{"id":"1a070eab-0c21-4dcb-919d-a8cd18deb47d","shortId":"jfuSxt","kind":"x402","title":"Get BDX market quotes via x402 micropayment on Base for $0.02 per request.","tagline":"Get BDX market quotes via x402 micropayment on Base for $0.02 per request.","description":"This endpoint provides market quote data for BDX (Beldex) via the x402 payment protocol. It is part of a broader API platform at lowpaymentfee.com that offers data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated behind per-request x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/market/quote/BDX` returns a JSON response with market quote information for the BDX token. Payment is handled inline: callers attach an `X-PAYMENT` header with a valid x402 payment proof. The cost is $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — access is instant once payment is provided.\n\nDocumentation on the site is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format beyond the MIME type `application/json`. The endpoint is confirmed live (returns a proper 402 challenge on POST), but the lack of documentation means callers must discover the response schema empirically.","tags":[],"capabilities":["market-quote","crypto-data","x402-payment","usdc-base","per-request-pricing","no-api-key","bdx-token"],"categories":["finance","crypto"],"synonyms":["BDX price","Beldex quote","crypto market data","token price API","BDX market data","x402 crypto API","micropayment API"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or JSON schema describing request parameters or response format.","Response structure for /api/v1/market/quote/BDX must be discovered empirically.","The broader platform lists many endpoints (AI, analytics, finance, utils) but none have documented schemas — quality of underlying services is unverifiable."],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/BDX","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/BDX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no example requests or responses, and the site's docs/pricing/API pages are all blank beyond a wallet connect prompt. The actual response format for BDX quotes is completely 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'0.02':11,24,113 '000':117 '20':116 '402':197 '6':123 'BDX market data' 'BDX price' 'Beldex quote' 'access':135 'addit':165 'ai/ml':55 'analyt':54 'api':47,126,152 'application/json':188 'attach':98 'base':9,22,75,118 'bdx':2,15,34,91 'bdx-token' 'behind':64 'beldex':35 'beyond':184 'broader':46 'caller':97,207 'challeng':198 'commit':132 'confirm':192 'connect':160 'cost':111 'crypto market data' 'crypto-data' 'data':32,53,58 'decim':124 'descript':179 'detail':167 'discov':209 'doc':150 'document':142,205 'empir':213 'endpoint':28,79,190 'exampl':174 'extrem':147 'finance/web3':57 'format':183 'gate':63 'get':1,14 'handl':95 'header':103 'infer':56 'inform':88 'inlin':96 'instant':137 'json':83 'key':127 'lack':203 'limit':129 'live':193 'lowpaymentfee.com':50 'market':3,16,30,86 'market-quote' 'mean':206 'micropay':7,20,69 'micropayment API' 'mime':186 'must':208 'network':76 'no-api-key' 'offer':52 'openapi':171 'page':155 'part':43 'payload':176 'payment':39,93,102,108,139 'per':12,25,66,114 'per-request':65 'per-request-pricing' 'platform':48 'post':200 'price':151 'prompt':162 'proof':109 'proper':196 'protocol':40 'provid':29,141 'quot':4,17,31,87 'rate':128 'readm':154 'render':157 'request':13,26,67,115 'request/response':175 'requir':134 'respons':84,182,211 'return':81,194 'schema':172,212 'servic':61 'settl':70 'site':145 'spars':148 'specif':78 'technic':166 'token':92 'token price API' 'type':187 'unit':119 'upfront':131 'usdc':72,121 'usdc-base' 'util':60 'valid':106 'via':5,18,36 'wallet':161 'x':101 'x-payment':100 'x402':6,19,38,68,107 'x402 crypto API' 'x402-payment'","prices":[{"id":"4427d0cf-5d3a-45a1-b3d2-9d00ebd8f73d","listingId":"1a070eab-0c21-4dcb-919d-a8cd18deb47d","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/BDX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:55.638Z"}],"sources":[{"listingId":"1a070eab-0c21-4dcb-919d-a8cd18deb47d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/BDX","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:55.638Z","lastSeenAt":"2026-04-23T20:01:28.849Z"}],"details":{"listingId":"1a070eab-0c21-4dcb-919d-a8cd18deb47d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/BDX \\\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 requesting USDC payment on Base network with maxAmountRequired of 20000 base units (=$0.02).","source_url":"https://lowpaymentfee.com/api/v1/market/quote/BDX"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/market/quote/BDX"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt with no additional content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching real-time BDX (Beldex) market quotes for trading bots or dashboards","Integrating pay-per-call crypto price data into agent workflows without API key management","Building portfolio trackers that pull token quotes on demand"],"bestFor":["Agents or bots needing on-demand BDX market quotes without subscription overhead","Developers experimenting with x402 micropayment-gated APIs","Low-volume crypto data consumers who prefer pay-per-use pricing"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing comprehensive multi-token market data in a single call","Anyone requiring detailed API documentation or guaranteed response schemas before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:30:33.722Z"},"updatedAt":"2026-04-23T20:01:28.849Z"}}