How to integrate Moderation API MCP with Claude Agent SDK

This guide walks you through connecting Moderation API to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Moderation API agent that can review flagged content, approve safe posts, block repeat offenders, and manage your wordlists through natural language commands. This guide will help you understand how to give your Claude Agent SDK agent real control over a Moderation API account through Composio's Moderation API MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Moderation API is a content safety service for detection, human review, author management, and moderation actions. Use it to keep user-generated content safer with clear workflows and audit-ready decisions.

11 Tools

Introduction

This guide walks you through connecting Moderation API to the Claude Agent SDK using the Composio tool router. By the end, you'll have a working Moderation API agent that can review flagged content, approve safe posts, block repeat offenders, and manage your wordlists through natural language commands.

This guide will help you understand how to give your Claude Agent SDK agent real control over a Moderation API account through Composio's Moderation API MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

Also integrate Moderation API with

OpenAI Agents SDKClaude CodeClaude CoworkCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

TL;DR

Here's what you'll learn:
  • Get and set up your Claude/Anthropic and Composio API keys
  • Install the necessary dependencies
  • Initialize Composio and create a Tool Router session for Moderation API
  • Configure an AI agent that can use Moderation API as a tool
  • Run a live chat session where you can ask the agent to perform Moderation API operations

What is Claude Agent SDK?

The Claude Agent SDK is Anthropic's official framework for building AI agents powered by Claude. It provides a streamlined interface for creating agents with MCP tool support and conversation management.

Key features include:

  • Native MCP Support: Built-in support for Model Context Protocol servers
  • Permission Modes: Control tool execution permissions
  • Streaming Responses: Real-time response streaming for interactive applications
  • Context Manager: Clean async context management for sessions

What is the Moderation API MCP server, and what's possible with it?

The Moderation API MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Moderation API account. It provides structured and secure access to your moderation workflows, review queues, actions, and wordlists, so your agent can evaluate content, submit items for review, inspect queues, resolve reviewed items, and apply moderation actions on your behalf.

  • Content policy evaluation: Have your agent evaluate content without storing it, then report policy findings and the recommended moderation action.
  • Content submission and review: Let the agent submit content for moderation so it can be retained and added to a review queue based on your project settings.
  • Review queue management: Direct your agent to check queue totals, list and filter moderation items, and mark reviewed items as resolved or pending.
  • Moderation action execution: Instruct your agent to view available moderation actions and apply the appropriate action to content or authors.
  • Wordlist management: Have your agent list wordlists, inspect their current words, and add or remove terms from an existing wordlist.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Composio API Key and Claude/Anthropic API Key
  • Primary know-how of Claude Agents SDK
  • A Moderation API account
  • Some knowledge of Python
2

Getting API Keys for Claude/Anthropic and Composio

Claude/Anthropic API Key
  • Go to the Anthropic Console and create an API key. You'll need credits to use the models.
  • Keep the API key safe.
Composio API Key
  • Log in to the Composio dashboard.
  • Navigate to your API settings and generate a new API key.
  • Store this key securely as you'll need it for authentication.
3

Install dependencies

npm install @anthropic-ai/claude-agent-sdk @composio/core dotenv

Install the Composio SDK and the Claude Agents SDK.

What's happening:

  • @composio/core provides Composio integration for Anthropic
  • @anthropic-ai/claude-agent-sdk is the core agent framework
  • dotenv/config loads environment variables
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here
ANTHROPIC_API_KEY=your_anthropic_api_key_here

Create a .env file in your project root.

What's happening:

  • COMPOSIO_API_KEY authenticates with Composio
  • USER_ID identifies the user for session management
  • ANTHROPIC_API_KEY authenticates with Anthropic/Claude
5

Import dependencies

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

dotenv.config();
What's happening:
  • We're importing all necessary libraries including the Claude Agent SDK and Composio
  • The dotenv.config() function loads environment variables from your .env file
  • This setup prepares the foundation for connecting Claude with Moderation API functionality
6

Create a Composio instance and Tool Router session

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });

  // Create Tool Router session for Moderation API
  const session = await composio.create(USER_ID, {
    toolkits: ['moderationapi'],
  });
  const mcpUrl = session?.mcp.url;
What's happening:
  • The function checks for the required COMPOSIO_API_KEY environment variable
  • We're creating a Composio instance using our API key
  • The create method creates a Tool Router session for Moderation API
  • The returned url is the MCP server URL that your agent will use
7

Configure Claude Agent with MCP

const options: Options = {
  permissionMode: 'bypassPermissions',
  mcpServers: {
    composio: {
      type: 'http',
      url: mcpUrl,
      headers: { 'x-api-key': COMPOSIO_API_KEY }
    }
  },
  systemPrompt: 'You are a helpful assistant with access to Moderation API tools via Composio.',
  maxTurns: 10,
};
What's happening:
  • We're configuring the Claude Agent options with the MCP server URL
  • permissionMode: 'bypassPermissions' allows the agent to execute operations without asking for permission each time
  • The system prompt instructs the agent that it has access to Moderation API
  • maxTurns: 10 limits the conversation length to prevent excessive API usage
8

Create client and start chat loop

const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}
What's happening:
  • The readline interface is created to handle user input and output
  • The query function is used to send the user's input to the agent
  • The chat loop continues until the user types 'exit' or 'quit'
9

Run the application

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}
What's happening:
  • The chat function is the entry point for the application
  • The try-catch block is used to handle any errors that occur

Complete Code

Here's the complete code to get you started with Moderation API and Claude Agent SDK:

import 'dotenv/config';
import readline from 'node:readline';
import { Composio } from '@composio/core';
import { query, type Options } from "@anthropic-ai/claude-agent-sdk";

async function chat() {
  const { COMPOSIO_API_KEY, USER_ID } = process.env;
  if (!COMPOSIO_API_KEY || !USER_ID) {
    throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
  }

  const composio = new Composio({ apiKey: COMPOSIO_API_KEY });
  const session = await composio.create(USER_ID, {
    toolkits: ['moderationapi']
  });
  const mcp_url = session?.mcp.url;

  const options: Options = {
    permissionMode: 'bypassPermissions',
    mcpServers: {
      composio: {
        type: 'http',
        url: mcp_url,
        headers: { 'x-api-key': COMPOSIO_API_KEY }
      }
    },
    systemPrompt: 'You are a helpful assistant with access to Moderation API tools via Composio.',
    maxTurns: 10,
  };

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prompt: 'You: '
  });

  console.log('\nChat started. Type "exit" to quit.\n');

  let isProcessing = false;

  async function ask(prompt: string) {
    isProcessing = true;
    rl.pause();

    process.stdout.write('Claude is thinking...');
    const stream = query({ prompt, options });

    let firstChunk = true;
    for await (const msg of stream) {
      const content = (msg as any).message?.content || (msg as any).content;
      if (Array.isArray(content)) {
        for (const block of content) {
          if (block.type === 'text' && block.text) {
            if (firstChunk) {
              process.stdout.write('\r\x1b[K');
              process.stdout.write('Claude: ');
              firstChunk = false;
            }
            process.stdout.write(block.text);
          }
        }
      }
    }
    process.stdout.write('\n\n');

    isProcessing = false;
    rl.resume();
    rl.prompt();
  }

  rl.on('line', async (line) => {
    if (isProcessing) return;

    const input = line.trim();
    if (input === 'exit') {
      rl.close();
      process.exit(0);
    }
    if (input) await ask(input);
    else rl.prompt();
  });

  await ask('What can you help me with?');
}

try {
  await chat();
} catch (error) {
  console.error(error);
  process.exit(1);
}

Conclusion

You've successfully built a Claude Agent SDK agent that can interact with Moderation API through Composio's Tool Router.

Key features:

  • Native MCP support through Claude's agent framework
  • Streaming responses for real-time interaction
  • Permission bypass for smooth automated workflows
You can extend this by adding more toolkits, implementing custom business logic, or building a web interface around the agent.
TOOLS

Supported Tools

Every Moderation API action and event your agent gets out of the box.

Evaluate Content Without Storage

Evaluate content without retaining it or adding it to a review queue, and return policy findings and the recommended moderation action.

Execute Moderation Action

Apply a discovered moderation action to content items or authors.

Get Account and Quota

Return the connected Moderation API account, plan, current project, and current quota values.

Get Review Queue

Return metadata and item counts for a review queue by ID.

Get Wordlist

Return one wordlist and its current words by ID.

List Moderation Actions

List moderation actions available to the organization, optionally restricted to a review queue.

List Review Queue Items

List and filter one page of moderation items in a review queue.

List Wordlists

List the organization's wordlists and their identifiers.

Modify Wordlist Words

Add words to or remove words from an existing wordlist.

Set Review Queue Item Status

Mark a review queue item resolved or return it to pending.

Submit Content for Moderation

Evaluate content and allow Moderation API to retain it and add it to a review queue according to the project's configuration.

FRAMEWORKS

How to build Moderation API MCP Agent with another framework

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OpenAI Agents SDK

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Claude Code logo

Claude Code

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Claude Cowork logo

Claude Cowork

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Codex logo

Codex

Use Moderation API MCP with Codex

OpenClaw logo

OpenClaw

Use Moderation API MCP with OpenClaw

Hermes logo

Hermes

Use Moderation API MCP with Hermes

CLI logo

CLI

Use Moderation API MCP with CLI

Google ADK logo

Google ADK

Use Moderation API MCP with Google ADK

LangChain logo

LangChain

Use Moderation API MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Moderation API MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Moderation API MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Moderation API MCP with LlamaIndex

CrewAI logo

CrewAI

Use Moderation API MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Moderation API MCP server, the agents and LLMs can only access a fixed set of Moderation API tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Moderation API and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Agent SDK fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Moderation API tools.

Yes, absolutely. You can configure which Moderation API scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Moderation API data and credentials are handled as safely as possible.

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