MCP Ethers Wallet

Implementation Reference

• src/tools/core.ts:286-305 (handler)

  The execution handler for the 'formatEther' MCP tool. Takes a wei string input and uses ethers.formatEther to convert it to ether units, returning the formatted string.

  async ({ wei }) => {
    try {
      const etherValue = ethers.formatEther(wei);
      
      return {
        content: [{ 
          type: "text", 
          text: etherValue
        }]
      };
    } catch (error) {
      return {
        isError: true,
        content: [{ 
          type: "text", 
          text: `Error formatting ether: ${error instanceof Error ? error.message : String(error)}`
        }]
      };
    }
  }

• src/tools/core.ts:282-284 (schema)

  The input schema for the 'formatEther' tool, validating the 'wei' parameter as a string.

  wei: z.string().describe(
    "The wei value to format"
  )

• src/tools/core.ts:280-305 (registration)

  The registration of the 'formatEther' tool using server.tool() within the registerCoreTools function.

  "formatEther",
  {
    wei: z.string().describe(
      "The wei value to format"
    )
  },
  async ({ wei }) => {
    try {
      const etherValue = ethers.formatEther(wei);
      
      return {
        content: [{ 
          type: "text", 
          text: etherValue
        }]
      };
    } catch (error) {
      return {
        isError: true,
        content: [{ 
          type: "text", 
          text: `Error formatting ether: ${error instanceof Error ? error.message : String(error)}`
        }]
      };
    }
  }