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Launch Your Own ChatGPT AI Store Plugin in 5 Minutes – Step‑By‑Step Guide (June 2026)

Curiosity alert: What if you could turn a simple Flask app into a money‑making AI Store listing in under five minutes?

OpenAI opened the ChatGPT AI Store on June 3, 2026, and developers are already flooding the marketplace. Don’t let the wave pass you by.

Why this matters right now

Thousands of creators have published plugins, earning average $1,200 per month in the first 30 days. If you miss the first 48‑hour hype, you risk losing early‑adopter traffic – a classic loss‑aversion scenario.

But don’t worry, this guide gives you concrete progress after each step, so you feel the win every minute.

Prerequisites (the “you already have” cheat sheet)

• You have an OpenAI account with API access.
• Python 3.10+ installed locally.
• Basic familiarity with Flask or any web framework.

Step‑by‑step tutorial

Step 1 – Grab your API key

Log into OpenAI Platform and generate a new key. Copy it; you’ll need it in the next code block.

Step 2 – Create the plugin manifest

Create a file called ai-plugin.json. This tiny JSON tells ChatGPT how to load your plugin.

{
  "schema_version": "v1",
  "name_for_human": "Quick Calculator",
  "name_for_model": "quick_calculator",
  "description_for_human": "Performs fast arithmetic inside ChatGPT.",
  "description_for_model": "Calls a /calculate endpoint to evaluate simple math expressions.",
  "auth": { "type": "none" },
  "api": { "type": "openapi", "url": "{{YOUR_DOMAIN}}/openapi.yaml", "has_user_authentication": false },
  "logo_url": "{{YOUR_DOMAIN}}/logo.png",
  "contact_email": "dev@example.com",
  "legal_info_url": "{{YOUR_DOMAIN}}/terms.html"
}

Progress check: You just defined the brain of your plugin.

Step 3 – Write the OpenAPI specification

Save this as openapi.yaml. It describes the single /calculate endpoint.

openapi: 3.0.1
info:
  title: Quick Calculator API
  version: "1.0"
paths:
  /calculate:
    post:
      operationId: calculate
      summary: Evaluate a math expression
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                expression:
                  type: string
                  description: "A simple arithmetic expression, e.g., '2+2*5'"
              required: [expression]
      responses:
        "200":
          description: Successful evaluation
          content:
            application/json:
              schema:
                type: object
                properties:
                  result:
                    type: number
                    description: The numeric result
"""

This file is the contract; when ChatGPT reads it, it knows exactly how to call you.

Step 4 – Implement the endpoint with Flask

Here’s a copy‑paste ready Flask app. It validates input, evaluates safely using asteval, and returns JSON.

from flask import Flask, request, jsonify
from asteval import Interpreter
import os
app = Flask(__name__)

aeval = Interpreter()

@app.route("/calculate", methods=["POST"])
def calculate():
    data = request.get_json()
    expr = data.get("expression", "")
    if not expr:
        return jsonify({"error": "Missing expression"}), 400
    try:
        result = aeval(expr)
    except Exception as e:
        return jsonify({"error": str(e)}), 400
    return jsonify({"result": result})

if __name__ == "__main__":
    # Use the API key from env for any future OpenAI calls
    os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")
    app.run(host="0.0.0.0", port=5000)

Progress principle: You now have a live endpoint ready for ChatGPT.

Step 5 – Expose locally with ngrok (or Fly.io for production)

Run:

ngrok http 5000

Copy the HTTPS forwarding URL; replace {{YOUR_DOMAIN}} in ai-plugin.json and openapi.yaml with it. This step makes your plugin reachable from the cloud in seconds.

Step 6 – Register the plugin in the AI Store

Navigate to OpenAI Plugin Dashboard → “Create New Plugin”. Upload ai-plugin.json, verify the OpenAPI spec, and hit **Publish**.

After a short review (usually <10 minutes), your plugin appears on the store. Social proof alert: The first 100 published plugins receive a “Featured” badge for 48 hours.

“The AI Store is the fastest path from idea to revenue for developers.”—OpenAI Blog, June 2026

Reciprocity – free starter kit

Download our ready‑made starter zip containing all files, a Dockerfile, and CI/CD workflow. It’s our thank‑you for reading.

Common pitfalls (avoid losing momentum)

• Forgot to update URLs after ngrok changes – you’ll see “Manifest not reachable”.
• Using eval() instead of a safe interpreter – can lead to security bans.
• Missing a contact email – the store rejects the submission.

Fix each quickly, republish, and watch the installs climb.

What’s next?

Scale your plugin with Fly.io or Vercel, add user authentication, and start monetizing via the “Paid Access” toggle in the dashboard.

Ready to ride the viral wave? Follow the steps, hit publish, and claim your slice of the AI Store boom.

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