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Base Chain JSON-RPC via x402 Micropayment
x402
Base Chain JSON-RPC 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).
Execute JSON-RPC calls against the Base (L2) blockchain, paying $0.002 USDC per call via the x402 protocol — 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 method result (e.g. hex block number, hex balance, or eth_call return data), chain identifier ('base'), chain_id (8453), upstream RPC URL used, and round-trip latency in milliseconds.
Example use cases
Live wallet balance check on Base
“What's the current ETH balance of 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 on Base? Use eth_getBalance with the 'latest' block tag.”
Current block number for timing trades
“What's the latest block number on Base right now? I need it to time my onchain transaction correctly.”
Smart contract read call on Base
“Call eth_call on Base for contract 0xabc123… with these params to read the current price from a DeFi contract — use the latest block.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/v1/rpc/base?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs trustless, key-free access to Base chain RPC calls and can pay per-use in USDC via x402. Ideal for autonomous trading or onchain agents that need real-time blockchain state (balances, block number, contract reads) without provisioning API keys or committing to a subscription. Prefer over alternatives when operating on Base L2 specifically and when the x402 micropayment model fits your agent's wallet infrastructure.
Side effects
- Payment not included or insufficient USDC via x402 → 402 Payment Required response
- Invalid JSON-RPC method name → JSON-RPC error with code -32601
- Malformed params array (not valid URL-encoded JSON) → parse error or JSON-RPC -32602
- Contract call reverts → JSON-RPC execution error -32000
- Upstream RPC (drpc.org) timeout or outage → 503 or timeout error
- Address not checksummed correctly → may return zero balance or error depending on method
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": 1,
"chain": "base",
"result": "0x32c8f1a",
"jsonrpc": "2.0",
"chain_id": 8453,
"upstream": "https://base.drpc.org",
"latency_ms": 84
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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