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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 x402-agent-store.rileycraig14.workers.dev, 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, Optimism)
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-payable data APIs for AI agents — 35 endpoints across web search, on-chain reads, trading data, and AI-visibility. Pay per call in USDC via x402 on Base. No API keys, no signup.
Output
A JSON object containing the canonical chain name string and its numeric EVM chain ID (e.g. {"chain": "base", "chain_id": 8453}). Costs $0.001 USDC per call via x402 on Base, no API key required.
Example use cases
Example prompt
“What's the numeric chain ID for Optimism? I need it to configure my smart contract deployment.”
Technical details
Endpoint
GEThttps://x402-agent-store.rileycraig14.workers.dev/chain/chain-idWhen to prefer
Choose this endpoint when an agent needs to programmatically resolve a human-readable EVM chain name (base, ethereum, optimism, arbitrum, polygon, gnosis) to its numeric chain ID without maintaining a local lookup table. Ideal for agents building transactions, configuring multi-chain tools, or validating network parameters at runtime. Particularly useful when combined with other x402 on-chain endpoints on the same store for a unified pay-per-call, no-signup workflow.
Side effects
- Unsupported chain name returns an error or empty response
- Invalid chain query parameter (typo or unsupported network) may return null or 400
- Payment failure via x402 results in 402 Payment Required with no data returned
- Cloudflare Worker downtime results in 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"chain_id": 8453
}
}Tags
x402
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