Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With the Splitwise MCP integration, Codex can create and update expenses, manage groups and friends, comment on expenses, restore deleted expenses, and check notifications, all without leaving the terminal or the app, whichever you prefer.
- UseBuildFeaturesTRIGGERSStart background agents from events across your connected appsFIREWALLNEWBlocks instructions hidden in tool results before your agent reads themINSTANTNEWAudio, video, search, browser and data tools, with no keys to manageOPTIMIZATIONLower cost per completed task with optimised tools and skills
- DOCS
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How to integrate Splitwise MCP with Codex
Connect Codex to Splitwise MCP. Add a new friend using their email, create a dinner expense split equally, and more using natural language, with authentication handled for you.
Oauth2Api Key
Splitwise helps you split bills and expenses with friends and family. It makes it easy to track shared costs and settle up, so everyone stays on the same page.
27 Tools
Introduction
Also integrate Splitwise 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 1700+ 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 Splitwise 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_*******" }Try it
Ask Codex for a Splitwise task. The first time, Composio asks you to connect your Splitwise account.
For example, ask it to:
- "Add a new friend using their email"
- "Create a dinner expense split equally"
- "List all groups I'm part of"
What is the Splitwise MCP server, and what's possible with it?
The Splitwise MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Splitwise account. It provides structured and secure access to your expenses and group data, so your agent can perform actions like creating expenses, adding friends, retrieving categories, and managing your account on your behalf.
- Expense tracking and creation: Quickly have your agent record new expenses, split bills, or log payments—either between you and friends or within groups.
- Friend and contact management: Easily add new friends with their email and name, or remove existing friends to keep your network current.
- Group info and collaboration: Retrieve details about any group you belong to, making it simple to manage shared costs and stay organized with your housemates, travel buddies, or teams.
- Expense category and currency lookup: Ask the agent to fetch available expense categories or supported currencies, helping you record transactions accurately and consistently.
- Account and profile insights: Let your agent pull your current user details so you can quickly review account information or verify profile data as needed.
Conclusion
You've successfully integrated Splitwise with Codex using Composio's MCP server. Now you can interact with Splitwise 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 Splitwise operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1700+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Splitwise operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities
TOOLS
Supported Tools
Every Splitwise action and event your agent gets out of the box.
FRAMEWORKS
How to build Splitwise MCP Agent with another framework
Claude Code
Use Splitwise MCP with Claude Code
Claude Cowork
Use Splitwise MCP with Claude Cowork
OpenAI Agents SDK
Use Splitwise MCP with OpenAI Agents SDK
Claude Agent SDK
Use Splitwise MCP with Claude Agent SDK
OpenClaw
Use Splitwise MCP with OpenClaw
Hermes
Use Splitwise MCP with Hermes
Atomic Agent
Use Splitwise MCP with Atomic Agent
Google ADK
Use Splitwise MCP with Google ADK
LangChain
Use Splitwise MCP with LangChain
Vercel AI SDK
Use Splitwise MCP with Vercel AI SDK
Mastra AI
Use Splitwise MCP with Mastra AI
LlamaIndex
Use Splitwise MCP with LlamaIndex
CrewAI
Use Splitwise MCP with CrewAI
Pydantic AI
Use Splitwise MCP with Pydantic AI
AutoGen
Use Splitwise MCP with AutoGen
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 Splitwise MCP server, the agents and LLMs can only access a fixed set of Splitwise tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Splitwise 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 Splitwise tools.
Yes, absolutely. You can configure which Splitwise 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 Splitwise data and credentials are handled as safely as possible.
Start with Splitwise.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Splitwise 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