SimConnect MCP
An MCP (Model Context Protocol) server that connects AI coding agents to Microsoft Flight Simulator via SimConnect. This server is built for add-on development - full read/write access to SimVars, L-vars, events, calculator code execution, and embedded documentation. Its 32 documented tools cover msfs, simvar, event, lvar. It runs locally over stdio via the published package.
People who work with msfs, simvar and event and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.
VERIFIED ACTIVE
LAST COMMIT 2026-09-02 · ★ 2 · #115 OF 229 MAINTAINED CODING AGENT · VERIFIED 2026-09-18
AGPL-3.0 · Python servers · how we verify → /methodology
01 · Install SimConnect MCP
Claude Code
claude mcp add robin24-simconnect-mcp -- uvx simconnect-mcp Claude Desktop / Cursor / VS Code - add to config
{
"mcpServers": {
"robin24-simconnect-mcp": {
"command": "uvx",
"args": [
"simconnect-mcp"
]
}
}
} Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.
Using another client? Same JSON, different key
Claude Desktop · mcpServers
Cursor · mcpServers
VS Code · servers
Windsurf · mcpServers
Zed · context_servers
Cline · mcpServers
Roo Code · mcpServers
Continue · mcpServers
LibreChat · mcpServers
Gemini CLI · mcpServers
Codex CLI · mcp_servers
Full setup guides: every client.
02 · Evidence
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
runs as local process (stdio) - runs on your machine with your user's permissions
license AGPL-3.0 - declared in the repository
pypi package simconnect-mcp - check the name against the project README before installing (PyPI has no namespace ownership)
registry namespace io.github.robin24 is GitHub-verified and matches the repo owner
03 · What SimConnect MCP can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
What you can build
With this server connected, an agent can close the SimConnect connection to MSFS, check connection state, whether the sim is running/paused, read a SimVar value by name, in the requested unit, and write a value to a settable SimVar - fails honestly rather than reporting success on a rejected write.
The 32 tools it gives your agent
Extracted from the project's README - what SimConnect MCP lets an agent do.
- msfs_connect
- - Establish a SimConnect connection to MSFS
- msfs_disconnect
- - Close the SimConnect connection to MSFS
- msfs_get_connection_status
- - Check connection state, whether the sim is running/paused
- msfs_get_simvar
- - Read a SimVar value by name, in the requested unit
- msfs_set_simvar
- - Write a value to a settable SimVar - fails honestly rather than reporting success on a rejected write
- msfs_get_simvars_bulk
- - Read several SimVars in one call; one failing entry doesn't abort the rest
- msfs_search_simvars
- - Search the SimVar catalog by keyword
- msfs_list_simvar_categories
- - List every SimVar category with its variable count
- msfs_watch_simvar
- - Sample a SimVar over time, returning a time series for debugging
- msfs_trigger_event
- - Fire a SimConnect event, with an optional parameter
- msfs_search_events
- - Search SimConnect events by keyword, optionally filtered by category
- msfs_trigger_custom_event
- - Fire a custom event as a key event through the MobiFlight WASM module
show all 32 tools
- msfs_get_lvar
- - Read an L-var (local variable) value from the current aircraft
- msfs_set_lvar
- - Write a value to an L-var on the current aircraft
- msfs_list_lvars
- - Enumerate the L-vars the currently loaded aircraft has registered
- msfs_execute_calculator_code
- - Execute RPN calculator code in the simulator
- msfs_search_lvars
- - Search known aircraft L-vars by keyword across the bundled catalogs
- msfs_browse_lvar_catalog
- - Browse the aircraft L-var catalogs - list catalogs, the panels in one, or the variables on one panel
- msfs_get_aircraft_snapshot
- - Read a snapshot of the current aircraft state (position, speed, attitude, and key systems in one call)
- msfs_get_nearby_airports
- - List airports near a point, nearest first
- msfs_get_facility_info
- - Look up one airport, waypoint, NDB or VOR by ICAO identifier
- msfs_send_sim_text
- - Display a text overlay message in the simulator (debug feedback)
- msfs_set_aircraft_position
- - Reposition the aircraft (test scenario setup)
- msfs_get_pmdg_var
- - Read a PMDG aircraft data field by name - switches, MCP values, fuel qty, FMC data (777 or 737 NG3)
- msfs_get_pmdg_cdu
- - Read a PMDG CDU screen as text rows with per-cell color and formatting
- msfs_send_pmdg_event
- - Send a PMDG control event - toggle a switch, press a button, set a selector (777 or 737 NG3)
- msfs_search_hubhop
- - Search the MobiFlight HubHop community preset database
- msfs_list_hubhop_aircraft
- - List the aircraft that HubHop has presets for
- msfs_load_flight
- - Load a saved flight, replacing the current one
- msfs_save_flight
- - Save the current flight to a .FLT file - refuses to overwrite an existing file unless overwrite=true is passed explicitly
- msfs_load_flight_plan
- - Load a .PLN flight plan into the aircraft's GPS/FMS, replacing whatever plan is currently active
- msfs_create_ai_object
- - Spawn an AI aircraft or object at a position - reports whether SimConnect accepted the request, which is not the same as the object existing (MSFS ignores an un
04 · Who maintains SimConnect MCP
SimConnect MCP is maintained by robin24. It's the only MCP server we track from this author; the repo dates to Mar 2026.
05 · Facts
- repository
- github.com/robin24/simconnect-mcp
- category
- coding agent - ranked #115 of 229 actively-maintained coding agent servers as of 2026-09-18.
- registry
- io.github.robin24/simconnect-mcp (active, first published 2026-08-31 · 3 versions)
- packages
- pypi:simconnect-mcp
06 · SimConnect MCP FAQ
Is SimConnect MCP still maintained?
Yes - as of 2026-09-18, its last commit was 2026-09-02. We re-verify nightly.
What can SimConnect MCP do?
With this server connected, an agent can close the SimConnect connection to MSFS, check connection state, whether the sim is running/paused, read a SimVar value by name, in the requested unit, and write a value to a settable SimVar - fails honestly rather than reporting success on a rejected write.
How do I install SimConnect MCP?
Run `uvx simconnect-mcp`. You can also paste the ready-made client config above.
Does SimConnect MCP run locally?
Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.
07 · Alternatives to SimConnect MCP
Alternatives to SimConnect MCP
Maintained coding agent servers if SimConnect MCP isn't the fit.
- Serena A powerful toolkit for coding, providing semantic retrieval and editing capabilities. ★ 29,556 · 2026-09-17
- Desktop Commander MCP server for terminal commands, file operations, and process management ★ 9,633 · 2026-09-17
- Ouroboros Pins an acceptance spec; the verify command and expected output never enter the success contract. ★ 6,016 · 2026-09-15
- Socraticode MCP server for enterprise local codebase indexing, semantic search, and code dependency graphs. ★ 3,312 · 2026-09-17
- Omnara Deploy durable AI agents with Omnara, an open-source managed-agent platform. ★ 2,858 · 2026-09-18
- Docs Search and read Empryo's documentation. Read-only, no auth, no local access. ★ 1,246 · 2026-09-17
Pairs well with
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