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Free Custom GPT Migration Checker and Bundle Builder

How to Migrate Custom GPT Actions and API Calls

Inventory every Action endpoint, authentication method and webhook before you rebuild.

By the GPT Migration Editorial TeamPublished October 18, 20261 min read

In this guide

Actions are where most migrations break, because they depend on endpoints, schemas and authentication.

Inventory

  1. Open the Action's schema and copy it into the checker.
  2. Note each endpoint, server URL and authentication type.
  3. Write down which instruction lines tell the GPT when to call each one.

Rebuild

OpenAI's FAQ does not settle every Actions question for plugins, so test each call in the new setup. OAuth connections usually need re-authorizing. If you want a second pair of eyes, request an audit.

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