{"uid":"cap_cXDPQrmZJ0FpCKnoJfP2h","slug":"blockrun-ai-multi-chain-json-rpc-base-58adfecb","name":"BlockRun.AI Multi-Chain JSON-RPC (Base)","description":"Multi-chain JSON-RPC passthrough fronted by BlockRun, powered by Tatum's gateway across 40 chains (Ethereum, Base, Solana, Polygon, BSC, Arbitrum, Optimism, Avalanche, Bitcoin, Sui, and more). One endpoint, every chain, pay-per-call in USDC, no API key. $0.002 per call (or per element of a JSON-RPC batch). Network: Base.","url":"https://blockrun.ai/api/v1/rpc/base?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"id":{"type":["string","number"],"description":"JSON-RPC id"},"method":{"type":"string","description":"Chain RPC method, e.g. eth_blockNumber, eth_call, eth_getBalance (EVM) or getSlot, getAccountInfo (Solana)."},"params":{"type":"array","description":"Method-specific params."},"jsonrpc":{"type":"string","description":"\"2.0\""}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7v5tob-UwYG_x27AeqaMp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Proxies JSON-RPC calls to the Base blockchain network via Tatum's gateway, accepting pay-per-call in USDC with no API key required.","exampleAgentPrompt":"Check the current ETH balance for address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — send eth_getBalance with the address and 'latest' as params.","exampleUseCases":[{"title":"Check on-chain token balance","prompt":"What's the ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base right now? Use eth_getBalance with latest block."},{"title":"Read current Base block height","prompt":"What's the latest block number on the Base network? Call eth_blockNumber for me."},{"title":"Fetch transaction receipt on Base","prompt":"Can you pull the transaction receipt for tx hash 0xabc123...def456 on Base using eth_getTransactionReceipt?"}],"resultDescription":"Returns a standard JSON-RPC 2.0 response object containing the 'result' field with chain-specific data (e.g. hex-encoded balance, block number, transaction receipt object, contract return value) or an 'error' object with code and message if the call fails.","failureModes":["Invalid JSON-RPC method name returns error code -32601","Malformed params array returns error code -32602","Insufficient USDC payment triggers HTTP 402","Rate limiting or gateway timeout from Tatum returns HTTP 503","Calling non-EVM methods (e.g. Solana getSlot) on the Base endpoint returns an error"],"whenToPreferThis":"Choose this endpoint when you need to query the Base blockchain specifically, want a no-API-key pay-per-call model billed in USDC, or are building an AI agent that needs ad-hoc on-chain reads without managing RPC subscriptions or API credentials. Ideal for lightweight, infrequent blockchain queries where provisioning a dedicated RPC node or API key is impractical.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T12:30:19.747Z","isFirstParty":false,"canonicalSlug":"blockrun-ai-multi-chain-json-rpc-base-58adfecb"}