{"id":"dbb73097-b094-4451-a016-2c957d97c854","shortId":"MLUVhp","kind":"x402","title":"Filecoin (FIL) token data via pay-per-call x402 endpoint on Base, $0.02/request in USDC.","tagline":"Filecoin (FIL) token data via pay-per-call x402 endpoint on Base, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides token data for Filecoin (FIL) as part of a broader suite of finance and crypto APIs. It uses the x402 payment protocol, accepting per-request payments of $0.02 in USDC on the Base network. No API keys, accounts, or rate limits are required — each call is individually settled on-chain.\n\nThe provider's site lists a wide catalog of endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint (`/api/v1/tokens/FIL`) falls under the crypto/finance category and likely returns price or market data for the FIL token, though the exact response schema is not documented. The x402 challenge confirms the endpoint is live, accepting POST requests, and settling via USDC (contract 0x8335…) on Base.\n\nDocumentation 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, and no description of what fields the FIL token endpoint returns. Users should expect to experiment with the endpoint to discover its output format.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-on-base","token-data","crypto-price-feed","no-api-key","no-rate-limit"],"categories":["finance","crypto"],"synonyms":["FIL token price","Filecoin market data","crypto token API","x402 crypto endpoint","pay-per-call token data","Filecoin price feed","lowpaymentfee API"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content","No OpenAPI or output schema provided; response format for /api/v1/tokens/FIL is unknown","The endpoint description is generic ('Premium API Access') and does not describe what token data is returned","Cannot verify what fields or data the FIL endpoint actually provides without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/FIL","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/FIL","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 via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and the docs pages are empty. The actual data returned is unknown, making this effectively a stub 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'/request':15,32 '0.02':14,31,68,117 '0x8335':164 'FIL token price' 'Filecoin market data' 'Filecoin price feed' 'accept':62,156 'account':78 'ai':105 'analyt':104 'api':55,76,175 'base':13,30,73,166 'broader':49 'call':9,26,85 'catalog':99 'categori':128 'chain':91 'challeng':150 'confirm':151 'connect':181 'contract':163 'crypto':54 'crypto token API' 'crypto-price-feed' 'crypto/finance':127 'data':4,21,41,103,135 'descript':199 'detail':188 'discov':217 'doc':172 'document':147,167 'endpoint':11,28,36,101,122,153,206,215 'exact':142 'exampl':195 'expect':210 'experi':212 'extrem':169 'fall':124 'field':202 'fil':2,19,44,138,204 'filecoin':1,18,43 'financ':52,108 'format':220 'individu':87 'infrastructur':111 'key':77 'learn':107 'like':130 'limit':81 'list':96 'live':155 'lowpaymentfee API' 'lowpaymentfee.com':38 'machin':106 'market':134 'network':74 'no-api-key' 'no-rate-limit' 'on-chain':89 'openapi':192 'output':219 'page':176 'part':46 'pay':7,24 'pay-per-cal':6,23 'pay-per-call token data' 'payment':60,66 'per':8,25,64,118 'per-request':63 'per-request-billing' 'post':157 'price':114,132,173 'prompt':183 'protocol':61 'provid':39,93 'rate':80 'render':178 'request':65,119,158 'request/response':196 'requir':83 'respons':143 'return':131,207 'schema':144 'settl':88,160 'site':95 'span':102 'spars':170 'spec':193 'specif':121 'suit':50 'technic':187 'though':140 'token':3,20,40,139,205 'token-data' 'uniform':115 'usdc':17,34,70,162 'usdc-on-base' 'use':57 'user':208 'util':112 'via':5,22,161 'wallet':182 'web3':109 'wide':98 'x402':10,27,59,149 'x402 crypto endpoint' 'x402-payment'","prices":[{"id":"dd4b9db1-5be3-4059-81b5-bdce24f40e00","listingId":"dbb73097-b094-4451-a016-2c957d97c854","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/FIL","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:56.917Z"}],"sources":[{"listingId":"dbb73097-b094-4451-a016-2c957d97c854","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/FIL","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:56.917Z","lastSeenAt":"2026-04-24T11:31:37.830Z"}],"details":{"listingId":"dbb73097-b094-4451-a016-2c957d97c854","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/FIL \\\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 HTTP 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/tokens/FIL"},{"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":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/tokens/FIL"},{"claim":"maxAmountRequired is 20000 base units (USDC 6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/tokens/FIL"}],"useCases":["Fetching current Filecoin (FIL) token data or price information on demand","Building trading bots or dashboards that need per-call crypto pricing without subscriptions","Agent-driven workflows that need permissionless, keyless access to token market data"],"bestFor":["Developers wanting zero-signup, pay-as-you-go crypto data","AI agents that can settle x402 payments autonomously on Base","Low-volume or sporadic token data lookups where subscriptions are overkill"],"notFor":["High-frequency trading requiring sub-second latency and bulk pricing","Users who need comprehensive historical token data or OHLCV candles (not documented)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.158Z"},"updatedAt":"2026-04-24T11:31:37.830Z"}}