Tool tree

usechar.ai

AI & AgentsTools verifiedOct 26, 2026

Ship a UI-first copilot (no backend rewrite). Turn the signed‑in user session into the universal API—and capture decision traces—via WebMCP.

demo_register_toolAction

View tool JSON

{
  "name": "demo_register_tool",
  "kind": "act",
  "impl": "imperative",
  "description": "Register a new WebMCP tool dynamically. The tool will be available immediately for use.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "name": {
        "type": "string",
        "description": "Tool name (snake_case recommended)"
      },
      "toolDescription": {
        "type": "string",
        "description": "What the tool does"
      },
      "handlerCode": {
        "type": "string",
        "description": "JavaScript function body. Receives 'args' parameter."
      }
    },
    "required": [
      "name",
      "toolDescription",
      "handlerCode"
    ]
  },
  "page": "/"
}

demo_update_stylesAction

Update the Char widget's visual appearance via CSS variables. Available variables: --char-color-primary (hex), --char-color-background (hex), --char-color-foreground (hex), --char-color-muted (hex), --char-color-border (rgba or hex), --char-radius (px value like "8px" or "0")

View tool JSON

{
  "name": "demo_update_styles",
  "kind": "act",
  "impl": "imperative",
  "description": "Update the Char widget's visual appearance via CSS variables.\nAvailable variables: --char-color-primary (hex), --char-color-background (hex), --char-color-foreground (hex), --char-color-muted (hex), --char-color-border (rgba or hex), --char-radius (px value like \"8px\" or \"0\")",
  "inputSchema": {
    "type": "object",
    "properties": {
      "variables": {
        "type": "object",
        "additionalProperties": {
          "type": "string"
        },
        "description": "CSS variable key-value pairs. Example: {\"--char-color-primary\": \"#ff6b35\", \"--char-radius\": \"12px\"}"
      }
    },
    "required": [
      "variables"
    ]
  },
  "page": "/"
}