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Ethereum JSON-RPC Proxy via x402 Micropayment
x402
Ethereum JSON-RPC Proxy via x402 Micropayment is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-02).
Executes Ethereum JSON-RPC calls (e.g. eth_blockNumber, eth_getBalance, eth_call) via a pay-per-call proxy authenticated with x402 USDC micropayments on Base — no API key required.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON-RPC 2.0 response object containing the result field (e.g. hex block number, hex balance, or call output), plus metadata: chain name, chain_id (1 for Ethereum mainnet), the upstream RPC URL used, and latency in milliseconds.
Example use cases
Check wallet balance for trading bot
“What's the current ETH balance of 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet? I need this for my trading agent — use eth_getBalance at the latest block.”
Get latest Ethereum block number
“What's the latest Ethereum block number right now? Call eth_blockNumber with no params and pay the micropayment automatically.”
Read smart contract on-chain state
“Can you call eth_call on Ethereum to read the totalSupply of the USDC contract at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — use the latest block and auto-pay the fee.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/v1/rpc/eth?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs to query Ethereum mainnet on-chain data (balances, block numbers, contract calls) without managing API keys, and can pay $0.002 USDC per call via x402 on Base. Ideal for lightweight trading or DeFi agents that need occasional RPC lookups without subscribing to a full RPC provider.
Side effects
- Invalid JSON-RPC method name returns an error result field
- Malformed params array causes a parse error or invalid params response
- x402 payment failure or insufficient USDC balance blocks the call with a 402 response
- Upstream RPC node unavailable causes a gateway timeout or upstream error
- Unsupported methods not proxied by this endpoint return method not found
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": 1,
"chain": "ethereum",
"result": "0x16a3f2b",
"jsonrpc": "2.0",
"chain_id": 1,
"upstream": "https://ethereum-rpc.publicnode.com",
"latency_ms": 92
}
}Tags
x402
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