How do I use URL templates?

Use curly braces for placeholders that match your CSV headers. For example, /products/{id}/shops/{shop_id} will replace {id} and {shop_id} with values from columns named 'id' and 'shop_id' in your CSV.

How many concurrent requests can I run?

You can configure 1-50 concurrent workers. Higher concurrency is faster but may overwhelm the target server. Start with 5-10 for most use cases.

Bulk API Invoker

Request Configuration

Use {column_name} for placeholders that match CSV headers

Concurrent Workers: (1-50)

Headers

Headers can also use {placeholders}

Request Body Template

(for POST/PUT/PATCH)

JSON body with placeholders. Non-string values like numbers work too.

CSV Data

Upload CSV

Paste CSV or upload file. First row = headers.

Use CORS Proxy

Show Headers Show Body

Bulk API Testing Tool

Execute multiple API calls using data from a CSV file. Perfect for batch operations, data migration, load testing, or validating API endpoints with different inputs. All processing happens in your browser.

How to Use

Enter your URL template with placeholders like /api/products/{id}
Paste or upload CSV data where column headers match your placeholder names
Optionally configure headers and body template (also supports placeholders)
Set the number of concurrent workers (higher = faster, but may overwhelm the server)
Click "Start Execution" and watch the progress

Example

URL Template:

https://api.example.com/products/{product_id}/inventory

CSV Data:

product_id,warehouse
SKU001,WH-A
SKU002,WH-B
SKU003,WH-A

Body Template (for POST):

{"warehouse": "{warehouse}", "check_stock": true}