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x402 Multi-Chain EVM JSON-RPC Proxy
x402
x402 Multi-Chain EVM JSON-RPC Proxy is a paid API for AI agents from agentx402pay.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Provides safelisted read-only JSON-RPC access to major EVM blockchains (Base, Ethereum, Polygon, Arbitrum, Optimism) via standard methods like eth_call, eth_getBalance, and eth_getBlockByNumber
Price / call$0.01
Success—
StatusUnknown
How this service works
Safelisted read-only JSON-RPC proxy across major EVM chains (base, ethereum, polygon, arbitrum, optimism) — eth_call, eth_getBalance, eth_getTransactionReceipt, eth_getBlockByNumber, and more
Output
Returns a standard JSON-RPC response object containing the result field with on-chain data such as a balance in hex wei, a transaction receipt object, block details, or a smart contract call return value. Errors are surfaced as JSON-RPC error objects with a code and message.
Example use cases
Check wallet balance on Base
“Look up the ETH balance of 0xAbCd1234...5678 on Base — what do they have in their wallet right now?”
Fetch transaction receipt on Polygon
“Can you pull the transaction receipt for hash 0xabc123...def456 on Polygon and tell me if it succeeded?”
Read smart contract value on Arbitrum
“Call eth_call on the contract at 0xContractAddress on Arbitrum using params ["0xContractAddress", {"data": "0x18160ddd"}] and give me the result.”
Technical details
Endpoint
GEThttps://agentx402pay.com/api/rpc?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call read-only EVM RPC access across multiple chains without managing your own node or API keys. Ideal for agents that need occasional on-chain lookups (balances, receipts, block data, contract reads) across Base, Ethereum, Polygon, Arbitrum, or Optimism without committing to a full RPC provider subscription. Prefer this over dedicated RPC providers when building agentic workflows that already use x402 micropayment infrastructure.
Side effects
- Unsupported or write RPC method requested — only safelisted read-only methods are allowed
- Invalid or malformed params JSON array causing parse error
- Unsupported chain name returns an error or defaults to Base
- Network timeout or upstream RPC node unavailability
- Payment not received or invalid x402 payment header causes 402 rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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