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Uniswap Universal Router Decoder

Official registry Other

Decode and encode Uniswap Universal Router calldata (V2, V3, V4). Read-only: never signs or sends.

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package uniswap-universal-router-decoder
Claude Code 
claude mcp add uniswap-universal-router-decoder -e 'RPC_URL=<RPC_URL>' -- uvx uniswap-universal-router-decoder==4.0.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "uniswap-universal-router-decoder": {
            "command": "uvx",
            "args": [
                "uniswap-universal-router-decoder==4.0.0"
            ],
            "env": {
                "RPC_URL": "<RPC_URL>"
            }
        }
    }
}

Environment variables

  • RPC_URL Ethereum RPC endpoint. Optional: only decode_transaction needs it.

Frequently asked questions

What is Uniswap Universal Router Decoder?

Decode and encode Uniswap Universal Router calldata (V2, V3, V4). Read-only: never signs or sends.

How do I install Uniswap Universal Router Decoder?

It runs on your machine. In Claude Code: claude mcp add uniswap-universal-router-decoder -e 'RPC_URL=<RPC_URL>' -- uvx uniswap-universal-router-decoder==4.0.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Uniswap Universal Router Decoder need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Uniswap Universal Router Decoder open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains Uniswap Universal Router Decoder?

It is published by Elnaril. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.