{"id":"0c6dd02e-1197-4cb2-9149-ad32b0ff6491","shortId":"pQ7qXD","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/accounts/41` is one of many offered by the provider, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).\n\nEach request costs $0.02 in USDC (USD Coin on Base, contract 0x8335…2913). The x402 challenge confirms a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02. Payment is made inline via the X-PAYMENT header — no API keys, accounts, or rate limits are advertised. The endpoint accepts POST requests and returns application/json.\n\nThe specific functionality behind `/api/v1/accounts/41` is not documented beyond the label \"Premium API Access.\" The provider's docs, pricing, and API pages all render only a wallet-connect prompt with no additional technical documentation, OpenAPI schema, or example payloads. Without further detail on what this particular accounts endpoint returns, callers should treat it as an opaque JSON resource gated behind a $0.02 USDC payment on Base.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","crypto-payments"],"synonyms":["x402 API","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","402 payment required API","crypto-gated endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all render only a wallet-connect prompt with no content.","The specific functionality of /api/v1/accounts/41 ('Premium API Access') is not described anywhere; the endpoint purpose is unknown.","No OpenAPI or input/output schema provided; callers cannot know what request body to send or what response to expect.","No example requests or responses available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/41","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/accounts/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response payloads, and the specific purpose of /api/v1/accounts/41 is undocumented. This is effectively a stub 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'0.02':10,28,108,134,224 '000':126 '0x8335':116 '20':125 '2913':117 '402 payment required API' '6':131 'Base network API' 'USDC pay-per-call' 'accept':156 'access':6,24,44,175 'account':148,209 'addit':194 'advertis':153 'ai':80 'analysi':84 'analyt':79 'api':5,16,23,34,43,76,146,174,182 'application/json':161 'base':8,26,52,114,127,228 'behind':165,222 'beyond':170 'broad':69 'call':75 'caller':212 'catalog':70 'challeng':120 'classif':86 'coin':112 'confirm':121 'connect':190 'contract':115 'convers':103 'cost':107 'crypto-gated endpoint' 'data':78 'decim':132 'detail':204 'doc':179 'document':169,196 'embed':87 'endpoint':38,56,155,210 'equal':133 'estim':97 'exampl':200 'exchang':92 'feed':91 'financ':88 'function':164 'gas':96 'gate':3,21,221 'generat':104 'geocod':101 'header':144 'host':67 'infrastructur':99 'inlin':138 'json':219 'json-response' 'key':17,35,147 'label':172 'learn':82 'limit':151 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':81 'made':137 'mani':61 'maxamountrequir':123 'micropayment API' 'network':53 'no-api-key' 'offer':62 'one':59 'opaqu':218 'openapi':197 'page':183 'particular':208 'pay':9,27,73 'pay-per-cal':72 'pay-per-request' 'payload':201 'payment':48,135,143,226 'per':11,29,74 'post':157 'post-method' 'premium':4,22,42,173 'price':90,180 'prompt':191 'protocol':49 'provid':41,65,177 'quot':95 'rate':93,150 'render':185 'request':12,30,106,158 'requir':18,36 'resourc':220 'return':160,211 'schema':198 'sentiment':83 'span':77 'specif':55,163 'summar':85 'technic':195 'token':94 'treat':214 'unit':128 'usd':111 'usdc':14,32,110,225 'usdc-base' 'util':100 'valid':102 'via':45,139 'wallet':189 'wallet-connect':188 'web3':89 'without':202 'x':142 'x-payment':141 'x402':2,20,47,119 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"0e7eae30-9216-47c6-a03e-e38533d3dc54","listingId":"0c6dd02e-1197-4cb2-9149-ad32b0ff6491","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/accounts/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:37.779Z"}],"sources":[{"listingId":"0c6dd02e-1197-4cb2-9149-ad32b0ff6491","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/41","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:37.779Z","lastSeenAt":"2026-04-22T05:30:47.146Z"}],"details":{"listingId":"0c6dd02e-1197-4cb2-9149-ad32b0ff6491","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/41 \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/41"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/41"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","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":["Accessing premium data or account information with per-call USDC micropayments","Integrating pay-per-request APIs without managing API keys or subscriptions","Agent-driven workflows that need on-demand JSON data with inline crypto payment"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents with Base USDC wallets needing on-demand data","Prototyping integrations without committing to subscription plans"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.349Z"},"updatedAt":"2026-04-22T05:30:47.146Z"}}