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Postman

Postman is a platform for designing, using and testing APIs. While it simplifies API development, many scenarios require a proxy between the Postman client and the target server. A proxy acts as an intermediary that makes requests on behalf of the client and receives the response from the server, masking your IP address and adding a layer of security. This guide explains why you might want a proxy in Postman and how to configure Mango Proxy.

Why use a proxy with Postman​

Bypass geographic restrictions​

Some APIs restrict access by region. By routing requests through a proxy you can change your apparent location and test how your application handles requests from different geographies.

Enhanced security and privacy​

A proxy hides your real IP address, providing anonymity and protecting sensitive data when testing APIs. Premium proxies like Mango Proxy also encrypt traffic to ensure confidentiality.

Load balancing​

Proxies can distribute requests across multiple IPs to prevent overloading a single server. This helps avoid server throttling and improves reliability.

Circumvent rate limits​

API providers often limit the number of requests per IP address. By rotating through multiple proxies you can spread requests across different IPs and stay within limits.

Debugging and troubleshooting​

Developers sometimes use proxies to simulate various network conditions or intercept traffic for inspection. This helps diagnose issues and verify that APIs behave as expected.

Setting up a proxy in Postman​

Follow these steps to use Mango Proxy with Postman:

  1. Download and install Postman – visit the official Postman website and download the app for your platform.
  2. Create an account – sign up with a valid email address.
  3. Open Settings – after installation, launch Postman, click the gear icon in the top‑right corner and select Settings.
  4. Go to the Proxy tab – select the Proxy tab to access proxy settings.
  5. Enable a custom proxy – toggle Use a custom proxy configuration. Then choose the proxy protocol and enter the proxy server and port. If you are using premium proxies, enable Proxy Auth and provide your Mango Proxy username and password.
  6. Start working – your workspace will now send requests through the specified proxy.

Postman download site

Registration in Postman

Settings in Postman

Proxy tab in Postman

Enabling a custom proxy in Postman

Choosing the right proxy provider – Mango Proxy​

When selecting a proxy provider consider speed, reliability, price and geographic coverage. Free proxies are often unreliable and insecure. Mango Proxy offers a large network of residential IPs with unlimited concurrent connections for massive scalability. Its 90 million+ IPs allow you to expand your web coverage exponentially and configure geolocation down to the city or ASN level. Mango Proxy supplies residential, mobile and specialised proxies for the US and Europe, helping you bypass any restrictions and collect data from anywhere in the world.

Conclusion​

This guide shows how to configure Mango Proxy in Postman. After configuration you can use Postman to connect to any online service or send HTTP(S) requests through a proxy. Postman supports many aspects of API development, including design, testing, monitoring and documentation, and a proxy adds an extra layer of anonymity and flexibility.

Choosing a reliable proxy provider is a key step. Mango Proxy offers secure, high‑performance proxies with broad geographic coverage. Contact us if you need help selecting the right proxy solution for your needs.

Frequently asked questions​

Best practices for using proxies in Postman​

  • Use secure proxies to ensure data is encrypted and confidential.
  • Choose reputable providers (such as Mango Proxy) for optimal performance and support.
  • Configure different proxies for different environments to keep requests isolated.
  • Monitor proxy performance to ensure they are not a bottleneck in your network traffic.

What if my network requires a proxy but I cannot configure one in Postman?​

You can enable the system proxy option and ensure that your operating system is configured to use a proxy. Instructions vary by OS:

  • Windows: Go to Settings → Network & Internet → Proxy, enable Manual proxy setup, enter the proxy address and port, and click Save.
  • Linux: Open Settings → Network, enable Network proxy, choose Automatic or Manual and enter your proxy configuration.
  • macOS: Open System Settings → Network, click Advanced, select the Proxy tab, choose the proxy type (HTTP(S) or SOCKS) and enter your username and password.

What common problems might occur when setting up a proxy in Postman?​

  • Proxy authentication error 407 – typically indicates incorrect authentication details on the client or server side. Double‑check your credentials.
  • Outdated Postman version – older versions may have issues with proxy settings; update to the latest version.
  • SSL/TLS configuration – if your proxy uses SSL/TLS, make sure Postman is configured to handle encrypted connections through the proxy.
  • Network connection – a weak network can cause problems; ensure you have a stable internet connection.
  • Firewall settings – an active firewall on your device may block the proxy; adjust firewall rules if necessary.
  • Proxy server availability – occasionally the proxy may be down; contact your provider if you suspect downtime.