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SYNTHORA Gas Oracle Multi-Chain
x402
SYNTHORA Gas Oracle Multi-Chain is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Returns dual-verified gas prices across Ethereum, Base, Arbitrum, Optimism, and Polygon with divergence reporting between two independent RPCs per chain
Price / call$0.03
Success—
StatusUnknown
How this service works
SYNTHORA gas-oracle-multi: gas price across 5 chains (ethereum, base, arbitrum, optimism, polygon), each VERIFIED by two independent public RPCs with divergence report — a single RPC can lie or lag; dual-verified is what you time transactions with. Free public RPCs, no key. $0.005 USDC x402 Base.
Output
Returns current gas prices for each of the five chains (Ethereum, Base, Arbitrum, Optimism, Polygon), each figure verified by two independent public RPC endpoints. Also includes a divergence report indicating how much the two RPC sources differ per chain, allowing the caller to assess data reliability and detect lagging or manipulated RPCs.
Example use cases
Optimal transaction timing for DeFi
“Before I submit this swap on Arbitrum, can you check the current dual-verified gas prices across Ethereum, Base, Arbitrum, Optimism, and Polygon so I can decide if now is a good time or if I should wait?”
Cross-chain bridge cost comparison
“I need to bridge funds and want to pick the cheapest chain right now — can you pull the verified gas prices across all five major chains (Ethereum, Base, Arbitrum, Optimism, Polygon) and tell me which has the lowest fees?”
Gas price divergence alert monitoring
“Check the gas prices on all five EVM chains using dual-RPC verification and tell me if any of the two RPC sources are diverging significantly — I want to know if any single RPC is lagging or giving bad data.”
Technical details
Endpoint
POSThttps://api.hergertsynthora.com/v1/gas-oracle-multiWhen to prefer
Choose this endpoint when you need trustworthy, cross-chain gas price data backed by dual-RPC verification rather than a single potentially-lagging source. Ideal for DeFi agents timing transactions across L1/L2 networks, bridge cost comparisons, or any workflow where a single RPC lying or lagging would cause financial harm. Preferable over single-RPC oracles or chain-specific gas APIs when operating across all five major EVM chains simultaneously.
Side effects
- Both RPCs for a chain are unavailable — chain data missing or partial result returned
- High divergence between the two RPCs indicating one may be lagging or unreliable — divergence flag raised in report
- Network timeout on public RPC endpoints causing slow or failed response
- x402 payment not accepted or insufficient USDC balance — 402 Payment Required error
- Invalid or malformed POST body — 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | SYNTHORA gas-oracle-multi: gas price across 5 chains (ethereum, base, arbitrum, optimism, polygon), each VERIFIED by two independent public RPCs with divergence report — a single RPC can lie or lag; d |
Tags
x402
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