Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Freeagent MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.
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How to integrate Freeagent MCP with Codex
Connect Codex to Freeagent MCP. List overdue invoices for this month, create a new expense for office supplies, and more using natural language, with authentication handled for you.
Oauth2
Freeagent is a cloud-based accounting platform designed for freelancers and small businesses. It simplifies bookkeeping, invoicing, and expense management in one place.
76 Tools
Introduction
Also integrate Freeagent with
Why use Composio?
Apart from a managed and hosted MCP server, you will get:
- CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Large tool responses: Handle them to minimise context rot.
- Dynamic just-in-time access to 20,000 tools across 1500+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.
How to install Freeagent MCP in Codex
Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.
It will initiate the authentication in a browser window, authorize Codex to access your Composio account.
(Optional) Authenticate with OAuth
To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.
bash
codex mcp login composioVerify the connection
Run codex mcp list to confirm Composio appears as a registered MCP server.
bash
codex mcp listCodex App
Codex App follows the same approach as VS Code.
- Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
- Fill the header and Key fields with
{ "x-consumer-api-key" = "ck_*******" }. - The Key is the Composio API key, that you can find on dashboard.composio.dev
- Click on Authenticate and authorize Codex to your Composio account and you're all set.
- Restart and verify if it's there in
.codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }What is the Freeagent MCP server, and what's possible with it?
The Freeagent MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Freeagent account. It provides structured and secure access to your accounting records, so your agent can create invoices, record timeslips, review expenses, monitor cash flow, and track tax deadlines on your behalf.
- Invoices, estimates, and credit notes: Have your agent create invoices, estimates, and credit notes, convert estimates into invoices, or convert eligible invoices into credit notes.
- Financial reporting: Let the agent retrieve cash flow, profit and loss, trial balance, balance sheet, opening balance, and accounting transaction details for your business.
- Expenses, bills, and banking: Direct your agent to list or update expenses, create bills with attachments, review bills and bank transactions, or create and list bank accounts.
- Contacts, projects, and time tracking: Instruct your agent to create contacts and projects, review existing records, and add timeslips for completed work.
- Tax and VAT planning: Have your agent list VAT returns and check your company tax timeline for upcoming events and deadlines.
Conclusion
You've successfully integrated Freeagent with Codex using Composio's MCP server. Now you can interact with Freeagent directly from your terminal, VS Code, or the Codex App using natural language commands.
Key benefits of this setup:
- Seamless integration across CLI, VS Code, and standalone app
- Natural language commands for Freeagent operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1500+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Freeagent operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities
TOOLS
Supported Tools
Every Freeagent action and event your agent gets out of the box.
FRAMEWORKS
How to build Freeagent MCP Agent with another framework
Claude Code
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Claude Cowork
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OpenAI Agents SDK
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Claude Agent SDK
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Grok Bot
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OpenClaw
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Hermes
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Atomic Agent
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Google ADK
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LangChain
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Vercel AI SDK
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Mastra AI
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LlamaIndex
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CrewAI
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Pydantic AI
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AutoGen
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MORE TOOLKITS
Explore Other Toolkits
Stripe
Api KeyOauth2
Stripe is a global online payments platform offering APIs for managing payments, customers, and subscriptions. Trusted by businesses for secure, efficient, and scalable payment processing worldwide.
44API
Api Key
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.
Airwallex
Api Key
Airwallex is a global financial platform providing business accounts, payments, payouts, FX, and cards. Built to simplify cross-border payments and streamline financial operations for businesses.
Aiwyn Tax MCP
No Auth
Aiwyn Tax MCP is a tax estimation service powered by Aiwyn's federal and state tax engine. It helps teams estimate tax outcomes without building tax calculation logic from scratch.
FAQ
Frequently asked questions
With a standalone Freeagent MCP server, the agents and LLMs can only access a fixed set of Freeagent tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Freeagent and many other apps based on the task at hand, all through a single MCP endpoint.
Yes, you can. Codex fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Freeagent tools.
Yes, absolutely. You can configure which Freeagent scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.
All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Freeagent data and credentials are handled as safely as possible.
Start with Freeagent.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Freeagent tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building