index.js

const express = require("express");
const app = express();
const port = 8080;//you can choose any port 
const dotenv = require('dotenv');
dotenv.config();
const Replicate = require("replicate");
const api_Key = process.env['REPLICATE_AUT_KEY']
const replicate = new Replicate({
 auth: api_Key,
});

const Key = "key"; //your custom key

app.get("/generate", async (req, res) => {
 const { apiKey } = req.query;
 if (!apiKey || apiKey !== Key) {
  res.status(401).json({ error: "Invalid API key" });
 } else {
  try {
   const { imageUrl } = req.query;
   if (!imageUrl) {
    return res.json({ error: "Provide an image URL" });
   }

   const output = await replicate.run(
    "methexis-inc/img2prompt:50adaf2d3ad20a6f911a8a9e3ccf777b263b8596fbd2c8fc26e8888f8a0edbb5",
    {
     input: {
      image: imageUrl,
     },
    }
   );

   return res.json(output);
  } catch (error) {
   console.log(`Error generating prompt:\n${error}`);
 res.status(500).json({ error: "Failed to generate prompt" });
  }
 }   
   });   
app.listen(port, () => {
 console.log(`Server is running on port ${port}`);
});