The 3-Second Workflow: Send API Requests in Postmate Client (VS Code)

Once your project is set up — environments configured, data tables attached, collections organised — sending a fully parameterised API request to any environment with any test data takes exactly three steps.

No copy-paste. No editing request bodies. No switching files.

How It Works

1. Select Your Environment

Choose the environment in Postmate Client where you want to run your API request. Every {{variable}} in your request URL, headers, and body is instantly resolved using that environment's values.

In the top-right corner of Postmate Client, open the Env dropdown and pick your target environment — Dev, Staging, Production, or any custom environment you've created.

{{baseUrl_school}}/student
→ https://api.dev.myschool.com/student   (Dev)
→ https://api.myschool.com/student       (Production)

2. Select Your Test Data

Below the request panel, open the Select Data dropdown. It automatically shows the data table rows attached to your active environment — no manual input needed. Pick a row from your data table to populate request parameters automatically, saving you manual input and reducing errors.

username,          password,    region,  accountNumber
m4@mithilaschool.com,  Test@123,    DEV,     123456
admin@school.com,      Admin@456,   PROD,    789012

Postmate Client injects that row's values as variables into your request on the fly.

3. Click Send

Execute your fully parameterized API request in one click — no manual edits, no copy-paste.

Hit Send. That's it. Postmate Client fires the request with the correct base URL from your environment and the exact credentials and parameters from your selected data row — simultaneously, in one click.

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Why This Matters

Without this workflow, testing across environments typically means:

• Manually editing the request URL to switch between dev and prod
• Copy-pasting credentials into the request body for each test case
• Keeping a separate spreadsheet of test users open on the side

With Postmate Client, all of that is replaced by two dropdowns and a button.

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Setting It Up (One Time)

This workflow requires a little upfront setup — but you only do it once.

Step 1 — Create your environments

Go to Env → Manage Environments and create one environment per target (e.g. Dev, Staging, Production). Add your base URLs and shared variables to each.

See Environments & Variables for the full guide.

Step 2 — Create a data table and attach it to an environment

Go to the environment's Data Tables section, create a table, and add rows for each test user or data set. Attach the table to the environment.

See Data Tables for the full guide.

Step 3 — Use {{variables}} in your requests

Reference environment variables and data table columns in your request URL, headers, and body using {{variableName}} syntax.

See Variable Resolution for how values are resolved.

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Ready to automate further?

Once your project is set up in Postmate Client, sending fully parameterized API requests across multiple environments is as simple as three clicks. No copy-paste, no manual edits, and zero switching between files or spreadsheets.

Try the Collection Runner — it iterates through every row in your data table automatically, running the full collection once per row with zero manual intervention and produce beautiful HTML and JSON report.