Anthropic - Composio

The Anthropic Provider transforms Composio tools into a format compatible with the Claude Messages API.

<Callout type="info"> Looking for the Claude Agent SDK? See the [Claude Agent SDK](/docs/providers/claude-agent-sdk) provider page. </Callout> <Steps> <Step> **Install**

bash

pip install composio composio_anthropic anthropic

</Tab> <Tab value="TypeScript"> ```bash npm install @composio/core @composio/anthropic @anthropic-ai/sdk ``` </Tab> </Tabs> </Step> <Step> **Configure API Keys** <Callout type="info"> Set `COMPOSIO_API_KEY` with your API key from [Settings](https://platform.composio.dev/?next_page=/settings) and `ANTHROPIC_API_KEY` with your [Anthropic API key](https://console.anthropic.com/settings/keys). </Callout>

txt

COMPOSIO_API_KEY=xxxxxxxxx
ANTHROPIC_API_KEY=xxxxxxxxx

</Step> <Step> **Create session and run**

python

import json
import anthropic
from composio import Composio
from composio_anthropic import AnthropicProvider

composio = Composio(provider=AnthropicProvider())
client = anthropic.Anthropic()

# Create a session for your user
session = composio.create(user_id="user_123")
tools = session.tools()

messages = [
    {"role": "user", "content": "Send an email to [email protected] with the subject 'Hello' and body 'Hello from Composio!'"}
]

response = client.messages.create(
    model="claude-opus-4-6",
    max_tokens=4096,
    tools=tools,
    messages=messages,
)

# Agentic loop — keep executing tool calls until the model responds with text
while response.stop_reason == "tool_use":
    tool_use_blocks = [block for block in response.content if block.type == "tool_use"]
    results = composio.provider.handle_tool_calls(user_id="user_123", response=response)
    messages.append({"role": "assistant", "content": response.content})
    messages.append({
        "role": "user",
        "content": [
            {"type": "tool_result", "tool_use_id": tool_use_blocks[i].id, "content": json.dumps(result)}
            for i, result in enumerate(results)
        ]
    })
    response = client.messages.create(
        model="claude-opus-4-6",
        max_tokens=4096,
        tools=tools,
        messages=messages,
    )

# Print final response
for block in response.content:
    if block.type == "text":
        print(block.text)

</Tab> <Tab value="TypeScript"> ```typescript import Anthropic from '@anthropic-ai/sdk'; import { Composio } from '@composio/core'; import { AnthropicProvider } from '@composio/anthropic';

const composio = new Composio({ provider: new AnthropicProvider(), }); const client = new Anthropic();

// Create a session for your user const session = await composio.create("user_123"); const tools = await session.tools();

const messages: Anthropic.MessageParam[] = [ { role: "user", content: "Send an email to [email protected] with the subject 'Hello' and body 'Hello from Composio!'" }, ];

let response = await client.messages.create({ model: "claude-opus-4-6", max_tokens: 4096, tools: tools, messages: messages, });

// Agentic loop — keep executing tool calls until the model responds with text while (response.stop_reason === "tool_use") { const toolResults = await composio.provider.handleToolCalls("user_123", response); messages.push({ role: "assistant", content: response.content }); messages.push(...toolResults); response = await client.messages.create({ model: "claude-opus-4-6", max_tokens: 4096, tools: tools, messages: messages, }); }

// Print final response for (const block of response.content) { if (block.type === "text") { console.log(block.text); } }

</Tab>
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