MCP tool reference

The HELIX MCP server registers 124 tools. This reference is generated by starting @hypersoniclabs/[email protected] and listing its tools, so names, descriptions and argument schemas are exactly what an agent sees.

Import bridge

Detect, plan and run imports from other engines and file formats. 12 tools: bridge_detect, bridge_doctor, bridge_import, bridge_inspect, bridge_plan, bridge_plugin_create, bridge_plugin_inspect, bridge_plugin_install, bridge_plugin_remove, bridge_plugin_test, bridge_plugins_list, bridge_validate.

Vehicles

Check, simulate, preview and publish vehicles and vehicle add-ons. 11 tools: check_vehicle_addon, check_vehicle_audio, check_vehicle_cabin, check_vehicle_host, get_vehicle_reference_package, import_vehicle_audio, preview_vehicle, publish_vehicle, publish_vehicle_addon, simulate_vehicle, validate_vehicle.

Devices

Create, validate and test interactive devices. 3 tools: create_device, test_device, validate_device.

Avatars, characters and animation

Avatars, NPCs, looks, gestures, animation and locomotion packs. 17 tools: capture_gesture, capture_npc, check_avatar, create_avatar, fix_avatar_rig, generate_animation, gesture_axis_table, get_look, import_character, inspect_gesture, inspect_npc, list_cosmetic_slots, list_voices, publish_avatar_version, save_look, scaffold_locomotion_pack, validate_locomotion_pack.

Continuum and packages

Publish, pull and inspect Continuum packages and receipts. 9 tools: dry_run_continuum_canary, get_continuum_publication_receipt, get_package_manifest, install_world_packages, publish_continuum_canary, publish_continuum_package, publish_continuum_scratch_world, publish_continuum_source_map, pull_continuum_package.

Items and distribution

Search, publish, delist and distribute universal items. 23 tools: check_listed_items, create_item_distribution, delist_item, disable_item_distribution, get_asset, get_item_build, inspect_item_definition, install_asset, item_thumbnail, list_asset_versions, list_item_distributions, publish_owned_item, scaffold_item_definition, search_assets, search_items, search_vault, track_asset, update_asset_metadata, update_item_distribution, validate_item_definition, visual_qa_item, visual_qa_item_hosted, visual_qa_item_status.

Generation

Generate assets, images, audio, materials and environments. 10 tools: generate_asset, generate_audio, generate_environment_splat, generate_image, generate_material, list_materials, list_systems, poll_asset_generation, start_asset_generation, use_material.

Worlds

Scaffold, validate, publish and measure worlds, terrain, placements, achievements and products. 29 tools: analyze_scene_performance, bake_world_lighting, capture_world_screenshot, clear_world_thumbnail, create_world, inspect_world, list_abilities, list_achievements, list_my_worlds, list_templates, list_world_products, placements_bake, placements_inspect, publish_unreal_world, publish_world, read_template, register_achievement, register_world_product, scaffold_world, set_achievement_icon, set_preview_video, set_world_thumbnail, terrain_generate, terrain_import, terrain_inspect, update_achievement, update_world_product, validate_world, world_metrics.

Getting started and account

Docs, skills, sign-in and environment checks. 10 tools: check_for_updates, check_login, get_started, model_build, model_search, read_doc, read_skill, start_login, unreal_doctor, whoami.