ChatGPT

1. What do I need before I start?#

Sign in to First100 and choose a plan for the work you want your agent to do. Connect your social accounts before publishing; research does not require a social connection.

This setup uses browser sign-in. You will approve access to your First100 account without copying an API key.

2. How do I add First100 to ChatGPT?#

You need a paid ChatGPT plan (Plus, Pro, Business, Enterprise or Edu); the free tier cannot add custom servers. First turn on Developer mode: Settings → Plugins → Developer mode. Then open the sidebar, go to the home page, click Plugins, and click the plus icon next to the plugin search to add a custom server. Name it First100, paste the server URL below, choose OAuth, and complete the First100 sign-in and approval. In a new chat, enable First100 from the plugins menu. Developer mode exposes the full tool set, including publishing. If the plus icon is missing, Developer mode is off or the plan does not allow it.

https://firsthundred.app/api/mcp

For app-specific settings and version differences, see the official setup reference.

3. How do I check the connection?#

Use First100 to check my account status and list my connected accounts.

The response should show your actual First100 plan and connected platforms. If tools do not appear, enable First100 for the active conversation and reload your client. If access is rejected, reconnect or update your key. See connection help if the issue continues.

4. What should I ask first?#

Tell your agent what you built, who it is for, and the outcome you want. Start with research or a draft, then review the next action together.

I’m launching a tool for independent founders. Use First100 to find relevant communities and help me prepare a launch post. Show me the draft before publishing.

Explore what your agent can do for more ideas. Agents reading this page can use the agent guide for discovery and working instructions.