Redis MCP Server

Instructions

Implementation Reference

• src/tools/hash.py:103-118 (handler)

  The hexists tool implementation: an async function decorated with @mcp.tool() that registers and handles the tool. It checks if a Redis hash field exists by calling r.hexists(name, key), returning True/False or error string.

  @mcp.tool()
  async def hexists(name: str, key: str) -> bool:
      """Check if a field exists in a Redis hash.
  
      Args:
          name: The Redis hash key.
          key: The field name inside the hash.
  
      Returns:
          True if the field exists, False otherwise.
      """
      try:
          r = RedisConnectionManager.get_connection()
          return r.hexists(name, key)
      except RedisError as e:
          return f"Error checking existence of field '{key}' in hash '{name}': {str(e)}"

• src/tools/hash.py:103-103 (registration)

  The @mcp.tool() decorator registers the hexists function as an MCP tool.

  @mcp.tool()