{"id":"ae227e1e-2e64-4762-a816-632830a80b1f","shortId":"p9AxDC","kind":"x402","title":"x402-gated token data endpoint returning info for OP token on Base network, $0.02/request in USDC.","tagline":"x402-gated token data endpoint returning info for OP token on Base network, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides token data via the x402 payment protocol. The specific path `/api/v1/tokens/OP` appears to serve information about the Optimism (OP) token, sitting within a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts exact-scheme payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a max amount of 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The payment timeout is 300 seconds. No API keys or rate limits are advertised — access is purely gated by micropayment. The endpoint accepts POST requests and returns `application/json`.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the `/api/v1/tokens/OP` endpoint actually returns. The platform lists many other endpoints (crypto quotes, gas estimates, sentiment analysis, etc.) but provides no technical documentation for any of them. The actual data source and quality behind these endpoints is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","token-data","pay-per-request","no-api-key","crypto-market-data"],"categories":["crypto","finance"],"synonyms":["token info API","OP token data","crypto token lookup","optimism token price","x402 crypto API","micropayment API","Base network API"],"warnings":["No API documentation available — all doc pages render only 'Connect wallet' with no content","No request or response schema provided; unknown what data the endpoint actually returns","No information about data sources, freshness, or accuracy","Platform lists many endpoints but none have technical documentation","Cannot verify the endpoint returns meaningful data without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/OP","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/OP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is zero documentation on request parameters, response schema, or what data is actually returned. No OpenAPI spec, no examples, and all doc pages are empty. The listing is essentially a stub with only the x402 challenge to go 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'/request':16,34 '0.02':15,33,95,134 '000':128 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':121 '20':127 '300':144 '6':138 'Base network API' 'OP token data' 'accept':114,162 'access':154 'actual':207,232 'address':120 'advertis':153 'ai/ml':80 'amount':125 'analysi':220 'analyt':79 'api':75,147,175 'appear':53 'application/json':167 'base':13,31,103,129 'behind':237 'broader':65 'call':74 'challeng':107 'confirm':108 'connect':183 'content':189 'crypto':215 'crypto token lookup' 'crypto-market-data' 'data':5,23,43,78,83,233 'decim':139 'descript':200 'doc':173 'document':168,226 'dozen':69 'endpoint':6,24,38,76,88,110,161,206,214,239 'estim':218 'etc':221 'exact':116 'exact-schem':115 'exampl':197 'extrem':170 'field':203 'finance/web3':82 'gas':217 'gate':3,21,157 'i.e':133 'infer':81 'info':8,26 'inform':56 'key':148 'limit':151 'list':211 'live':112 'lowpaymentfee.com':40 'mani':212 'max':124 'micropay':159 'micropayment API' 'network':14,32,104 'no-api-key' 'offer':68 'op':10,28,60 'openapi':193 'optim':59 'optimism token price' 'page':178 'path':51 'pay':72 'pay-per-cal':71 'pay-per-request' 'payment':47,118,141 'per':73,96 'platform':66,91,210 'post':163 'price':93,174 'prompt':185 'protocol':48 'provid':41,223 'pure':156 'qualiti':236 'quot':216 'rate':150 'readm':177 'render':180 'request':97,164 'request/response':196 'return':7,25,166,208 'schema':194 'scheme':117 'second':145 'sentiment':219 'serv':55 'servic':86 'settl':98 'sinc':135 'sit':62 'sourc':234 'span':77 'spars':171 'specif':50 'technic':225 'timeout':142 'token':4,11,22,29,42,61 'token info API' 'token-data' 'unit':130 'unknown':241 'usdc':18,36,100,132,136 'usdc-base' 'use':137 'util':85 'via':44 'wallet':184 'within':63 'x402':2,20,46,106 'x402 crypto API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"4ea7f7b8-2bb4-4720-8fd4-d98d036c07c5","listingId":"ae227e1e-2e64-4762-a816-632830a80b1f","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/OP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:06.316Z"}],"sources":[{"listingId":"ae227e1e-2e64-4762-a816-632830a80b1f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/OP","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:06.316Z","lastSeenAt":"2026-04-23T23:03:05.231Z"}],"details":{"listingId":"ae227e1e-2e64-4762-a816-632830a80b1f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/OP \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/OP"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/OP"},{"claim":"Platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving information about the OP (Optimism) token programmatically","Agent-driven crypto token lookups with per-call micropayments","Building dashboards that pull token data without managing API keys"],"bestFor":["Agents or bots that need on-demand token data without subscription commitments","Developers experimenting with x402 micropayment-gated APIs","Low-volume crypto data queries where $0.02/call is acceptable"],"notFor":["High-volume production use cases requiring documented SLAs and schemas","Users needing comprehensive historical token data or OHLCV candles (no evidence this is offered)","Anyone requiring detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.749Z"},"updatedAt":"2026-04-23T23:03:05.231Z"}}