Connect Claude to APIs

For over a year, Superface has been the best way for OpenAI GPT users to connect their custom GPTs to APIs. Today, we are happy to announce that Superface now also brings the same connectivity to Anthropic Claude users!

With Superface, you can now use Claude with popular 3rd-party applications like Google Calendar, Google Sheets or Todoist and chain them into powerful workflows! For instance, you can query last week’s stock prices using Marketstack and then create a Google spreadsheet with this information.

Getting started

Let’s take a look at how to get an example working in your Claude! In order to connect Claude to APIs, you will need to download and use the Claude desktop application. Currently, the process involves opening a code(text) editor as well as making sure Node.js is available on your computer. We have prepared a detailed documentation of the setup process which I won’t be covering in this article.

With the Claude application installed and running, sign up for a free Superface account and navigate to “Connect Claude”. This page includes the necessary information to set up your Claude application in order to work with external tools. Before continuing, please make sure to

1. Edit the configuration file on your computer and add the Superface MCP server configuration.

2. Install (if not already installed) Node.js on your computer.

With configuration saved and Node.js installed, restart your Claude application.

Back in Superface, navigate to Claude > Manage tools, look up Marketstack, and click “Add”. Then, add Google Sheets as well

Note, for this demo to work, you will need your own Marketstack API key, which you can get for free from the Marktestack dashboard.

With the configuration saved, Node.js installed, and tools added, restart your Claude application.

Now, it is time to get the closing prices. In the Claude application, run the query "List Apple and Microsoft closing prices for the last week.”

When you sign in with your Google account, you can then follow up on this query and create a new Google sheet with the prices: “create a new Google sheet with these data.”

Upon this query completion, head over to the Google sheets and check out the result:

Of course, this is just an example, and the actual possibilities are endless! Superface comes with dozens of tools that are ready to use from the Claude application, and you can easily add new ones, including your own internal services, as long as they have APIs.

Model Context Protocol MCP

Technically, bringing the Superface intelligent tooling is possible thanks to the Anthropic Model Context Protocol, or MCP: their own protocol for connecting AI assistants to APIs. We were excited to see this initiative as AI agents are only as good as the actions they can take. While the MCP has still a way to go before it can be widely adopted, it makes it possible for Claude to connect to APIs.

If you are a developer building an MCP client, you can connect it to APIs via Superface in no time. You can find more details in our MCP server implementation that is also used to power the Claude application on Superface GitHub.

Whether you are building your AI solution using MCP or using MCP or using the Claude desktop application, let us know! We will be happy to assist you in incorporating agentic actions in your workflows!