Question 1

Is Apier completely free to use online without creating an account?

Accepted Answer

Yes, Apier is 100% free with no account creation, email verification, or registration required. You can start sending HTTP GET, POST, PUT, PATCH, and DELETE requests in your browser immediately upon visiting the website.

Question 2

What HTTP request methods does Apier support?

Accepted Answer

Apier supports all standard HTTP methods including GET, POST, PUT, PATCH, and DELETE, with full control over query parameters, custom headers, and request bodies.

Question 3

What body payload formats can I send with Apier?

Accepted Answer

Apier supports raw text payloads (JSON, HTML, XML, plain text) with automatic syntax highlighting and Content-Type assignment, as well as multipart/form-data for key-value fields and binary file uploads.

Question 4

Can I inspect formatted JSON responses, HTTP status codes, and latency?

Accepted Answer

Yes. The response inspector displays high-resolution execution latency in milliseconds, byte sizes, HTTP status codes, full response headers, and offers Pretty, Raw, and Tree visualization modes.

Question 5

Does Apier store or send my API keys and tokens to external cloud servers?

Accepted Answer

No. Apier operates with a strict privacy-first architecture. All request history, authentication tokens, cookies, and environment variables are saved exclusively in your browser's private local storage or Chrome extension storage. Nothing is uploaded to third-party databases.

Question 6

Can I use Apier offline or as a Progressive Web App (PWA)?

Accepted Answer

Yes. Apier is configured as an offline-capable PWA. You can install it directly onto your desktop or mobile device to test APIs quickly without needing to launch heavy desktop software.

Question 7

Is my request history preserved across browser sessions?

Accepted Answer

Yes. Your execution history is preserved in local storage so you can easily review, reopen, and re-execute previous API calls whenever you return.

Question 8

How does the automated domain-scoped cookie jar work?

Accepted Answer

When an API response returns a Set-Cookie header, Apier automatically intercepts, parses, and stores the cookie mapped to the target domain. Subsequent calls made to that same domain automatically include the stored cookies in the outgoing Cookie header.

Question 9

How do I add Bearer tokens or API keys to my requests?

Accepted Answer

Under the Headers tab, add an Authorization key with the value 'Bearer your_token_here'. You can also define custom headers like 'X-API-Key' or 'api-key'. Apier provides auto-complete suggestions for common HTTP headers.

Question 10

How can I inspect or clear active cookies for a specific domain?

Accepted Answer

Click the Cookies button in the top toolbar to open the Cookie Manager panel. From there, you can inspect, add, edit, or purge active cookies associated with any host.

Question 11

How do dynamic variables work in Apier?

Accepted Answer

You can define reusable key-value variables in the Variables panel and reference them anywhere using the {{variableName}} syntax. Apier automatically interpolates variables across target URLs, headers, query parameters, and body payloads.

Question 12

Does Apier provide autocomplete for dynamic variables?

Accepted Answer

Yes. Typing '{{' into the URL or header field immediately summons an autocomplete suggestion popover filtered against your stored variable keys.

Question 13

Can I convert and import raw cURL commands into Apier?

Accepted Answer

Yes. Click the cURL button in the workspace toolbar, paste your raw cURL command from terminal or Chrome DevTools, and Apier will parse the HTTP method, endpoint URL, headers, and request body directly into the UI.

Question 14

Can I export my configured request back to a cURL command?

Accepted Answer

Yes. Apier generates ready-to-use, escaped cURL commands from your active request setup with a single click.

Question 15

How do I use the sequential Auto Runner for automated testing?

Accepted Answer

Open the Auto Runner panel in the workspace, choose your desired iteration count (1 to 50 iterations), configure a delay interval between requests (200ms to 10,000ms), and click start to watch real-time progress, response codes, and latencies.

Question 16

Why do I see a CORS or Network Error, and how can I fix it?

Accepted Answer

Browsers enforce the Same-Origin Policy, requiring cross-origin servers to return appropriate Access-Control-Allow-Origin headers. When testing APIs that do not emit CORS headers (or localhost services), using Apier as an installed Google Chrome extension allows you to bypass browser CORS restrictions safely.

Frequently Asked Questions

Getting Started & Core Testing

Privacy, Storage & Security

Cookies, Headers & Authentication

Dynamic Variables & Environments

cURL, Automation & Troubleshooting

Start Testing APIs Right Now