{"id":"52c9ce16-c1e5-49f6-bbe2-cbdc3e09cff4","shortId":"PPAhL2","kind":"x402","title":"Pay-per-call market quote endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call market quote endpoint on Base via x402, settling in USDC at $0.02/request.","description":"The `/api/v1/market/quote/PM` endpoint on lowpaymentfee.com provides premium market quote data, accessible via the x402 payment protocol. Each request costs $0.02, paid in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each POST request.\n\nThis endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all at the same $0.02/request price point. The specific `/market/quote/PM` path suggests it returns a market quote for a \"PM\" symbol or asset, though the exact response schema is not documented.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds. No OpenAPI spec, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["market-quote","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","crypto"],"synonyms":["market quote API","price quote","PM quote","x402 market data","crypto quote endpoint","USDC pay-per-call","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Docs, pricing, API, and README pages all render only 'Connect wallet' with no usable content","The 'PM' path segment is unexplained; it is unclear what asset or market it refers to","No example responses were found anywhere in the crawl"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/PM","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/market/quote/PM","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), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty. The meaning of 'PM' in the path is undocumented. This is effectively a stub listing with a confirmed live payment 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'/market/quote/pm':121 '/request':17,34,116 '0.02':16,33,54,115,175 '000':171 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':159 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':162 '20':170 '300':185 '6':179 'PM quote' 'USDC pay-per-call' 'accept':151 'access':45 'address':158 'ai/ml':104 'amount':167 'analyt':103 'api':63,100,204 'asset':134 'attach':74 'base':9,26,60,164,172 'base-network' 'broader':89 'call':4,21,99 'caller':72 'challeng':145 'commit':69 'confirm':146 'connect':210 'content':216 'cost':53 'crawl':199 'crypto quote endpoint' 'data':44,102,107 'decim':180 'detail':190 'doc':201 'document':142,191 'dozen':94 'endpoint':7,24,37,84,148 'exact':137 'exampl':193 'finance/web3':106 'found':196 'given':176 'header':78 'i.e':174 'infer':105 'key':64 'limit':66 'live':150 'lowpaymentfee' 'lowpaymentfee.com':39,91 'market':5,22,42,127 'market quote API' 'market-quote' 'maximum':166 'network':61 'no-api-key' 'offer':93 'openapi':188 'page':205 'paid':55 'part':86 'path':122 'pay':2,19,97 'pay-per-cal':1,18,96 'pay-per-request' 'payment':49,77,156,182 'per':3,20,98 'platform':90 'pm':131 'point':118 'post':81,152 'post-endpoint' 'premium':41 'price':117,202 'price quote' 'prompt':212 'protocol':50 'provid':40 'quot':6,23,43,128 'rate':65 'render':207 'request':52,82,153 'requir':71,168 'respons':138,194 'return':125 'schema':139 'second':186 'servic':110 'settl':12,29,155 'simpli':73 'span':101 'spec':189 'specif':120 'suggest':123 'symbol':132 'though':135 'timeout':183 'unit':173 'upfront':68 'usdc':14,31,57,161,177 'usdc-settlement' 'use':160 'util':109 'via':10,27,46 'wallet':211 'x402':11,28,48,76,144 'x402 market data' 'x402-payment'","prices":[{"id":"abf71150-d520-4d0e-8193-49c52a8079ed","listingId":"52c9ce16-c1e5-49f6-bbe2-cbdc3e09cff4","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/market/quote/PM","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:27.681Z"}],"sources":[{"listingId":"52c9ce16-c1e5-49f6-bbe2-cbdc3e09cff4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/PM","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:27.681Z","lastSeenAt":"2026-04-24T10:32:03.127Z"}],"details":{"listingId":"52c9ce16-c1e5-49f6-bbe2-cbdc3e09cff4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/PM \\\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":"Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/PM"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/PM"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching a real-time market quote for the PM asset/symbol","Integrating pay-per-call market data into trading bots or dashboards","Agent-driven market data retrieval without API key management","On-demand price lookups settled in USDC on Base"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go market quotes","AI agents that can settle x402 payments autonomously","Projects already operating on the Base L2 with USDC"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integrating","High-frequency trading requiring sub-second latency guarantees","Anyone who needs non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.651Z"},"updatedAt":"2026-04-24T10:32:03.127Z"}}