> For a complete page index of the Captain API documentation, fetch https://docs.captain.dev/llms.txt?excludeSpec=true

# Copy & Environment Tools in MCP

* **MCP gains `captain_copy_collection` and `captain_change_environment`**: clone a collection, or move one between environments, from any MCP client. API keys are environment-scoped, so a moved collection leaves the old environment's keys behind. See [MCP Server](/guides/mcp).

Same day: [Document Metadata Endpoints](/changelog/2026-08-19-document-metadata-endpoints), [Image Dimension Limits](/changelog/2026-08-19-image-dimension-limits), [Neighboring Chunks](/changelog/2026-08-19-neighboring-chunks), [Page-Level Retrieval](/changelog/2026-08-19-page-level-retrieval)