# Saylor Innovations Data Desk – Uniswap V3 Swap Quote

> Saylor Innovations Data Desk – Uniswap V3 Swap Quote is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Returns a Uniswap V3 swap quote for any token pair on Ethereum, Base, Arbitrum, Optimism, or Polygon, including best fee tier, optional WETH hop routing, output amount, price impact, and gas estimate.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/dex/quote?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-data-desk-uniswap-v3-swap-quote-86068fc3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GUExVzGO-U4mOFRowi78K

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 saylor-innovations-data-desk-uniswap-v3-swap-quote-86068fc3
```

Example prompt: What's the best Uniswap V3 quote to swap 1000 USDC (0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48) for WETH (0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) on Ethereum right now — what's the output amount, best fee tier, and price impact?

## When to prefer this

Choose this endpoint when you need a fast, read-only Uniswap V3 swap quote across Ethereum mainnet or major L2s (Base, Arbitrum, Optimism, Polygon) without needing to connect a wallet or execute a transaction. It is ideal for pre-trade price checks, arbitrage scouting, gas estimation, and building DeFi dashboards. Prefer it over on-chain RPC calls when you want automatic best-fee-tier selection and WETH routing handled for you.

## Known failure modes

- Unsupported chain name returns an error or empty result
- Invalid or non-checksummed token address causes a failed lookup
- No liquidity in any fee tier for the pair returns no valid quote
- Extremely large amount_in may produce unreliable price impact figures
- Network congestion or RPC node issues may cause stale or failed quotes
- amount_in formatted incorrectly (e.g. in wei instead of decimal) produces wrong output

## How this service works

Uniswap V3 swap quote for any token pair on Ethereum, Base, Arbitrum, Optimism or Polygon: best fee tier or WETH hop, output amount, price impact and gas.

## Output

A JSON object containing the best swap route on Uniswap V3 (output token amount, optimal fee tier, whether a WETH hop is used, price impact, and gas estimate), plus an array of alternative routes, the block at which the quote was taken, the data source, and a note with caveats for interpreting the result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "token_in",
      "token_out",
      "amount_in"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "description": "ethereum, base, arbitrum, optimism or polygon"
      },
      "token_in": {
       "type": "string",
       "description": "address of the token you sell"
      },
      "amount_in": {
       "type": "string",
       "description": "amount of token_in as a decimal number (for example 1000 for 1000 USDC)"
      },
      "token_out": {
       "type": "string",
       "description": "address of the token you buy"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "chain",
      "dex",
      "token_in",
      "token_out",
      "amount_in",
      "best",
      "alternatives",
      "note",
      "source"
     ],
     "properties": {
      "dex": {
       "type": "string"
      },
      "best": {
       "type": "object"
      },
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "chain": {
       "type": "string",
       "description": "Blockchain the data is for"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "token_in": {
       "type": "object",
       "description": "Token, in inches"
      },
      "amount_in": {
       "type": "string",
       "description": "Amount, in inches"
      },
      "token_out": {
       "type": "object",
       "description": "Token out"
      },
      "alternatives": {
       "type": "array"
      },
      "quoted_at_block": {
       "type": [
        "number",
        "null"
       ],
       "description": "Quoted at block"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-data-desk-uniswap-v3-swap-quote-86068fc3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)