{"id":"202a6e70-69d5-4072-b87f-e44565bf2435","shortId":"SB9DsY","kind":"x402","title":"DeFi liquidity data for GRT via x402 micropayment on Base, $0.02 per request.","tagline":"DeFi liquidity data for GRT via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides DeFi liquidity information for the GRT (The Graph) token, accessible through the x402 payment protocol. It is part of a broader API platform at lowpaymentfee.com that offers data & analytics, AI/ML inference, finance/Web3, and infrastructure endpoints — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint at `/api/v1/defi/GRT/liquidity` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge confirms the endpoint is live, advertising a maxAmountRequired of 20,000 base units (USDC has 6 decimals, so this equals $0.02). The payment is made via the \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, 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 liquidity response contains. The endpoint is confirmed live via the 402 challenge, but the actual data format and coverage details must be discovered by calling the endpoint.","tags":[],"capabilities":["defi-liquidity-data","grt-token","x402-micropayment","base-network","usdc-settlement","per-request-pricing","no-api-key"],"categories":["defi","finance"],"synonyms":["GRT liquidity","The Graph liquidity","DeFi liquidity API","token liquidity data","GRT DeFi","crypto liquidity endpoint","x402 DeFi API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or JSON schema describing request parameters or response format.","The /api/v1/defi/GRT/liquidity endpoint is not listed among the advertised APIs on the homepage, raising questions about its official support status.","No SLA, rate limit, or uptime guarantees documented."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/GRT/liquidity","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/defi/GRT/liquidity","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 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The specific /defi/GRT/liquidity path is not even listed on the homepage, making it unclear whether it is a supported production endpoint or an undocumented 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'0.02':11,24,68,127 '000':117 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':103 '20':116 '300':141 '402':191 '6':122 'DeFi liquidity API' 'GRT DeFi' 'GRT liquidity' 'The Graph liquidity' 'accept':87 'access':39 'actual':195 'address':137 'advertis':112 'ai/ml':59 'analyt':58 'api':51,73,150 'base':10,23,98,118 'base-network' 'broader':50 'call':205 'challeng':106,192 'commit':80 'confirm':107,187 'connect':159 'contain':183 'content':165 'contract':102 'coverag':199 'crypto liquidity endpoint' 'data':3,16,57,196 'decim':123 'defi':1,14,30 'defi-liquidity-data' 'descript':176 'detail':200 'discov':203 'doc':149 'document':144 'endpoint':28,64,84,109,185,207 'equal':126 'exact':134 'exampl':173 'extrem':146 'field':179 'finance/web3':61 'format':197 'graph':37 'grt':5,18,35 'grt-token' 'infer':60 'inform':32 'infrastructur':63 'json':92 'key':74 'limit':77 'liquid':2,15,31,181 'live':111,188 'lowpaymentfee.com':54 'made':131 'maxamountrequir':114 'micropay':8,21 'must':201 'network':99 'no-api-key' 'offer':56 'openapi':169 'page':154 'part':47 'payment':43,93,129 'per':12,25,69 'per-request-pricing' 'platform':52 'post':88 'price':66,151 'prompt':161 'protocol':44 'provid':29 'rate':76 'readm':153 'render':156 'request':13,26,70,89 'request/response':172 'requir':81 'respons':182 'return':91 'schema':170 'scheme':135 'second':142 'settl':95 'spars':147 'specif':83 'timeout':143 'token':38 'token liquidity data' 'unit':119 'usdc':101,120 'usdc-settlement' 'use':100 'via':6,19,132,189 'wallet':160 'x402':7,20,42,105 'x402 DeFi API' 'x402-micropayment'","prices":[{"id":"c7477064-22e1-405d-9761-03c58f71379e","listingId":"202a6e70-69d5-4072-b87f-e44565bf2435","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/defi/GRT/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:44.311Z"}],"sources":[{"listingId":"202a6e70-69d5-4072-b87f-e44565bf2435","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/GRT/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:44.311Z","lastSeenAt":"2026-04-22T23:00:50.600Z"}],"details":{"listingId":"202a6e70-69d5-4072-b87f-e44565bf2435","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/GRT/liquidity \\\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":"Endpoint returns 402 with x402 challenge advertising 20000 base units USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/GRT/liquidity"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/GRT/liquidity"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Homepage lists Finance & Web3, Data & Analytics, AI & ML, and Infrastructure API categories but does not list a /defi/ endpoint","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying real-time liquidity data for GRT across DeFi protocols","Building trading bots that need GRT liquidity depth before executing swaps","Monitoring GRT liquidity pool health for portfolio management","Integrating GRT liquidity metrics into DeFi dashboards"],"bestFor":["Agents or apps needing on-demand GRT liquidity data without API key management","Developers building on Base who want frictionless pay-per-call DeFi data","Low-volume consumers who prefer micropayments over monthly subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing comprehensive multi-token liquidity data in a single call","Anyone requiring detailed API documentation or schema validation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:20:06.341Z"},"updatedAt":"2026-04-22T23:00:50.600Z"}}