Interceptor

The Interceptor allows you to intercept, modify, and control in-flight HTTP requests and responses in real-time.

Overview

The Interceptor provides the following capabilities:

• Hold: Pause requests or responses, wait for manual release
• Modify: Modify content before release
• Drop: Discard requests, don't send to target server or client

Enable Interceptor

1. Go to Interceptor page
2. Click Enable Interception switch
3. Configure interception rules (optional)

Once enabled, all matching requests will be paused in the interception queue awaiting processing.

Interception Rules

By Method

Select HTTP methods to intercept:

• GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS

By Domain

Configure domain list to intercept:

api.example.com
*.internal.company.com

By Path

Use regex to match paths:

^/api/v1/users
^/admin/

Interception Queue

When requests or responses are intercepted, they enter the queue:

Field	Description
Method	HTTP method
URL	Request URL
Direction	Request / Response
Status	Waiting / Modified / Released / Dropped
Intercept Time	Time request was intercepted

Operations

View Details

Click request in queue to view full details:

• Request headers
• Request body
• Raw message

Modify Request

1. Select request to modify
2. Click Edit button
3. Modify request content
4. Click Save Changes

Release Request

• Release: Send request (possibly modified) to target server
• Batch Release: Select multiple requests, release at once

Drop Request

• Drop: Discard request, client will receive timeout or error
• Batch Drop: Select multiple requests, drop at once

Response Interception

In addition to request interception, the interceptor also supports intercepting responses from the server:

1. After the request reaches the target server, the response is intercepted on its way back
2. Response headers or body can be modified before release
3. Useful for debugging response content and testing client behavior

Use Cases

Parameter Tampering Testing

1. Enable interceptor
2. Trigger target API request
3. Modify request parameters in queue
4. Release modified request
5. Observe server response

Response Modification Debugging

1. Enable interceptor (including response interception)
2. Trigger request
3. Modify response data in interceptor
4. Release modified response
5. Observe client behavior

Request Blocking

1. Configure domain or path interception rules
2. Matching requests auto-enter queue
3. Drop unwanted requests
4. Client receives connection error

Notes

Performance Impact

Enabling interceptor significantly reduces network performance. Only enable when needed.

Auto Timeout

Intercepted requests timeout after 60 seconds. Process queue promptly.