{"id":"fd27844e-b1ae-4419-8eca-69ecb61b8d88","shortId":"QdMYtL","kind":"x402","title":"x402-gated token data endpoint for PERP on Base, paid per-call in USDC.","tagline":"x402-gated token data endpoint for PERP on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to PERP token data via the x402 payment protocol. It is part of a broader suite of pay-per-request APIs covering data analytics, AI/ML inference, finance/Web3 market data, and utility services, all gated behind x402 micro-payments on the Base network.\n\nThe specific endpoint `/api/v1/tokens/PERP` accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required per call is 20,000 base units, which at 6 decimals equals $0.02 USD — consistent with the provider's advertised flat pricing of $0.02 per request across all endpoints. No API keys are needed; authentication and billing are handled entirely through the x402 payment header.\n\nDocumentation is extremely sparse. The provider's landing page lists available endpoints and pricing, but the /docs, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The exact fields returned for a PERP token query are unknown — it likely includes price, market data, or token metadata, but this is inference based on the endpoint path and the provider's \"Finance & Web3\" category description. Callers should be prepared to experiment with the POST body to discover accepted parameters.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","token-data","json-api","no-api-key","crypto-market-data"],"categories":["finance","crypto"],"synonyms":["PERP token price","perpetual protocol data","token quotes","crypto token API","x402 crypto API","pay-per-call token data","Base network API"],"warnings":["No API documentation available — /docs, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI or output schema provided; request body and response format are unknown","The exact data returned for /api/v1/tokens/PERP is inferred from the URL path and category, not documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/PERP","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/PERP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and no examples. The actual data returned is entirely unknown, making this effectively a stub 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'/docs':169 '/pricing':170 '/readme':172 '0.02':120,131 '000':112 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20':111 '6':117 'Base network API' 'PERP token price' 'accept':89,248 'access':40 'across':134 'advertis':127 'ai/ml':66 'amount':106 'analyt':65 'api':39,62,138 'authent':142 'avail':163 'base':10,26,83,103,113,223 'behind':76 'bill':144 'bodi':245 'broader':55 'call':14,30,109 'caller':236 'categori':234 'connect':178 'consist':122 'contract':100 'cover':63 'crypto token API' 'crypto-market-data' 'data':5,21,44,64,70,215 'decim':118 'descript':235 'detail':185 'discov':247 'document':153,194 'endpoint':6,22,34,87,136,164,226 'entir':147 'equal':119 'exact':200 'exampl':198 'experi':241 'extrem':155 'field':201 'financ':232 'finance/web3':68 'flat':128 'gate':3,19,75 'handl':146 'header':152 'includ':212 'infer':67,222 'json':94 'json-api' 'key':139 'land':160 'like':211 'list':162 'lowpaymentfee.com':36 'market':69,214 'maximum':105 'metadata':218 'micro':79 'micro-pay':78 'need':141 'network':84 'no-api-key' 'openapi':189 'page':161,173 'paid':11,27 'paramet':249 'part':52 'path':227 'pay':59 'pay-per-call token data' 'pay-per-request':58 'payment':48,80,95,151 'per':13,29,60,108,132 'per-cal':12,28 'per-request-billing' 'perp':8,24,42,205 'perpetual protocol data' 'post':90,244 'premium':38 'prepar':239 'price':129,166,213 'prompt':180 'protocol':49 'provid':37,125,158,230 'queri':207 'render':175 'request':61,91,133 'request/response':192 'requir':107 'return':93,202 'schema':193 'servic':73 'settl':97 'spars':156 'spec':190 'specif':86 'suit':56 'technic':184 'token':4,20,43,206,217 'token quotes' 'token-data' 'unit':114 'unknown':209 'usag':197 'usd':121 'usdc':16,32,99 'usdc-base' 'util':72 'via':45 'wallet':179 'web3':233 'x402':2,18,47,77,150 'x402 crypto API' 'x402-gated':1,17 'x402-payment'","prices":[{"id":"fc7aad33-d3bf-45a8-a86c-d4e8dc11c87e","listingId":"fd27844e-b1ae-4419-8eca-69ecb61b8d88","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/PERP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:09.880Z"}],"sources":[{"listingId":"fd27844e-b1ae-4419-8eca-69ecb61b8d88","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/PERP","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:09.880Z","lastSeenAt":"2026-04-23T23:03:05.316Z"}],"details":{"listingId":"fd27844e-b1ae-4419-8eca-69ecb61b8d88","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/PERP \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":{},"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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/tokens/PERP"},{"claim":"All endpoints 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"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/PERP"}],"useCases":["Fetching real-time or on-demand PERP token data without managing API keys","Integrating token market data into autonomous agents that can pay per call via x402","Building trading bots or dashboards that query token information with micro-payments"],"bestFor":["Agents or bots that need keyless, pay-as-you-go access to token data","Developers experimenting with x402 payment-gated APIs on Base","Low-volume or sporadic token data lookups where subscriptions are overkill"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need comprehensive API documentation or SDKs before integrating","Bulk historical token data downloads (no batch endpoint documented)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.638Z"},"updatedAt":"2026-04-23T23:03:05.316Z"}}