Koskamo

Uniswap Universal Router Decoder MCP

A Python-based MCP server that allows AI agents to decode and encode Uniswap Universal Router calldata for V2, V3, and V4 transactions. It provides read-only tools to analyze transaction structures and rebuild calldata from decoded inputs, facilitating DeFi interaction analysis without signing or sending transactions.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Uniswap Universal Router Decoder MCP logo, by ElnarilCommunity listingLocal stdioSource reviewed; not executedPublished by Elnaril
Vendor documentation

What you can do with it

  • Decode Uniswap Universal Router transaction calldata
  • Encode calldata from decoded transaction components
  • Analyze V2, V3, and V4 swap and liquidity operations
  • Rebuild transaction payloads for debugging or simulation

Source and maintenance

Community listingRegistry 4.0.0
mcp-registry: io.github.Elnaril/uniswap-universal-router-decoder@4.0.0Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

uniswap-universal-router-decoder 4.0.0

pypiuvx
uniswap-universal-router-decoder package definition
{
  "version": "4.0.0",
  "transport": "stdio",
  "identifier": "uniswap-universal-router-decoder",
  "runtimeHint": "uvx",
  "registryType": "pypi",
  "runtimeArguments": [
    {
      "name": "--from",
      "type": "named",
      "value": "uniswap-universal-router-decoder[mcp]"
    },
    {
      "type": "positional",
      "value": "ur-mcp",
      "valueHint": "command"
    }
  ],
  "environmentVariables": [
    {
      "name": "RPC_URL",
      "format": "string",
      "description": "Ethereum RPC endpoint. Optional: only decode_transaction needs it."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "uniswap-universal-router-decoder-mcp": {
      "command": "uvx",
      "args": [
        "uniswap-universal-router-decoder==4.0.0"
      ],
      "env": {
        "RPC_URL": "<YOUR_RPC_URL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "uniswap-universal-router-decoder-mcp": {
      "command": "uvx",
      "args": [
        "uniswap-universal-router-decoder==4.0.0"
      ],
      "env": {
        "RPC_URL": "<YOUR_RPC_URL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "uniswap-universal-router-decoder-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "uniswap-universal-router-decoder==4.0.0"
      ],
      "env": {
        "RPC_URL": "<YOUR_RPC_URL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "uniswap-universal-router-decoder-mcp": {
      "command": "uvx",
      "args": [
        "uniswap-universal-router-decoder==4.0.0"
      ],
      "env": {
        "RPC_URL": "<YOUR_RPC_URL>"
      }
    }
  }
}

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