DEX Swap Quotes API

br0ski777/dex-quotes-x402

This gives Claude direct access to DEX aggregation across Uniswap, SushiSwap, and Aerodrome on Base and Ethereum networks. It's built around the x402 USDC micropayment protocol, so each quote request costs a small amount but routes through a dedicated API endpoint rather than requiring your own RPC infrastructure. Reach for this when you're building trading tools or portfolio management agents that need real-time swap pricing without maintaining DEX integrations yourself. The SSE transport keeps quote streams live, and the micropayment model means you pay per call rather than dealing with API keys or rate limits.

tool: 1
transport: SSE
last updated: May 16, 2026

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Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

dex_get_swap_quoteUse this when you need a swap quote before trading tokens on-chain. Returns the best price across multiple DEXes in JSON. 1. bestDex: which DEX offers the best rate (Uniswap, SushiSwap, Aerodrome) 2.4 params

Use this when you need a swap quote before trading tokens on-chain. Returns the best price across multiple DEXes in JSON. 1. bestDex: which DEX offers the best rate (Uniswap, SushiSwap, Aerodrome) 2.

Parameters* required

amountstring

Amount of input token in raw units (wei/smallest unit, e.g. 1000000 for 1 USDC)

chainstring

Blockchain network: base or ethereum (default: base)one of base · ethereum

tokenInstring

Contract address of input token (e.g. 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 for USDC on Base)

tokenOutstring

Contract address of output token (e.g. 0x4200000000000000000000000000000000000006 for WETH on Base)

Readme

DEX Swap Quotes API

Best swap quotes across Uniswap, SushiSwap, Aerodrome -- price impact, route, slippage. Pre-trade essential. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "dex-quotes": {
      "url": "https://dex-quotes.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://dex-quotes.api.klymax402.com/api/quote?tokenIn=...&tokenOut=...&amount=..."
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository: github.com/br0ski777/dex-quotes-x402
Website: github.com/Br0ski777/dex-quotes-x402
Category: Finance & Commerce
Transport: SSE
Registry: MCP registry, active

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DEX Swap Quotes API

Tools

Readme

DEX Swap Quotes API

Quickstart -- MCP

Quickstart -- HTTP (x402)

Details

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