MCP Helius

Instructions

Implementation Reference

• src/handlers/helius.ts:179-191 (handler)

  The main handler function that validates the input public key, fetches account information from the Helius RPC connection, and returns a formatted success or error response.

  export const getAccountInfoHandler = async (input: GetAccountInfoInput): Promise<ToolResultSchema> => {
    const publicKeyResult = validatePublicKey(input.publicKey);
    if (!(publicKeyResult instanceof PublicKey)) {
      return publicKeyResult;
    }
    
    try {
      const accountInfo = await (helius as any as Helius).connection.getAccountInfo(publicKeyResult, input.commitment);
      return createSuccessResponse(`Account info: ${JSON.stringify(accountInfo, null, 2)}`);
    } catch (error) {
      return createErrorResponse(`Error getting account info: ${error instanceof Error ? error.message : String(error)}`);
    }
  }

• src/tools.ts:138-149 (schema)

  The tool definition including name, description, and input schema for validating parameters: publicKey (required) and optional commitment.

  {
    name: "helius_get_account_info",
    description: "Get account information for a Solana address",
    inputSchema: {
      type: "object",
      properties: {
        publicKey: { type: "string" },
        commitment: { type: "string", enum: ["confirmed", "finalized", "processed"] }
      },
      required: ["publicKey"]
    }
  },

• src/tools.ts:560-560 (registration)

  Registration of the tool name to its handler function in the handlers dictionary.

  "helius_get_account_info": getAccountInfoHandler,