# SYNTHORA Gas and MEV Oracle

> SYNTHORA Gas and MEV Oracle is a paid API for AI agents from gasoracle.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Provides real-time Ethereum gas price estimates and MEV (Maximal Extractable Value) oracle data for blockchain transaction optimization

## Facts

- Endpoint: POST https://gasoracle.hergertsynthora.com/service
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-gas-and-mev-oracle-1462b605
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QI6rVodRdaWRAPWhYIJ_o

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synthora-gas-and-mev-oracle-1462b605 -d '<json body>'
```

Example prompt: Check the SYNTHORA Gas and MEV Oracle for current Ethereum gas prices and MEV risk so I can decide the right gas fee to set for my transaction right now.

## When to prefer this

Use this endpoint when you need real-time Ethereum gas price estimates combined with MEV oracle data in a single call, especially for DeFi applications, wallets, or trading bots that need to optimize transaction fees and assess front-running risk before submitting transactions.

## Known failure modes

- Malformed or empty input string returns validation error
- Network unavailability causes timeout or 503 error
- Payment not processed causes 402 Payment Required response
- Invalid query format returns 400 Bad Request
- Oracle data temporarily stale or unavailable returns partial or error response

## How this service works

Real-time gas price, base fee trend, MEV risk, and optimal tx fee recommendation on Base.

## Output

Returns current gas price data including base fee, priority fee recommendations, and MEV oracle signals indicating extraction risk or opportunity for Ethereum transactions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "description": "SYNTHORA Gas and MEV Oracle First 3 calls FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment); then 0.001 USDC per call."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "gas_oracle",
  "result": {},
  "receipt": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-gas-and-mev-oracle-1462b605/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gasoracle.hergertsynthora.com](https://www.zero.xyz/host/gasoracle.hergertsynthora.com/llms.txt)