--- title: Fetch Extension description: Add Fetch MCP Server as a goose Extension --- import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; import YouTubeShortEmbed from '@site/src/components/YouTubeShortEmbed'; import GooseDesktopInstaller from '@site/src/components/GooseDesktopInstaller'; import CLIExtensionInstructions from '@site/src/components/CLIExtensionInstructions'; :::warning Known Limitation The Fetch extension [does not work](https://github.com/aaif-goose/goose/issues/1184) with Google models (e.g. gemini-2.0-flash) because this extension uses `format: uri` in its JSON schema which Google doesn't support. ::: This tutorial covers how to add the [Fetch MCP Server](https://github.com/modelcontextprotocol/servers/tree/main/src/fetch) as a goose extension to retrieve and process content from the web. :::tip Quick Install [Launch the installer](goose://extension?cmd=uvx&arg=mcp-server-fetch&id=fetch&name=Fetch&description=Web%20content%20fetching%20and%20processing%20capabilities) **Command** ```sh uvx mcp-server-fetch ``` ::: ## Configuration :::info Note that you'll need [uv](https://docs.astral.sh/uv/#installation) installed on your system to run this command, as it uses `uvx`. ::: ## Example Usage Let's use the Fetch extension to get random programming jokes from the [Official Joke API](https://official-joke-api.appspot.com/random_joke). :::info While this API does not require an API key, many APIs do. If you need to provide an API key, you can set it as an environment variable and tell goose its name. Example: _"get tomorrow's weather for New Orleans from the weatherapi. Don't use the key directly but instead use a script that gets the value from the env var WEATHER_API_KEY"_ ::: ### goose Prompt ``` make a web page that tells jokes for programmers. The page should ask the user the setup of the joke, allow them to guess the punchline and then tell them if they are right or wrong. Include a button that allows them to request another joke. you can fetch the jokes from the official joke api ``` ### goose Output ``` I'll help you create a web page that uses the Official Joke API to display programming jokes. I'll break this down into steps: First, let's verify the API endpoint and see what kind of data we get Then create an HTML file with the necessary structure Add JavaScript to handle the interactions Let me check the API first: FETCH url: https://official-joke-api.appspot.com/jokes/programming/random Output Content type application/json; charset=utf-8 cannot be simplified to markdown, but here is the raw content: Contents of https://official-joke-api.appspot.com/jokes/programming/random: [{"type":"programming","setup":"A SQL query walks into a bar, walks up to two tables and asks...","punchline":"'Can I join you?'","id":23}] Perfect! Now I'll create an HTML file with the necessary structure and JavaScript code: TEXT_EDITOR command: write file_text: Programmer Jokes

Programmer Jokes

Loading joke...

```