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Agent components are React components that register MCP tools automatically. Agents interact with these components by calling tools — pushing data into the UI or receiving UI state.

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mcpComponent

The recommended way to create agent-driven components. mcpComponent() is a factory that wraps a React component + zod schema into an MCP-registered component with full type safety. 
import { mcpComponent } from '@frontmcp/react';
import { z } from 'zod';

const WeatherCard = mcpComponent(
  ({ city, temp }) => (
    <div className="weather-card">
      <h2>{city}</h2>
      <p>{temp}°</p>
    </div>
  ),
  {
    name: 'show_weather',
    description: 'Display weather data for a city',
    schema: z.object({
      city: z.string(),
      temp: z.number(),
    }),
    fallback: <p>Waiting for weather data...</p>,
  },
);

// Use it like a normal component
function App() {
  return <WeatherCard />;
}

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How It Works

  1. On mount, mcpComponent registers an MCP tool with the given name and zod schema
  2. Input is validated against the zod schema before reaching your component
  3. Before any agent invocation, the fallback is rendered
  4. When an agent calls the tool, the validated data is passed as typed props
  5. The tool returns a success response to the agent

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Options

OptionTypeDefaultDescription
namestring—Required. MCP tool name agents will call
descriptionstringnameTool description for agents
schemaz.ZodObject—Required. Zod schema for type-safe input
fallbackReactNodenullShown before first invocation
serverstring—Target a named server
columnsMcpColumnDef[]—Table mode column definitions

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Static Properties

The returned component has a .toolName property: 
const WeatherCard = mcpComponent(WeatherCardImpl, { name: 'show_weather', schema });
console.log(WeatherCard.toolName); // 'show_weather'

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Patterns

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Wrapping Existing Components

import { WeatherCardImpl } from './WeatherCard';

const WeatherCard = mcpComponent(WeatherCardImpl, {
  name: 'show_weather',
  description: 'Display weather data',
  schema: z.object({ city: z.string(), temp: z.number() }),
  fallback: <Skeleton />,
});

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Inline Components

const MetricsCard = mcpComponent(
  ({ cpu, memory }) => (
    <div>
      <span>CPU: {cpu}%</span>
      <span>Memory: {memory}%</span>
    </div>
  ),
  {
    name: 'show_metrics',
    schema: z.object({ cpu: z.number(), memory: z.number() }),
  },
);

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Lazy Loading

const HeavyChart = mcpComponent(
  () => import('./HeavyChart'),
  {
    name: 'show_chart',
    schema: z.object({ data: z.array(z.number()), label: z.string() }),
    fallback: <p>Loading chart...</p>,
  },
);

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Dashboard Widgets

Use multiple mcpComponent instances to build agent-controlled dashboards: 
function AgentDashboard() {
  return (
    <div className="grid grid-cols-2 gap-4">
      <MetricsCard />
      <WeatherCard />
      <OrderTable />
    </div>
  );
}

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Direct Props

The returned component accepts partial props directly, which merge with agent-provided data: 
<WeatherCard city="Default City" />

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Table Mode

When component is null and columns is provided, mcpComponent renders a default <table>. The tool schema is automatically wrapped in { rows: z.array(schema) }. 
import { mcpComponent } from '@frontmcp/react';
import { z } from 'zod';

const OrderTable = mcpComponent(null, {
  name: 'show_orders',
  description: 'Display order data as a table',
  schema: z.object({
    id: z.string(),
    product: z.string(),
    price: z.number(),
  }),
  columns: [
    { key: 'id', header: 'Order ID' },
    { key: 'product', header: 'Product' },
    { key: 'price', header: 'Price', render: (v) => `$${v}` },
  ],
});

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McpColumnDef

FieldTypeDescription
keystringProperty key in the row object
headerstringColumn header text
render(value) => ReactNodeOptional custom cell renderer

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How Table Mode Works

  1. The agent calls the tool with { rows: [...] }
  2. Each row is validated against the zod schema
  3. The table renders with the specified columns
  4. Custom render functions allow formatting (e.g., currency, dates)

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Legacy Components

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AgentContent

AgentContent is deprecated. Use mcpComponent() instead for type-safe schemas.
A component that registers itself as an MCP tool using raw JSON Schema. 
import { AgentContent } from '@frontmcp/react';

<AgentContent
  name="show_weather"
  description="Display weather data"
  inputSchema={{
    type: 'object',
    properties: {
      city: { type: 'string' },
      temp: { type: 'number' },
    },
  }}
  render={(data) => (
    <div>
      <h2>{String(data.city)}</h2>
      <p>{String(data.temp)}°</p>
    </div>
  )}
  fallback={<p>Waiting for weather data...</p>}
/>

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AgentSearch

AgentSearch is deprecated. Use mcpComponent() with the columns option for table-based result rendering.
A headless search component that registers an MCP tool for search execution. 
import { AgentSearch } from '@frontmcp/react';

<AgentSearch
  toolName="product_search"
  description="Search products"
  placeholder="Search..."
  onResults={(results) => setSearchResults(results)}
/>

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Migration Guide

AgentContent → mcpComponent: 
// Before
<AgentContent
  name="show_weather"
  description="Display weather"
  inputSchema={{ type: 'object', properties: { city: { type: 'string' } } }}
  render={(data) => <div>{String(data.city)}</div>}
  fallback={<p>Loading...</p>}
/>

// After
const WeatherCard = mcpComponent(
  ({ city }) => <div>{city}</div>,
  {
    name: 'show_weather',
    description: 'Display weather',
    schema: z.object({ city: z.string() }),
    fallback: <p>Loading...</p>,
  },
);
// Then use: <WeatherCard />
AgentSearch → mcpComponent table mode: 
// Before
<AgentSearch
  toolName="product_search"
  description="Search products"
  onResults={(results) => setResults(results)}
/>

// After
const ProductTable = mcpComponent(null, {
  name: 'product_search',
  description: 'Search products',
  schema: z.object({ name: z.string(), price: z.number() }),
  columns: [
    { key: 'name', header: 'Product' },
    { key: 'price', header: 'Price', render: (v) => `$${v}` },
  ],
});
// Then use: <ProductTable />