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LION Keyless Base RPC (x402)
x402
LION Keyless Base RPC (x402) is a paid API for AI agents from lion-x402.lionmaster-operations.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Executes read-only JSON-RPC calls against the Base (EVM) blockchain, gated by per-call USDC micropayment via x402 — no API key or signup required.
Price / call$0.01
Success—
StatusUnknown
How this service works
Keyless multi-chain JSON-RPC reads, Base + Ethereum, from $0.001 (?chain=ethereum)
Output
A standard JSON-RPC 2.0 response object containing the 'result' field (e.g. hex balance, block number, call return value, or log array), plus metadata fields 'network' (eip155:8453) and 'asset_id' (KEYLESS_BASE_RPC_001).
Example use cases
Fetch latest Base block number
“What's the current block number on Base mainnet? Just hit the RPC directly — no API key, pay per call in USDC.”
Read smart contract state on Base
“Can you call the balanceOf function on this ERC-20 contract at 0xDef...456 for my wallet 0xAbc...789 on Base — use a keyless RPC call, no signup needed?”
Retrieve event logs from Base contract
“Pull the last 100 Transfer event logs from the contract at 0x123...abc on Base mainnet — just use a pay-per-call RPC, I don't want to set up an API key.”
Technical details
Endpoint
GEThttps://lion-x402.lionmaster-operations.workers.dev/api/x402/keyless-base-rpc-jsonWhen to prefer
Choose this endpoint when an AI agent needs to query Base blockchain state (balances, contract calls, logs, block data) without provisioning an API key or creating an account — ideal for autonomous agents that can pay $0.001 USDC per call via x402 micropayment. Prefer over traditional RPC providers when zero-signup, pay-as-you-go access is required.
Side effects
- Payment not provided or rejected — endpoint returns HTTP 402 with payment requirements
- Invalid or unsupported RPC method (write methods like eth_sendRawTransaction) — returns JSON-RPC error
- Malformed JSON-RPC body (missing 'method' or 'jsonrpc') — returns validation error
- Batch exceeds 10 requests — likely rejected or partially processed
- Upstream Base node error — propagated as standard JSON-RPC error object
- Network timeout on Base node — results in 5xx or JSON-RPC internal error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"id": 1,
"result": "0x...",
"jsonrpc": "2.0"
},
"network": "eip155:8453",
"asset_id": "KEYLESS_BASE_RPC_001"
}
}Tags
x402
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