diff --git a/api/src/availability/availability.controller.ts b/api/src/availability/availability.controller.ts
new file mode 100644
index 0000000..e11bb88
--- /dev/null
+++ b/api/src/availability/availability.controller.ts
@@ -0,0 +1,118 @@
+import { Body, Controller, Delete, Param, Patch, Post } from '@nestjs/common';
+import { AvailabilityService } from './availability.service';
+import {
+  Action,
+  insertAvailabilitySchema,
+  updateAvailabilitySchema,
+} from '@hkrecruitment/shared';
+import { JoiValidate } from '../joi-validation/joi-validate.decorator';
+import {
+  ApiBadRequestResponse,
+  ApiBearerAuth,
+  ApiForbiddenResponse,
+  ApiNotFoundResponse,
+  ApiCreatedResponse,
+  ApiOkResponse,
+  ApiTags,
+  ApiConflictResponse,
+  ApiNoContentResponse,
+  ApiBadGatewayResponse,
+} from '@nestjs/swagger';
+import { CheckPolicies } from 'src/authorization/check-policies.decorator';
+import { Availability } from './availability.entity';
+import Joi from 'joi';
+
+@ApiBearerAuth()
+@ApiTags('timeslots')
+@Controller('timeslots')
+export class AvailabilityController {
+  constructor(private readonly availabilityService: AvailabilityService) {}
+
+  @ApiBadRequestResponse()
+  @ApiForbiddenResponse()
+  @ApiNotFoundResponse()
+  @ApiOkResponse()
+  @ApiNoContentResponse()
+  @ApiBadGatewayResponse()
+  async listAvailabilities(): Promise<Availability[]> {
+    const matches = await this.availabilityService.listAvailabilities();
+    return matches;
+  }
+
+  @ApiBadRequestResponse()
+  @ApiForbiddenResponse()
+  @ApiNotFoundResponse()
+  @ApiOkResponse()
+  @ApiNoContentResponse()
+  @ApiBadGatewayResponse()
+  @JoiValidate({
+    param: Joi.number().positive().integer().required(),
+  })
+  async findAvailabilityById(id: number): Promise<Availability> {
+    const matches = await this.availabilityService.findAvailabilityById(id);
+    return matches;
+  }
+
+  @ApiBadRequestResponse()
+  @ApiForbiddenResponse()
+  @ApiNotFoundResponse()
+  @ApiOkResponse()
+  @ApiNoContentResponse()
+  @ApiBadGatewayResponse()
+  @ApiConflictResponse()
+  @ApiCreatedResponse()
+  @CheckPolicies((ability) => ability.can(Action.Create, 'Availability'))
+  @Post()
+  @JoiValidate({
+    body: insertAvailabilitySchema,
+  })
+  async createAvailability(@Body() body: Availability): Promise<boolean> {
+    const res = await this.availabilityService.createAvailability(body);
+    if (res.identifiers.length > 0) {
+      return true;
+    }
+    return false;
+  }
+
+  @ApiBadRequestResponse()
+  @ApiForbiddenResponse()
+  @ApiNotFoundResponse()
+  @ApiOkResponse()
+  @ApiNoContentResponse()
+  @ApiBadGatewayResponse()
+  @ApiConflictResponse()
+  @ApiCreatedResponse()
+  @CheckPolicies((ability) => ability.can(Action.Create, 'Availability'))
+  @Patch()
+  @JoiValidate({
+    body: updateAvailabilitySchema,
+  })
+  async updateAvailability(@Body() body: Availability): Promise<boolean> {
+    const res = await this.availabilityService.updateAvailability(body);
+    if (res.affected != undefined && res.affected != null && res.affected > 0) {
+      return true;
+    }
+    return false;
+  }
+
+  @ApiBadRequestResponse()
+  @ApiForbiddenResponse()
+  @ApiNotFoundResponse()
+  @ApiOkResponse()
+  @ApiNoContentResponse()
+  @ApiBadGatewayResponse()
+  @ApiConflictResponse()
+  @ApiCreatedResponse()
+  @CheckPolicies((ability) => ability.can(Action.Create, 'Availability'))
+  @Delete()
+  @JoiValidate({
+    param: Joi.number().positive().integer().required(),
+  })
+  async deleteAvailability(@Param() id: number): Promise<boolean> {
+    const res = await this.availabilityService.deleteAvailability(id);
+    if (res.affected != undefined && res.affected != null && res.affected > 0) {
+      return true;
+    }
+    return false;
+  }
+}
diff --git a/api/src/availability/availability.entity.ts b/api/src/availability/availability.entity.ts
new file mode 100644
index 0000000..97188d0
--- /dev/null
+++ b/api/src/availability/availability.entity.ts
@@ -0,0 +1,28 @@
+import {
+  Column,
+  Entity,
+  JoinColumn,
+  OneToOne,
+  PrimaryGeneratedColumn,
+} from 'typeorm';
+import {
+  Availability as AvailabilityInterface,
+  AvailabilityState,
+} from '@hkrecruitment/shared/availability';
+import { User } from 'src/users/user.entity';
+import { TimeSlot } from 'src/timeslots/timeslot.entity';
+
+@Entity()
+export class Availability implements AvailabilityInterface {
+  @PrimaryGeneratedColumn('increment')
+  id: number;
+  @Column()
+  state: AvailabilityState;
+  @Column()
+  lastModified: Date;
+  @OneToOne(() => TimeSlot)
+  timeSlot: TimeSlot;
+  @OneToOne(() => User)
+  @JoinColumn()
+  user: User;
+}
diff --git a/api/src/availability/availability.module.ts b/api/src/availability/availability.module.ts
new file mode 100644
index 0000000..10d80fb
--- /dev/null
+++ b/api/src/availability/availability.module.ts
@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { AvailabilityService } from './availability.service';
+import { AvailabilityController } from './availability.controller';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { Availability } from './availability.entity';
+import { UsersModule } from 'src/users/users.module';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([Availability]), UsersModule],
+  providers: [AvailabilityService],
+  controllers: [AvailabilityController],
+  exports: [AvailabilityService],
+})
+export class AvailabilityModule {}
diff --git a/api/src/availability/availability.service.ts b/api/src/availability/availability.service.ts
new file mode 100644
index 0000000..7f7a303
--- /dev/null
+++ b/api/src/availability/availability.service.ts
@@ -0,0 +1,38 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { DeleteResult, InsertResult, Repository, UpdateResult } from 'typeorm';
+import { Availability } from './availability.entity';
+
+@Injectable()
+export class AvailabilityService {
+  constructor(
+    @InjectRepository(Availability)
+    private readonly availabilityRepository: Repository<Availability>,
+  ) {}
+
+  async listAvailabilities(): Promise<Availability[]> {
+    return await this.availabilityRepository.find();
+  }
+
+  async findAvailabilityById(id: number): Promise<Availability> {
+    const matches = await this.availabilityRepository.findBy({
+      id: id,
+    });
+    return matches.length > 0 ? matches[0] : null;
+  }
+
+  async createAvailability(availability: Availability): Promise<InsertResult> {
+    return await this.availabilityRepository.insert(availability);
+  }
+
+  async updateAvailability(availability: Availability): Promise<UpdateResult> {
+    return await this.availabilityRepository.update(
+      availability.id,
+      availability,
+    );
+  }
+
+  async deleteAvailability(id: number): Promise<DeleteResult> {
+    return await this.availabilityRepository.delete(id);
+  }
+}
diff --git a/shared/src/availability.ts b/shared/src/availability.ts
index 1cd0e38..ecdbd38 100644
--- a/shared/src/availability.ts
+++ b/shared/src/availability.ts
@@ -1,5 +1,6 @@
+import { TimeSlot, createTimeSlotSchema } from "timeslot";
 import { Action, ApplyAbilities } from "./abilities";
-import { Person, Role } from "./person";
+import { Person, Role, createUserSchema } from "./person";
 import * as Joi from "joi";
 
 export enum AvailabilityState {
@@ -14,21 +15,33 @@ export enum AvailabilityType {
 }
 
 export interface Availability {
+  id: number;
   state: AvailabilityState;
-  timeSlotId: number;
-  member: Person;
-  // assignedAt?: Date;
-  // confirmedAt?: Date;
-  // cancelledAt?: Date;
+  lastModified: Date;
+  timeSlot: TimeSlot;
+  user: Person;
 }
 
 /* Validation schemas */
 
+export const insertAvailabilitySchema = Joi.object<Availability>({
+  state: Joi.string()
+    .valid(...Object.values(AvailabilityType))
+    .required(),
+  lastModified: Joi.date().required(),
+  timeSlot: createTimeSlotSchema.required(),
+  user: createUserSchema.required(),
+}).options({
+  stripUnknown: true,
+  abortEarly: false,
+  presence: "required",
+});
+
 export const updateAvailabilitySchema = Joi.object<Availability>({
+  id: Joi.number().positive().integer().required(),
   state: Joi.string()
     .valid(...Object.values(AvailabilityType))
     .required(),
-  timeSlotId: Joi.number().positive().required(),
 }).options({
   stripUnknown: true,
   abortEarly: false,
diff --git a/shared/src/timeslot.ts b/shared/src/timeslot.ts
index fea1951..712b603 100644
--- a/shared/src/timeslot.ts
+++ b/shared/src/timeslot.ts
@@ -1,5 +1,4 @@
 import { Action, ApplyAbilities } from "./abilities";
-import { Role } from "./person";
 import DateExtension from "@joi/date";
 import * as Joi from "joi";
 const JoiDate = Joi.extend(DateExtension);