Payload Lens: REST & GraphQL Inspector, from the payloadlens.com team, is a Chrome extension that inspects API traffic in DevTools. It detects and organizes REST and GraphQL requests, surfaces payloads, headers, and responses in a structured view, and keeps per-endpoint response history for inspection without switching tools. Features include a DevTools tab, GraphQL operation grouping, REST endpoint grouping, JSON diffing, and automatic redaction of common auth headers. Built for frontend engineers, full-stack developers, and QA pros who want focused, in-browser API inspection during development.

How it presents API traffic inside DevTools rather than the Network timeline

Payload Lens installs a dedicated "Payload Lens" tab in Chrome Developer Tools and creates a workspace that separates API activity from the chronological Network list. The extension automatically detects REST and GraphQL requests and arranges them around endpoints and operations, which reduces the need to copy request details into external tools. The tool is intended to complement the Network tab rather than replace it.

How GraphQL operations and REST endpoints are grouped for faster debugging

The extension identifies GraphQL queries and mutations by their operation names and groups them, while REST calls are collected by endpoint. Built-in JSON diffing provides an inline comparison to spot response changes, and the response history stores prior results for specific endpoints. These behaviors help track how payloads evolve during iterative testing and deployments.

How it handles sensitive headers and demo-friendly output

Payload Lens automatically masks common authentication headers and tokens to avoid accidental exposure during demonstrations or pair debugging. The redaction feature specifically targets headers such as Authorization and Cookie, replacing values in the UI so developers can share screens without revealing credentials. That behavior supports safer, privacy-conscious debugging in team settings.

Who gains most from in-DevTools API inspection and platform coverage

The extension is aimed at frontend engineers, full-stack developers, and QA professionals who frequently inspect API traffic inside the browser. It works on Chrome and other Chromium-based browsers, and it eliminates copying requests into external API clients by keeping inspection inside DevTools. The developer provides this tool as a free, compact add-on to the typical browser debugging workflow.

Practical, in-browser API inspection for developers who need focused tooling

Payload Lens is a practical option for developers who want to analyze live REST and GraphQL HTTP requests directly inside DevTools; it keeps API inspection within the browser and reduces context switching. A notable limitation is scope: the tool focuses on HTTP queries and mutations and does not cover GraphQL subscriptions over WebSocket. For teams focused on request/response debugging, it is a concise, purpose-built choice.