{"id":"bc014ba0-9763-4590-b7cb-24410bdb4421","shortId":"52bTae","kind":"x402","title":"Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","tagline":"Pay-per-request API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/call.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/crypto market data, and general utility services. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint at `/api/v1/orders/64` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises a uniform $0.02/request pricing across all its endpoints.\n\nThe broader platform lists endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation. However, documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no substantive content, so the actual behavior, input schemas, and response formats for these endpoints remain undocumented in the crawled material. The specific functionality behind the `/api/v1/orders/64` path is unclear — the name \"Premium API Access\" is generic and no input/output schema details are available beyond the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","no-api-key","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","geocoding","utility-services"],"categories":["api-platform","llm","finance","geo"],"synonyms":["pay-per-call API","x402 API","USDC API","Base network API","micropayment API","lowpaymentfee","crypto-paid API","serverless API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","No OpenAPI or input/output schema provided for any endpoint","The specific functionality of /api/v1/orders/64 ('Premium API Access') is unclear and may be a generic or placeholder endpoint","The broad catalog of endpoints (AI, finance, data, utils) is advertised but none have verifiable documentation or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/64","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/orders/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no input/output schema, and no examples for this or any endpoint. The docs, pricing, API, and README pages all returned only 'Connect wallet' with no content. The specific purpose of /api/v1/orders/64 is unknown beyond the generic label 'Premium API 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'limit':85 'list':97,147 'lowpaymentfee' 'lowpaymentfee.com':39 'market':60 'materi':204 'maximum':111 'metadata':232 'micropayment API' 'minimum':88 'name':215 'network':78 'no-api-key' 'offer':48 'page':172,176 'paid':69 'path':211 'pay':2,21 'pay-per-call API' 'pay-per-request':1,20 'per':3,22,71,126 'per-request':70 'per-request-billing' 'platform':6,25,46,133,146 'post':104 'premium':99,216 'price':139,156 'prompt':182 'quot':161 'rate':84,159 'remain':199 'request':4,23,72,105,127 'requir':90 'respons':194 'return':177 'schema':192,224 'sentiment':150 'sentiment-analysis' 'serverless API' 'servic':65 'span':54 'specif':92,206 'substant':185 'summar':153 'text':152 'text-summarization' 'token':160 'unclear':213 'undocu':200 'uniform':136 'unit':117 'usdc':74,119,128 'usdc-base' 'use':73,129 'util':15,34,64 'utility-services' 'valid':165 'via':9,28 'wallet':181 'x402':10,29,43,107,230 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"9ffc35fb-fee9-42b8-8a91-e092c2f10fe3","listingId":"bc014ba0-9763-4590-b7cb-24410bdb4421","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/orders/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:22.522Z"}],"sources":[{"listingId":"bc014ba0-9763-4590-b7cb-24410bdb4421","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/64","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:22.522Z","lastSeenAt":"2026-04-23T21:31:33.957Z"}],"details":{"listingId":"bc014ba0-9763-4590-b7cb-24410bdb4421","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/64 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform pricing of $0.02 per request across all endpoints","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base for /api/v1/orders/64","source_url":"https://lowpaymentfee.com/api/v1/orders/64"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/orders/64"},{"claim":"Platform lists endpoints for analytics, AI/ML, finance/crypto, and utility services","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time crypto token quotes and gas estimates on a per-call basis","Running geocoding or data validation requests with instant USDC micropayments","Exporting data or generating analytics reports via pay-as-you-go endpoints"],"bestFor":["Developers who want zero-friction API access without signup or API keys","Agents and bots that can settle payments in USDC on Base automatically via x402","Projects needing low-cost, pay-per-use access to a variety of utility and AI endpoints"],"notFor":["Users who need detailed API documentation, input schemas, or guaranteed SLAs","Applications requiring high-throughput bulk access where per-request pricing is inefficient","Users without a Base-compatible USDC wallet or x402 payment capability"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.854Z"},"updatedAt":"2026-04-23T21:31:33.957Z"}}