Behavior Trees MCP

An open-source MCP server that allows AI agents to validate behavior3 JSON or BehaviorTree.CPP XML trees, convert between formats, list node types, retrieve examples, and generate editor links for visual inspection and editing.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by behaviortrees

MCP endpoint (Streamable HTTP)

https://www.behaviortrees.com/mcp

Vendor documentation

What its tools do

6 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

6 of 6 have a description · 6 of 6 declare behavior hints · 5 of 5 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 11:57 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Validate behavior tree structure for errors
Convert trees between JSON and XML formats
Generate shareable editor links for trees
List available built-in node types

Source and maintenance

Community listingRegistry 0.1.1

mcp-registry: io.github.behaviortrees/behaviortrees@0.1.1 Source repository Project website

Maintenance checked: Nov 6, 2026, 11:48 PM UTC

Protocol and capabilities

Server: behaviortrees 0.1.1
MCP protocol negotiated in check: 2025-11-25
Tools: 6 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Tools for behavior trees (game AI and robotics) from https://www.behaviortrees.com, a visual behavior tree editor. Typical flow when a user wants a behavior tree: write it as behavior3 JSON, check it with validate_tree, fix any errors, then create_editor_link returns a link that opens the tree in the editor in their browser, laid out and editable, with no account needed. convert_tree turns behavior3 JSON into BehaviorTree.CPP XML (Groot2, ROS 2 Nav2) and back. list_node_types shows the built-in nodes; get_example returns complete example trees to copy from; read_guide explains concepts.

Tools

6 advertised

validate_tree — Validate a behavior tree

Advertised by the server during the last successful anonymous check.

Advertised read-only

Checks a behavior tree for errors: missing or dangling children, nodes with two parents, cycles, decorators with more than one child, leaves with children, unknown node names, and BehaviorTree.CPP import problems. Returns valid (true when there are no errors), the trees found, and findings at error, warning or info level.

validate_tree input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "tree"
  ],
  "properties": {
    "tree": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {}
        }
      ],
      "description": "The tree: behavior3 JSON: {\"title\": \"...\", \"root\": \"<id of the first node under the root>\", \"nodes\": {\"<id>\": {\"name\": \"<node type>\", \"title\": \"<optional label>\", \"children\": [\"<id>\", ...] (composites, in run order) or \"child\": \"<id>\" (decorators), \"properties\": {...}}}, \"custom_nodes\": [{\"name\": \"IsEnemyVisible\", \"category\": \"condition\"}]}. Positions (\"display\") are optional. Any node name that isn't built in (see list_node_types) must be declared in custom_nodes with a category of action, condition, composite or decorator. A whole project ({\"trees\": [...], \"custom_nodes\": [...]}) or BehaviorTree.CPP XML also works."
    }
  }
}

validate_tree annotations

{
  "title": "Validate a behavior tree",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

create_editor_link — Open a tree in the editor

Advertised by the server during the last successful anonymous check.

Advertised read-only

Returns a url that opens the tree in the behaviortrees.com editor in the user's browser, auto-laid-out and editable, with no account needed. The tree travels inside the link (the URL fragment), so nothing is uploaded or stored. Fails with the validation errors if the tree has any.

create_editor_link input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "tree"
  ],
  "properties": {
    "tree": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {}
        }
      ],
      "description": "The tree: behavior3 JSON: {\"title\": \"...\", \"root\": \"<id of the first node under the root>\", \"nodes\": {\"<id>\": {\"name\": \"<node type>\", \"title\": \"<optional label>\", \"children\": [\"<id>\", ...] (composites, in run order) or \"child\": \"<id>\" (decorators), \"properties\": {...}}}, \"custom_nodes\": [{\"name\": \"IsEnemyVisible\", \"category\": \"condition\"}]}. Positions (\"display\") are optional. Any node name that isn't built in (see list_node_types) must be declared in custom_nodes with a category of action, condition, composite or decorator. A whole project ({\"trees\": [...], \"custom_nodes\": [...]}) or BehaviorTree.CPP XML also works."
    }
  }
}

create_editor_link annotations

{
  "title": "Open a tree in the editor",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

convert_tree — Convert a behavior tree

Advertised by the server during the last successful anonymous check.

Advertised read-only

Convert between behavior3 JSON and BehaviorTree.CPP XML (v4 for ROS 2 Jazzy and Groot2, v3 for ROS 2 Humble), the same way the editor imports and exports. Returns the converted text and any issues (BT.CPP has no equivalent for some behavior3 nodes and vice versa).

convert_tree input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "tree",
    "to"
  ],
  "properties": {
    "to": {
      "enum": [
        "behavior3",
        "btcpp-v4",
        "btcpp-v3"
      ],
      "type": "string",
      "description": "Target format: behavior3, btcpp-v4 or btcpp-v3"
    },
    "tree": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "object",
          "propertyNames": {
            "type": "string"
          },
          "additionalProperties": {}
        }
      ],
      "description": "The tree: behavior3 JSON: {\"title\": \"...\", \"root\": \"<id of the first node under the root>\", \"nodes\": {\"<id>\": {\"name\": \"<node type>\", \"title\": \"<optional label>\", \"children\": [\"<id>\", ...] (composites, in run order) or \"child\": \"<id>\" (decorators), \"properties\": {...}}}, \"custom_nodes\": [{\"name\": \"IsEnemyVisible\", \"category\": \"condition\"}]}. Positions (\"display\") are optional. Any node name that isn't built in (see list_node_types) must be declared in custom_nodes with a category of action, condition, composite or decorator. A whole project ({\"trees\": [...], \"custom_nodes\": [...]}) or BehaviorTree.CPP XML also works."
    }
  }
}

convert_tree annotations

{
  "title": "Convert a behavior tree",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

list_node_types — List built-in node types

Advertised by the server during the last successful anonymous check.

Advertised read-only

The built-in behavior3 nodes a tree can use without declaring them: composites (Sequence, Priority = selector/fallback, MemSequence, MemPriority), decorators (Inverter, Repeater, MaxTime, ...) and leaves (Wait, Succeeder, Failer, ...), with descriptions and default properties.

list_node_types input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}

list_node_types annotations

{
  "title": "List built-in node types",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

get_example — Get an example tree

Advertised by the server during the last successful anonymous check.

Advertised read-only

Complete, working example trees (enemy patrol, cooldown-gated attacks, robot navigation with recovery, and more) to learn the format from or start with. Without an id, lists the examples; with an id, returns that tree as behavior3 JSON.

get_example input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "id": {
      "type": "string",
      "description": "Example id from the list; omit to list them"
    }
  }
}

get_example annotations

{
  "title": "Get an example tree",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

read_guide — Read a behavior tree guide

Advertised by the server during the last successful anonymous check.

Advertised read-onlyOpen-world

Practical guides from behaviortrees.com/learn as Markdown: what behavior trees are, node types, blackboards, debugging, structuring large trees, and behavior trees in Unity, Unreal, Godot, Python and robotics (BehaviorTree.CPP, ROS 2, Nav2). Without a slug, lists the guides.

read_guide input schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "slug": {
      "type": "string",
      "description": "Guide slug from the list; omit to list them"
    }
  }
}

read_guide annotations

{
  "title": "Read a behavior tree guide",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 417 ms
95th percentile latency: 417 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 11:57 PM UTC · probe · passed · 417 ms · metadata changed · 6 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http behavior-trees-mcp https://www.behaviortrees.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add behavior-trees-mcp --url https://www.behaviortrees.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable behavior-trees-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "behavior-trees-mcp": {
      "url": "https://www.behaviortrees.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "behavior-trees-mcp": {
      "type": "streamableHttp",
      "url": "https://www.behaviortrees.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start behavior-trees-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "behavior-trees-mcp": {
      "type": "http",
      "url": "https://www.behaviortrees.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http behavior-trees-mcp https://www.behaviortrees.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://www.behaviortrees.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "behavior-trees-mcp": {
      "serverUrl": "https://www.behaviortrees.com/mcp"
    }
  }
}

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Behavior Trees MCP

Endpoint and access

What its tools do

Read-only (6)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Server-provided instructions

Tools

Prompts

Resources

90-day uptime

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other developer tools servers