{"id":"c4a9d38c-59ef-4156-ae6d-b7c96ddf7527","shortId":"Ucgc7M","kind":"x402","title":"Natural-language queries against Hubble Solana blockchain data, paid per call via x402 on Base.","tagline":"Natural-language queries against Hubble Solana blockchain data, paid per call via x402 on Base.","description":"This x402-enabled endpoint lets callers query Hubble blockchain data using natural language. It currently supports Solana data and is built on the x402-hono payment gateway framework. You send a plain-English question (e.g. \"Find the top 5 tokens by total trading volume in the past 7 days\") and receive structured results back as JSON.\n\nThe endpoint accepts a POST request with three parameters: a required `question` string (10–500 characters), an optional `source` field (either \"FILE\" or \"SINGLE\", defaulting to \"FILE\"), and an optional `threshold` confidence value between 0 and 1 (default 0.7). The response includes a success boolean, an array of query results, and an ISO 8601 timestamp.\n\nPayment is settled on Base network using USDC (contract 0x8335…2913). The maximum amount required per call is 50,000 base units, which equals $0.05 USD (USDC uses 6 decimals). The service also exposes a second endpoint at `/lego/api/v1/query/similar` for similarity-based queries, though no schema details are available for that route. There is no external documentation site; the service root returns a minimal JSON status page and all non-existent paths return a router listing.","tags":[],"capabilities":["natural-language-query","blockchain-data","solana-data","x402-payment","usdc-base","per-call-pricing","confidence-threshold","similarity-search"],"categories":["blockchain","search","data"],"synonyms":["hubble rpc","solana query","blockchain natural language","on-chain analytics","solana data api","hubble blockchain","crypto data query","nl2sql blockchain"],"warnings":["No external documentation site exists; all non-endpoint paths return 404-style JSON","The /lego/api/v1/query/similar endpoint is listed but has no schema or description","Response data array structure is unspecified — actual field names are unknown","The example response is inferred from the outputSchema, not from a real API call"],"endpointUrl":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x13b432397b05D3748A36FbE3bC03A6FbEB156CdD","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query","description":"Query Hubble blockchain data with natural language. Supports Solana","outputSchema":{"input":{"type":"http","method":"POST","bodyParams":{"source":{"enum":["FILE","SINGLE"],"type":"string","default":"FILE","description":"Data source to query"},"question":{"type":"string","example":"Find the top 5 tokens by total trading volume in the past 7 days","required":true,"maxLength":500,"minLength":10,"description":"Natural language query about blockchain data"},"threshold":{"type":"number","default":0.7,"maximum":1,"minimum":0,"description":"Confidence threshold for results"}},"discoverable":true},"output":{"type":"object","properties":{"data":{"type":"array","description":"Query results"},"success":{"type":"boolean","description":"Whether the query was successful"},"timestamp":{"type":"string","description":"ISO 8601 timestamp"}}}},"maxAmountRequired":"50000","maxTimeoutSeconds":300}]},"qualityScore":"0.620","qualityRationale":"The x402 challenge is live and includes a well-defined outputSchema with input/output specs and examples. However, there is no external documentation, no OpenAPI spec, no usage examples beyond the schema, and the /query/similar endpoint is undocumented. The response example is inferred from the schema rather than 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'x402-payment'","prices":[{"id":"17cf8b4c-687f-4163-a26a-91814b1bd4d9","listingId":"c4a9d38c-59ef-4156-ae6d-b7c96ddf7527","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"50000","chain":"base","payTo":"0x13b432397b05D3748A36FbE3bC03A6FbEB156CdD","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x13b432397b05D3748A36FbE3bC03A6FbEB156CdD","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query","description":"Query Hubble blockchain data with natural language. Supports Solana","outputSchema":{"input":{"type":"http","method":"POST","bodyParams":{"source":{"enum":["FILE","SINGLE"],"type":"string","default":"FILE","description":"Data source to query"},"question":{"type":"string","example":"Find the top 5 tokens by total trading volume in the past 7 days","required":true,"maxLength":500,"minLength":10,"description":"Natural language query about blockchain data"},"threshold":{"type":"number","default":0.7,"maximum":1,"minimum":0,"description":"Confidence threshold for results"}},"discoverable":true},"output":{"type":"object","properties":{"data":{"type":"array","description":"Query results"},"success":{"type":"boolean","description":"Whether the query was successful"},"timestamp":{"type":"string","description":"ISO 8601 timestamp"}}}},"maxAmountRequired":"50000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:33.126Z"}],"sources":[{"listingId":"c4a9d38c-59ef-4156-ae6d-b7c96ddf7527","source":"x402_bazaar","sourceId":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:33.126Z","lastSeenAt":"2026-04-22T04:02:47.714Z"}],"details":{"listingId":"c4a9d38c-59ef-4156-ae6d-b7c96ddf7527","quickStartSnippet":"curl -X POST https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"question\": \"Find the top 5 tokens by total trading volume in the past 7 days\", \"source\": \"FILE\", \"threshold\": 0.7}'","exampleRequest":{"source":"FILE","question":"Find the top 5 tokens by total trading volume in the past 7 days","threshold":0.7},"exampleResponse":{"data":[{"token":"SOL","volume":1234567890},{"token":"USDC","volume":987654321}],"success":true,"timestamp":"2025-01-15T12:00:00.000Z"},"schema":{"input":{"type":"http","method":"POST","bodyParams":{"source":{"enum":["FILE","SINGLE"],"type":"string","default":"FILE","description":"Data source to query"},"question":{"type":"string","example":"Find the top 5 tokens by total trading volume in the past 7 days","required":true,"maxLength":500,"minLength":10,"description":"Natural language query about blockchain data"},"threshold":{"type":"number","default":0.7,"maximum":1,"minimum":0,"description":"Confidence threshold for results"}},"discoverable":true},"output":{"type":"object","properties":{"data":{"type":"array","description":"Query results"},"success":{"type":"boolean","description":"Whether the query was successful"},"timestamp":{"type":"string","description":"ISO 8601 timestamp"}}}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query"},{"claim":"Maximum amount required is 50000 base units of USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.05","source_url":"https://x402.bedev.hubble-rpc.xyz/lego/api/v1/query"},{"claim":"Service identifies as X402 Payment Gateway (Simplified) v2.0.0 using x402-hono implementation","source_url":"https://x402.bedev.hubble-rpc.xyz"},{"claim":"Two endpoints are available: /lego/api/v1/query and /lego/api/v1/query/similar","source_url":"https://x402.bedev.hubble-rpc.xyz/docs"}],"useCases":["Querying Solana token trading volumes and rankings using plain English","Retrieving on-chain analytics without writing SQL or GraphQL","Agent-driven blockchain research with per-call micropayments","Finding similar blockchain data points via the /query/similar endpoint"],"bestFor":["AI agents that need on-demand Solana blockchain data","Developers who want natural-language access to on-chain metrics","Micropayment-based pay-per-query blockchain analytics"],"notFor":["Querying non-Solana blockchains (only Solana is documented as supported)","High-throughput bulk data extraction (per-call payment model, 300s timeout)","Users who need detailed documentation or SLA guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-03-03T19:35:28.79Z"},"updatedAt":"2026-04-22T04:02:47.714Z"}}