ARYSPHERE eth_chainId Read

x402

ARYSPHERE eth_chainId Read is a paid API for AI agents from api.arysphere.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Returns the chain ID of the Ethereum mainnet via a pay-per-call x402 API endpoint requiring no account or API key.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

ARYSPHERE sells AI-written verdicts on Base token contracts (a grade, a one-liner, a roast and the contract's facts) and Base/Ethereum chain reads, paid per call in USDC on Base over x402 v2. No account and no API key.

Output

A JSON object containing 'ok' (boolean success flag), 'hex' (chain ID in hexadecimal, e.g. '0x1'), 'chain' (network name string, e.g. 'ethereum'), 'method' (the RPC method called, e.g. 'eth_chainId'), 'result' (numeric chain ID, e.g. 1), and 'service' (internal service identifier string).

Example use cases

Confirm Ethereum mainnet identity

“Can you check the Ethereum chain ID right now so I can confirm my app is pointed at mainnet and not a testnet?”

Build multi-chain routing logic

“I need to dynamically look up the Ethereum chain ID at runtime to route transactions correctly — can you fetch it for me?”

Validate network before a contract call

“Before I send a transaction, can you verify the chain ID of Ethereum mainnet so I know I'm on the right network?”

Technical details

Endpoint

GEThttps://api.arysphere.com/v1/ventures/x402_chain_reads_v1/eth_chainid?utm_source=zero.xyz

When to prefer

Prefer this endpoint when you need a quick, no-account, no-API-key Ethereum chain ID lookup paid per-call in USDC on Base. Ideal for agents or serverless workflows that need lightweight, trust-minimized chain reads without managing credentials or subscriptions.

Side effects

Payment not fulfilled — 402 response if USDC payment on Base is missing or insufficient
Network error reaching Ethereum RPC — may return ok:false or timeout
Malformed request — endpoint accepts no meaningful input parameters so failures are typically payment or infrastructure related

Input

Schema · Request body

Field	Type	Description
properties	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "hex": "0x1",
    "chain": "ethereum",
    "method": "eth_chainId",
    "result": 1,
    "service": "x402_chain_reads_v1.eth_chainid"
  }
}

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