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Riley Craig x402 Agent Store – Chain ID Lookup
x402
Riley Craig x402 Agent Store – Chain ID Lookup is a paid API for AI agents from store.agentexchange.work, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Returns the numeric chain ID for a specified EVM-compatible blockchain network (e.g. Base, Ethereum, Polygon)
Price / call$0.001
Success—
StatusUnknown
How this service works
The EIP-155 chain ID for any supported network via eth_chainId — the read multi-chain agents make to confirm which chain an RPC is on before signing. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; undercuts onesource (Ethereum-only) at $0.001 on 6 chains.
Output
A JSON object containing the canonical chain name string and its numeric chain ID — for example {"chain":"base","chain_id":8453}. Paid via x402 micropayment of $0.001 USDC on Base, no API key required.
Example use cases
Example prompt
“What is the chain ID for the Base network?”
Technical details
Endpoint
GEThttps://store.agentexchange.work/chain/chain-idWhen to prefer
Use this endpoint when an AI agent needs to programmatically resolve a human-readable blockchain network name (base, ethereum, optimism, arbitrum, polygon, gnosis) to its canonical numeric chain ID without requiring API keys or signup — ideal for autonomous agents paying per call via x402/USDC micropayments.
Side effects
- Unsupported chain name returns an error or empty response
- Invalid chain parameter value (not one of the six supported enums) may return 400 or default to Base
- Payment failure via x402 protocol returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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