diff --git a/__tests__/utils/CairoTypes/CairoInt8.test.ts b/__tests__/utils/CairoTypes/CairoInt8.test.ts
new file mode 100644
index 000000000..64d006ce7
--- /dev/null
+++ b/__tests__/utils/CairoTypes/CairoInt8.test.ts
@@ -0,0 +1,118 @@
+/* eslint-disable no-new */
+import { Cairoint8, P, INT_8_MAX, INT_8_MIN } from '../../../src/utils/cairoDataTypes/int8';
+
+describe('Cairoint8 class test', () => {
+  test('constructor 1 should throw on < INT_8_MIN', () => {
+    expect(() => {
+      new Cairoint8(INT_8_MIN - 1n);
+    }).toThrow('bigNumberish is smaller than INT_8_MIN');
+  });
+
+  test('constructor 1 should throw on > INT_8_MAX', () => {
+    expect(() => {
+      new Cairoint8(INT_8_MAX + 1n);
+    }).toThrow('bigNumberish is bigger than INT_8_MAX');
+  });
+
+  test('constructor 2 (number int8)', () => {
+    const i8 = new Cairoint8(5);
+    expect(i8.toApiRequest()).toEqual('5');
+  });
+
+  test('validate should throw on < INT_8_MIN', () => {
+    expect(() => {
+      Cairoint8.validate(INT_8_MIN - 1n);
+    }).toThrow('bigNumberish is smaller than INT_8_MIN');
+  });
+
+  test('validate should throw on > INT_8_MAX', () => {
+    expect(() => {
+      Cairoint8.validate(INT_8_MAX + 1n);
+    }).toThrow('bigNumberish is bigger than INT_8_MAX');
+  });
+
+  test('validate should pass and return bigint', () => {
+    const validate = Cairoint8.validate(INT_8_MAX);
+    expect(typeof validate).toBe('bigint');
+  });
+
+  test('is should return true', () => {
+    const is = Cairoint8.is(INT_8_MIN);
+    expect(is).toBe(true);
+  });
+
+  test('is should return false', () => {
+    const is = Cairoint8.is(INT_8_MAX + 1n);
+    expect(is).toBe(false);
+  });
+
+  test('constructor 1 should support BigNumberish', () => {
+    const case1 = new Cairoint8(10n);
+    const case2 = new Cairoint8(10);
+    const case3 = new Cairoint8('10');
+    const case4 = new Cairoint8('0xA');
+
+    expect(case1).toEqual(case2);
+    expect(case3).toEqual(case4);
+    expect(case1).toEqual(case4);
+  });
+
+  test('should convert INT_8_MAX to Int8 dec struct', () => {
+    const i8 = new Cairoint8(INT_8_MAX);
+    const i8Hex = i8.toInt8DecimalString();
+    expect(i8Hex).toEqual('127');
+  });
+
+  test('should convert INT_8_MAX to Int8 hex struct', () => {
+    const i8 = new Cairoint8(INT_8_MAX);
+    const i8Decimal = i8.toInt8HexString();
+    expect(i8Decimal).toEqual('0x7f');
+  });
+
+  test('isAbiType should return true', () => {
+    const isAbiType = Cairoint8.isAbiType('core::integer::i8');
+    expect(isAbiType).toBe(true);
+  });
+
+  test('should convert INT_8_MAX to BN', () => {
+    const i8 = new Cairoint8(INT_8_MAX);
+    expect(i8.toBigInt()).toEqual(INT_8_MAX);
+  });
+
+  test('should convert INT_8_MAX to API Request', () => {
+    const i8 = new Cairoint8(INT_8_MAX);
+    expect(i8.toApiRequest()).toEqual('127');
+  });
+
+  test('should convert unsigned number to API Request', () => {
+    const i8 = new Cairoint8(5);
+    expect(i8.toApiRequest()).toEqual('5');
+  });
+
+  test('should serialize negative number to felt252', () => {
+    const i8 = new Cairoint8(-5);
+    expect(i8.toApiRequest()).toEqual(
+      '3618502788666131213697322783095070105623107215331596699973092056135872020476'
+    );
+  });
+
+  test('should convert negative serialized number to BigInt', () => {
+    expect(
+      Cairoint8.negativeFelt252ToBigInt(
+        3618502788666131213697322783095070105623107215331596699973092056135872020476n
+      )
+    ).toEqual(-5n);
+  });
+
+  test('should convert negative serialized number to API Request', () => {
+    expect(() => {
+      Cairoint8.validate252Bits(P + 1n);
+    }).toThrow('bigNumberish is bigger than MAX_252_BITS');
+  });
+
+  test('should convert negative serialized number to API Request', () => {
+    expect(() => {
+      Cairoint8.validate252Bits(P - INT_8_MAX - 1n);
+    }).toThrow('bigNumberish is smaller than MIN_252_BITS');
+  });
+});
diff --git a/src/utils/cairoDataTypes/int16.ts b/src/utils/cairoDataTypes/int16.ts
new file mode 100644
index 000000000..86003aeba
--- /dev/null
+++ b/src/utils/cairoDataTypes/int16.ts
@@ -0,0 +1,107 @@
+/* eslint-disable no-bitwise */
+/**
+ * Singular class handling cairo i8 data type
+ */
+
+import { BigNumberish } from '../../types';
+import { addHexPrefix } from '../encode';
+import { CairoFelt } from './felt';
+
+export const P: bigint = 2n ** 251n + 17n * 2n ** 192n + 1n;
+export const INT_16_MAX = (1n << 15n) - 1n;
+export const INT_16_MIN = -(1n << 15n) + 1n;
+export const MIN_252_BITS = P + INT_16_MIN;
+export const MAX_252_BITS = P;
+
+export class Cairoint16 {
+  public felt252: bigint;
+
+  static abiSelector = 'core::integer::i8';
+
+  /**
+   * Default constructor (Lib usage)
+   * @param bigNumberish BigNumberish value representing i8
+   */
+
+  public constructor(int8: BigNumberish) {
+    const bigInt8 = Cairoint16.validate(int8);
+
+    if (bigInt8 > 0 && bigInt8 <= INT_16_MAX) {
+      this.felt252 = bigInt8;
+    } else {
+      this.felt252 = P + bigInt8;
+    }
+  }
+
+  /**
+   * Validate if BigNumberish can be represented as i8
+   */
+  static validate(bigNumberish: BigNumberish) {
+    const bigInt = BigInt(bigNumberish);
+    if (bigInt < INT_16_MIN) throw Error('bigNumberish is smaller than INT_8_MIN');
+    if (bigInt > INT_16_MAX) throw new Error('bigNumberish is bigger than INT_8_MAX');
+    return bigInt;
+  }
+
+  static validate252Bits(bigNumberish: BigNumberish) {
+    const bigInt = BigInt(bigNumberish);
+    if (bigInt > MAX_252_BITS) throw new Error('bigNumberish is bigger than MAX_252_BITS');
+    if (bigInt < MIN_252_BITS) throw new Error('bigNumberish is smaller than MIN_252_BITS');
+    return bigInt;
+  }
+
+  /**
+   * Check if BigNumberish can be represented as i8
+   */
+  static is(bigNumberish: BigNumberish) {
+    try {
+      Cairoint16.validate(bigNumberish);
+    } catch (error) {
+      return false;
+    }
+    return true;
+  }
+
+  /**
+   * Check if provided abi type is this data type
+   */
+  static isAbiType(abiType: string) {
+    return abiType === Cairoint16.abiSelector;
+  }
+
+  static negativeFelt252ToBigInt(bigNumberish: BigNumberish) {
+    const bigInt = this.validate252Bits(bigNumberish);
+    return BigInt(bigInt - P);
+  }
+
+  /**
+   * Return bigint representation
+   */
+  toBigInt() {
+    return this.felt252;
+  }
+
+  /**
+   * Return i8 structure with HexString
+   */
+  toInt16HexString() {
+    return addHexPrefix(this.felt252.toString(16));
+  }
+
+  /**
+   * Return i8 structure with DecimalString
+   */
+  toInt16DecimalString() {
+    return this.felt252.toString(10);
+  }
+
+  /**
+   * Return api requests representation witch is felt
+   */
+  toApiRequest() {
+    if (this.felt252 > 0) {
+      return CairoFelt(this.felt252);
+    }
+    return this.felt252.toString();
+  }
+}
diff --git a/src/utils/cairoDataTypes/int8.ts b/src/utils/cairoDataTypes/int8.ts
new file mode 100644
index 000000000..187e45d43
--- /dev/null
+++ b/src/utils/cairoDataTypes/int8.ts
@@ -0,0 +1,107 @@
+/* eslint-disable no-bitwise */
+/**
+ * Singular class handling cairo i8 data type
+ */
+
+import { BigNumberish } from '../../types';
+import { addHexPrefix } from '../encode';
+import { CairoFelt } from './felt';
+
+export const P: bigint = 2n ** 251n + 17n * 2n ** 192n + 1n;
+export const INT_8_MAX = (1n << 7n) - 1n;
+export const INT_8_MIN = -(1n << 7n) + 1n;
+export const MIN_252_BITS = P + INT_8_MIN;
+export const MAX_252_BITS = P;
+
+export class Cairoint8 {
+  public felt252: bigint;
+
+  static abiSelector = 'core::integer::i8';
+
+  /**
+   * Default constructor (Lib usage)
+   * @param bigNumberish BigNumberish value representing i8
+   */
+
+  public constructor(int8: BigNumberish) {
+    const bigInt8 = Cairoint8.validate(int8);
+
+    if (bigInt8 > 0 && bigInt8 <= INT_8_MAX) {
+      this.felt252 = bigInt8;
+    } else {
+      this.felt252 = P + bigInt8;
+    }
+  }
+
+  /**
+   * Validate if BigNumberish can be represented as i8
+   */
+  static validate(bigNumberish: BigNumberish) {
+    const bigInt = BigInt(bigNumberish);
+    if (bigInt < INT_8_MIN) throw Error('bigNumberish is smaller than INT_8_MIN');
+    if (bigInt > INT_8_MAX) throw new Error('bigNumberish is bigger than INT_8_MAX');
+    return bigInt;
+  }
+
+  static validate252Bits(bigNumberish: BigNumberish) {
+    const bigInt = BigInt(bigNumberish);
+    if (bigInt > MAX_252_BITS) throw new Error('bigNumberish is bigger than MAX_252_BITS');
+    if (bigInt < MIN_252_BITS) throw new Error('bigNumberish is smaller than MIN_252_BITS');
+    return bigInt;
+  }
+
+  /**
+   * Check if BigNumberish can be represented as i8
+   */
+  static is(bigNumberish: BigNumberish) {
+    try {
+      Cairoint8.validate(bigNumberish);
+    } catch (error) {
+      return false;
+    }
+    return true;
+  }
+
+  /**
+   * Check if provided abi type is this data type
+   */
+  static isAbiType(abiType: string) {
+    return abiType === Cairoint8.abiSelector;
+  }
+
+  static negativeFelt252ToBigInt(bigNumberish: BigNumberish) {
+    const bigInt = this.validate252Bits(bigNumberish);
+    return BigInt(bigInt - P);
+  }
+
+  /**
+   * Return bigint representation
+   */
+  toBigInt() {
+    return this.felt252;
+  }
+
+  /**
+   * Return i8 structure with HexString
+   */
+  toInt8HexString() {
+    return addHexPrefix(this.felt252.toString(16));
+  }
+
+  /**
+   * Return i8 structure with DecimalString
+   */
+  toInt8DecimalString() {
+    return this.felt252.toString(10);
+  }
+
+  /**
+   * Return api requests representation witch is felt
+   */
+  toApiRequest() {
+    if (this.felt252 > 0) {
+      return CairoFelt(this.felt252);
+    }
+    return this.felt252.toString();
+  }
+}