I migrated from API v3 but my calls return errors

Key v3 to v4 migration changes:

1. Base URL: /api3 → /api4

2. All endpoints now require a version suffix (/v1 or /v2)

3. Response structure changed — parse { config: {}, data: [] } instead of the flat v3 format

4. Some parameter names changed (e.g. symbol → topic in many endpoints)

Helpful links

• Full v4 endpoint reference

• Topic endpoint docs

• Authentication setup