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AI Agent

Build custom plugins without writing any code.

Written by Ryan Kulp
Updated today

Writing code is cool, but wouldn't it be cooler to type "build me a plugin showing populations around the world" and it Just Worked?
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Now you can.

Requirements

This feature is in public beta.

Agent currently requires an API Key from Anthropic, creators of the popular Claude LLMs. You can load credits on their billing portal.

In the near future you'll be able to purchase credits directly from TRMNL.

Quickstart

  1. Visit your TRMNL Account

  2. Toggle Agent on the left side, click Save

  3. Paste an Anthropic API Key on the left side, click Save

  4. Visit Plugins > Private Plugins > New, provide a name and click Save

  5. Click Edit Markup, then click the Agent tab

  6. Ask Agent to build whatever you want

How it works

TRMNL has developed a set of agentic coding "skills," written in plain English, which describe our platform's capabilities and design patterns in depth.

Whenever you interface with the Agent inside our private plugin interface, Claude is given access to this context.
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In addition, the agent has been given access to a range of tools, including markup editing, settings updates, data refreshing, internet search, and a list of API endpoints to name a few.

MCP Server (Advanced)

To develop TRMNL plugins within your local development environment, create an MCP API Key instead from your private plugin's settings page, located on the right side after clicking Save.

Provide this key to your desktop agent for a more customizable experience with your local tooling.
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Frequently Asked Questions

Which model does this feature use?

Claude Sonnet 4.6.

How much does it cost to build a plugin?

We're seeing an average of $1-3 per plugin.

To make this guide we created a plugin with a single sentence prompt: make a daily deal plugin for meh.com. after thinking and developing for a couple minutes, Agent required us to provide a free Meh.com API Key, then we requested that the daily deal item's image be included. Total cost: $2.20 USD.

Can I publish plugins with this feature?

Not currently. Our team reviews several plugin submissions per day and we need to scale internal tools before we can handle the inevitable Agent-driven volume bump.

Will other models be available?

Yes, soon we'll provide a dropdown with options to switch between LLMs and their underlying models.

Troubleshooting

Agent isn't perfect. Send us a live chat or email [email protected] if (when) you discover bugs or quirks.

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