{"id":"01738918-d7ef-47d1-b8af-5410e728d1da","shortId":"CPb8Bh","kind":"x402","title":"Get the current price of ZRX (0x Protocol) token via a pay-per-call x402 endpoint on Base.","tagline":"Get the current price of ZRX (0x Protocol) token via a pay-per-call x402 endpoint on Base.","description":"This endpoint returns the current price of the ZRX (0x Protocol) token. It is part of a broader suite of APIs hosted at lowpaymentfee.com that cover data analytics, AI/ML inference, finance, crypto, and utility services — all accessible via the x402 payment protocol on the Base network.\n\nThe endpoint accepts POST requests and is gated by an x402 payment challenge. Each call costs $0.02 in USDC (USD Coin) on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). There are no API keys, no rate limits, and no subscriptions — you pay per request with an on-chain micropayment. The x402 challenge specifies a maximum amount of 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nDocumentation beyond the landing page is 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. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response schema for a paid request is unknown.","tags":[],"capabilities":["token-price-lookup","x402-payment","usdc-micropayment","base-network","crypto-market-data","pay-per-request"],"categories":["crypto","finance"],"synonyms":["ZRX price","0x token price","crypto price API","token price feed","ZRX market data","x402 crypto API","micropayment API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All doc pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no technical content","No example request or response payloads are available to verify what the endpoint actually returns","The broader lowpaymentfee.com platform lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at $0.02 — the depth and quality of each is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/ZRX/price","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/tokens/ZRX/price","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 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no example payloads, and all documentation pages return only a wallet-connect prompt. The listing is effectively a stub with confirmed 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'/docs':158 '/pricing':159 '/readme':162 '0.02':101,149 '000':140 '0x':7,26,48 '0x token price' '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':109 '20':139 '402':200 '6':145 'ZRX market data' 'ZRX price' 'accept':87 'access':75 'actual':204 'addit':173 'ai/ml':67 'amount':137 'analyt':66 'api':59,113 'base':19,38,83,107,141 'base-network' 'beyond':151 'broader':56 'call':15,34,99 'chain':129 'challeng':97,133,201 'coin':105 'confirm':195 'connect':168 'contract':108 'cost':100 'cover':64 'crypto':70 'crypto price API' 'crypto-market-data' 'current':3,22,43 'data':65 'decim':146 'descript':187 'detail':175 'document':150 'endpoint':17,36,40,86,193 'equal':148 'exampl':182 'financ':69 'format':191 'gate':92 'get':1,20 'host':60 'infer':68 'key':114 'land':153 'limit':117 'live':196 'lowpaymentfee.com':62 'maximum':136 'micropay':130 'micropayment API' 'network':84 'on-chain':127 'openapi':179 'page':154,163 'paid':209 'part':53 'pay':13,32,122 'pay-per-cal':12,31 'pay-per-request' 'payload':184 'payment':79,96 'per':14,33,123 'post':88 'price':4,23,44 'prompt':170 'proper':199 'protocol':8,27,49,80 'rate':116 'render':165 'request':89,124,210 'request/response':183 'respons':190,205 'return':41,197 'schema':180,206 'servic':73 'spars':156 'specifi':134 'subscript':120 'suit':57 'technic':174 'token':9,28,50 'token price feed' 'token-price-lookup' 'unit':142 'unknown':212 'usd':104 'usdc':103,144 'usdc-micropayment' 'util':72 'via':10,29,76 'wallet':169 'x402':16,35,78,95,132 'x402 crypto API' 'x402-payment' 'zrx':6,25,47","prices":[{"id":"f24025ca-a303-4512-a8d6-089465499e39","listingId":"01738918-d7ef-47d1-b8af-5410e728d1da","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/tokens/ZRX/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:26.730Z"}],"sources":[{"listingId":"01738918-d7ef-47d1-b8af-5410e728d1da","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/ZRX/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:26.730Z","lastSeenAt":"2026-04-23T19:01:40.593Z"}],"details":{"listingId":"01738918-d7ef-47d1-b8af-5410e728d1da","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/ZRX/price \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/ZRX/price"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/ZRX/price"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching the current ZRX token price for portfolio tracking or trading bots","Integrating real-time ZRX pricing into a DeFi dashboard","Agent-driven price lookups without API key management","On-demand crypto price checks with per-call micropayments"],"bestFor":["AI agents or bots that need on-demand ZRX price data without managing API keys","Developers wanting frictionless pay-per-call crypto price access on Base","Low-volume or sporadic price lookups where subscriptions are overkill"],"notFor":["High-frequency trading requiring sub-second latency and bulk pricing (per-call payment overhead may be prohibitive)","Users who need historical price data or OHLCV candles (no evidence this endpoint provides that)","Anyone without a Base-compatible wallet or USDC balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.816Z"},"updatedAt":"2026-04-23T19:01:40.593Z"}}