diff --git a/packages/javascript-api/src/lib/model/input-field/date-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/date-field-creation-request.ts
new file mode 100644
index 00000000..684e8a07
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/date-field-creation-request.ts
@@ -0,0 +1,9 @@
+import { InputFieldBase } from './input-field-base.js';
+import { InputFieldTranslation } from './input-field-translation.js';
+
+export interface DateFieldCreationRequest extends InputFieldBase {
+  type: 'DATE';
+  title: string;
+  visitorFacingTitle?: string;
+  translations?: InputFieldTranslation[];
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/email-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/email-field-creation-request.ts
new file mode 100644
index 00000000..5e343ad7
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/email-field-creation-request.ts
@@ -0,0 +1,6 @@
+import { InputFieldBase } from './input-field-base.js';
+
+export interface EmailFieldCreationRequest extends InputFieldBase {
+  type: 'EMAIL';
+  isRequiredInAppointments: boolean;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/first-name-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/first-name-field-creation-request.ts
new file mode 100644
index 00000000..8f10feff
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/first-name-field-creation-request.ts
@@ -0,0 +1,5 @@
+import { InputFieldBase } from './input-field-base.js';
+
+export interface FirstNameFieldCreationRequest extends InputFieldBase {
+  type: 'FIRST_NAME';
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/input-field-base.ts b/packages/javascript-api/src/lib/model/input-field/input-field-base.ts
new file mode 100644
index 00000000..4f6da999
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/input-field-base.ts
@@ -0,0 +1,15 @@
+import { LineRef } from './line-ref.js';
+import { LocationRef } from './location-ref.js';
+import { UUID } from '../uuid.js';
+
+export interface InputFieldBase {
+  id: UUID;
+  location: LocationRef;
+  isMandatoryBeforeAdded: boolean;
+  isMandatoryBeforeServed: boolean;
+  isMandatoryInRemoteSignIn: boolean;
+  isVisibleInWaitingDrawer: boolean;
+  isVisibleInServingDrawer: boolean;
+  visibleForLines: LineRef[];
+  showInRemoteSignIn: boolean;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/input-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/input-field-creation-request.ts
new file mode 100644
index 00000000..d0b9dfdd
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/input-field-creation-request.ts
@@ -0,0 +1,24 @@
+import { DateFieldCreationRequest } from './date-field-creation-request.js';
+import { EmailFieldCreationRequest } from './email-field-creation-request.js';
+import { FirstNameFieldCreationRequest } from './first-name-field-creation-request.js';
+import { LastNameFieldCreationRequest } from './last-name-field-creation-request.js';
+import { NumericFieldCreationRequest } from './numeric-field-creation-request.js';
+import { PhoneNumberFieldCreationRequest } from './phone-number-field-creation-request.js';
+import { SelectFieldCreationRequest } from './select-field-creation-request.js';
+import { TextFieldCreationRequest } from './text-field-creation-request.js';
+import { UrlFieldCreationRequest } from './url-field-creation-request.js';
+
+/**
+ * A discriminated union of all input field creation request types.
+ * The `type` field determines which properties are available.
+ */
+export type InputFieldCreationRequest =
+  | TextFieldCreationRequest
+  | SelectFieldCreationRequest
+  | EmailFieldCreationRequest
+  | PhoneNumberFieldCreationRequest
+  | FirstNameFieldCreationRequest
+  | LastNameFieldCreationRequest
+  | UrlFieldCreationRequest
+  | DateFieldCreationRequest
+  | NumericFieldCreationRequest;
diff --git a/packages/javascript-api/src/lib/model/input-field/input-field-translation.ts b/packages/javascript-api/src/lib/model/input-field/input-field-translation.ts
new file mode 100644
index 00000000..707e63d3
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/input-field-translation.ts
@@ -0,0 +1,5 @@
+export interface InputFieldTranslation {
+  languageCode: string;
+  title?: string;
+  visitorFacingTitle?: string;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/last-name-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/last-name-field-creation-request.ts
new file mode 100644
index 00000000..0f549d07
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/last-name-field-creation-request.ts
@@ -0,0 +1,6 @@
+import { InputFieldBase } from './input-field-base.js';
+
+export interface LastNameFieldCreationRequest extends InputFieldBase {
+  type: 'LAST_NAME';
+  isRequiredInAppointments?: boolean;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/line-ref.ts b/packages/javascript-api/src/lib/model/input-field/line-ref.ts
new file mode 100644
index 00000000..cc2a7d87
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/line-ref.ts
@@ -0,0 +1,3 @@
+export interface LineRef {
+  id: number;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/location-ref.ts b/packages/javascript-api/src/lib/model/input-field/location-ref.ts
new file mode 100644
index 00000000..e973637a
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/location-ref.ts
@@ -0,0 +1,3 @@
+export interface LocationRef {
+  id: number;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/numeric-field-constraints.ts b/packages/javascript-api/src/lib/model/input-field/numeric-field-constraints.ts
new file mode 100644
index 00000000..e1f5f347
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/numeric-field-constraints.ts
@@ -0,0 +1,5 @@
+export interface NumericFieldConstraints {
+  min?: number;
+  max?: number;
+  scale: number;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/numeric-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/numeric-field-creation-request.ts
new file mode 100644
index 00000000..45da9b76
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/numeric-field-creation-request.ts
@@ -0,0 +1,11 @@
+import { InputFieldBase } from './input-field-base.js';
+import { InputFieldTranslation } from './input-field-translation.js';
+import { NumericFieldConstraints } from './numeric-field-constraints.js';
+
+export interface NumericFieldCreationRequest extends InputFieldBase {
+  type: 'NUMERIC';
+  title: string;
+  visitorFacingTitle?: string;
+  translations?: InputFieldTranslation[];
+  constraints?: NumericFieldConstraints;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/phone-number-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/phone-number-field-creation-request.ts
new file mode 100644
index 00000000..1d8c70d6
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/phone-number-field-creation-request.ts
@@ -0,0 +1,5 @@
+import { InputFieldBase } from './input-field-base.js';
+
+export interface PhoneNumberFieldCreationRequest extends InputFieldBase {
+  type: 'PHONE_NUMBER';
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/select-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/select-field-creation-request.ts
new file mode 100644
index 00000000..4c84dd5d
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/select-field-creation-request.ts
@@ -0,0 +1,12 @@
+import { InputFieldBase } from './input-field-base.js';
+import { InputFieldTranslation } from './input-field-translation.js';
+import { SelectOption } from './select-option.js';
+
+export interface SelectFieldCreationRequest extends InputFieldBase {
+  type: 'SELECT';
+  title: string;
+  visitorFacingTitle?: string;
+  multiSelect: boolean;
+  options: SelectOption[];
+  translations?: InputFieldTranslation[];
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/select-option-translation.ts b/packages/javascript-api/src/lib/model/input-field/select-option-translation.ts
new file mode 100644
index 00000000..91c07c69
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/select-option-translation.ts
@@ -0,0 +1,4 @@
+export interface SelectOptionTranslation {
+  languageCode: string;
+  title?: string;
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/select-option.ts b/packages/javascript-api/src/lib/model/input-field/select-option.ts
new file mode 100644
index 00000000..36575350
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/select-option.ts
@@ -0,0 +1,9 @@
+import { UUID } from '../uuid.js';
+import { SelectOptionTranslation } from './select-option-translation.js';
+
+export interface SelectOption {
+  id: UUID;
+  title: string;
+  color?: string;
+  translations?: SelectOptionTranslation[];
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/text-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/text-field-creation-request.ts
new file mode 100644
index 00000000..2a9bb412
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/text-field-creation-request.ts
@@ -0,0 +1,9 @@
+import { InputFieldBase } from './input-field-base.js';
+import { InputFieldTranslation } from './input-field-translation.js';
+
+export interface TextFieldCreationRequest extends InputFieldBase {
+  type: 'TEXT';
+  title: string;
+  visitorFacingTitle?: string;
+  translations?: InputFieldTranslation[];
+}
diff --git a/packages/javascript-api/src/lib/model/input-field/url-field-creation-request.ts b/packages/javascript-api/src/lib/model/input-field/url-field-creation-request.ts
new file mode 100644
index 00000000..d2bba2b0
--- /dev/null
+++ b/packages/javascript-api/src/lib/model/input-field/url-field-creation-request.ts
@@ -0,0 +1,8 @@
+import { InputFieldBase } from './input-field-base.js';
+import { InputFieldTranslation } from './input-field-translation.js';
+
+export interface UrlFieldCreationRequest extends InputFieldBase {
+  type: 'URL';
+  title: string;
+  translations?: InputFieldTranslation[];
+}
diff --git a/packages/javascript-api/src/lib/services/location/location.service.spec.ts b/packages/javascript-api/src/lib/services/location/location.service.spec.ts
index e069834c..0154d355 100644
--- a/packages/javascript-api/src/lib/services/location/location.service.spec.ts
+++ b/packages/javascript-api/src/lib/services/location/location.service.spec.ts
@@ -1,5 +1,9 @@
 import * as sinon from 'sinon';
 import { Desk } from '../../model/desk';
+import { InputFieldCreationRequest } from '../../model/input-field/input-field-creation-request';
+import { FirstNameFieldCreationRequest } from '../../model/input-field/first-name-field-creation-request';
+import { NumericFieldCreationRequest } from '../../model/input-field/numeric-field-creation-request';
+import { SelectFieldCreationRequest } from '../../model/input-field/select-field-creation-request';
 import { Qminder } from '../../qminder';
 import { LocationService } from './location.service';
 
@@ -225,6 +229,133 @@ describe('Location service', function () {
     });
   });
 
+  describe('createInputField()', function () {
+    beforeEach(function () {
+      requestStub.withArgs('input-fields').resolves({});
+    });
+
+    it('sends a TEXT field with correct URL, method, body and headers', async function () {
+      const textField: InputFieldCreationRequest = {
+        type: 'TEXT',
+        id: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
+        location: { id: LOCATION_ID },
+        title: 'Email address',
+        visitorFacingTitle: 'Your email',
+        isMandatoryBeforeAdded: false,
+        isMandatoryBeforeServed: false,
+        isMandatoryInRemoteSignIn: false,
+        isVisibleInWaitingDrawer: true,
+        isVisibleInServingDrawer: true,
+        visibleForLines: [{ id: 1 }, { id: 2 }],
+        showInRemoteSignIn: false,
+        translations: [
+          {
+            languageCode: 'et',
+            title: 'E-posti aadress',
+            visitorFacingTitle: 'Sinu e-post',
+          },
+        ],
+      };
+
+      await LocationService.createInputField(textField);
+      expect(
+        requestStub.calledWith('input-fields', {
+          method: 'POST',
+          body: JSON.stringify(textField),
+          headers: { 'X-Qminder-API-Version': '2020-09-01' },
+        }),
+      ).toBeTruthy();
+    });
+
+    it('sends a SELECT field with options', async function () {
+      const selectField: SelectFieldCreationRequest = {
+        type: 'SELECT',
+        id: 'b2c3d4e5-f6a7-8901-bcde-f12345678901',
+        location: { id: LOCATION_ID },
+        title: 'Service type',
+        multiSelect: false,
+        options: [
+          {
+            id: 'c3d4e5f6-a7b8-9012-cdef-123456789012',
+            title: 'Documents',
+            color: '#FF0000',
+            translations: [{ languageCode: 'et', title: 'Dokumendid' }],
+          },
+          {
+            id: 'd4e5f6a7-b8c9-0123-defa-234567890123',
+            title: 'Consultation',
+          },
+        ],
+        isMandatoryBeforeAdded: true,
+        isMandatoryBeforeServed: false,
+        isMandatoryInRemoteSignIn: false,
+        isVisibleInWaitingDrawer: true,
+        isVisibleInServingDrawer: true,
+        visibleForLines: [],
+        showInRemoteSignIn: false,
+      };
+
+      await LocationService.createInputField(selectField);
+      expect(
+        requestStub.calledWith('input-fields', {
+          method: 'POST',
+          body: JSON.stringify(selectField),
+          headers: { 'X-Qminder-API-Version': '2020-09-01' },
+        }),
+      ).toBeTruthy();
+    });
+
+    it('sends a NUMERIC field with constraints', async function () {
+      const numericField: NumericFieldCreationRequest = {
+        type: 'NUMERIC',
+        id: 'e5f6a7b8-c9d0-1234-efab-345678901234',
+        location: { id: LOCATION_ID },
+        title: 'Amount',
+        constraints: { min: 0, max: 1000, scale: 2 },
+        isMandatoryBeforeAdded: false,
+        isMandatoryBeforeServed: true,
+        isMandatoryInRemoteSignIn: false,
+        isVisibleInWaitingDrawer: false,
+        isVisibleInServingDrawer: true,
+        visibleForLines: [],
+        showInRemoteSignIn: false,
+      };
+
+      await LocationService.createInputField(numericField);
+      expect(
+        requestStub.calledWith('input-fields', {
+          method: 'POST',
+          body: JSON.stringify(numericField),
+          headers: { 'X-Qminder-API-Version': '2020-09-01' },
+        }),
+      ).toBeTruthy();
+    });
+
+    it('sends a FIRST_NAME field with only base properties', async function () {
+      const firstNameField: FirstNameFieldCreationRequest = {
+        type: 'FIRST_NAME',
+        id: 'f6a7b8c9-d0e1-2345-faba-456789012345',
+        location: { id: LOCATION_ID },
+        isMandatoryBeforeAdded: false,
+        isMandatoryBeforeServed: false,
+        isMandatoryInRemoteSignIn: false,
+        isVisibleInWaitingDrawer: true,
+        isVisibleInServingDrawer: true,
+        visibleForLines: [],
+        showInRemoteSignIn: false,
+      };
+
+      await LocationService.createInputField(firstNameField);
+      expect(
+        requestStub.calledWith('input-fields', {
+          method: 'POST',
+          body: JSON.stringify(firstNameField),
+          headers: { 'X-Qminder-API-Version': '2020-09-01' },
+        }),
+      ).toBeTruthy();
+    });
+  });
+
   afterEach(function () {
     requestStub.restore();
   });
diff --git a/packages/javascript-api/src/lib/services/location/location.service.ts b/packages/javascript-api/src/lib/services/location/location.service.ts
index 5f19e679..00394d7f 100644
--- a/packages/javascript-api/src/lib/services/location/location.service.ts
+++ b/packages/javascript-api/src/lib/services/location/location.service.ts
@@ -1,4 +1,5 @@
 import {
+  createInputField,
   details,
   getDesks,
   list,
@@ -94,4 +95,11 @@ export const LocationService = {
    * Calls the following HTTP API: `PUT /locations/<ID>/opening-hours/exceptions`
    */
   setOpeningHoursExceptions,
+
+  /**
+   * Create a new input field for a location.
+   *
+   * Calls the following HTTP API: `POST /input-fields`
+   */
+  createInputField,
 };
diff --git a/packages/javascript-api/src/lib/services/location/location.ts b/packages/javascript-api/src/lib/services/location/location.ts
index f09cac66..4730b6d8 100644
--- a/packages/javascript-api/src/lib/services/location/location.ts
+++ b/packages/javascript-api/src/lib/services/location/location.ts
@@ -1,11 +1,11 @@
 import { Desk } from '../../model/desk.js';
+import { InputFieldCreationRequest } from '../../model/input-field/input-field-creation-request.js';
 import { Location } from '../../model/location.js';
 import { OpeningHours } from '../../model/opening-hours.js';
 import { OpeningHoursException } from '../../model/opening-hours-exception.js';
 import { extractId, IdOrObject } from '../../util/id-or-object.js';
 import { ApiBase } from '../api-base/api-base.js';
-
-const V2_HEADERS = { 'X-Qminder-API-Version': '2020-09-01' } as const;
+import { V2_HEADERS } from '../v2-headers.js';
 
 export function list(): Promise<Location[]> {
   return ApiBase.request('v1/locations/').then(
@@ -55,3 +55,13 @@ export async function setOpeningHoursExceptions(
     headers: V2_HEADERS,
   });
 }
+
+export async function createInputField(
+  inputField: InputFieldCreationRequest,
+): Promise<void> {
+  await ApiBase.request('input-fields', {
+    method: 'POST',
+    body: JSON.stringify(inputField),
+    headers: V2_HEADERS,
+  });
+}
diff --git a/packages/javascript-api/src/lib/services/ticket/ticket.ts b/packages/javascript-api/src/lib/services/ticket/ticket.ts
index ce259abe..3366051d 100644
--- a/packages/javascript-api/src/lib/services/ticket/ticket.ts
+++ b/packages/javascript-api/src/lib/services/ticket/ticket.ts
@@ -10,6 +10,7 @@ import {
   extractIdToNumber,
 } from '../../util/id-or-object.js';
 import { ApiBase } from '../api-base/api-base.js';
+import { V2_HEADERS } from '../v2-headers.js';
 import { ResponseValidationError } from '../../model/errors/response-validation-error.js';
 import { ExternalData } from '../../model/ticket/external-data.js';
 
@@ -329,9 +330,7 @@ export async function create(
   const result: TicketCreatedResponse = await ApiBase.request('tickets', {
     method: 'POST',
     body,
-    headers: {
-      'X-Qminder-API-Version': '2020-09-01',
-    },
+    headers: V2_HEADERS,
   });
   if (!result.id) {
     throw new ResponseValidationError('Response does not contain "id"');
@@ -360,9 +359,7 @@ export async function edit(
   await ApiBase.request(`tickets/${ticketId}`, {
     method: 'PATCH',
     body,
-    headers: {
-      'X-Qminder-API-Version': '2020-09-01',
-    },
+    headers: V2_HEADERS,
   });
 }
 
diff --git a/packages/javascript-api/src/lib/services/v2-headers.ts b/packages/javascript-api/src/lib/services/v2-headers.ts
new file mode 100644
index 00000000..3fae697b
--- /dev/null
+++ b/packages/javascript-api/src/lib/services/v2-headers.ts
@@ -0,0 +1 @@
+export const V2_HEADERS = { 'X-Qminder-API-Version': '2020-09-01' } as const;
diff --git a/packages/javascript-api/src/public-api/model.ts b/packages/javascript-api/src/public-api/model.ts
index 95e1f81b..dca6a840 100644
--- a/packages/javascript-api/src/public-api/model.ts
+++ b/packages/javascript-api/src/public-api/model.ts
@@ -34,3 +34,19 @@ export {
 export { TicketLabelRequest } from '../lib/model/ticket/ticket-label-request.js';
 export { TicketType } from '../lib/model/ticket/ticket-type.js';
 export { UUID } from '../lib/model/uuid.js';
+export { InputFieldCreationRequest } from '../lib/model/input-field/input-field-creation-request.js';
+export { LocationRef } from '../lib/model/input-field/location-ref.js';
+export { LineRef } from '../lib/model/input-field/line-ref.js';
+export { InputFieldTranslation } from '../lib/model/input-field/input-field-translation.js';
+export { SelectOption } from '../lib/model/input-field/select-option.js';
+export { SelectOptionTranslation } from '../lib/model/input-field/select-option-translation.js';
+export { NumericFieldConstraints } from '../lib/model/input-field/numeric-field-constraints.js';
+export { TextFieldCreationRequest } from '../lib/model/input-field/text-field-creation-request.js';
+export { SelectFieldCreationRequest } from '../lib/model/input-field/select-field-creation-request.js';
+export { EmailFieldCreationRequest } from '../lib/model/input-field/email-field-creation-request.js';
+export { PhoneNumberFieldCreationRequest } from '../lib/model/input-field/phone-number-field-creation-request.js';
+export { FirstNameFieldCreationRequest } from '../lib/model/input-field/first-name-field-creation-request.js';
+export { LastNameFieldCreationRequest } from '../lib/model/input-field/last-name-field-creation-request.js';
+export { UrlFieldCreationRequest } from '../lib/model/input-field/url-field-creation-request.js';
+export { DateFieldCreationRequest } from '../lib/model/input-field/date-field-creation-request.js';
+export { NumericFieldCreationRequest } from '../lib/model/input-field/numeric-field-creation-request.js';