':117 'per':11,25,80 'per-request-billing' 'platform':52,162 'post':94 'post-method' 'premium':4,18,34 'price':76,177 'prompt':198 'proof':129 'protocol':105 'provid':33 'proxi':237 'rate':154,180 'receiv':107,131 'relat':230 'report':170 'request':12,26,81,95 'request/response':206 'requir':138,160 'respons':134 'return':97 'schema':203 'sentiment':171 'settl':82 'share':73 'specif':90 'specul':244 'stripe':232,239 'stripe charges API' 'suggest':227 'summar':174 'text':173 'unclear':224 'uniform':75 'unit':143 'upfront':157 'usdc':14,28,84,145 'usdc-base-network' 'util':70 'valid':127,182 'varieti':56 'via':102 'wall':41 'wallet':196 'wallet-connect':195 'web3':67 'x':122 'x-payment':121 'x402':2,16,39,104 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"c624958c-a4e8-4463-9a30-043d309ce58a","listingId":"541b8dc2-643b-4b30-959c-2ca17b75a913","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:19.237Z"}],"sources":[{"listingId":"541b8dc2-643b-4b30-959c-2ca17b75a913","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/22","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:19.237Z","lastSeenAt":"2026-04-23T00:32:07.452Z"}],"details":{"listingId":"541b8dc2-643b-4b30-959c-2ca17b75a913","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/22 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/22"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/22"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic access to a pay-as-you-go endpoint catalog"],"bestFor":["Developers wanting zero-commitment, pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.877Z"},"updatedAt":"2026-04-23T00:32:07.452Z"}}