Bolt.new AI and eBay API integration: Step-by-Step Guide 2025

To integrate Bolt.new with the eBay API, you treat Bolt as a normal full‑stack coding workspace. Bolt does not have any built‑in eBay connector — you integrate by calling eBay’s REST APIs (mostly their Buy API or Sell API) using HTTPS, with proper OAuth2 authentication. In practice: you create an eBay developer account, register your app, create OAuth credentials, store them as environment variables in Bolt.new, then build server-side routes (Node.js/Express inside Bolt’s backend) that request OAuth tokens and call eBay endpoints. Nothing happens magically; you wire everything through standard REST calls.

 

What the integration really looks like

 

When you integrate Bolt.new with eBay, you're simply writing a small backend service inside Bolt that:

• Stores eBay OAuth credentials (client_id, client_secret) in Bolt’s environment variables.
• Requests an OAuth2 access token from eBay using client credentials or authorization code flow (Sell APIs require user consent, Buy APIs often allow application tokens).
• Makes REST API calls to eBay endpoints using fetch/axios inside Bolt’s server-side code.
• Returns the response to your frontend or uses it for automation.

That’s it — the whole integration is just careful wiring of OAuth + REST calls.

 

Step-by-step process (clear and realistic)

 

The steps below reflect the actual way you integrate eBay APIs in a Bolt.new project.

• Create an eBay Developer Account at developer.ebay.com.
• Create an application in eBay’s developer console to get:
  • Client ID
  • Client Secret
  • Redirect URI (if using user OAuth flow)
• Choose your API:
  • Buy APIs: often usable with application access tokens.
  • Sell APIs: require a user-granted OAuth token.
• Open Bolt.new → Add environment variables:
  • EBAY_CLIENT_ID
  • EBAY_CLIENT_SECRET
  • EBAY_REDIRECT_URI (if needed)
• Set up a backend route in Bolt to request OAuth tokens.
• Use that access token to call eBay’s REST endpoints.

 

Working OAuth token request example (Server-side, Node.js)

 

This is the standard OAuth client credentials flow used for some eBay Buy APIs. It works in Bolt’s backend as-is.

// bolt/server/index.js

import express from "express";
import fetch from "node-fetch";

const app = express();

app.get("/api/ebay/token", async (req, res) => {
  try {
    const clientId = process.env.EBAY_CLIENT_ID;
    const clientSecret = process.env.EBAY_CLIENT_SECRET;

    const authHeader = Buffer.from(`${clientId}:${clientSecret}`).toString("base64");

    const tokenResponse = await fetch("https://api.sandbox.ebay.com/identity/v1/oauth2/token", {
      method: "POST",
      headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        "Authorization": `Basic ${authHeader}`
      },
      body: "grant_type=client_credentials&scope=https://api.ebay.com/oauth/api_scope" // replace with needed scopes
    });

    const data = await tokenResponse.json();
    res.json(data);
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

export default app;

 

Calling a real eBay API endpoint

 

Once you have an access token, you can call any REST endpoint. Example: searching products with eBay Buy Browse API.

// bolt/server/index.js

app.get("/api/ebay/search", async (req, res) => {
  try {
    const token = req.query.token; // normally you'd store tokens server-side
    const q = req.query.q || "laptop";

    const searchResponse = await fetch(
      `https://api.sandbox.ebay.com/buy/browse/v1/item_summary/search?q=${encodeURIComponent(q)}`,
      {
        headers: {
          "Authorization": `Bearer ${token}`,
          "Content-Type": "application/json"
        }
      }
    );

    const data = await searchResponse.json();
    res.json(data);

  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

 

Key concepts explained simply

 

• OAuth2 is how eBay verifies that your app is allowed to access data. You exchange your client ID + secret for a short‑lived access token.
• Sandbox vs Production: eBay provides a sandbox environment for testing. Endpoints and credentials are different from production.
• Environment variables in Bolt keep secrets out of your code.
• Server-side code in Bolt is necessary because client-side code cannot safely store secrets.

 

Typical architecture inside Bolt.new

 

You generally end up with:

• Frontend: fetches data from your backend, never touches eBay directly.
• Backend:
  • Fetches OAuth tokens from eBay
  • Calls eBay APIs
  • Returns sanitized data to frontend

This pattern keeps your credentials safe and keeps your eBay API usage stable.

 

In short: Bolt.new integrates with eBay API the same way any Node.js backend does: store credentials, request OAuth tokens, call eBay REST endpoints. No magic — just clean wiring.