> For the complete documentation index, see [llms.txt](https://docs.barte.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.barte.com/banking/api/authentication.md).

# Autenticação

A API utiliza autenticação em duas camadas para máxima segurança:

1. **mTLS (Mutual TLS)**: Certificado digital do parceiro
2. **Bearer Token**: Token JWT obtido via OAuth 2.0

## Credenciais

Durante o processo de onboarding, a Barte fornece:

| Credencial       | Descrição                               |
| ---------------- | --------------------------------------- |
| `client_id`      | Identificador único do parceiro         |
| `client_secret`  | Chave secreta para autenticação         |
| Certificado mTLS | Arquivo `.pem` para autenticação mútua  |
| Chave privada    | Arquivo `.key` associado ao certificado |

> **Segurança**: Essas credenciais são confidenciais. Armazene-as de forma segura e nunca as exponha em código-fonte ou logs.

## Sign-in

Para obter o token de acesso, faça uma requisição OAuth 2.0 Client Credentials:

**Endpoints:**

| Ambiente | URL                                                |
| -------- | -------------------------------------------------- |
| Sandbox  | `https://sandbox-api-banking.barte.com/auth/token` |
| Produção | `https://api-banking.barte.com/auth/token`         |

**Request:**

```bash
curl --request POST \
  --url 'https://sandbox-api-banking.barte.com/auth/token' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data-urlencode 'grant_type=client_credentials' \
  --data-urlencode 'client_id=SEU_CLIENT_ID' \
  --data-urlencode 'client_secret=SEU_CLIENT_SECRET'
```

**Response - 200 OK:**

```json
{
  "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9...",
  "expires_in": 1800,
  "refresh_expires_in": 0,
  "token_type": "Bearer",
  "not-before-policy": 0,
  "scope": "email profile"
}
```

| Campo          | Tipo    | Descrição                      |
| -------------- | ------- | ------------------------------ |
| `access_token` | String  | Token JWT para autenticação    |
| `expires_in`   | Integer | Tempo de expiração em segundos |
| `token_type`   | String  | Tipo do token (`Bearer`)       |

**Response - 401 Unauthorized:**

```json
{
    "error": "unauthorized_client",
    "error_description": "Invalid client or Invalid client credentials"
}
```


---

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