Full HTTPS Interception
Decrypt HTTPS traffic locally with automatic certificate management and one-click trust, so application requests can be inspected without manual setup.
NetworkSpy
NetworkSpy is an HTTP traffic debugger for modern web, mobile, GraphQL, streaming, and AI applications. It helps developers inspect, replay, and modify application traffic on macOS, Linux, and Windows.
Overview
NetworkSpy is an HTTP traffic debugger for teams working on modern web, mobile, GraphQL, streaming, and AI applications. It captures and inspects application traffic locally so developers can understand request and response behavior, replay traffic, and adjust payloads during debugging.
The product focuses on application-level HTTP/HTTPS analysis rather than low-level packet inspection. Source pages highlight full HTTPS interception, GraphQL-aware inspection, WebSocket and gRPC support, request breakpoints, dynamic resource mapping, AI-assisted analysis, and a native MCP bridge for connecting traffic to AI agents.
Capabilities
Deep Packet Inspection
Inspect headers, raw bodies, timing, and payload details for each request, giving a complete view of HTTP/HTTPS traffic.
Request Comparison Engine
Compare any two requests side by side to spot changes in headers, bodies, and response states during debugging or regression checks.
Request Replay and Breakpoints
Modify live traffic before it reaches the client or server, or re-emit captured requests for repeat testing and API iteration.
Resource Mapping and Workflows
Map remote resources to local files and automate transformations with scripting rules for rapid frontend prototyping and traffic rewriting.
GraphQL, AI, and Custom Viewers
Parse GraphQL queries and fragments, analyze streaming AI payloads, and build custom viewers for proprietary or structured formats.
Use Cases
Debug application traffic
Inspect API requests and responses for modern web or mobile apps when you need to understand headers, bodies, timing, and protocol behavior without switching to packet-level tooling.
Analyze modern protocols
Work with GraphQL, WebSocket, gRPC, or streaming AI traffic by decoding structured payloads and watching message flow in real time.
Test breakpoints and replays
Pause a request, change its payload or response, and send it onward to verify edge cases, error handling, and client behavior before shipping.
Map resources and automate rewrites
Replace remote assets with local files or apply scripted transformations when prototyping frontend changes or iterating on backend behavior.
Coordinate debugging across a team
Use team plans when centralized billing, shared interception rules, or audit and support features are needed for several developers.
Pros and Cons
Pros
- Supports modern traffic types including HTTP/HTTPS, WebSockets, gRPC, GraphQL, and streaming AI payloads.
- Offers practical debugging tools such as replay, live breakpoints, side-by-side comparison, and resource mapping.
- Includes custom viewers and AI-assisted analysis for inspecting structured or proprietary payloads.
- Provides desktop downloads for macOS, Linux, and Windows, with installation paths documented on the download page.
- Pricing is published with individual, team, business, and lifetime options, which makes plan differences easier to compare.
Cons
- The source does not publish a complete integrations catalog, so the broader ecosystem is unclear from the pages provided.
- Some advanced capabilities are plan-dependent, so the free core product does not include every workflow shown on the site.
FAQ
Does NetworkSpy support HTTPS interception?
NetworkSpy supports full HTTPS interception and automatically installs a root certificate to decrypt traffic on your local machine.
Which operating systems does NetworkSpy support?
Yes. The download page lists native support for macOS, Linux, and Windows.
Can I use NetworkSpy on multiple devices or with a team?
An Individual license is for one user on one device. Team licenses are sold per seat and include centralized billing and shared interception rules.
Is NetworkSpy free?
NetworkSpy is free to use with core features. Paid plans add capabilities such as the Custom Viewer Builder, AI Viewer, priority support, and team features.
What happens if I cancel a subscription or buy Lifetime?
The pricing page says the subscription plans end at the close of the billing period if you cancel, while the Lifetime license provides perpetual access to the current version and minor updates.
Quick Facts
- Category
- Developer Tool
- Primary use
- HTTP traffic debugging and inspection
- Platforms
- macOS, Linux, Windows
- Source domain
- networkspy.app
- Notable workflows
- HTTPS decryption, GraphQL inspection, streaming AI analysis, request replay, and live breakpoints
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