Updates, changes, and improvements at Retool.
Refer to the stable and edge release notes for detailed information about self-hosted releases.
You can now select the Python version used by a workflow from the Languages & Libraries tab. Click ... next to Python, select Update version, and choose between Python 3.10 and 3.14.
Python 3.14 does not include built-in libraries. When you upgrade, Retool automatically identifies any built-in libraries your workflow uses and installs them as custom libraries.
Retool now supports an MCP server, which enables you to interact with your Retool organization from your chosen agentic environment.
Retool's MCP server currently supports tools that help you manage your organization and its users. For example, you can use the MCP for the following use cases:
Refer to the tool reference for the full list.
Retool is actively adding additional tools that expand the capabilities of the MCP server to include additional Retool functionality, including app building.
Python 3.10 will reach end of life on October 31, 2026. After this date, Retool will no longer support Python 3.10 in Workflows.
New and existing workflows on Python 3.10 will continue to run but they will not be supported. They will not be automatically migrated to a newer version.
Python 3.14 is rolling out to cloud instances and will be available in an upcoming self-hosted release.
When you upgrade, Retool automatically identifies built-in libraries your workflow uses and installs them as custom libraries. Python 3.14 is mostly backwards-compatible, but Retool recommends publishing a workflow release before upgrading so you can revert if needed.
See Configure Python version for full details on how to upgrade and revert to a previously published release.
| Date | Event |
|---|---|
| April 2026 | Python 3.14 available |
| October 31, 2026 | Python 3.10 End-of-Life (EOL); support removed from Retool Workflows |
The following patches are now available on the Stable release channel:
Update your Retool instance to apply the latest bug fixes and security patches.
Retool 3.375 is now available on the Edge release channel for self-hosted organizations.
The following patches are now available on the Stable release channel:
Update your Retool instance to apply the latest bug fixes and security patches.
Retool 3.371 is now available on the Edge release channel for self-hosted organizations.
You can now delete workflows programmatically using the DELETE /api/v2/workflows/{workflowId} endpoint in the Retool REST API.
To use this endpoint, your API token must have the workflows:write scope. The endpoint only supports deleting standard workflows—deleting agents and functions via the API is not supported.
Refer to the Retool API reference for full endpoint details, including request parameters and error responses.
Retool now provides a native integration for CockroachDB, a relational database management system. You can create a CockroachDB resource to securely connect to your databases and create apps and automations that use SQL queries to perform create, read, update, and delete operations.
To enable the CockroachDB integration in Retool, navigate to Beta > Settings and turn on CockroachDB connector.
The following patches are now available on the Stable release channel:
Update your Retool instance to apply the latest bug fixes and security patches.