How do I install Horizun Revit MCP?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Horizun Revit MCP need an API key?

No required environment variable is listed on this record.

What transport does Horizun Revit MCP use?

Horizun Revit MCP runs locally over stdio.

When was Horizun Revit MCP last checked?

Last checked 2026-11-09. Local Windows MCP for Revit 2023-2027. Run the Windows installer before connecting a client.

Horizun Revit MCP server

Horizun Revit MCP — model, document, coordinate and deliver in Revit

Made in Colombia 🇨🇴 by Horizun Group.

Horizun Revit MCP is a free, open-source Windows MCP server and Revit add-in for Autodesk Revit 2023–2027. Its complete catalog contains 125 tools with 481 named suboperations and dispatch modes for architectural and structural modeling, MEP, parametric families, drawings, CAD-to-BIM, model audits, quantities, Excel, Power BI and exports.

Use natural-language objectives in your MCP client to create new BIM content, inspect existing models and carry out multi-step production workflows. Typed changes include rehearsal, explicit targets and post-commit verification; owner-enabled Python extends the bridge to task-specific Revit API automation. The downloadable Windows installer includes the server runtime and Revit add-ins.

English · Español

Download · Watch the demo · What's new in 3.0 · Install with Claude Desktop Free · All tools · Suboperations · Release evidence · Install

What's new in 3.0

Steel: typed reinforcement rules now cover bars crossing hosts, anchorage, laps, sections, slabs, foundations, walls, columns, couplers, crossing order and post-commit geometry audit. horizun_read_schedule reads vector PDF or DWG schedule cards and refuses ambiguous rows. See the steel capability matrix.
Interoperability: horizun_exchange emits and verifies horizun.exchange/0 manifests, carries model identity, and checks review correction plans before and after applying them. See tool details.
Schema on demand: full remains the default. Set HORIZUN_SCHEMA_MODE=facade per client to expose health and three server-side discovery/call tools, which retrieve exact schemas as needed. The measured reduction in tools/list size has not yet been paired with a completed agent comparison. See client setup and measurements.
Local toolset: HORIZUN_TOOLSETS=local narrows the advertised typed surface for short-context clients while preserving the permission gate. The schema mode and toolset are independent.

For existing installations, follow Migration to 3.0: protocol 3 requires the server and add-in to be updated together. Release notes summarize the release.

Product at a glance

Surface	What is available	Inspect it
MCP entry points	125 tools , including 46 read-only and 79 with possible effects	Generated inventory and full catalog below
Internal actions	481 named suboperations and dispatch modes inside multi-operation tools	Exact selector values below
Revit coverage	2023, 2024, 2025, 2026 and 2027	Five matching add-ins and versioned live reports
New model content	26 element kinds; parametric RFA authoring; structural and MEP planning	Creation and family reference
Drawings and deliverables	24 view/sheet actions, 10 annotation actions, native schedules and sheet layout	Planimetry production
Export targets	PDF, DWG, DGN, DWFx, IFC, NWC, FBX, gbXML, COBie, RFA families, images and schedule CSV	`horizun_export`
Verified release example	1,230 passed probe executions across five Revit years in v1.3.3	Published reports
Installation	Windows Setup with runtime included; no Git, Visual Studio or .NET SDK for end users	Client-specific final steps

Counts describe the complete product surface. The active permission profile and tool packs determine which tools a particular session exposes; the measured 70/79/80-tool profiles are explained below.

What's new in 2.1

Every item below is part of this release, was built with the same verified-write contract (rehearse, token, apply, re-read) and, where a fixture exists, was measured live in Revit. The detail of each one is in the CHANGELOG.

New tools and new ways to build

Light-gauge framing, horizun_framing — studs, tracks, kings, jacks, headers, sills, cripples and blocking inside a wall layer, and suspended-ceiling framing, from a detail spec the MCP client reads from an image or DWG (prompt framing-from-detail).
Curtain-method framing — the same framing modeled with Curtain Walls and flat Sloped Glazing layers (stud mullions, fixed-distance grids, hangers to the floor above), for teams that work that way.
Exploding multilayer walls with openings — horizun_split_multilayer_walls now converts walls that host doors, windows and nested components: the carrier keeps its identity and its inserts, and every layer becomes its own wall.
COBie 2.4 workbook — horizun_export format=cobie: Facility, Floor, Space, Zone, Type, Component and System sheets, re-read cell by cell, with deliverable_ready and a finding for every missing required value.
New element kinds — sprinkler, flex pipe, flex duct, space, area and area boundary in horizun_create_elements; rooms and spaces for every empty circuit (placement=all_enclosed); toposolids (Revit 2024+).
Sketch editing without losing the element — edit_sketch for floors, ceilings and openings keeps the id and the hosted data.

MEP and clash resolution

Automatic MEP routing — horizun_mep_routing route: an orthogonal 3-D path around physical elements and links, with segments and elbows re-read at every junction.
Gravity slopes — slope: a pipe run to a target grade from a fixed end, every connection re-read.
Hangers — hangers: a caller family at spaced stations under the structure above (host or link).
Openings and sleeves for clashes — horizun_resolve_clash propose_opening / apply_opening cuts walls, floors, roofs and ceilings or places a sleeve family when a move cannot fix the clash.
Clashes against links and connected runs — moves are checked against every loaded link, and a connected pipe-elbow-pipe network moves as one rigid body (run_shift).
System analysis — horizun_plan_mep system_analysis reads the critical path, pressure loss, flow and velocity Revit computed.

Coordination, CDE and openBIM

ACC Issues — horizun_cde_cloud issues_list / issue_create / issue_update, as the signed-in user, idempotent by an external key and read back after every write.
Navisworks round trip — readiness and preparation of the 3D views Navisworks reads, and status suggestions from the coordination ledger.
BCF from any tool — Navisworks, ACC, Solibri or BIMcollab topics (BCF 2.1/3.0) resolved by IFC GUID or authoring-tool id.
ISO 19650 information management — project context (project-intake), information containers across WIP/Shared/Published/Archived, and IFC delivery proved against IDS, Pset mapping and georeference.
Synchronize with central — horizun_document_session sync_with_central, off by default and enabled only by the machine owner in Revit; relinquish all, keep borrowed or none, verified after the sync.
Shared coordinates, point clouds and scan deviation — acquire_coordinates, point cloud links and scan_deviation of model faces against a scan, with coverage measured.

Verification you can see

Spatial check after every write — overlaps, blocked doors, duplicates and MEP through structure are reported with the write; horizun_verify_changes returns an image with the changed elements highlighted.
Before/after snapshots — snapshot / compare_to with the same camera and a red diff mapped back to the elements written.
Equipment clearance zones — clearance_rules check working-space zones against host and links.
Egress travel distance — horizun_code_check with Revit's path of travel, reported as a lower bound or not_decidable with the reason.
Energy readiness — energy_readiness builds and rolls back the energy model and reports enclosure, constructions and window-to-wall ratio.

Documentation, quantities and exchange

More export formats — DWG for many views or sheets in one job, gbXML, DGN, DWFx and loaded families to .rfa, each file read back.
Finishes by room — horizun_quantities room_finishes: wall, floor and ceiling faces per room or space, by material, with openings deducted.
Budget export to BC3 — horizun_budget_compare export_bc3 (FIEBDC-3) from the takeoff and the caller's prices.
Sheets and views — renumber_sheets with collisions checked first, and set_view_display fixes detail level or discipline citing the audit finding.
Structural analytical model and loads — horizun_query_structure analytical and loads, grouped by load case.
Power BI coordination dashboard — a .pbip example over the coordination ledger.
A smaller tool list — tools/list is about 64 KB smaller without removing a tool, argument or operation, so clients load it faster.

Watch a real workflow: PDF plans to a Revit model

PDF plans → Revit model with AI — watch on YouTube is a published Spanish-language demonstration from the Horizun Hub channel. It presents a PDF-to-Revit workflow driven by an AI client. PDF interpretation belongs to the client/model; Horizun supplies the operations executed in Revit. The separate typed DWG workflow below reads CAD geometry and versioned rules.

What you can build and deliver

Architectural, structural and MEP modeling

horizun_create_elements accepts dependency-aware batches of levels, grids, walls, floors, ceilings, roofs, rooms, family instances, structural beams and columns, beam systems, wall foundations, ducts, pipes, conduit, cable trays, fittings, inline accessories, MEP systems, openings, shafts, room separators, profile walls, displacement sets and supported stairs.

The suboperation table lists all 26 creation kinds and five fitting choices. horizun_transform_elements handles moves, copies, rotations, wall joins, type/curve changes and tag placement. horizun_manage_system_types supports compound material-layer structures and MEP junction preferences. Structural and MEP planners produce requests that use these same creation tools.

New parametric families, including MEP connectors

horizun_create_family creates a new .rfa from an installed .rft: parameters, formulas, named types, solid/void extrusions, blends, revolutions, sweeps and swept blends; reference planes and labeled dimensions; supported nested families; and pipe, duct, electrical, conduit or cable-tray connectors. Save and optional project load are verified. horizun_family_apply edits existing family data with a geometry invariant. RFA examples and template scope.

Drawings, automated annotation and sheet production

Build floor/ceiling/structural/area plans, sections, elevations, callouts, drafting and 3D views. Manage templates, phases, crops, view ranges and scope boxes; create, duplicate and populate sheets; place schedules and align viewports. Annotation tools support text, tags, linear/angular/radial/diameter/arc-length dimensions and spot elevation/coordinate/slope labels.

Plan dimensions and tags from explicit criteria, inspect geometric references, create 2D details, audit planimetry, apply cited corrections and pack sheet zones. horizun_plan_views and the deliverable-production prompt coordinate delivery stages and approval state. Drawing workflows.

DWG to BIM, with traceable revision updates

Inspect DWG instances, layers and curves. Supply a versioned requirement set to map drawing content into an ordered BIM plan. Rehearse and apply the plan through typed tools, with source fingerprints and provenance attached to created elements. Audit the model against the drawing; plan and apply later DWG revisions while identifying manual model edits that need review. These are seven dedicated CAD tools, listed individually below. DWG-to-BIM examples.

Audits, coordination, quantities and data exchange

Query the host and loaded links using category, family/type, level, parameter and spatial filters. Scan model health, audit supplied requirements and make verified parameter corrections. Coordinate clashes with persistent findings, assignment, decisions and model-measured resolution. Plan reinforcement, apply supported reinforcement requests and audit their results.

Produce material takeoffs, compare them against an Excel budget baseline, read or append XLSX rows without Excel/COM, push approved data to Power BI and export verified deliverables. Quantities, Power BI, audit starter.

Specialized model transformations and terrain

Separate wall or slab layers, split floors by loops, rectangularize supported wall geometry, ungroup with origin tracking and regroup by a parameter. Transfer slab elevations, embed floors in toposolids and grade terrain with breaklines and specified slopes. Wall-layer decomposition preserves the core wall's identity and hosted elements. Bundled recipe tools use shipped Python for geometry under host-controlled rehearsal, transactions and their declared readback checks; arbitrary client-generated Python has a separate permission/evidence contract.

Install

Download the Windows installer

Requires Windows x64, Revit 2023–2027 and an MCP client.
Setup includes the server runtime and matching Revit add-ins. No Git, Visual Studio or .NET SDK is needed.
Close Revit before running Setup.
The server and add-ins are intentionally unsigned; from v3.0.2 the Setup is signed by HORIZUN GROUP S.A.S. (Certum). SHA-256 checks verify the downloaded bytes; they do not authenticate a Windows publisher. Revit may show an unsigned add-in warning. See the signing policy.

Open the release above and download horizun-mcp-<version>-setup.exe and SHA256SUMS.txt from Assets. The source ZIP is for development.
Verify the hash using the installation guide, then run Setup.
Complete your client's connection step:

Client	Final connection step
Codex / Claude Code	Let Setup's helper register after the client closes, then reopen it.
Claude Desktop	Install the `.mcpb` delivered to Documents\Horizun-Revit-MCP from Settings → Extensions, then restart Claude Desktop.
ChatGPT Work	Complete the Secure MCP Tunnel setup for the installed server.
Other stdio clients	Register the installed executable using its full path.

Start Revit, open a document and ask your client to call horizun_health. Confirm the active document and loaded version.

Claude Desktop needs the extension installation inside the app. Setup puts the package and illustrated instructions in the Documents folder above. Drag the package onto the Extensions page or use Advanced settings → Install extension. The extension connects to the installed server; it does not replace Setup. See client instructions and recovery.

Installation video: Claude Desktop Free

Connect Revit to Claude Desktop Free — watch the installation tutorial is a Spanish-language guide published by Horizun Hub to installing and connecting Horizun Revit MCP with the free Claude Desktop plan. Follow the Setup and .mcpb steps above; the client guide provides the written instructions.

Optional PowerShell bootstrap

This downloads the release installer, checks its hash and runs Setup quietly. -AllowUnsigned acknowledges the publisher status described above. The same client-specific final steps still apply; use -Interactive for the wizard.

$s = irm https://raw.githubusercontent.com/HorizunGroup/horizun-revit-mcp/main/install-release.ps1; & ([scriptblock]::Create($s)) -AllowUnsigned

The script is fetched from main; its checksum check applies to the downloaded Setup. You can download and inspect the script first. See installation options.

Complete tool catalog

Every named MCP tool is listed here, grouped by the work it performs. These groups are a reading aid; session tool packs are the configurable sets implemented in ToolPacks.cs. Descriptions are maintained in the bilingual catalog; counts and membership are checked against the server-generated inventory. The detailed tool reference documents arguments and limitations.

Connection, documents and background jobs

Tool	Capability
`get_document_info`	Inspect the open document's identity and element counts.
`horizun_document_session`	Inspect, open, save, save-as and close documents, or create a blank project from a template, through explicit session operations.
`horizun_file_info`	Read RVT/RFA headers, version and worksharing metadata without opening or upgrading them.
`horizun_health`	Report bridge health, active document, version, commit and Python runtime state.
`horizun_job_status`	Read progress and recovery state while Revit is busy or after a process restart.
`horizun_open_document`	Open a model with checks for version upgrades and workshared central files.
`horizun_relinquish_all`	Release owned worksharing elements and report remaining ownership.
`horizun_repair_memory`	Report and recover durable state this bridge keeps when a record is unreadable.
`horizun_save_document`	Save and inspect the resulting file's timestamp and size.
`horizun_selection_exchange`	Read what a person selected in Revit, and offer a set back for them to select.
`horizun_submit_job`	Submit long-running Revit operations with a persistent job identifier.
`horizun_target`	Select the Revit instance to control when multiple sessions or years are open.

Model queries, audits and correction

Tool	Capability
`horizun_apply_corrections`	Rehearse and apply supported audit corrections with per-result verification.
`horizun_apply_ifc_plan`	Carry out an IFC plan through typed commands that rehearse and re-read their own work.
`horizun_audit_access`	Report what this bridge is allowed to do on this machine and who decided it.
`horizun_audit_model`	Evaluate supplied model requirements with findings, coverage and prevention-gate evidence.
`horizun_capture_view`	Export the active or named view as an image for visual review by the client.
`horizun_verify_changes`	Check what the last write changed for spatial conflicts and return an image with them highlighted.
`horizun_delete_verified`	Delete explicit IDs or purge unused content; preview cascades and verify removals.
`horizun_list_elements`	List and paginate elements across the host and loaded Revit links with model identity.
`horizun_model_scan`	Measure model health, warnings, worksets, links, families, views and cleanup candidates.
`horizun_navigate`	Select elements, clear selection, zoom and open views.
`horizun_plan_from_ifc`	Plan Revit elements from an IFC file under a declared mapping, without importing it.
`horizun_query_model`	Filter by category, type, level, parameters and spatial bounds; project fields and return grouped or compact summaries.
`horizun_validate_ids`	Check a model against an IDS specification and report each requirement it fails.
`horizun_query_classification`	Read the keynote and assembly-code tables, their use in the model, missing and unused codes, and families' lookup tables.
`horizun_model_diff`	Snapshot models and compare deliveries: added, deleted and changed elements with parameters, a coloured view, a plain summary and quality history.
`horizun_code_check`

Model creation, parameters and families

Tool	Capability
`horizun_bind_shared_param`	Bind shared parameters to categories and inspect group-variation behavior.
`horizun_copy_between_documents`	Copy elements between open documents, keeping identity and reporting what was substituted.
`horizun_create_elements`	Create levels, grids, walls, slabs, roofs, rooms, family instances, structural members, MEP runs, openings and stairs in typed batches.
`horizun_create_family`	Create new parametric RFA files: solid/void forms, parameters, formulas, types, nested families and MEP connectors; optionally load them.
`horizun_family_apply`	Apply family edits in a transaction with a geometry invariant and rollback on drift.
`horizun_manage_materials`	Read, create and assign materials and their appearance and identity data.
`horizun_manage_system_types`	Duplicate system types; edit parameters, wall/slab/roof/ceiling layer structures and MEP junction preferences.
`horizun_set_keynote`	Assign keynote values with the affected instance/type scope made explicit.
`horizun_transform_elements`	Move, copy, rotate, pin, change types or curves and adjust tag heads/leaders over explicit targets.
`horizun_write_params_verified`	Write parameter values in batches and re-read each requested value.
`horizun_manage_parameters`	Read the full binding map, create and bind shared parameters, rebind or remove bindings, and manage Global Parameters.
`horizun_manage_curtain`	Read and edit curtain grids: grid lines, mullions and panel types, re-measured after each change.
`horizun_slab_shape`	Edit floor and roof shape: points, split lines and vertex elevations, with a reset.
`horizun_create_railing`	Create railings on stairs or ramps, or from a sketched path on a level.
`horizun_manage_phases`	Read phases, filters and design options; set element phases and create or edit phase filters.

Drawings, dimensions, sheets and schedules

Tool	Capability
`horizun_manage_views`	Create and configure plans, sections, elevations, callouts, 3D views, sheets, viewports and schedule placements.
`horizun_plan_views`	Plan room views and deliverable sets; track delivery status, approvals and invalidation.
`horizun_query_planimetry`	Inspect sheets, views, placements, annotations and drawing references with geometry and coverage.
`horizun_audit_planimetry`	Audit drawing requirements and return cited findings for correction.
`horizun_fix_planimetry`	Correct cited view, sheet, title-block, viewport, schedule and crop findings.
`horizun_pack_sheets`	Place views and schedules within supplied sheet zones and check resulting placements.
`horizun_plan_annotations`	Plan automatic tags and dimensions for grids, levels, curtain walls and openings using explicit criteria.
`horizun_annotate`	Create text, tags, linear/angular/radial/diameter/arc-length dimensions and spot elevations, coordinates or slopes.
`horizun_get_dimension_references`	Discover geometric references that can be used in dimension requests.
`horizun_query_dimensions`	Inspect existing dimensions, segments, references and measured values.
`horizun_edit_dimensions`	Apply supported dimension edits and verify the resulting dimension state.
`horizun_query_detail_2d`	Read a view's detail geometry, line styles, region types and placeable symbols.
`horizun_detail_2d`	Create detail lines/arcs/polylines, filled/masking regions and components in verified atomic batches.
`horizun_manage_revisions`	Create and update drawing revision records.
`horizun_create_schedule`	Create a native schedule with selected fields, sorting and optional linked elements.
`horizun_manage_schedules`	Create, duplicate and configure schedules, material takeoffs, sheet/view lists, revision schedules and keynote legends.

CAD / DWG to BIM and revision updates

Tool	Capability
`horizun_apply_cad_plan`	Build the plan through typed commands; verify source hashes and stamp created elements with CAD provenance.
`horizun_apply_cad_update`	Apply supported revision changes and preserve provenance for the next update.
`horizun_audit_cad_model`	Compare the drawing against the model using provenance, geometry and measured differences.
`horizun_cad_connect`	Build the joins a drawing declares, placing the fitting each junction needs and verifying it.
`horizun_cad_extract`	Extract CAD geometry and, with a readable source DWG, text; plan detail transfer with measured gaps.
`horizun_cad_networks`	Derive the network a drawing describes: which ends meet, what belongs between them and which stay open.
`horizun_cad_review`	Report what a conversion could not settle, with the evidence for each held candidate.
`horizun_cad_symbols`	List the block symbols a drawing defines and where each one is placed.
`horizun_cad_unit_instances`	Find repeated units in a drawing and the transform that places each occurrence.
`horizun_manage_cad_links`	List, add, reload and repoint CAD links with measured state.
`horizun_plan_cad_update`	Plan changes between DWG revisions while identifying manual model edits that need review.
`horizun_plan_from_cad`	Interpret a DWG using supplied versioned rules and return a dependency-ordered BIM plan with omissions and provenance.
`horizun_query_cad`	Inspect DWG instances, layers, curve geometry, profiles and readable coverage.

Structure, reinforcement, MEP and coordination

Tool	Capability
`horizun_acc_upload_status`	Read Desktop Connector log evidence of ACC folder assignment for local files.
`horizun_apply_reinforcement`	Apply supported reinforcement plans with typed checks and verification.
`horizun_audit_reinforcement`	Audit reinforcement against supplied requirements and report coverage.
`horizun_clash`	Detect scoped clashes, plan supported penetrations and record coordination findings.
`horizun_connect_mep`	Connect or disconnect named MEP connectors, refusing to close a visible gap by moving geometry.
`horizun_coordination`	Track coordination findings, assignments, decisions, evidence and model-detected resolution or regression.
`horizun_manage_links`	Manage Revit links and screen linked-view candidates with explicit uncertainty.
`horizun_plan_mep`	Plan pipe/duct routes and fittings; inspect networks through actual connector connectivity.
`horizun_read_schedule`	Read reinforcement schedule sheets (vector PDF, DWG entities) into bar rows and named self-checks, and propose beam cards as a requirement set keyed by mark; refuse what cannot be read.
`horizun_plan_reinforcement`	Plan reinforcement from supplied host and reinforcement requirements.
`horizun_plan_structure`	Plan columns at grid intersections and beams along consecutive grid crossings.
`horizun_query_structure`	Inspect members, hosts, cover, rebar, reinforcement systems, connections and quantities.
`horizun_structural_connections`	Read and apply structural connection types between framing elements.
`horizun_mep_routing`	Read and edit routing preferences and catalogue sizes, resize MEP runs to catalogue sizes and plan sizes by flow.
`horizun_electrical`	List panels and circuits, create circuits, assign panels, add or remove elements and create panel schedules.

Layers, groups and terrain

Tool	Capability
`horizun_split_floor_loops`	Split a floor by sketch loops while carrying height offsets.
`horizun_split_multilayer_walls`	Separate wall layers while retaining the original core wall identity and its hosted elements.
`horizun_framing`	Build light-gauge stud framing inside a wall layer and suspended-ceiling framing (mains, furring, perimeter, hangers to the structure) from a detail spec, verified, readable and removable.
`horizun_split_multilayer_slabs`	Separate floor/ceiling material layers with profile preservation and per-slab rollback.
`horizun_rectangularize_walls`	Decompose supported orthogonal wall geometry into rectangular fragments.
`horizun_ungroup_and_mark`	Ungroup model groups while recording each member's source group.
`horizun_regroup_by_param`	Rebuild model groups from a supplied grouping parameter.
`horizun_copy_slab_elevations`	Transfer a shaped floor surface onto explicit destination floors.
`horizun_embed_floors_in_toposolid`	Embed floor outlines and elevations into a toposolid.
`horizun_grade_toposolid_around_floors`	Grade terrain around floors with offsets, breaklines and specified side slopes.
`horizun_manage_groups`	Manage groups, find duplicates, preview annotations and preserve pattern placement.
`horizun_manage_worksets`	List, create and rename worksets, move elements between them and set per-view visibility.

Quantities, Excel, Power BI and deliverables

Tool	Capability
`horizun_quantities`	Measure volumes and material takeoffs with units, grouping and model provenance.
`horizun_budget_compare`	Compare model quantities against an Excel baseline; optionally write approved Excel/Power BI outputs.
`horizun_catalog_lookup`	Resolve items from a supplied catalog with leaf-status and file-hash provenance.
`horizun_excel_read_rows`	Read XLSX rows, types and cached formula values without Excel or COM.
`horizun_excel_write_rows`	Append XLSX rows (or start a new workbook), keep a backup in the Horizun state folder and re-read written cells without Excel or COM.
`horizun_power_bi_push`	Send rows to a Power BI push semantic-model table with durable replay protection and destination receipts.
`horizun_export`	Export PDF, DWG, IFC, NWC, FBX, images and schedule CSV with output-file verification.
`horizun_link_schedule`	Import MS Project, Primavera or CSV schedules, link activities to elements, write dates and colour a 4D status view.

Composable workflows and custom API automation

Tool	Capability
`horizun_execute_plan`	Compose up to 100 typed actions with dependencies, prior-result references and TransactionGroup rollback.
`horizun_execute_python`	Run client-generated Python against the Revit API, including preflight and script-supplied evidence; owner opt-in required.
`horizun_promote_script`	Promote a verified script to a named procedure so it stops being ad-hoc code.
`horizun_request_python_access`	Show an owner-approval request in Revit for custom Python execution.
`horizun_run_procedure`	Run a named, versioned procedure that this machine has stored, with its own consent.

ISO 19650 information management and openBIM delivery

Tool	Capability
`horizun_project_context`	Validate, question and draft the project's ISO 19650 context: appointment, EIR/BEP/MIDP, CDE states, naming, delivery; register its models by strong identity evidence.
`horizun_exchange`	Wrap a cross-app hop in a verified horizun.exchange/0 manifest, check one before consuming it, and reconcile a review's correction plan.
`horizun_information_container`	Name, seal, verify, inspect and transition information containers across WIP, Shared, Published and Archived folders.
`horizun_deliver_ifc`	Export an IFC and prove it: IDS on the file, property-set mapping coverage, georeference, BCF of failures and a sealed container.
`horizun_cde_cloud`	Read a cloud CDE (Autodesk Construction Cloud or an OpenCDE server) by state and cross it against the MIDP, read-only.

Suboperations and modes

A named MCP tool can dispatch many actions. For example, creating a wall, a pipe and a stair are choices under horizun_create_elements; creating a section and placing a schedule are different actions under horizun_manage_views.

The table contains 481 named suboperations and dispatch modes across 26 multi-operation tools. A choice is counted once per tool, selector property and value, including nested selectors. Repeated oneOf schema paths are deduplicated. Some selectors refine another action: these numbers describe the exposed operation vocabulary, not 208 additional top-level tools.

Tool	Selector	Named suboperations and modes
`horizun_document_session`	`operation`	`open`, `save`, `save_as`, `close`, `inspect`, `sync_with_central`, `new_project`
`horizun_repair_memory`	`operation`	`list`, `advice`, `observe`, `remedy`, `quarantine`, `release`
`horizun_selection_exchange`	`operation`	`publish`, `read`, `clear`, `capabilities`
`horizun_audit_model`	`operation`	`save`, `save_as`, `sync_with_central`, `export`, `publish`, `close_with_save`, `batch_open_close`
`horizun_verify_changes`	`operation`	`check`, `snapshot`, `compare_to`
`horizun_delete_verified`	`mode`	`ids`, `purge_unused`
`horizun_navigate`	`operation`	`select`, `clear_selection`, `zoom`, `select_and_zoom`, `open_view`
`horizun_validate_ids`	`operation`	`precheck`, `validate`
`horizun_query_classification`	`operation`	`keynote_table`, `assembly_code`, `family_lookup_tables`, `unused_codes`, `missing_codes`
`horizun_model_diff`

Other typed options include the seven horizun_export.format values: pdf, dwg, ifc, nwc, fbx, image, schedule_csv. The schema inventory also records 1653 enumerated argument occurrences across all properties and paths; that figure includes configuration choices and repeated paths, so it is not used as a tool count.

Extensibility, permissions and tool discovery

Compose new workflows: horizun_execute_plan connects up to 100 typed actions using prior results and named dependencies, with TransactionGroup rollback. Task-specific project standards, catalogs and CAD interpretation rules are inputs. Extend to custom Revit API work: an owner may enable horizun_execute_python for client-generated Python, including the standard library, preflight and structured script evidence. The Python ON/OFF grant persists until revoked. Python results remain self-reported with host_verified: false.

The following profiles were measured against the same 1.3.3 server binary in isolated settings directories using actual MCP tools/list calls:

Profile and packs	Tools announced	Why
`safe_write`, all packs, Python off	70	Default in-model work; external-effect tools are filtered
`full_write`, all packs, Python off	79	Adds file/export/document and other external-effect operations
`unsafe_code`, all packs, Python enabled	80	Complete catalog, including custom Python
`safe_write`, `core` only	4	Deliberately minimal connection and job-management set

A session exposing fewer tools can be correctly configured for a narrow task. Inspect horizun_health and the horizun://security/current-profile resource before comparing a session with the complete catalog. Owners control permissions; an evaluator does not need to enable arbitrary code just to read the catalog.

For clients that support them, the server also offers standard MCP Resources, Prompts, Completions, logging and durable Tasks. Resources expose the compiled tool contract, build identity, effective profile and BIM workflow guidance. Named prompts cover family recipes, room documentation, audits and delivery. These protocol features and workflow prompts are additional to the tool count. tools/list schemas are abridged; the exact one is horizun://contract/tools/{tool} (or .../{tool}/{variant} for one create_elements kind or document_session operation), and a failed call that violates it names the failing path and that URI (with structuredContent.schema_help when the reply is structured) (details).

Tool packs, compact/summary queries, selected-field projections and durable jobs help manage context and long-running work. Calls use a bounded 16-slot FIFO queue; queued work can be cancelled before execution. Long operations expose a persistent job ID and readable status. Architecture.

Tested in Revit: published release evidence

v1.3.3, published on 2026-09-15, includes live release-gate reports for the installed server and all five supported Revit years. The reports total 1,230 passed probe executions: 246 in each year, with zero failed, unverified or not-covered probes in that suite. Each report identifies the release commit, binary hashes and harness. Release assets.

Revit	Passed	Report
2023	246	JSON
2024	246	JSON
2025	246	JSON
2026	246	JSON
2027	246	JSON

This is one release suite executed across five Revit versions. It is maintainer evidence for those cases, not 1,230 different features or a comparison against another product. The machine-readable evidence index records the source URLs and hashes. Ongoing GitHub CI checks core/server behavior, Windows deployment, inventory/documentation consistency and CodeQL.

Public release history starts with v0.5.0 on 2026-08-02, includes v1.0.0 on 2026-08-26, and contains 16 published non-prerelease releases as of 2026-09-15. The GitHub stars badge above shows the current community count; the public release history and commit history show maintenance directly.

Version and compatibility

Question	Authoritative source
Latest stable download	GitHub latest release, including its publication date and assets
Version of this source checkout	Directory.Build.props
Version actually loaded	`horizun_health`: version, commit, Revit year and active document
MCP protocol implemented	2025-11-25, with earlier revisions listed in ProtocolNegotiation.cs
Published registry metadata	Official registry entry

MCP 2026-07-28 support is pending. A recent product release does not imply support for that protocol revision. Registry snapshots and search extracts may lag; check the release before choosing a version. Upgrade release installations by running the new Setup with Revit closed.

Scope and further reference

Typed results identify verification, partial outcomes and coverage. Unloaded links and unsupported API/template/exporter cases are reported explicitly. Use TOOLS.md and family scope for operation-specific boundaries. Benchmark methodology distinguishes historical design scoring from live execution evidence.

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Horizun Hub teaches, in Spanish, how to direct AI agents in real construction and design work — and how to review what they deliver before you sign it. The course for this MCP is Opera agentes en Revit: short classes on real construction work, with a verifiable certificate.

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Built in Colombia 🇨🇴 and maintained by Horizun Group as part of Horizun Hub. The bridge is organisation-neutral; project standards and catalogs are supplied as inputs. The optional standards pack provides editable examples.

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