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Snapchat APIError E3002

Snapchat API Error E3002 — Unauthorized: Invalid Credentials

Snapchat Marketing API error E3002 means your OAuth token is invalid or expired. Learn how to re-authenticate and generate a valid Snapchat access token.

Quick Answer

Snapchat Marketing API error E3002 means the OAuth access token is invalid, expired, or has been revoked. Snapchat access tokens expire after 30 minutes. Fix: use the refresh_token to obtain a new access token, or re-run the OAuth authorization flow if the refresh token has also expired.

What Causes Snapchat Error E3002?

Snapchat Marketing API uses OAuth 2.0 with short-lived access tokens (30-minute expiry) and long-lived refresh tokens. Unlike Meta, Snapchat tokens expire quickly — requiring automatic token refresh logic. Error E3002 fires whenever the access token has expired or is invalid.

  • 1Access token expired (Snapchat tokens expire after 30 minutes)
  • 2Refresh token expired (refresh tokens have a longer but finite lifespan)
  • 3User revoked app access in their Snapchat account settings
  • 4Token was generated with different OAuth credentials

How to Fix Snapchat Error E3002

  1. 1Implement automatic token refresh: when you receive E3002, immediately try refreshing using the stored refresh_token.
  2. 2Call POST /v1/oauth2/token with grant_type=refresh_token and your refresh_token.
  3. 3Store the new access_token and its expiry time (current time + 1800 seconds).
  4. 4Retry the failed API call with the new token.
  5. 5If the refresh token is also expired: redirect the user to re-authorize via Snapchat Login.
  6. 6Set up proactive token refresh: refresh 5 minutes before expiry rather than waiting for E3002.

Official Snapchat Documentation

https://marketingapi.snapchat.com/docs/#authentication

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Other Snapchat API Errors

E3003

Forbidden: Insufficient Permissions

Snapchat Marketing API error E3003 means the token has valid credentials but lacks permission for the requested operation. Learn how to request the correct OAuth scopes.

E4002

Invalid Parameter

Snapchat Marketing API error E4002 means a parameter in your request is invalid. Learn how to debug and fix malformed Snapchat API requests.

← All API Error Guides