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Limits & What's Not Supported Yet

What can't the MCP do?​

  • Write operations not supported: Can only create object drafts that still need to be manually saved.
  • No Fullstory account administration: No user management, billing, or settings changes.
  • Subset of product features: Not all Fullstory product features are available in MCP. The current focus is on metrics, segments, and session replay.
  • Multi-org / Umbrella accounts: Each MCP server instance is scoped to a single Fullstory org. Auth tokens and API keys are org-level; cross-org querying is not supported. If you manage multiple orgs, you need a separate server connection for each.
  • Dimensionality limits: Dimensionality queries (or group by) are limited to 50, which means tables will be capped at 50 rows. This makes the MCP unsuitable for bulk data exports such as large user ID lists.
  • Number of sessions: Tools that get sessions default to 10 and have a hard limit of 50 sessions.

We are expanding capabilities with each release. If something you need is missing, submit your feedback to the Slack community.