# SYNTHORA Slippage Oracle

> SYNTHORA Slippage Oracle is a paid API for AI agents from slippage.hergertsynthora.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Estimates expected slippage for a token swap on a given chain and fee tier, given input token, output token, and amount

## Facts

- Endpoint: POST https://slippage.hergertsynthora.com/service
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-slippage-oracle-4f7d24d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vivlaLm4FxN0jhUkedUao

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-slippage-oracle-4f7d24d7 -d '<json body>'
```

Example prompt: What's the expected slippage if I swap 5000 USDC for WETH on Ethereum mainnet using a 3000 (0.3%) fee tier pool?

## When to prefer this

Use this endpoint when you need a pre-trade slippage estimate for a specific token pair on a specific chain and fee tier before executing a swap. Prefer this over on-chain simulation when you need a lightweight, fast oracle-based estimate without constructing a full transaction.

## Known failure modes

- Unsupported chain returns an error or empty response
- Invalid or non-existent token address causes computation failure
- Fee tier not available for the given token pair
- Amount too small or too large for meaningful slippage estimation
- Network or oracle timeout results in no response

## How this service works

Pre-trade slippage estimate via Uniswap v3 QuoterV2. Returns expected output and impact %.

## Output

Returns an estimated slippage value or price impact percentage for the described token swap, helping the agent or user decide whether to proceed with a trade or adjust parameters.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "description": "JSON: token_in, token_out, amount_in"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ok": {
   "type": "boolean"
  },
  "niche": {
   "type": "string"
  },
  "result": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-slippage-oracle-4f7d24d7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from slippage.hergertsynthora.com](https://www.zero.xyz/host/slippage.hergertsynthora.com/llms.txt)