Connect Claude Code

Claude Code connects to remote MCP servers over HTTP. Once added, Claude can publish files it reads or writes in your project and reply with the link.

1. Create an API key

   Open Dashboard → API keys, create a key named “Claude Code” and copy it. It starts with lis_.

2. Add the server

   Run this in your terminal, with your key in place of the placeholder:

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   claude mcp add --transport http linkinseconds https://linkinseconds.com/api/mcp \
     --header "Authorization: Bearer lis_YOUR_KEY"

   Add --scope user to make it available in every project, or --scope project to share it with your team through a .mcp.json file (then keep the key out of that file, see below).

3. Check it is connected

   Start Claude Code and run /mcp. You should see linkinseconds as connected, with six tools.

4. Ask for a link

   For example:

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   > Turn notes.md into a clean HTML page and publish it as a link

   Claude writes the page, calls upload_file and replies with something like:

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   Published: https://linkinseconds.com/p/notes-k3

Big files#

For files over 3 MB, Claude calls create_upload_url, uploads the file with curl from your terminal (you will be asked to approve the command), then calls finish_upload. Nothing extra to configure.

Keep the key out of shared files#

With project scope, the server is saved in .mcp.json in your repo. Claude Code expands environment variables in that file, so commit a reference instead of the key:

{
  "mcpServers": {
    "linkinseconds": {
      "type": "http",
      "url": "https://linkinseconds.com/api/mcp",
      "headers": { "Authorization": "Bearer ${LIS_API_KEY}" }
    }
  }
}

Each teammate then sets their own key:

export LIS_API_KEY="lis_..."

Remove it#

claude mcp remove linkinseconds