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BlockRun.AI Polygon JSON-RPC Gateway
x402
BlockRun.AI Polygon JSON-RPC Gateway is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).
Proxies standard Ethereum/EVM JSON-RPC calls to the Polygon network via Tatum's gateway, billed 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: Polygon.
Output
A standard JSON-RPC 2.0 response object containing the result field with the requested on-chain data (block number, balance, call return value, etc.) or an error object with code and message if the call failed.
Example use cases
Check wallet balance on Polygon
“Look up the MATIC balance of wallet address 0xAbC123... on the Polygon mainnet using eth_getBalance at the latest block.”
Read smart contract state
“Call the balanceOf function on the Polygon ERC-20 contract at 0xDef456... for address 0xAbC123... using eth_call — I need to know how many tokens they hold.”
Fetch Polygon transaction receipt
“Get the transaction receipt for tx hash 0x789abc... on Polygon so I can confirm whether the transaction succeeded and what gas was used.”
Technical details
Endpoint
POSThttps://blockrun.ai/api/v1/rpc/polygon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need keyless, pay-per-call access to the Polygon EVM JSON-RPC without provisioning an API key or committing to a subscription. It is ideal for agents that need occasional or burst Polygon blockchain queries billed in USDC via x402 protocol, especially when a multi-chain gateway (Tatum) reliability is desired behind the scenes.
Side effects
- Invalid JSON-RPC method name returns error code -32601 Method not found
- Malformed params array returns error -32602 Invalid params
- Insufficient USDC balance causes payment failure and request rejection
- Network congestion may cause timeout or slow response
- Unsupported Polygon-specific methods may return errors from the underlying Tatum gateway
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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