{"id":"d94c543d-c1b9-4c36-9d6c-5eaa8d87cc2c","shortId":"GjhmFe","kind":"x402","title":"OHLCV candlestick data for GRT (The Graph) via pay-per-request x402 on Base.","tagline":"OHLCV candlestick data for GRT (The Graph) via pay-per-request x402 on Base.","description":"This endpoint provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the GRT (The Graph) cryptocurrency token. It is part of the lowpaymentfee.com platform, which offers a suite of data, AI, finance, and utility APIs all priced at $0.02 per request and settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint is accessed via HTTP POST and requires an X-PAYMENT header conforming to the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimal places. There are no API keys, no rate limits, and no subscription commitments — each request is individually paid for on-chain.\n\nDocumentation on the site is extremely sparse: the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. As a result, the exact request body schema (e.g., supported time intervals, date ranges, or pagination parameters) and the response format are unknown. The endpoint is confirmed live via a valid 402 challenge, but callers will need to experiment or contact the provider to determine the full request/response contract.","tags":[],"capabilities":["ohlcv-data","crypto-market-data","x402-payment","per-request-billing","base-network","usdc-settlement"],"categories":["finance","crypto"],"synonyms":["GRT OHLCV","The Graph candlestick data","crypto candlestick API","GRT price history","token OHLCV endpoint","crypto market data API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","Request body schema is unknown; callers must guess or reverse-engineer required parameters","Response format and fields are undocumented","No OpenAPI spec or AI plugin manifest provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/GRT/ohlcv","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/crypto/GRT/ohlcv","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 with clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages render only 'Connect wallet'. No request body schema, response schema, or usage examples are available, making this effectively a stub 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'000':115 '0x8335':120 '20':114 '2913':121 '402':210 '6':130 'GRT OHLCV' 'GRT price history' 'The Graph candlestick data' 'access':88 'ai':62 'amount':109 'api':66,136,163 'base':15,30,81,116,123 'base-network' 'bodi':185 'call':112 'caller':213 'candlestick':2,17,40 'chain':153 'challeng':211 'close':38 'commit':144 'confirm':205 'conform':99 'connect':172 'contact':219 'content':178 'contract':227 'crypto candlestick API' 'crypto market data API' 'crypto-market-data' 'cryptocurr':47 'data':3,18,41,61 'date':191 'decim':131 'determin':223 'doc':162 'document':154 'e.g':187 'endpoint':32,86,203 'equal':125 'exact':104,183 'exact-pay':103 'experi':217 'extrem':159 'financ':63 'format':199 'full':225 'given':127 'graph':7,22,46 'grt':5,20,44 'header':98 'high':36 'http':90 'individu':148 'interv':190 'key':137 'limit':140 'live':206 'low':37 'lowpaymentfee.com':54 'maximum':108 'need':215 'network':82 'offer':57 'ohlcv':1,16,34 'ohlcv-data' 'on-chain':151 'open':35 'page':167 'pagin':194 'paid':149 'paramet':195 'part':51 'pay':10,25 'pay-per-request':9,24 'payment':97,105 'per':11,26,71,111 'per-request-billing' 'place':132 'platform':55 'post':91 'price':68,164 'prompt':174 'protocol':78 'provid':33,221 'rang':192 'rate':139 'readm':166 'render':169 'request':12,27,72,146,184 'request/response':226 'requir':93,110 'respons':198 'result':181 'schema':186 'scheme':106 'settl':74 'site':157 'spars':160 'subscript':143 'suit':59 'support':188 'time':189 'token':48 'token OHLCV endpoint' 'unit':117 'unknown':201 'usdc':84,119,128 'usdc-settlement' 'use':83 'util':65 'valid':209 'via':8,23,75,89,207 'volum':39 'wallet':173 'x':96 'x-payment':95 'x402':13,28,77,102 'x402-payment'","prices":[{"id":"727195e0-2896-428e-aeb4-b034734fede1","listingId":"d94c543d-c1b9-4c36-9d6c-5eaa8d87cc2c","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/crypto/GRT/ohlcv","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:48.994Z"}],"sources":[{"listingId":"d94c543d-c1b9-4c36-9d6c-5eaa8d87cc2c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/GRT/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:48.994Z","lastSeenAt":"2026-04-24T06:31:47.441Z"}],"details":{"listingId":"d94c543d-c1b9-4c36-9d6c-5eaa8d87cc2c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/GRT/ohlcv \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/crypto/GRT/ohlcv"},{"claim":"All APIs on the platform 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/crypto/GRT/ohlcv"}],"useCases":["Fetching historical OHLCV candlestick data for GRT to build trading charts","Backtesting trading strategies using GRT price and volume history","Integrating GRT market data into dashboards or portfolio trackers","Agent-driven crypto analysis workflows that need per-call payment without API keys"],"bestFor":["AI agents or bots that need on-demand GRT market data without managing API keys","Developers prototyping crypto dashboards who want instant pay-per-use access","Low-volume or sporadic consumers of GRT OHLCV data who don't want subscriptions"],"notFor":["High-frequency trading requiring sub-second latency and free bulk access","Users who need OHLCV data for tokens other than GRT (separate endpoints exist)","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:40.623Z"},"updatedAt":"2026-04-24T06:31:47.441Z"}}