{"id":"ec698cd7-4ce3-4130-a070-627223d42115","shortId":"bLv2Ww","kind":"x402","title":"Pay-per-call token data endpoint for SAND via x402 on Base network, $0.02/request in USDC.","tagline":"Pay-per-call token data endpoint for SAND via x402 on Base network, $0.02/request in USDC.","description":"This endpoint provides on-demand data for the SAND token (The Sandbox) through an x402-gated API at lowpaymentfee.com. It is part of a broader suite of Finance & Web3 endpoints offered by the same provider, which includes price feeds, exchange rates, token quotes, and gas estimates.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each request is paid individually at the time of the call.\n\nThe provider's site lists many endpoints across categories (data/analytics, AI/ML, finance/web3, infrastructure), all priced uniformly at $0.02 per request. Documentation beyond the landing page is sparse — the /docs, /api, /pricing, and /README pages all appear to require a wallet connection and provide no additional technical detail. The exact response schema for the SAND token endpoint is not documented, so the structure of the returned data must be inferred or discovered by making a paid call.","tags":[],"capabilities":["token-data","crypto-market-data","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["finance","crypto"],"synonyms":["SAND token price","The Sandbox token data","crypto token API","SAND market data","x402 crypto endpoint","pay-per-request token info"],"warnings":["No response schema or example documented — actual output structure is unknown","Documentation pages (/docs, /pricing, /README) are effectively empty","Provider identity and reliability are unclear — no terms of service or SLA visible"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/SAND","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/SAND","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live (402 challenge confirmed) with clear pricing ($0.02 USDC on Base), but there is no documented request/response schema, no examples, and the docs pages are empty beyond a wallet-connect prompt. The exact data returned is 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'/docs':179 '/pricing':181 '/readme':183 '/request':16,34 '0.02':15,33,123,168 '000':116 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':107 '20':115 '6':126 'SAND market data' 'SAND token price' 'The Sandbox token data' 'accept':87 'across':158 'addit':195 'ai/ml':161 'amount':110 'api':55,131 'appear':186 'base':13,31,102,117 'base-network' 'beyond':172 'broader':63 'call':4,22,113,150,226 'categori':159 'commit':139 'connect':191 'contract':106 'crypto token API' 'crypto-market-data' 'data':6,24,43,216 'data/analytics':160 'decim':127 'demand':42 'detail':197 'discov':221 'document':171,209 'endpoint':7,25,38,68,86,157,206 'equal':122 'estim':84 'exact':199 'exchang':78 'feed':77 'financ':66 'finance/web3':162 'gas':83 'gate':54 'handl':95 'includ':75 'individu':144 'infer':219 'infrastructur':163 'json':92 'key':132 'land':174 'limit':135 'list':155 'lowpaymentfee.com':57 'make':223 'mani':156 'maximum':109 'must':217 'network':14,32,103 'no-api-key' 'offer':69 'on-demand':40 'page':175,184 'paid':143,225 'part':60 'pay':2,20 'pay-per-cal':1,19 'pay-per-call' 'pay-per-request token info' 'payment':93 'per':3,21,112,169 'post':88 'price':76,165 'protocol':99 'provid':39,73,152,193 'quot':81 'rate':79,134 'request':89,141,170 'requir':111,188 'respons':200 'return':91,215 'sand':9,27,46,204 'sandbox':49 'schema':201 'site':154 'spars':177 'structur':212 'subscript':138 'suit':64 'technic':196 'time':147 'token':5,23,47,80,205 'token-data' 'uniform':166 'unit':118 'usdc':18,36,105,120,124 'usdc-settlement' 'use':104,125 'via':10,28,96 'wallet':190 'web3':67 'x402':11,29,53,98 'x402 crypto endpoint' 'x402-gated':52 'x402-payment'","prices":[{"id":"9d399122-577d-4e72-ac42-6eaeb6315da0","listingId":"ec698cd7-4ce3-4130-a070-627223d42115","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/SAND","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:12.876Z"}],"sources":[{"listingId":"ec698cd7-4ce3-4130-a070-627223d42115","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/SAND","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:12.876Z","lastSeenAt":"2026-04-23T21:32:34.510Z"}],"details":{"listingId":"ec698cd7-4ce3-4130-a070-627223d42115","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/SAND \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/SAND"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/SAND"}],"useCases":["Fetching current SAND token data (price, metadata) for portfolio dashboards","Integrating SAND token information into trading bots or DeFi applications","Agent-driven lookups of SAND token metrics without managing API keys"],"bestFor":["Developers needing keyless, pay-per-call access to SAND token data","AI agents that can settle x402 payments on Base","Projects wanting low-friction crypto data without subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed historical SAND data or OHLCV candles (not documented)","Anyone unable to pay with USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.451Z"},"updatedAt":"2026-04-23T21:32:34.510Z"}}