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How to connect Billsby to Claude

Connect Claude Web, Desktop and Cowork to Billsby MCP. List active subscriptions expiring this month, find overdue invoices by customer, and more using natural language, with authentication handled for you.

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Billsby is a subscription billing platform for managing customers, subscriptions, invoices, products, plans, usage counters, add-ons, and allowances. It helps SaaS and subscription teams automate billing operations without building complex billing logic from scratch.

10 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Billsby account to Claude via Composio Connect, enabling it to list active subscriptions expiring this month, find overdue invoices by customer, update allowance for enterprise plan, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

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Connecting Billsby to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Billsby account

Back in Claude, ask it to connect to Billsby or give it any Billsby-related task.

For example, ask Claude to:

  • "List active subscriptions expiring this month"
  • "Find overdue invoices by customer"
  • "Update allowance for enterprise plan"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Billsby account is ready to use.

What is the Billsby Claude Connector, and what's possible with it?

The Billsby MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Billsby account. It provides structured and secure access so your agent can perform Billsby operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for Billsby?

The connector can show as connected, but Claude must use it in each Billsby conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Billsby again.

2. Why does Claude show an MCP server error before Billsby connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Billsby.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Billsby.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Billsby authorization link not work?

The Composio connector is one server. Your Billsby account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Billsby connection.
  • Composio creates a fresh Billsby authorization link.
  • Open that link in your browser and finish the Billsby sign-in.

4. Why do Billsby actions fail after they worked before?

The Billsby connection can expire or lose permission.

  • Ask Claude to inspect the Billsby connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Billsby account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Billsby.
  • If the action still fails with a permission error, check that the connected account has that permission in Billsby itself.

5. How do I switch to a different Billsby account?

Claude can manage the Billsby connection for you.

  • Ask Claude to disconnect or delete the current Billsby account.
  • Ask Claude to connect Billsby again.
  • Open the new Composio authorization link for Billsby.
  • Sign in with the other Billsby account in the browser.
  • After the account connects, ask Claude to retry the Billsby task.

6. Why is my Billsby connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Billsby connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Billsby tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Billsby.
TOOLS

Supported Tools

Every Billsby action and event your agent gets out of the box.

Create Customer

Create a Billsby customer without a subscription or payment card.

Get Customer

Get billing, contact, payment-status, and account details for one Billsby customer.

Get Subscription

Get billing schedule, customer, product, plan, pricing, status, and revenue details for one Billsby subscription.

Get Subscription Shipping Address

Get the shipping address associated with one Billsby subscription.

List Customers

Return one page of customers for the connected Billsby company, optionally filtered by a partial customer name.

List Customer Subscriptions

List all subscriptions belonging to one Billsby customer.

List Product Plans

List the plans and billing cycles configured for one Billsby product.

List Products

Return one page of Billsby products, optionally filtered by name or visibility.

List Subscriptions

Return one page of company subscriptions with optional status, trial, product, plan, and ordering filters.

Update Customer

Replace the editable contact and billing-address details for an existing Billsby customer.

FRAMEWORKS

How to build Billsby MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Billsby MCP with ChatGPT

Hermes logo

Hermes

Use Billsby MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Billsby MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Billsby MCP server, the agents and LLMs can only access a fixed set of Billsby tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Billsby and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork 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 Billsby tools.

Yes, absolutely. You can configure which Billsby 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 Billsby data and credentials are handled as safely as possible.

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