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Hergert Synthora Onchain Data API
x402
Hergert Synthora Onchain Data API is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Queries on-chain blockchain data across multiple EVM networks, supporting operations like ENS resolution, transaction lookup, balance checks, contract inspection, and nonce retrieval.
Price / call$0.01
Success—
StatusUnknown
How this service works
SYNTHORA Onchain Primitives: multichain (Base/Ethereum/Polygon/Arbitrum/Optimism) transaction receipts, tx lookup, wallet nonce, contract/proxy (EIP-1967) detection, ENS resolution, ERC20 + native balances, contract introspection. Deterministic, Ed25519-signed. 0.001 USDC via x402 on Base. First 3 calls FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment); after that 0.001 USDC per call.
Output
Returns a JSON object with ok:true, the operation name, and a result object containing the query-specific data (e.g. resolved address for ENS, transaction details for receipt/tx, balance as a number, bytecode string, nonce integer, proxy implementation address, or network metadata). Responses are signed with ed25519.
Example use cases
ENS name resolution for payments
“What Ethereum address does vitalik.eth point to right now? I need to verify the wallet before sending funds.”
Transaction confirmation check
“Can you pull the receipt for transaction 0xabc123… on Base and tell me whether it confirmed successfully?”
ERC20 balance audit
“Check the USDC balance for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet — I need the exact token balance.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/onchainWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call on-chain data queries across multiple EVM chains (Ethereum, Base, Polygon, Arbitrum, Optimism) without setting up your own RPC infrastructure. It is well-suited for agents that need to resolve ENS names, verify transactions, check balances, or inspect contracts on demand. The x402 micropayment model ($0.05 USDC per call) makes it cost-effective for occasional queries without a subscription.
Side effects
- Invalid or malformed address/hash returns an error result
- ENS name not found returns found:false
- Unsupported chain value returns validation error
- Missing required field for the chosen op (e.g. no hash for receipt) causes a 400-level error
- Network timeout or RPC node unavailability returns a service error
- Payment not received or insufficient USDC causes a 402 rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| op | string | Operation to perform |
| hash | string | Tx hash 0x… (receipt/tx) |
| name | string | ENS name e.g. vitalik.eth (ens) |
| chain | string | Chain (default ethereum) |
| token | string | ERC20 token address (erc20-balance) |
| address | string | Address 0x… (nonce/code/proxy/balance/contract) |
Tags
x402
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