{"id":"6b22d975-083a-4264-9729-3e48abb227a6","shortId":"fkBceF","kind":"x402","title":"Pay-per-call token data API for SOL on Base via x402 — $0.02/request, no API keys.","tagline":"Pay-per-call token data API for SOL on Base via x402 — $0.02/request, no API keys.","description":"This endpoint at lowpaymentfee.com provides token data for SOL (Solana) via a simple POST request, paid per-call using the x402 protocol. Payment is settled in USDC on the Base network at $0.02 per request (maxAmountRequired of 20,000 base units with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe endpoint is part of a broader suite of APIs offered by lowpaymentfee.com spanning data & analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints on the platform share the same $0.02/request pricing model and x402 payment flow on Base.\n\nThe specific `/api/v1/tokens/SOL` endpoint likely returns token-level data for Solana (SOL), though the exact response schema is not documented. No OpenAPI spec, detailed docs, or example responses were found in the crawl — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","per-call-pricing","token-data","solana-sol","usdc-base-settlement","no-api-key","post-method"],"categories":["crypto","finance"],"synonyms":["SOL token data","Solana price API","crypto token API","x402 token endpoint","pay-per-call crypto API","lowpaymentfee","Base USDC API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","Docs, pricing, and API pages render only 'Connect wallet' with no usable content","Exact fields returned for SOL token data are undocumented and must be discovered empirically","The broader platform lists many endpoints but none appear to have public documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/SOL","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/SOL","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 x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs/pricing/API pages are all empty beyond a wallet connect prompt. The actual data returned by /api/v1/tokens/SOL is entirely 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'/request':15,33,153 '0.02':14,32,70,152 '000':76 '20':75 '402':221 '6':80 'Base USDC API' 'SOL token data' 'Solana price API' 'account':85 'addit':211 'ai/ml':121 'analyt':120 'api':7,17,25,35,83,114,200 'attach':93 'base':11,29,67,77,161 'broader':111 'call':4,22,55 'caller':91 'challeng':222 'classif':125 'confirm':216 'connect':206 'content':212 'convers':142 'crawl':195 'crypto token API' 'data':6,24,43,119,171 'decim':81 'detail':186 'doc':187,197 'document':182 'embed':126 'endpoint':38,106,145,165,214 'estim':136 'exact':177 'exampl':189 'exchang':131 'feed':130 'financ':127 'flow':159 'found':192 'gas':135 'generat':143 'geocod':140 'header':98 'infer':122 'infrastructur':138 'key':18,36,84 'level':170 'like':166 'limit':88 'live':217 'lowpaymentfee' 'lowpaymentfee.com':40,117 'maxamountrequir':73 'model':155 'network':68 'no-api-key' 'offer':115 'openapi':184 'page':201 'paid':52 'part':108 'pay':2,20 'pay-per-cal':1,19 'pay-per-call crypto API' 'payment':60,97,103,158 'per':3,21,54,71 'per-cal':53 'per-call-pricing' 'platform':148 'post':50 'post-method' 'price':129,154,198 'prompt':208 'proof':104 'protocol':59 'provid':41 'quot':134 'rate':87,132 'render':203 'request':51,72 'requir':90 'respons':178,190 'return':167 'schema':179 'sentiment':123 'settl':62 'share':149 'simpl':49 'simpli':92 'sol':9,27,45,174 'solana':46,173 'solana-sol' 'span':118 'spec':185 'specif':163 'suit':112 'summar':124 'though':175 'token':5,23,42,133,169 'token-data' 'token-level':168 'unit':78 'usdc':64 'usdc-base-settlement' 'use':56 'util':139 'valid':101,141,220 'via':12,30,47,218 'wallet':207 'web3':128 'x':96 'x-payment':95 'x402':13,31,58,102,157 'x402 token endpoint' 'x402-payment'","prices":[{"id":"3732e25b-cb46-4963-bb04-7e0c6fcde514","listingId":"6b22d975-083a-4264-9729-3e48abb227a6","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/SOL","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:13.464Z"}],"sources":[{"listingId":"6b22d975-083a-4264-9729-3e48abb227a6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/SOL","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:13.464Z","lastSeenAt":"2026-04-23T21:32:34.540Z"}],"details":{"listingId":"6b22d975-083a-4264-9729-3e48abb227a6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/SOL \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/tokens/SOL"},{"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/SOL"}],"useCases":["Fetching current SOL token data (price, metadata) without managing API keys","Agent-driven crypto portfolio monitoring with per-call micropayments","Integrating SOL market data into automated trading or analytics pipelines"],"bestFor":["AI agents needing on-demand SOL token data with no subscription","Developers who want zero-setup crypto data access via x402","Micropayment-friendly workflows where per-request billing is preferred"],"notFor":["High-volume bulk data ingestion where per-call costs add up quickly","Users who need detailed historical SOL data or OHLCV candles (not documented)","Anyone requiring comprehensive API documentation or SLA guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.448Z"},"updatedAt":"2026-04-23T21:32:34.540Z"}}