diff --git a/.eslintrc.json b/.eslintrc.json
index 2a0df09..a64089a 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -16,7 +16,8 @@
       "files": ["tests/**/*.spec.ts"],
       "rules": {
         "@typescript-eslint/no-unused-expressions": "off",
-        "@typescript-eslint/consistent-type-assertions": "off"
+        "@typescript-eslint/consistent-type-assertions": "off",
+        "no-new": "off"
       }
     }
   ],
diff --git a/src/models/ApiResponse.ts b/src/models/ApiResponse.ts
index e179b06..9965142 100644
--- a/src/models/ApiResponse.ts
+++ b/src/models/ApiResponse.ts
@@ -2,6 +2,7 @@ import { App } from './App';
 import { CollectionResponse } from './CollectionResponse';
 import { CreatedWithIdResponse } from './CreatedWithIdResponse';
 import { Field } from './Field';
+import { FileInfo } from './FileInfo';
 import { GetPagedAppsResponse } from './GetPagedAppsResponse';
 import { GetPagedFieldsResponse } from './GetPagedFieldsResponse';
 
@@ -218,4 +219,25 @@ export class ApiResponse<T> {
       createdWithIdResponse
     );
   }
+
+  asFileInfoType(): ApiResponse<FileInfo> {
+    const apiResponse = this as ApiResponse<any>;
+
+    const fileInfo = new FileInfo(
+      apiResponse.data.type,
+      apiResponse.data.contentType,
+      apiResponse.data.name,
+      apiResponse.data.createdDate,
+      apiResponse.data.modifiedDate,
+      apiResponse.data.owner,
+      apiResponse.data.notes,
+      apiResponse.data.fileHref
+    );
+
+    return new ApiResponse<FileInfo>(
+      apiResponse.statusCode,
+      apiResponse.message,
+      fileInfo
+    );
+  }
 }
diff --git a/src/models/FileInfo.ts b/src/models/FileInfo.ts
new file mode 100644
index 0000000..c333349
--- /dev/null
+++ b/src/models/FileInfo.ts
@@ -0,0 +1,36 @@
+import { FieldType } from '../enums/FieldType';
+
+export class FileInfo {
+  public type: FieldType;
+  public contentType: string;
+  public name: string;
+  public createdDate: Date;
+  public modifiedDate: Date;
+  public owner: string;
+  public notes: string;
+  public fileHref: string;
+
+  constructor(
+    type: string,
+    contentType: string,
+    name: string,
+    createdDate: Date,
+    modifiedDate: Date,
+    owner: string,
+    notes: string,
+    fileHref: string
+  ) {
+    if (FieldType[type] === undefined) {
+      throw new Error(`The type '${type}' is not a valid FieldType.`);
+    }
+
+    this.type = FieldType[type];
+    this.contentType = contentType;
+    this.name = name;
+    this.createdDate = createdDate;
+    this.modifiedDate = modifiedDate;
+    this.owner = owner;
+    this.notes = notes;
+    this.fileHref = fileHref;
+  }
+}
diff --git a/src/models/OnspringClient.ts b/src/models/OnspringClient.ts
index 85deb94..96dd540 100644
--- a/src/models/OnspringClient.ts
+++ b/src/models/OnspringClient.ts
@@ -12,6 +12,7 @@ import { type Field } from './Field';
 import { type GetPagedFieldsResponse } from './GetPagedFieldsResponse';
 import { type SaveFileRequest } from './SaveFileRequest';
 import { type CreatedWithIdResponse } from './CreatedWithIdResponse';
+import { type FileInfo } from './FileInfo';
 
 /**
  * @class OnspringClient - A client that can communicate with the Onspring API.
@@ -104,7 +105,8 @@ export class OnspringClient {
     appIds: number[]
   ): Promise<ApiResponse<CollectionResponse<App>>> {
     const endpoint = EndpointFactory.getAppsByIdsEndpoint();
-    const apiResponse = await this.post<any>(endpoint, appIds);
+    const uniqueIds = [...new Set(appIds)];
+    const apiResponse = await this.post<any>(endpoint, uniqueIds);
 
     if (apiResponse.isSuccessful === false) {
       return apiResponse;
@@ -171,6 +173,33 @@ export class OnspringClient {
     return apiResponse.asGetPagedFieldsResponseType();
   }
 
+  /**
+   * @method getFileInfoById - Gets a file's information by its id.
+   * @param {number} recordId - The id of the record that the file is attached to.
+   * @param {number} fieldId - The id of the field that the file is attached to.
+   * @param {number} fileId - The id of the file to get the information for.
+   * @returns {Promise<ApiResponse<FileInfo>>} - A promise that resolves to an ApiResponse of type FileInfo.
+   */
+  public async getFileInfoById(
+    recordId: number,
+    fieldId: number,
+    fileId: number
+  ): Promise<ApiResponse<FileInfo>> {
+    const endpoint = EndpointFactory.getFileInfoByIdEndpoint(
+      recordId,
+      fieldId,
+      fileId
+    );
+
+    const apiResponse = await this.get<any>(endpoint);
+
+    if (apiResponse.isSuccessful === false) {
+      return apiResponse;
+    }
+
+    return apiResponse.asFileInfoType();
+  }
+
   /**
    * @method saveFile - Saves a file to a record in Onspring.
    * @param {SaveFileRequest} request - The request that will be used to save the file.
diff --git a/tests/FileInfo.spec.ts b/tests/FileInfo.spec.ts
new file mode 100644
index 0000000..22c1d9d
--- /dev/null
+++ b/tests/FileInfo.spec.ts
@@ -0,0 +1,190 @@
+import { FileInfo } from '../src/models/FileInfo';
+import { expect } from 'chai';
+
+describe('FileInfo', function () {
+  it('should be defined', function () {
+    expect(FileInfo).to.not.be.undefined;
+  });
+
+  it('should have a constructor', function () {
+    expect(FileInfo).to.have.property('constructor');
+  });
+
+  it('should have 8 parameters', function () {
+    expect(FileInfo).to.have.lengthOf(8);
+  });
+
+  it('should create a new instance of FileInfo', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.be.an.instanceOf(FileInfo);
+  });
+
+  it('should throw an error when the type is not a valid FieldType', function () {
+    expect(() => {
+      new FileInfo(
+        'InvalidType',
+        'application/pdf',
+        'FileName.pdf',
+        new Date(),
+        new Date(),
+        'File Owner',
+        'notes',
+        'https://api.onspring.dev'
+      );
+    }).to.throw("The type 'InvalidType' is not a valid FieldType.");
+  });
+
+  it('should have a type property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('type');
+  });
+
+  it('should have a contentType property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('contentType');
+  });
+
+  it('should have a name property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('name');
+  });
+
+  it('should have a createdDate property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('createdDate');
+  });
+
+  it('should have a modifiedDate property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('modifiedDate');
+  });
+
+  it('should have a owner property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('owner');
+  });
+
+  it('should have a notes property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('notes');
+  });
+
+  it('should have a fileHref property', function () {
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      new Date(),
+      new Date(),
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo).to.have.property('fileHref');
+  });
+
+  it('should set properties to the correct values passed to the constructor', function () {
+    const date = new Date();
+
+    const fileInfo = new FileInfo(
+      'Attachment',
+      'application/pdf',
+      'FileName.pdf',
+      date,
+      date,
+      'File Owner',
+      'notes',
+      'https://api.onspring.dev'
+    );
+
+    expect(fileInfo.type).to.equal('Attachment');
+    expect(fileInfo.contentType).to.equal('application/pdf');
+    expect(fileInfo.name).to.equal('FileName.pdf');
+    expect(fileInfo.createdDate).to.be.deep.equal(date);
+    expect(fileInfo.modifiedDate).to.be.deep.equal(date);
+    expect(fileInfo.owner).to.equal('File Owner');
+    expect(fileInfo.notes).to.equal('notes');
+    expect(fileInfo.fileHref).to.equal('https://api.onspring.dev');
+  });
+});
diff --git a/tests/OnspringClient.spec.ts b/tests/OnspringClient.spec.ts
index 73180c3..53dff45 100644
--- a/tests/OnspringClient.spec.ts
+++ b/tests/OnspringClient.spec.ts
@@ -16,6 +16,7 @@ import { GetPagedFieldsResponse } from '../src/models/GetPagedFieldsResponse';
 import { SaveFileRequest } from '../src/models/SaveFileRequest';
 import { Readable } from 'stream';
 import { CreatedWithIdResponse } from '../src/models/CreatedWithIdResponse';
+import { FileInfo } from '../src/models/FileInfo';
 
 describe('OnspringClient', function () {
   const baseUrl = 'https://api.onspring.dev';
@@ -1495,4 +1496,214 @@ describe('OnspringClient', function () {
       expect(result.data).to.be.null;
     });
   });
+
+  describe('getFileInfoById', function () {
+    it('should be defined', function () {
+      expect(OnspringClient.prototype.getFileInfoById).to.be.not.undefined;
+    });
+
+    it('should be a function', function () {
+      expect(OnspringClient.prototype.getFileInfoById).to.be.a('function');
+    });
+
+    it('should return a promise', function () {
+      expect(
+        new OnspringClient(baseUrl, apiKey).getFileInfoById(1, 1, 1)
+      ).to.be.instanceOf(Promise);
+    });
+
+    it('should return a promise that resolves to an api response when request is successful', async function () {
+      const client = new OnspringClient(baseUrl, apiKey);
+
+      const mockAxiosClient = axios.create({
+        baseURL: baseUrl,
+        headers: {
+          'x-apikey': apiKey,
+          'x-api-version': '2',
+        },
+      });
+
+      sinon.stub(mockAxiosClient, 'get').returns(
+        Promise.resolve({
+          status: 200,
+          statusText: 'OK',
+          data: {
+            type: 'Attachment',
+            contentType: 'string',
+            name: 'string',
+            createdDate: '2023-02-04T20:15:45.007Z',
+            modifiedDate: '2023-02-04T20:15:45.007Z',
+            owner: 'string',
+            notes: 'string',
+            fileHref: 'string',
+          },
+          headers: {},
+          config: {} as InternalAxiosRequestConfig,
+        } as AxiosResponse)
+      );
+
+      sinon.stub(client, '_client' as any).value(mockAxiosClient);
+
+      const result = await client.getFileInfoById(1, 1, 1);
+
+      expect(result).to.be.instanceOf(ApiResponse<FileInfo>);
+      expect(result).to.have.property('statusCode', 200);
+      expect(result).to.have.property('isSuccessful', true);
+      expect(result.message).to.be.equal('');
+      expect(result.data).to.be.not.null;
+      expect(result.data).to.be.instanceOf(FileInfo);
+      expect(result.data).to.have.property('type', 'Attachment');
+      expect(result.data).to.have.property('contentType', 'string');
+      expect(result.data).to.have.property('name', 'string');
+      expect(result.data).to.have.property(
+        'createdDate',
+        '2023-02-04T20:15:45.007Z'
+      );
+      expect(result.data).to.have.property(
+        'modifiedDate',
+        '2023-02-04T20:15:45.007Z'
+      );
+      expect(result.data).to.have.property('owner', 'string');
+      expect(result.data).to.have.property('notes', 'string');
+      expect(result.data).to.have.property('fileHref', 'string');
+    });
+
+    it('should return a promise that resolves to an api response when request receives a 400 response', async function () {
+      const client = new OnspringClient(baseUrl, apiKey);
+
+      const mockAxiosClient = axios.create({
+        baseURL: baseUrl,
+        headers: {
+          'x-apikey': apiKey,
+          'x-api-version': '2',
+        },
+      });
+
+      sinon.stub(mockAxiosClient, 'get').returns(
+        Promise.resolve({
+          status: 400,
+          statusText: 'Bad Request',
+          data: {
+            field: ['Field requested is not a file type field.'],
+          },
+          headers: {},
+          config: {} as InternalAxiosRequestConfig,
+        } as AxiosResponse)
+      );
+
+      sinon.stub(client, '_client' as any).value(mockAxiosClient);
+
+      const result = await client.getFileInfoById(1, 1, 1);
+
+      expect(result).to.be.instanceOf(ApiResponse);
+      expect(result).to.have.property('statusCode', 400);
+      expect(result).to.have.property('isSuccessful', false);
+      expect(result.message).to.equal(
+        '{"field":["Field requested is not a file type field."]}'
+      );
+      expect(result.data).to.be.null;
+    });
+
+    it('should return a promise that resolves to an api response when request receives a 401 response', async function () {
+      const client = new OnspringClient(baseUrl, apiKey);
+
+      const mockAxiosClient = axios.create({
+        baseURL: baseUrl,
+        headers: {
+          'x-apikey': apiKey,
+          'x-api-version': '2',
+        },
+      });
+
+      sinon.stub(mockAxiosClient, 'get').returns(
+        Promise.resolve({
+          status: 401,
+          statusText: 'Unauthorized',
+          headers: {},
+          config: {} as InternalAxiosRequestConfig,
+        } as AxiosResponse)
+      );
+
+      sinon.stub(client, '_client' as any).value(mockAxiosClient);
+
+      const result = await client.getFileInfoById(1, 1, 1);
+
+      expect(result).to.be.instanceOf(ApiResponse);
+      expect(result).to.have.property('statusCode', 401);
+      expect(result).to.have.property('isSuccessful', false);
+      expect(result.message).to.be.undefined;
+      expect(result.data).to.be.null;
+    });
+
+    it('should return a promise that resolves to an api response when request receives a 403 response', async function () {
+      const client = new OnspringClient(baseUrl, apiKey);
+
+      const mockAxiosClient = axios.create({
+        baseURL: baseUrl,
+        headers: {
+          'x-apikey': apiKey,
+          'x-api-version': '2',
+        },
+      });
+
+      sinon.stub(mockAxiosClient, 'get').returns(
+        Promise.resolve({
+          status: 403,
+          statusText: 'Forbidden',
+          data: {
+            message:
+              'The user does not have permission to access this resource.',
+          },
+          headers: {},
+          config: {} as InternalAxiosRequestConfig,
+        } as AxiosResponse)
+      );
+
+      sinon.stub(client, '_client' as any).value(mockAxiosClient);
+
+      const result = await client.getFileInfoById(1, 1, 1);
+
+      expect(result).to.be.instanceOf(ApiResponse);
+      expect(result).to.have.property('statusCode', 403);
+      expect(result).to.have.property('isSuccessful', false);
+      expect(result.message).to.equal(
+        'The user does not have permission to access this resource.'
+      );
+      expect(result.data).to.be.null;
+    });
+
+    it('should return a promise that resolves to an api response when request receives a 404 response', async function () {
+      const client = new OnspringClient(baseUrl, apiKey);
+
+      const mockAxiosClient = axios.create({
+        baseURL: baseUrl,
+        headers: {
+          'x-apikey': apiKey,
+          'x-api-version': '2',
+        },
+      });
+
+      sinon.stub(mockAxiosClient, 'get').returns(
+        Promise.resolve({
+          status: 404,
+          statusText: 'Not Found',
+          data: {
+            message: 'The requested resource was not found.',
+          },
+          headers: {},
+          config: {} as InternalAxiosRequestConfig,
+        } as AxiosResponse)
+      );
+
+      sinon.stub(client, '_client' as any).value(mockAxiosClient);
+
+      const result = await client.getFileInfoById(1, 1, 1);
+
+      expect(result).to.be.instanceOf(ApiResponse);
+      expect(result).to.have.property('statusCode', 404);
+      expect(result).to.have.property('isSuccessful', false);
+      expect(result.message).to.equal('The requested resource was not found.');
+      expect(result.data).to.be.null;
+    });
+  });
 });
diff --git a/tsconfig.cjs.json b/tsconfig.cjs.json
index 56142a4..8ab4792 100644
--- a/tsconfig.cjs.json
+++ b/tsconfig.cjs.json
@@ -1,8 +1,7 @@
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
-    "module": "commonjs",
-    "target": "es2015",
+    "module": "CommonJS",
     "outDir": "./dist/cjs"
   }
 }
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
index 55b5cad..72f3b9e 100644
--- a/tsconfig.esm.json
+++ b/tsconfig.esm.json
@@ -1,8 +1,7 @@
 {
   "extends": "./tsconfig.json",
   "compilerOptions": {
-    "module": "esnext",
-    "target": "es2015",
+    "module": "ES6",
     "outDir": "./dist/esm"
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
index d344dd5..c3cca18 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,10 +1,11 @@
 {
   "compilerOptions": {
     "strictNullChecks": true,
-    "moduleResolution": "node",
     "declaration": true,
     "declarationDir": "./dist/types",
-    "esModuleInterop": true
+    "esModuleInterop": true,
+    "target": "ES6",
+    "moduleResolution": "node"
   },
   "include": ["src/**/*"],
   "ts-node": {