upload_file_start — flask MCP Tool Mutating

upload_file_start (upload file start) is one of 17 tools on the flask MCP server. Connect the server and your client discovers it on the handshake.

by client

How to call upload_file_start from your client

Claude Code flask upload_file_start run in your project directory
Claude Desktop flask upload_file_start ~/Library/Application Support/Claude/claude_desktop_config.json
Cursor flask upload_file_start ~/.cursor/mcp.json
VS Code flask upload_file_start .vscode/mcp.json
Zed flask upload_file_start ~/.config/zed/settings.json
Windsurf flask upload_file_start ~/.codeium/windsurf/mcp_config.json
Cline flask upload_file_start ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
Gemini CLI flask upload_file_start ~/.gemini/settings.json
Grok flask upload_file_start .mcp.json (in your project root)
ChatGPT flask upload_file_start Settings → Connectors → Advanced → Developer mode
Claude.ai flask upload_file_start Settings → Connectors → Add custom connector
LangChain flask upload_file_start pip install langchain-mcp-adapters

Fastest route

claude mcp add --transport http flask https://api.flask.do/api/mcp/mcp

Other tools on this server

contents
feedback_list
feedback_get
wait_for_feedback
feedback_post
feedback_update
get_annotated_frames
get_frame
asset_status
permission_get
search
recent_activity
tags
upload_video
upload_file_complete
feedback_stats

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

flask MCP server