OAuth 2.0 Configuration

Complete guide to OAuth setup, security best practices, and troubleshooting common issues

What is OAuth 2.0?

OAuth 2.0 is the industry-standard protocol for secure API authorization

Key Benefits

• Secure delegated access without sharing passwords
• Granular permission control (scopes)
• Token-based authentication
• Industry standard with broad support
• Built-in security features (PKCE, state validation)

Core Components

• Client ID: Public identifier for your app
• Client Secret: Private key for secure communication
• Access Token: Short-lived credential for API access
• Refresh Token: Long-lived credential for token renewal
• Scopes: Specific permissions being requested

OAuth 2.0 Authorization Flow

Authorization Request

User clicks "Connect" and is redirected to provider

GET https://provider.com/oauth/authorize?
  client_id=YOUR_CLIENT_ID
  &redirect_uri=https://yourapp.com/callback
  &scope=read+write
  &response_type=code
  &state=csrf_token

User Authorization

User reviews permissions and grants access

Provider shows permission dialog and user approves

Authorization Code

Provider redirects back with authorization code

GET https://yourapp.com/callback?
  code=authorization_code
  &state=csrf_token

Token Exchange

Exchange code for access and refresh tokens

POST https://provider.com/oauth/token
{
  "grant_type": "authorization_code",
  "code": "authorization_code",
  "redirect_uri": "https://yourapp.com/callback",
  "client_id": "YOUR_CLIENT_ID",
  "client_secret": "YOUR_CLIENT_SECRET"
}

Token Storage

Securely store tokens with encryption

Access tokens expire, refresh tokens persist

Common Issues & Solutions

`redirect_uri_mismatch`

Critical

Cause: Callback URL not registered in OAuth app

Solution: Add exact redirect URI to OAuth app settings

`invalid_client`

Critical

Cause: Client ID or secret is incorrect

Solution: Verify credentials in OAuth app settings

`access_denied`

User Action

Cause: User denied permissions or cancelled

Solution: User needs to retry and approve permissions

`invalid_scope`

Configuration

Cause: Requested permissions not allowed

Solution: Check scope configuration in OAuth app

`token_expired`

Normal

Cause: Access token has expired

Solution: Use refresh token to get new access token

Security Best Practices

Secure Token Storage

Never store tokens in plain text or client-side storage

Encrypt tokens at rest using AES-256
Use secure key management (KMS/Vault)
Rotate encryption keys regularly
Limit token access to necessary services

Token Lifecycle Management

Properly handle token expiration and refresh

Monitor token expiration dates
Implement automatic token refresh
Handle refresh token expiration gracefully
Notify users before token expiry

Security Best Practices

Follow OAuth 2.0 security guidelines

Use PKCE (Proof Key for Code Exchange)
Validate state parameter to prevent CSRF
Use HTTPS for all OAuth flows
Limit token scope to minimum required

Astralis OAuth Implementation

How we implement OAuth securely in our platform

Security Features

• PKCE (Proof Key for Code Exchange) support
• CSRF protection with state validation
• Automatic token refresh and rotation
• Encrypted token storage (AES-256)
• Secure key management and rotation

Integration Features

• Multi-tenant OAuth configuration
• Organization-specific credentials
• Granular scope management
• Real-time connection health monitoring
• Comprehensive error handling and recovery

Enterprise Security: All OAuth tokens are encrypted at rest and in transit. We follow OAuth 2.0 security best practices and regularly audit our implementation.

Need OAuth Help?

Having trouble with OAuth configuration or integration setup?

Integration Setup Guide OAuth 2.0 Specification Contact Support

For integration-specific OAuth setup, check our detailed integration guides.

OAuth 2.0 Authorization Flow

Authorization Request

User clicks "Connect" and is redirected to provider

GET https://provider.com/oauth/authorize?
  client_id=YOUR_CLIENT_ID
  &redirect_uri=https://yourapp.com/callback
  &scope=read+write
  &response_type=code
  &state=csrf_token

User Authorization

User reviews permissions and grants access

Provider shows permission dialog and user approves

Authorization Code

Provider redirects back with authorization code

GET https://yourapp.com/callback?
  code=authorization_code
  &state=csrf_token

Token Exchange

Exchange code for access and refresh tokens

POST https://provider.com/oauth/token
{
  "grant_type": "authorization_code",
  "code": "authorization_code",
  "redirect_uri": "https://yourapp.com/callback",
  "client_id": "YOUR_CLIENT_ID",
  "client_secret": "YOUR_CLIENT_SECRET"
}

Token Storage

Securely store tokens with encryption

Access tokens expire, refresh tokens persist

Common Issues & Solutions

`redirect_uri_mismatch`

Critical

Cause: Callback URL not registered in OAuth app

Solution: Add exact redirect URI to OAuth app settings

`invalid_client`

Critical

Cause: Client ID or secret is incorrect

Solution: Verify credentials in OAuth app settings

`access_denied`

User Action

Cause: User denied permissions or cancelled

Solution: User needs to retry and approve permissions

`invalid_scope`

Configuration

Cause: Requested permissions not allowed

Solution: Check scope configuration in OAuth app

`token_expired`

Normal

Cause: Access token has expired

Solution: Use refresh token to get new access token

Security Best Practices

Secure Token Storage

Never store tokens in plain text or client-side storage

Encrypt tokens at rest using AES-256
Use secure key management (KMS/Vault)
Rotate encryption keys regularly
Limit token access to necessary services

Token Lifecycle Management

Properly handle token expiration and refresh

Monitor token expiration dates
Implement automatic token refresh
Handle refresh token expiration gracefully
Notify users before token expiry

Security Best Practices

Follow OAuth 2.0 security guidelines

Use PKCE (Proof Key for Code Exchange)
Validate state parameter to prevent CSRF
Use HTTPS for all OAuth flows
Limit token scope to minimum required