Free Tool

ChatGPT Plugin Readiness Checker

Nine questions about your product. Three fixed rules. A plain answer on whether a ChatGPT plugin is worth building, with the reason behind every line.

How the verdict is decided

  1. Any answer marked Stop gives Weak plugin opportunity.
  2. Otherwise, any answer marked Gap gives Promising but needs backend work.
  3. Otherwise the result is Excellent plugin candidate.

There is no score and no weighting. The same answers always give the same result, and every answer shows the reason it was marked the way it was.

Optional and not evaluated. It is carried into your brief if you book a call.

Does your product have an API?

1 of 9 · API

Does your product have an API?

A plugin calls your product through an MCP server, and that server needs something to call.

What does your product know that ChatGPT does not?

2 of 9 · Data

What does your product know that ChatGPT does not?

How often does one person need the workflow?

3 of 9 · Frequency

How often does one person need the workflow?

Does the person need your product to do something, or only to answer?

4 of 9 · Actions

Does the person need your product to do something, or only to answer?

How would a person prove who they are to your product?

5 of 9 · Sign in

How would a person prove who they are to your product?

OpenAI requires OAuth 2.1 for plugins that reach private data or act for a user.

Can you write questions a person would type into ChatGPT that only your product can answer or carry out?

6 of 9 · The natural question

Can you write questions a person would type into ChatGPT that only your product can answer or carry out?

For example: which of my invoices are overdue, or book the 3pm slot with Dr Patel.

Optional and not evaluated.

Can ChatGPT already do the whole task without your product?

7 of 9 · ChatGPT on its own

Can ChatGPT already do the whole task without your product?

Does your product return structured data?

8 of 9 · Structured data

Does your product return structured data?

Records with named fields, as opposed to pages of text or files.

Would any action change something important?

9 of 9 · Consequences

Would any action change something important?

Moving money, deleting records, or sending a message to someone else.

0 of 9 answered.

What the checker cannot tell you

It cannot tell you how many people will use your plugin. Nobody outside OpenAI knows how often ChatGPT suggests a given plugin, and OpenAI states that developers cannot request extra distribution. A strong result here means the plugin would be useful when it is called. It does not mean it will be called often.

It also cannot read your codebase. An API that looks documented from the outside can still need work once another system starts calling it. That is what the Plugin Readiness review is for.

Rules checked against OpenAI's published plugin documentation on 9 October 2026. HouseofMVPs is an independent development studio. We are not affiliated with, endorsed by or partnered with OpenAI. ChatGPT is a trademark of OpenAI. We build the plugin and prepare the submission. OpenAI controls review, approval, ranking and publication.

Common questions

How does the ChatGPT Plugin Readiness Checker decide?+
It uses three fixed rules. Any answer marked Stop gives Weak plugin opportunity. Otherwise any answer marked Gap gives Promising but needs backend work. Otherwise the result is Excellent plugin candidate. There is no score, no weighting and no AI model in the loop, so the same answers always give the same result.
What counts as a Stop?+
Three things. ChatGPT can already do the whole task alone. Nobody would naturally ask for it in a conversation. Or the product only looks up information that is already public. The first comes from OpenAI's plugin guidelines, which ask for functionality the product does not support natively. The other two come from how plugins get used: ChatGPT calls a tool when a request matches its description.
Does a good result mean OpenAI will approve my plugin?+
No. The checker looks at whether a plugin is worth building. Approval depends on OpenAI's review of the finished plugin, including tool annotations, test cases, privacy policy and developer verification. OpenAI controls that review and publishes no timeline for it.
Do you store my answers?+
No. Your answers are evaluated in your browser and are not sent to us. Our analytics records that a result was shown and which of the three verdicts it was, with nothing that identifies you. If you choose to book a call, your result and the two optional text fields are passed to the booking form so you do not have to type them again.
My product has no API. Is a plugin out of reach?+
Not out of reach, but it is two projects. A plugin calls your product through an MCP server, and that server needs an API underneath. The checker marks this as a gap and points you to the readiness review, where the API work is scoped before any plugin work is priced.

Want the build, not just the verdict?

See what a ChatGPT plugin build includes, what it costs and what OpenAI's review asks for.

ChatGPT plugin development