Lovable and Marvel integration: Step-by-Step Guide 2025

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How to integrate Lovable with Marvel?

Setting Up MD5 Dependency via CDN Script

Open your Lovable project’s main HTML file (commonly named index.html).
Add the following script tag inside the <head> section to load the MD5 library from a CDN. This library is needed to create the required hash for Marvel API authentication.


<script src="https://cdnjs.cloudflare.com/ajax/libs/blueimp-md5/2.10.0/js/md5.min.js"></script>

Save your changes.

Creating and Implementing Marvel Service File

Create a new file in your project’s code editor and name it marvelService.ts.
This file will contain a TypeScript class that handles communication with Marvel’s API.
Because Lovable doesn’t have a terminal to install packages, we use the globally loaded md5 function from the CDN. We declare it at the top of the file to satisfy TypeScript.


declare var md5: (value: string) => string;

export class MarvelService {
  // Replace with your Marvel API credentials
  private publicKey: string = 'YOURPUBLICKEY';
  private privateKey: string = 'YOURPRIVATEKEY';
  private baseUrl: string = 'https://gateway.marvel.com/v1/public';
  
  // Generates authentication parameters required by Marvel
  private getAuthParams(): { ts: string, hash: string, apikey: string } {
    const ts = new Date().getTime().toString();
    const hash = md5(ts + this.privateKey + this.publicKey);
    return { ts, hash, apikey: this.publicKey };
  }
  
  // Fetches a list of Marvel characters (default limit is 20)
  public async getCharacters(limit: number = 20): Promise<any> {
    const { ts, hash, apikey } = this.getAuthParams();
    const url = ${this.baseUrl}/characters?limit=${limit}&ts=${ts}&apikey=${apikey}&hash=${hash};
    const response = await fetch(url);
    return response.json();
  }
}

Be sure to replace 'YOURPUBLICKEY' and 'YOURPRIVATEKEY' with your actual Marvel API keys.

Integrating Marvel Service into Your Lovable Project

Locate the main TypeScript file or component where you wish to use Marvel data. This might be an existing file where you manage API calls or data fetching.
Import the MarvelService class from the file you just created.
Instantiate the service and use its method to fetch Marvel characters.


import { MarvelService } from './marvelService';

// Create an instance of MarvelService
const marvelService = new MarvelService();

// Example: Fetch 10 Marvel characters and log the result
marvelService.getCharacters(10)
  .then(data => {
    console.log('Marvel Characters:', data);
    // Insert further handling of the data here
  })
  .catch(error => {
    console.error('Error fetching Marvel characters:', error);
  });

This code can be inserted into any file responsible for handling data retrieval or within your main application logic.

Configuring Your Marvel API Keys

Open the marvelService.ts file.
Locate the lines that define publicKey and privateKey.
Replace 'YOURPUBLICKEY' and 'YOURPRIVATEKEY' with the actual keys provided by Marvel after registering at their developer portal.


// Example configuration; replace with your own keys
private publicKey: string = '123abcYourPublicKey';
private privateKey: string = '456defYourPrivateKey';

Save the file after updating the credentials.

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