The video introduces the potential for developers to profit by selling custom GPT agents on OpenAI's platform.

• Chat GPT has over 100 million daily users just one year after launch.
• Developers can sell custom GPT agents and potentially earn significant income.
• A tiny fraction of the user base paying for a custom agent could result in substantial earnings.

The video explains how simple it is to build and release a custom GPT agent.

• The process involves creating a new agent, providing instructions, and releasing it on the store.
• Due to the low barrier of entry, the marketplace may soon be saturated with low-quality agents.

The potential competition from Google's Bard and the unknown revenue split on the GPT store are discussed.

• Screenshots of Google's Bard were leaked, hinting at a possible marketplace for developers.
• The revenue split on the GPT store could affect profitability.

A range of ideas for custom GPT agents are presented, including their potential functionality.

• Ideas include a smart home controller, a stock broker agent, and a personal trainer agent.
• The ideas range from practical to humorous, highlighting the creative possibilities.

The process of creating a code execution agent for the open source Spellfire library is detailed.

• Firebreather agent can execute JavaScript in a sandboxed environment via Chat GPT actions.
• The API connected to the agent can perform functions users might pay for.

Steps to build an API for a Chat GPT action are outlined, showcasing how to integrate custom functionality.

• An ai-plugin JSON file is added to the well-known directory to describe the API.
• The API must perform a useful task and return a response for the chat.
• An API schema, preferably autogenerated, should be provided in a standardized format.

The video concludes by encouraging viewers to exploit the monetization opportunity presented by custom GPT agents.

• The final encouragement is to deploy the API and begin making a profit from the custom agent.
• The video ends with a reminder to subscribe to the channel for future content.