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Base Blockchain Block Number via JSON-RPC (x402)
x402
Base Blockchain Block Number via JSON-RPC (x402) 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 2026-10-31).
Returns the current Base blockchain block number (or executes other JSON-RPC calls) via a pay-per-call x402 micropayment API requiring no API keys.
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. block number as hex string for eth_blockNumber), chain identifier ('base'), chain_id (8453), upstream RPC URL used, and latency_ms for the upstream call.
Example use cases
Onchain agent block confirmation check
“What's the latest block number on Base? I need to confirm my transaction is finalized — fetch the current block height using eth_blockNumber.”
Wallet balance lookup for trading bot
“Check the ETH balance of the wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 on Base mainnet using eth_getBalance with the 'latest' parameter.”
Smart contract state read for DeFi agent
“Run an eth_call on Base to read the current state of a smart contract — no API key needed, just pay the micropayment. The contract is at 0xabc...123 and I need the result field from the JSON-RPC response.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/block-number?utm_source=zero.xyzWhen to prefer
Choose this endpoint when building onchain or trading AI agents that need lightweight Base blockchain JSON-RPC access without registering for a conventional API key. Ideal for autonomous agents that can pay micropayments in USDC via the x402 protocol, need real-time block numbers or balances, and want zero-friction permissionless access. Prefer over full RPC providers when pay-per-call economics fit your agent's usage pattern.
Side effects
- Payment not made or insufficient USDC — returns HTTP 402 Payment Required
- Invalid JSON-RPC method name — returns RPC error in result
- Malformed params array (not valid URL-encoded JSON) — returns parse error
- Upstream dRPC node unavailable — may return 502 or timeout
- Rate limiting if too many unpaid requests attempted
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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