Authentication issues
401 Unauthorized
Symptom: All requests return 401 status. Common causes:- Missing
Authorizationheader - Typo in token (extra spaces, newlines)
- Expired or revoked token
- Missing
Bearerprefix
- Print your token (first/last 4 chars only) to verify it’s loaded
- Try the token in cURL to isolate the issue
- Generate a new token from the dashboard
403 Forbidden
Symptom: Token works for some endpoints but not others. Common causes:- Accessing a resource from another team
- Feature not available on your plan
- Attempting an admin-only action
- Verify the resource belongs to your team
- Check your plan in the dashboard
- Use a token from an admin account
Resource not found (404)
Thread not found
Symptom:THREAD_NOT_FOUND error when accessing a thread.
Common causes:
- Using platform ID instead of Inbox ID
- Thread was deleted
- Typo in thread ID
Prospect not found
Symptom:PROSPECT_NOT_FOUND when sending a message or looking up.
Common causes:
- Prospect has never interacted with your team
- Wrong platform ID format
- Prospect was deleted
Prospects are auto-created when they message you or when you create a thread with them. You cannot create prospects directly.
Account link not found
Symptom:ACCOUNT_LINK_NOT_FOUND when sending messages.
Common causes:
- Using platform ID instead of Inbox ID
- Account was disconnected
- Typo in account link ID
Rate limiting
429 Too many requests
Symptom: Requests start failing with 429 after sending many messages. Solutions:Pagination issues
Missing data
Symptom: Not all threads/messages are returned. Cause: Not handling pagination properly. Solution:Invalid cursor
Symptom:INVALID_CURSOR error when paginating.
Common causes:
- Cursor was modified
- Cursor from a different query
- Cursor format is wrong
- Use cursors exactly as returned (don’t modify)
- Start fresh if cursor errors persist
- Check cursor parameter names
Message sending issues
Message not delivered
Symptom: API returns success but message doesn’t appear on X. Possible causes:- Platform-level restrictions on your X account
- Recipient has blocked you
- Temporary platform issues
- Check the thread in the Inbox dashboard
- Verify the message appears there
- Try sending from the X app directly
- Contact support if the issue persists
Empty message error
Symptom:VALIDATION_ERROR when sending a message.
Solution:
Filter issues
Filters not working
Symptom: Filters return unexpected results. Common causes:- Wrong parameter format
- Incorrect filter combination
Data sync issues
Stale prospect data
Symptom: Prospect profile data (followers, bio) seems outdated. Explanation: Prospect profile data is synced periodically from the platform, not in real-time. Solutions:- Profile data updates on each interaction
- For critical decisions, fetch directly from X API
- Don’t rely on real-time accuracy for follower counts
Missing threads
Symptom: Conversations visible in Inbox UI don’t appear in API. Possible causes:- Pagination not complete
- Filtering out results
- Different inbox views
Quick diagnostic script
Run this to verify your setup:Getting help
If you’re still stuck:- Check the error code in the Error Codes reference
- Review the API reference for the specific endpoint
- Contact support at helpcenter.inboxapp.com
- Email kevin@inboxapp.com for urgent issues
- Error message and code
- Request endpoint and parameters
- Timestamp of the issue
- Your team ID (from
/teamresponse)
Related
Error codes
Complete error reference
Rate limits
Rate limiting details
FAQ
Common questions
Authentication
Auth setup guide