Skip to main content
Glama
BenDaSpur

openrct2-mcp

by BenDaSpur
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

OpenRCT2 MCP AI Park Control

Tests

Bridge a running OpenRCT2 game to Cursor (or any MCP client) so AI agents can read park state, optimize parks, and build roller coasters.

Quick links: License · Issues · Third-party notices

Prerequisites

  • OpenRCT2 0.5.x with RCT2 game files installed

  • Python 3.11+

  • Node.js 18+ (plugin packaging only)

This repo was tested against OpenRCT2 v0.5.1 on macOS.

Related MCP server: Bitburner MCP Server

Quick setup

# 1. Install Python deps + openrct2-bridge plugin
chmod +x scripts/*.sh
./scripts/install-bridge.sh

# 2. Install ride-builder coaster plugin
./scripts/build-plugins.sh

# 3. Launch OpenRCT2, load a park save
#    Check the in-game console for:
#      - Bridge port (starts at 20020)
#      - Ride-builder port (starts at 20021)

# 4. Verify connections (with OpenRCT2 running and a park loaded)
./scripts/check-connection.sh

# Optional: automated headless smoke test
.venv/bin/python scripts/verify-e2e.py

Cursor MCP

Project MCP config lives at .cursor/mcp.json (portable template: .cursor/mcp.json.example). Paths use ${workspaceFolder} and set PYTHONPATH to mcp-server/ so python -m openrct2_mcp resolves without a global install. Copy or adapt the example if your editor does not expand ${workspaceFolder}.

Reload MCP servers in Cursor after OpenRCT2 is running with a loaded park.

Note: End-to-end tools (live park mutations, vision capture, coaster placement) require a running OpenRCT2 instance with plugins loaded. CI runs offline unit tests only.

Example prompts:

  • "Use openrct2_status, then get_park_overview and suggest three improvements."

  • "List rides sorted by excitement and close the worst performer."

  • "Build a small wooden coaster: coaster_create, then loop coaster_get_valid_pieces / coaster_place_piece until the circuit completes."

Architecture

Cursor AI  --MCP-->  Python MCP server  --TCP-->  openrct2-bridge (park ops)
                                              `--TCP-->  ride-builder (coasters)

Component

Role

openrct2-bridge

82 game actions, 77 state queries via pyrct2

ride-builder.js

Coaster-specific TCP API (valid pieces, place track, test ratings)

mcp-server/openrct2_mcp

Curated MCP tools wrapping both plugins

MCP tools

Park optimization

Tool

Description

openrct2_status

Connection health for bridge + ride-builder

get_park_overview

Rating, guests, cash, scenario objective

list_rides

All rides with ratings and profit (fast per-ride queries)

get_ride

One ride by id

get_park_messages

Complaints and awards

get_guest

One guest by entity id

list_guests

Guest count by default; full_scan=true for samples (slow)

place_flat_ride

Place flat rides (e.g. gentle.MERRY_GO_ROUND)

place_stall

Place stalls (e.g. stall.DRINKS_STALL)

manage_paths

Paths, queues, benches, bins

manage_staff

Hire staff, list, set patrol/orders (by staff_id)

list_staff_tool / set_staff_patrol_tool

Per-staff patrol management

assign_staff_to_path_corridor_tool

Patrol box covering path tiles

optimize_staff_coverage_tool

Hire + assign staff along main paths

park_health_report_tool

Complaints, low satisfaction, recommendations

get_map_bounds_tool / get_map_region_tool

Park-scale spatial grids

get_path_graph_tool / find_buildable_loop_tool

Path graph and build surveys

apply_theme_preset_tool

Theme along paths (see themes/cute.json)

place_small_scenery_tool / paint_terrain_tool

Decoration and terrain

set_ride_price / open_ride / close_ride

Ride operations

list_refurbish_candidates_tool

Rank rides needing refurbish by downtime and reliability (Maintenance tab metrics)

refurbish_ride_tool

Renew a ride (resets age/reliability; closes and waits for guests by default)

set_park_settings

Entrance fee, open/close park

advance_time

Step simulation ticks

get_research

Research state

Coaster building

Tool

Description

coaster_create

Start a new coaster shell

coaster_get_valid_pieces

Legal next track pieces

coaster_place_piece

Place validated track (z_is_train_entry for endpoint Z)

coaster_place_next_piece

Place next piece from valid endpoint (Z-safe)

coaster_build_perimeter

Build flexible perimeter loop along guide ring (detours around obstacles)

coaster_obstacle_map_tool

Perimeter obstacle heatmap (paths, track, scenery, slopes, unowned ring stats)

coaster_plan_route_tool

Dry-run simulate route (probe+undo, no permanent build)

coaster_plan_ahead_tool

Beam search 2–4 pieces ahead

coaster_prepare_corridor_tool

Buy/clear/flatten along guide corridor (dry_run default)

coaster_track_context_tool / coaster_full_track_context_tool

Endpoint context with height + collisions

get_tile_height_tool / coaster_site_survey_tool

Ground tile_z, slope, flat build sites near x,y

coaster_height_context_tool / coaster_probe_piece_tool

Z vs ground; per-piece collision probe

coaster_start_track_tool

Create coaster + BeginStation at surveyed tile

coaster_rank_next_pieces_tool

Rank pieces by clearance, height fit, and collisions

coaster_undo

Remove last piece

coaster_finish_station

Place entrance/exit

coaster_test

Test ride and return ratings

coaster_stats

Current excitement/intensity/nausea

coaster_delete

Demolish coaster

list_loaded_ride_objects

Valid ride object indices

Coaster workflow

  1. list_loaded_ride_objects — pick a valid ride_object index

  2. coaster_site_survey_tool(x, y) — find flat tile_z and nearby obstacles

  3. coaster_start_track_tool(x, y) or coaster_create + manual station placement

  4. Loop: coaster_rank_next_pieces_tool or coaster_probe_piece_tool → coaster_place_next_piece

  5. When circuit completes: coaster_finish_station → coaster_test

Use get_tile_height_tool for a single tile; coaster_height_context_tool for endpoint Z vs ground.

Perimeter coaster workflow

  1. coaster_obstacle_map_tool(inset=18) — survey ring clearance and unowned tiles on the guide ring

  2. coaster_plan_route_tool(inset=18) — simulate trace without building

  3. Optional: coaster_prepare_corridor_tool(dry_run=true) then apply with confirm_destructive=true

  4. coaster_build_perimeter(dry_run=true) → coaster_build_perimeter — execute build

Terminal debug (no MCP): .venv/bin/python scripts/plan-coaster-route.py --simulate --inset 18

Vision (screenshots + spatial context)

The MCP server can see the park window while also returning structured map data.

Tool

What it does

capture_game_view

Screenshot of the OpenRCT2 window (returned as an MCP image)

inspect_area_at_tile

ASCII path/queue grid + nearby rides + optional screenshot

Recommended build loop:

  1. inspect_area_at_tile(39, 44) — Triple Corkscrew entrance area (example)

  2. Plan paths / queue / ride placement from ASCII map + screenshot

  3. Apply changes via manage_paths, place_stall, coaster_*, etc.

  4. capture_game_view — verify visually

macOS setup: System Settings → Privacy & Security → Screen Recording → enable Cursor (and Terminal if testing from CLI). Without this, tools fall back to text-only context.

Set OPENRCT2_VISION_MAX_WIDTH=1280 (default) to limit screenshot size.

Agent skill

See skills/openrct2-park-director/SKILL.md for orchestration workflows (perimeter coasters, cute themes, staff patrol).

Reload ride-builder after updates: ./scripts/build-plugins.sh then restart OpenRCT2 (plugin loads at launch).

Ride operations (P6)

Tool

Description

set_ride_inspection_interval_tool

Inspection every 10–120 minutes

set_ride_mode_tool / set_num_trains_tool / set_cars_per_train_tool

Throughput tuning

optimize_ride_throughput_tool

Composite fix for struggling rides (dry_run supported)

demolish_ride_tool

Demolish any ride (confirm_destructive=true)

manage_paths

Now supports remove_tile and remove_line

Land, finance, guests (P7–P9)

Tool

Description

find_open_land_tool / terraform_region_tool / buy_land_tool / clear_area_tool

Land survey and terraforming

get_finance_summary_tool / optimize_park_pricing_tool / start_marketing_campaign_tool

Business loop

fund_research_tool / scenario_progress_tool

Research and objectives

get_complaint_hotspots_tool / guest_flow_summary_tool

Guest intelligence

Advanced building and safety (P10–P11)

Tool

Description

coaster_build_along_path_tool / import_track_design_tool

Path-following coasters, clipboard designs

place_ride_at_best_tile_tool / extend_queue_tool

Smart placement

pre_change_snapshot_tool / get_action_log_tool

Safety checkpoints and action journal

Destructive tools

Require confirm_destructive=true; composites support dry_run=true

Performance

Large parks (1000+ guests, many rides) make bulk bridge queries slow or prone to timeout.

The MCP server avoids the worst patterns:

Slow (avoid)

Fast (used instead)

rides (all at once)

listAllRides + rides?id=N per ride

guests (all peeps)

park.guests count + get_guest(id)

game.state.park() for overview

Scalar park.name, park.rating, park.cash, …

Tile-by-tile map scans

Not exposed via MCP (too many round-trips)

Footpath scan (fill benches/bins)

get_elements_by_type("footpath") bulk first; tile chunk fallback

list_guests defaults to guest count only. Pass full_scan=true only if you accept a long wait.

Reload the MCP server after pulling performance updates.

Configuration

Environment variables (set in .cursor/mcp.json):

Variable

Default

Purpose

OPENRCT2_BRIDGE_PORT

20020

Bridge plugin TCP port

OPENRCT2_RIDE_BUILDER_PORT

20021

Ride-builder TCP port

OPENRCT2_BRIDGE_TIMEOUT

30

Per-request bridge timeout (seconds)

OPENRCT2_RIDE_BUILDER_TIMEOUT

15

Per-request ride-builder timeout (seconds)

OpenRCT2 config.ini recommendations:

  • macOS: ~/Library/Application Support/OpenRCT2/config.ini

  • Linux: ~/.config/OpenRCT2/config.ini

Override the user data directory with OPENRCT2_USER_PATH (used by install-bridge.sh).

[plugin]
enable_hot_reloading = true

install-bridge.sh enables hot reloading automatically.

Contributing

  1. ./scripts/install-bridge.sh — Python venv, bridge plugin, hot reload

  2. ./scripts/build-plugins.sh — ride-builder plugin

  3. pytest mcp-server/tests -q — offline unit tests (no OpenRCT2 required)

  4. .venv/bin/python scripts/verify-e2e.py — optional smoke test with OpenRCT2 running

Development

# Run MCP server manually
export PYTHONPATH=mcp-server
.venv/bin/python -m openrct2_mcp

# Rebuild ride-builder after edits
./scripts/build-plugins.sh
# Reload plugin in-game (hot reload) or restart OpenRCT2

Safety notes

  • Building tools pause the game before mutations.

  • build_in_pause_mode cheat is enabled on connect for automation.

  • Coaster tools require the ride-builder plugin; park tools require openrct2-bridge.

License

MIT. See NOTICE for third-party attribution. Ride-builder plugin derived from openrct2-ridecreation-api.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityStale
ResponsivenessNo issues

Resources

Related MCP Connectors

Related MCP Servers

  • Unity-MCP

    TSavo
    A
    license
    B
    quality
    C
    maintenance
    A bridge between Unity and AI assistants that enables AI to interact with Unity game environments through a standardized interface for code execution, scene analysis, and runtime debugging.
    3
    34 npm
    7
    MIT

  • Bitburner MCP Server

    JoshuaGreeff
    F
    license
    Not graded
    quality
    D
    maintenance
    A bridge for the Bitburner Remote API that enables AI models to interact with the game through file management and remote method tools. It supports stdio and HTTP transports, featuring a local dashboard for monitoring connection status and events.
    -