# 44API

```json
{
  "name": "44API",
  "slug": "44api",
  "url": "https://composio.dev/toolkits/44api",
  "markdown_url": "https://composio.dev/toolkits/44api.md",
  "logo_url": "https://logos.composio.dev/api/44api",
  "categories": [
    "finance & accounting"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-10-04T14:49:09.507Z"
}
```

![44API logo](https://logos.composio.dev/api/44api)

## Description

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.

## Summary

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.

## Categories

- finance & accounting

## Toolkit Details

- Tools: 4

## Images

- Logo: https://logos.composio.dev/api/44api

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for 44API.
  - Setup:
    - Configure Api Key credentials for 44API.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Validate a customer's EU VAT number
- Look up company details by tax ID
- Add office IP to 44API whitelist

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `44API_ADD_WHITELISTED_IP` | Add Whitelisted IP | Add one IPv4 or IPv6 address to the account whitelist using a verification email address. Requires an Enterprise 44API plan. The request contract is documented, but a successful addition has not been live-verified. |
| `44API_LIST_WHITELISTED_IPS` | List Whitelisted IPs | List IP addresses currently allowed by the account whitelist. This operation requires an Enterprise 44API plan; the API rejects lower-tier accounts. |
| `44API_REMOVE_WHITELISTED_IP` | Remove Whitelisted IP | Remove one IPv4 or IPv6 address from the account whitelist. This destructive operation changes account access controls and requires an Enterprise 44API plan. The shared whitelist endpoint's Enterprise gate was live-verified, but its mutating remove branch was not executed live. |
| `44API_VALIDATE_VAT_NUMBER` | 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. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to 44API
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["44api"])
tools = session.tools()
```

```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();
```

#### Path 1, Step 3: Run 44API tools with your agent

Send a request, execute the 44API tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Validate VAT number DE123456789 and return the available company details"}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```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);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to 44API and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["44api"], mcp=True)
```

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

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["44api"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a 44API request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to 44API tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Validate VAT number DE123456789 and return the available company details")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```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();
```

## Why Use Composio?

### 1. 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

### 2. 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

### 3. 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

### 4. 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

## Use 44API with any AI Agent Framework

Choose a framework you want to connect 44API with:

- [ChatGPT](https://composio.dev/toolkits/44api/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/44api/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/44api/framework/hermes-agent)
- [Atomic Agent](https://composio.dev/toolkits/44api/framework/atomic-agent)

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## Frequently Asked Questions

### Do I need my own developer credentials to use 44API with Composio?

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

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

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

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)