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SYNTHORA eth_getCode Contract Checker
x402
SYNTHORA eth_getCode Contract Checker is a paid API for AI agents from rpc-code.hergertsynthora.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Checks whether an Ethereum address is a smart contract (vs EOA) using eth_getCode, with EIP-7702 delegation detection, returning a signed deterministic result
Price / call$0.1
Success—
StatusUnknown
How this service works
Check if an address is a contract via eth_getCode, with EIP-7702 delegation detection. Deterministic, Ed25519-signed.
Output
Returns whether the address has deployed bytecode (i.e. is a contract), whether it is an EIP-7702 delegated EOA, and a deterministic Ed25519-signed response confirming the result's authenticity. No result is returned and no charge is made on upstream RPC failure.
Example use cases
Verify contract status before fund transfer
“Before I send my tokens to 0x742d35Cc6634C0532925a3b844Bc9e7595f42bE, can you check if that address is actually a smart contract or just a regular wallet? I need to make sure I'm not sending to a contract that might not handle the transfer correctly.”
Detect EIP-7702 delegation in Base wallets
“I'm auditing our Base network activity and need you to check a few addresses — specifically 0x8ba1f109551bD432803012645Ac136ddd64DBA72 and others — to see which ones are using EIP-7702 delegation. I want a cryptographically signed result I can verify.”
Validate address type across multiple chains
“Can you check whether 0x1234567890abcdef1234567890abcdef12345678 is a contract or EOA on Ethereum, and also verify the same address's status on Base? I need deterministic signed results to audit our integration layer.”
Technical details
Endpoint
POSThttps://rpc-code.hergertsynthora.com/serviceWhen to prefer
Use this endpoint when you need a cryptographically signed, deterministic answer about whether an address is a contract or EOA on a supported EVM chain, especially when EIP-7702 delegation detection matters. Prefer this over generic RPC calls when you need auditability via Ed25519 signatures, or when integrating into an x402-payment-enabled pipeline on Base.
Side effects
- Invalid or malformed Ethereum address returns an error
- Unsupported or unknown chain identifier causes a failure
- Upstream RPC node failure returns no result and incurs no charge
- Missing or invalid X-WALLET header may block access after the 3 free calls
- Malformed POST body missing required fields returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | chain |
| addressrequired | string | address |
Tags
x402
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