Providers

Anthropic Provider

Use Composio tools with Claude

The Anthropic Provider transforms Composio tools into a format compatible with Anthropic's function calling capabilities through its Messages API.

Setup

The Anthropic provider can be installed for both SDKs.

pip install composio composio-anthropic
npm install @composio/anthropic @anthropic-ai/sdk

You can specify the provider in the constructor. The constructor also takes in an optional cacheTools parameter.

import anthropic

from composio import Composio
from composio_anthropic import AnthropicProvider

# Initialize tools.
anthropic_client = anthropic.Anthropic()
composio = Composio(provider=AnthropicProvider())
import { Composio } from "@composio/core";
import { AnthropicProvider } from "@composio/anthropic";
import Anthropic from '@anthropic-ai/sdk';

const composio = new Composio({
  provider: new AnthropicProvider({
    cacheTools: false,  // default
  }),
});

const anthropic = new Anthropic();

Usage

# Define your user ID
user_id = "your-user-id"

# Get GitHub tool for listing stargazers
tools = composio.tools.get(user_id=user_id, tools=["GITHUB_LIST_STARGAZERS"])

# Get response from the LLM
response = anthropic_client.messages.create(
    model="claude-sonnet-4-5",
    max_tokens=1024,
    tools=tools,
    messages=[
        {"role": "user", "content": "List my github stargazers. for the repo composiohq/composio"},
    ],
)

# Execute the function calls.
result = composio.provider.handle_tool_calls(user_id=user_id, response=response)
print(result)
const userId = "your-user-id";
const tools = await composio.tools.get(userId, {
  tools: ["GITHUB_LIST_STARGAZERS"]
})

const msg = await anthropic.messages.create({
  model: "claude-sonnet-4-5",
  messages: [
    {
      role: "user",
      content: "List my github stargazers. for the repo composiohq/composio",
    },
  ],
  tools: tools,
  max_tokens: 1000,
});

const res = await composio.provider.handleToolCalls(userId, msg);

console.log(res[0].content);

Modifiers

Modifiers are functions that can be used to intercept and optionally modify the schema, the tool call request and the response from the tool call.

Anthropic provider modifiers are the standard framework modifiers. Read more here: Modifying tool schemas.

On this page

SetupUsageModifiers