@@ -0,0 +1,60 @@
+import app from '@/app';
+
+import BaseError from '@/errors/BaseError';
+import InternalError from '@/errors/InternalError';
+import BadRequestError from '@/errors/BadRequestError';
+
+import { cpfIsValid, getCpfRegionAndUfs, formatCpf } from '@/services/cpf/cpf';
+
+async function regionOfCpf(request, response, next) {
+  try {
+    const requestedCpf = request.query.cpf.replace(/[-.]/g, '');
+    const formatedCpf = formatCpf(requestedCpf);
+
+    if (!/^[0-9]+$/.test(requestedCpf)) {
+      throw new BadRequestError({
+        message: `CPF ${formatedCpf} inválido.`,
+        type: 'BadRequestError',
+        name: 'bad_request',
+      });
+    }
+
+    if (requestedCpf.length !== 11) {
+      throw new BadRequestError({
+        message: `CPF ${formatedCpf} inválido.`,
+        type: 'bad_request',
+        name: 'BadRequestError',
+      });
+    }
+
+    if (!cpfIsValid(requestedCpf)) {
+      response.status(200);
+      return response.json({
+        isValid: false,
+      });
+    }
+
+    const cpfRegionAndUfs = getCpfRegionAndUfs(requestedCpf);
+
+    response.status(200);
+    return response.json({
+      cpf: formatedCpf,
+      isValid: true,
+      rf: cpfRegionAndUfs.regionNumber,
+      ufs: cpfRegionAndUfs.ufs,
+    });
+  } catch (error) {
+    if (error instanceof BaseError) {
+      console.log(error);
+      return next(error);
+    }
+
+    console.log(error);
+    throw new InternalError({
+      message: 'Todos os serviços de CPF retornaram erro.',
+      type: 'service_error',
+    });
+  }
+}
+
+export default app().get(regionOfCpf);
@@ -0,0 +1,86 @@
+{
+    "tags": [
+        {
+            "name": "CPF",
+            "description": "Informações referentes a CPFs"
+        }
+    ],
+    
+    "paths": {
+        "/cpf/v1/{cpf}": {
+            "get": {
+                "tags": ["CPF"],
+                "summary": "Verifica o CPF e caso válido retorna sua região",
+                "description": "",
+                "parameters": [
+                    {
+                        "name": "CPF",
+                        "description": "O CPF (Cadastro de Pessoas Físicas) é um sistema de códigos de registro de contribuintes mantido pela Receita Federal que representa unicamente uma pessoa física no Brasil.\n",
+                        "in": "path",
+                        "required": false,
+                        "schema": {
+                            "type": "string",
+                            "format": "string"
+                        }
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "Success",
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "$ref": "#/components/schemas/CPFInfo"
+                                }
+                            }
+                        }
+                    },
+                    "400": {
+                        "description": "CPF em um padrão inválido",
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "$ref": "#/components/schemas/ErrorMessage"
+                                },
+                                "example": {
+                                    "name": "BadRequestError",
+                                    "message": "CPF 10723555072 inválido.",
+                                    "type": "bad_request"
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }        
+    },
+    "components": {
+        "schemas": {
+            "CPFInfo": {
+                "title": "CPF",
+                "required": ["cpf", "isValid", "rf", "ufs"],
+                "type": "object",
+                "properties": {
+                    "cpf": {
+                        "type": "string"
+                    },
+                    "isValid": {
+                        "type": "boolean"
+                    },
+                    "rf": {
+                        "type": "integer"
+                    },
+                    "ufs": {
+                        "type": "object"
+                    }
+                },
+                "example": {
+                    "cpf": "10723555079",
+                    "isValid": true,
+                    "rf": 0,
+                    "ufs": ["RS"]
+                }
+            }
+        }
+    }
+}
@@ -26,6 +26,7 @@ const getDocs = () => {
     'PIX',
     'CAMBIO',
     'TICKERS',
+    'CPF',
   ];
 };
 
 
@@ -0,0 +1,69 @@
+export const formatCpf = (cpf) => {
+  return cpf.replace(/(\d{3})(\d{3})(\d{3})(\d{2})/, '$1.$2.$3-$4');
+};
+
+export const cpfIsValid = (cpf) => {
+  const arr = cpf.split('');
+  if (arr.every((digit) => digit === arr[0])) return false;
+  let add = 0;
+  let rev = 0;
+  for (let i = 0; i < 9; i += 1) add += parseInt(cpf.charAt(i), 10) * (10 - i);
+  rev = 11 - (add % 11);
+  if (rev === 10 || rev === 11) rev = 0;
+  if (rev !== parseInt(cpf.charAt(9), 10)) return false;
+
+  add = 0;
+  for (let i = 0; i < 10; i += 1) add += parseInt(cpf.charAt(i), 10) * (11 - i);
+  rev = 11 - (add % 11);
+  if (rev === 10 || rev === 11) rev = 0;
+  if (rev !== parseInt(cpf.charAt(10), 10)) return false;
+  return true;
+};
+
+export const getCpfRegionAndUfs = (requestedCpf) => {
+  const cpfDigit = Number(requestedCpf[8]);
+
+  const regionsAndufs = [
+    {
+      regionNumber: 0,
+      ufs: ['RS'],
+    },
+    {
+      regionNumber: 1,
+      ufs: ['DF', 'GO', 'MT', 'MS', 'TO'],
+    },
+    {
+      regionNumber: 2,
+      ufs: ['AC', 'AP', 'AM', 'PA', 'RO', 'RR'],
+    },
+    {
+      regionNumber: 3,
+      ufs: ['CE', 'MA', 'PI'],
+    },
+    {
+      regionNumber: 4,
+      ufs: ['AL', 'PB', 'PE', 'RN'],
+    },
+    {
+      regionNumber: 5,
+      ufs: ['BA', 'SE'],
+    },
+    {
+      regionNumber: 6,
+      ufs: ['MG'],
+    },
+    {
+      regionNumber: 7,
+      ufs: ['ES', 'RJ'],
+    },
+    {
+      regionNumber: 8,
+      ufs: ['SP'],
+    },
+    {
+      regionNumber: 9,
+      ufs: ['PR', 'SC'],
+    },
+  ];
+  return regionsAndufs[cpfDigit];
+};
@@ -0,0 +1,69 @@
+import { beforeAll, describe, expect, test } from 'vitest';
+
+import axios from 'axios';
+
+let requestUrl = '';
+
+beforeAll(async () => {
+  requestUrl = `${global.SERVER_URL}/api/cpf/v1`;
+});
+
+describe('api/cpf/v1 (E2E)', () => {
+  test('Utilizando um CPF válido: 54083180013', async () => {
+    const response = await axios.get(`${requestUrl}/54083180013`);
+    const { data, status } = response;
+
+    expect(status).toEqual(200);
+    expect(data.cpf).toEqual('540.831.800-13');
+    expect(data.rf).toEqual(0);
+    expect(data.ufs).toEqual(['RS']);
+    expect(data.isValid).toEqual(true);
+  });
+
+  test('Utilizando um CPF válido com formatação: 540.831.800-13', async () => {
+    try {
+      await axios.get(`${requestUrl}/540.831.800-13`);
+    } catch (error) {
+      const { response } = error;
+      const { data, status } = response;
+
+      expect(status).toEqual(200);
+      expect(data.cpf).toEqual('540.831.800-13');
+      expect(data.rf).toEqual(0);
+      expect(data.ufs).toEqual(['RS']);
+      expect(data.isValid).toEqual(true);
+    }
+  });
+
+  test('Utilizando um CPF inválido (valor): 00000000000', async () => {
+    try {
+      await axios.get(`${requestUrl}/00000000000`);
+    } catch (error) {
+      const { response } = error;
+      const { data, status } = response;
+
+      expect(status).toEqual(400);
+      expect(data).toEqual({
+        message: 'CPF 000.000.000-00 inválido.',
+        name: 'BadRequestError',
+        type: 'bad_request',
+      });
+    }
+  });
+
+  test('Utilizando um CPF inválido (tamanho): 123', async () => {
+    try {
+      await axios.get(`${requestUrl}/123`);
+    } catch (error) {
+      const { response } = error;
+      const { data, status } = response;
+
+      expect(status).toEqual(400);
+      expect(data).toEqual({
+        message: 'CPF 123 inválido.',
+        name: 'BadRequestError',
+        type: 'bad_request',
+      });
+    }
+  });
+});