composio-anthropic
Adapts Composio tools to the Claude Messages API tool format and executes the tool calls Claude returns.
Installation
pip install composio composio-anthropic anthropic
Set COMPOSIO_API_KEY (create one at https://dashboard.composio.dev/settings) and ANTHROPIC_API_KEY in your environment.
Quickstart
AnthropicProvider is non-agentic: Claude returns tool_use blocks, handle_tool_calls executes them, and you send the results back as tool_result blocks.
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 john@example.com 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(session=session, 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)
handle_tool_calls extracts every tool_use block from the response, executes the matching Composio tools through the supplied session, and returns the raw results in order. Pass user_id instead for tools fetched with tools.get(). Claude occasionally emits tool input as a JSON string instead of an object; the provider normalizes this before execution.
Building on the Claude Agent SDK instead of the Messages API? Use composio-claude-agent-sdk.
Links
- Anthropic provider docs: https://docs.composio.dev/docs/providers/anthropic
- Composio docs: https://docs.composio.dev
Metadata
Release files for composio-anthropic 0.28.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| composio_anthropic-0.28.0.tar.gz | 5.6 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| composio_anthropic-0.28.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 10.7 kB
Release files / composio_anthropic-0.28.0.tar.gz
| Download URL | composio_anthropic-0.28.0.tar.gz |
|---|---|
| Size | 5.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
334eae4f3dc2db4f214c3984c931c6f31733a0bd26eb9498b7266a4419f6cfa5
|
|
BLAKE2b-256 checksum How to use checksums |
87014d49d9f7aae98346192c01ceaef36958e58ed904b1cd3e2f19a304d43e24
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Release files / composio_anthropic-0.28.0-py3-none-any.whl
| Download URL | composio_anthropic-0.28.0-py3-none-any.whl |
|---|---|
| Size | 5.1 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
32bbe6fee75b0ce91097b03005d2649dbc8b3f12714c4063a19f89fb3c354643
|
|
BLAKE2b-256 checksum How to use checksums |
c720de480382f6ba67e774c0beefc19e27178d3556660feea97a0b2c2aafbbd0
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
