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Rest APIprogramming~5 mins

Batch create endpoint design in Rest API

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Introduction

Batch create endpoints let you add many items at once. This saves time and reduces the number of requests.

When users need to upload multiple records in one go, like adding many contacts.
When importing data from a file with many entries.
When syncing data from another system that sends multiple items together.
When you want to reduce network calls to improve speed.
When your app needs to create many related objects quickly.
Syntax
Rest API
POST /items/batch
Content-Type: application/json

{
  "items": [
    {"name": "Item1", "value": 10},
    {"name": "Item2", "value": 20}
  ]
}

The HTTP method is usually POST because you are creating new data.

The request body contains an array of objects inside a key like "items".

Examples
Batch create users by sending an array of user objects.
Rest API
POST /users/batch
Content-Type: application/json

{
  "users": [
    {"username": "alice", "email": "alice@example.com"},
    {"username": "bob", "email": "bob@example.com"}
  ]
}
Batch create products with their name and price.
Rest API
POST /products/batch
Content-Type: application/json

{
  "products": [
    {"name": "Pen", "price": 1.5},
    {"name": "Notebook", "price": 3.0}
  ]
}
Sample Program

This request creates two tasks at once: "Buy milk" and "Walk dog".

Rest API
POST /tasks/batch
Content-Type: application/json

{
  "tasks": [
    {"title": "Buy milk", "done": false},
    {"title": "Walk dog", "done": false}
  ]
}
OutputSuccess
Important Notes

Always validate each item in the batch to avoid partial failures.

Return clear success or error info for each item in the response.

Limit batch size to avoid overloading the server.

Summary

Batch create endpoints let you add many items with one request.

Use POST with a JSON array of objects inside a named key.

Handle validation and response carefully for each item.