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BlockRun.AI Multi-Chain JSON-RPC (Base)
x402
BlockRun.AI Multi-Chain JSON-RPC (Base) is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).
Proxies JSON-RPC calls to the Base blockchain network via Tatum's gateway, accepting pay-per-call in USDC with no API key required.
Price / call$0.003
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Check on-chain token balance
“What's the ETH balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base right now? Use eth_getBalance with latest block.”
Read current Base block height
“What's the latest block number on the Base network? Call eth_blockNumber for me.”
Fetch transaction receipt on Base
“Can you pull the transaction receipt for tx hash 0xabc123...def456 on Base using eth_getTransactionReceipt?”
Technical details
Endpoint
POSThttps://blockrun.ai/api/v1/rpc/base?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| id | — | JSON-RPC id |
| method | string | Chain RPC method, e.g. eth_blockNumber, eth_call, eth_getBalance (EVM) or getSlot, getAccountInfo (Solana). |
| params | array | Method-specific params. |
| jsonrpc | string | "2.0" |
Tags
x402
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