How to Create an API Endpoint Without a Backend

Hi, I'm Chae-won.

In our first post, I talked about the "we need an API but don't have a dev team" situation. Today, let's go a step further and walk through how to actually set one up.

No coding, no server, done in 3 minutes. Here's the process.

Wait, what's an API endpoint?

An API endpoint is "an address for sending and receiving data."

To receive mail, you need a mailbox address. An API endpoint is your digital mailbox. When a partner sends data to this address, you can receive and review it.

Normally, creating this "mailbox" requires setting up a server, writing code, and designing a database. Developer-level work. But with 3Min API, you can skip all of that.

Step 1: Decide what data to receive

The first thing to do is decide "what data do I want to receive?"

Say you want to receive order data from an e-commerce partner. You'd need fields like:

{
  "order_id": "ORD-001",
  "product_name": "Wireless Earbuds",
  "quantity": 2,
  "price": 45.00,
  "customer_name": "John Smith"
}

Decide which fields you need and what format each should be (text, number, etc.). It's best to agree on this with your partner.

Step 2: Create the endpoint in 3Min API

Log into the 3Min API dashboard and click "Create New Endpoint." You'll enter:

• Name: Something descriptive (e.g., "Store A Orders")
• Field definitions: What data to accept

Add fields one by one — name, type (text, number, date, etc.), and whether it's required. All done through the UI with clicks.

Once saved, you instantly get an API URL. That URL is your "digital mailbox."

Step 3: Test in the sandbox

When you create an endpoint, a sandbox environment is automatically set up. The sandbox is your "practice space" — send and delete data freely without affecting production.

Share the sandbox API key (starts with tm_test_) with your partner's developer, and they can start sending test data. You can verify everything is coming through correctly in the dashboard.

Feel free to modify or add fields at this stage. Keep adjusting until both sides are happy.

Step 4: Deploy to production

When testing is done, hit the "Deploy to Production" button. This activates production API keys (starting with tm_live_), and your partner can start sending real data.

Production data is completely separated from sandbox. You can monitor incoming data in real time on the dashboard, and statistics accumulate automatically.

Step 5: Connect a webhook (optional)

Want incoming data automatically forwarded somewhere? Set up a webhook. For example:

• Forward data to your internal system
• Send alerts to a Slack channel
• Auto-record to a Google Sheet

Just enter the webhook URL — done. Every time data arrives, it's forwarded automatically.

How long does all this take?

If you've already agreed on the data format with your partner, the whole process genuinely takes about 3 minutes. Define fields + create endpoint + share test key. That's it.

No server setup, no code writing, no database design. No outsourcing costs, no weeks of waiting.

What's next?

If your business grows and you need more complex logic, that's when you consider building your own system. Data stored in 3Min API can be exported as JSONL anytime, so there's no risk of data loss.

The important thing is to start. Getting data flowing today beats waiting weeks for the perfect system.