{"id":"5447b8c5-5d23-4b2d-a96e-00eabd1b8380","shortId":"bPQmYa","kind":"x402","title":"Get the current ETH token price via x402 micropayment on Base for $0.02 per request.","tagline":"Get the current ETH token price via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns the current price of ETH in a pay-per-call model using the x402 protocol. Payment is settled in USDC on the Base network, with each request costing $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to receive a JSON response.\n\nThe endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced uniformly at $0.02 per request. The specific endpoint `/api/v1/tokens/ETH/price` falls under the Finance & Web3 category and is designed to return real-time ETH price data. The x402 challenge confirms the endpoint is live, accepts POST requests, and responds with application/json.\n\nDocumentation on the site is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint's behavior must be inferred entirely from the x402 challenge and the landing page listing.","tags":[],"capabilities":["token-price-feed","eth-price","x402-micropayment","usdc-payment","base-network","pay-per-request","no-api-key","real-time-data"],"categories":["finance","crypto"],"synonyms":["ETH price API","Ethereum price feed","token price lookup","crypto price endpoint","ETH USD price","x402 price API","micropayment price feed"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","Docs, pricing, and API pages on the site render only 'Connect wallet' with no technical content","No example request or response payloads could be found","The specific endpoint /api/v1/tokens/ETH/price is not listed on the landing page (landing page lists /api/v1/finance/prices and /api/v1/crypto/quotes instead), so its exact behavior is uncertain"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/ETH/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/ETH/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge confirms the endpoint is live and reveals pricing and payment details, but there is no OpenAPI spec, no documented request/response schema, and no example payloads. The docs pages are empty beyond a wallet-connect prompt. Most details must be inferred, making this effectively a stub 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'0.02':13,28,65,129 '000':67 '20':66 '6':73 'ETH USD price' 'ETH price API' 'Ethereum price feed' 'accept':161 'ai/ml':118 'analyt':117 'api':76,111,179 'application/json':167 'attach':85 'base':11,26,59,68 'base-network' 'behavior':212 'broader':108 'call':46 'caller':83 'categori':141 'challeng':155,220 'confirm':156 'connect':185 'cost':64 'crypto price endpoint' 'current':3,18,37 'data':116,121,152 'decim':74 'descript':204 'design':144 'detail':192 'doc':176 'document':168 'endpoint':32,103,134,158,210 'entir':216 'eth':4,19,40,150 'eth-price' 'exampl':199 'extrem':173 'fall':136 'financ':139 'finance/web3':120 'get':1,16 'header':90 'infer':119,215 'json':100 'key':77 'land':223 'limit':80 'list':225 'live':160 'lowpaymentfee.com':34,114 'micropay':9,24 'micropayment price feed' 'model':47 'must':213 'network':60 'no-api-key' 'offer':112 'openapi':196 'page':180,224 'part':105 'pay':44 'pay-per-cal':43 'pay-per-request' 'payload':201 'payment':52,89,95 'per':14,29,45,130 'post':162 'price':6,21,38,126,151,177 'prompt':187 'proof':96 'protocol':51 'rate':79 'real':148 'real-tim':147 'real-time-data' 'receiv':98 'render':182 'request':15,30,63,131,163 'request/response':200 'requir':82 'respond':165 'respons':101,207 'return':35,146 'schema':208 'servic':124 'settl':54 'simpli':84 'site':171 'span':115 'spars':174 'spec':197 'specif':133 'suit':109 'technic':191 'time':149 'token':5,20 'token price lookup' 'token-price-feed' 'uniform':127 'unit':69 'usdc':56,71 'usdc-payment' 'use':48 'util':123 'valid':93 'via':7,22 'wallet':186 'web3':140 'x':88 'x-payment':87 'x402':8,23,50,94,154,219 'x402 price API' 'x402-micropayment'","prices":[{"id":"d1a3e366-d142-4359-b0a3-3b8ed9f578d4","listingId":"5447b8c5-5d23-4b2d-a96e-00eabd1b8380","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/ETH/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":"2026-04-18T18:34:25.689Z"}],"sources":[{"listingId":"5447b8c5-5d23-4b2d-a96e-00eabd1b8380","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/ETH/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:25.689Z","lastSeenAt":"2026-04-23T20:01:31.635Z"}],"details":{"listingId":"5447b8c5-5d23-4b2d-a96e-00eabd1b8380","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/ETH/price \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/tokens/ETH/price"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02","source_url":"https://lowpaymentfee.com/api/v1/tokens/ETH/price"},{"claim":"All APIs on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching the current ETH price for a trading bot or portfolio tracker","Agents that need on-demand crypto price data without managing API keys","Integrating real-time ETH pricing into a DeFi application or dashboard","Automated workflows that require spot-check token valuations"],"bestFor":["AI agents needing keyless, pay-per-call ETH price data","Developers prototyping crypto apps who want instant API access without signup","Low-volume or bursty price lookups where subscription plans are overkill"],"notFor":["High-frequency trading requiring sub-second latency and websocket streams","Historical price data or OHLCV candle queries (no evidence this is supported)","Users who need detailed response schema documentation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:01:28.772Z"},"updatedAt":"2026-04-23T20:01:31.635Z"}}