The option is available only for Standard, Business and Premium accounts. Click here if you want to choose a different subscription.

Connect Claude.ai to online-billing-service.com and put artificial intelligence to work:

• To generate useful reports on all kinds of topics: sales, payments received, expenses, clients, suppliers, services, products and so on.
• To add, change or delete invoices straight from Claude.ai.
• To get an AI's overview of how your business is doing.

How you connect Claude.ai to online-billing-service.com

In your online-billing-service.com account

Click your user name → Integrated services → Claude.ai

Click the Enable the integration button.

A set of "keys" is generated — these are what the Claude.ai connector needs.

In your Claude.ai account

Note: on the free Claude plan you can add a single connector, and the number of prompts available to you is limited.

Click your user name → Settings

Click Connectors.

Click Add custom connector.

Fill in the form with the keys generated in the previous step:

• In Name, type online-billing-service.com
• In Remote MCP server URL, paste the URL MCP
• Click Advanced settings — two more fields open up:
  • In OAuth Client ID, paste the Client ID
  • In OAuth Client Secret, paste the Client Secret
• Finally, click Add

Careful: the two OAuth fields stay hidden until you click Advanced settings. If you save the connector without them, Claude.ai will not be able to connect to your account.

Click Connect. You will be asked to sign in to your online-billing-service.com account and to authorize the connection.

Now you can ask Claude to help you with reports and analyses based on the data in your online-billing-service.com account. Each prompt may ask you for one more confirmation.

Changed your mind? You can disable the integration whenever you want.

Common problems

"Automatic client registration isn't supported by…"

This error shows up when the connector was saved in Claude.ai without the OAuth keys. Claude.ai tried to generate a key for itself, and online-billing-service.com does not allow that — the keys are always generated from your own account, so that nobody else can ask for access to your data.

To repair the connection:

• In online-billing-service.com, click your user name → Integrated services → Claude.ai and copy the Client ID and the URL MCP.
• In Claude.ai, open the connector, click Advanced settings and fill in OAuth Client ID and OAuth Client Secret.
• Save, then click Connect.

I no longer have the Client Secret

For security reasons the Client Secret is shown only once, when it is generated, and it cannot be recovered afterwards. If you have lost it, click Regenerate credentials on the integration page and use the new pair of keys. The old ones stop working, so you will need to update the connector in Claude.ai.