44API MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with 44API MCP or direct API to validate VAT numbers, verify tax identifiers, fetch company details, and manage IP whitelists through natural language.

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Api Key

44API is an API service for validating VAT and tax identifiers and returning company details. Use it to verify business tax data and manage account IP whitelists quickly.

4 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

Every 44API action and event your agent gets out of the box.

Add Whitelisted IP

Add one IPv4 or IPv6 address to the account whitelist using a verification email address.

List Whitelisted IPs

List IP addresses currently allowed by the account whitelist.

Remove Whitelisted IP

Remove one IPv4 or IPv6 address from the account whitelist.

Validate VAT Number

Validate one VAT or tax ID for a supported country and return its validity plus any company details available on the connected plan.

SETUP GUIDE

Connect 44API MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["44api"],
  mcp: true,
});
Create a session scoped to 44API and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Validate VAT number DE123456789 and return the available company details",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a 44API request
SETUP GUIDE

Connect 44API API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["44api"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to 44API
3

Run 44API tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Validate VAT number DE123456789 and return the available company details" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the 44API tool calls through the session, and print the final answer

Why Use Composio?

AI Native 44API Integration

  • Supports both 44API MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable VAT and tax ID validation
  • Rich coverage for checking identifiers, reading company details, and managing 44API account IP whitelists

Managed Auth

  • Secure API key handling without hard-coding 44API credentials in your agent code
  • Central place to manage, scope, and revoke 44API access
  • Per user and per environment credentials so test and production workflows stay clean

Agent Optimized Design

  • Tools are tuned for AI agents, so VAT checks and company lookups are easier for models to call correctly
  • Clear tool inputs and outputs help agents ask for missing tax IDs, countries, or whitelist IPs when needed
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access 44API
  • Scoped, least privilege access for tax validation and IP whitelist actions
  • Full audit trail of agent actions to support finance, compliance, and security reviews
FAQ

Frequently asked questions

Yes, 44API requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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