Charter · Office #43,881

What it is

Calls itself “Python library”.

• Calls itself: Python library

“Charter is an open-source Python library for building agent tools from API declarations.”

Where it puts itself

Positions itself as an alternative to Composio. Rules out “third-party server”.

• Alternative to: Composio
• Says it will not: third-party server

“A library, not a service.”

“Open-source Composio alternative for AI agents”

What it costs

No free plan.

• Free plan: no

“No proxy, no per-call pricing, no telemetry.”

Who it sells to

Sells to developers. Built for small businesses. In Python.

• Sells to: developers
• Company size: small businesses
• Languages: Python

“A Python library that turns any API into an agent tool you own.”

“A SaaS adding an agent that works in your users' Gmail, Stripe or Notion”

How it runs

A API. Runs locally and works offline. Distributed through the npm. Offers an API. Open source. AI is the core of the product. You can bring your own API key.

• Kind: api
• Runs where: on the device, offline
• Distributed via: npm
• API: yes
• Open source: yes
• AI role: core to the product
• Bring your own key: yes

“Charter is an open-source Python library for building agent tools from API declarations.”

“Runs in your process. No proxy, no per-call pricing, no telemetry.”

What it works with

Integrates with CharterMiddleware, LangChain, MCP and 1 more. Replaces Composio. Built on Python. Names Zapier on its pages.

• Integrates with: CharterMiddleware · LangChain · MCP · +1
• Replaces: Composio
• Built on: Python
• Names: Zapier

“CharterMiddleware adds a session to a LangChain agent”

“Open-source Composio alternative for AI agents”

What it offers as proof

Live, no waitlist. Publishes docs.

“…docs -> https://github.com/r28ai/charter/tree/main/docs”