contextbro.app

What It Is

Context Bro is a browser extension designed to turn users’ everyday browsing activity into structured context and send it to any API endpoint via a simple POST request. It is not a full cloud platform; rather, it works as a browser-side context collection and forwarding layer, making it suitable for connecting to AI Agents, automation pipelines, or self-hosted HTTP receiving services.

Core Capabilities

Functionally, it supports one-click sharing triggered via a popup, right-click menu, keyboard shortcut, or floating button. It also supports site-specific automatic capture rules, including focused mode, background polling, dynamic page refetching, and content deduplication. Its template system is the main highlight: users can use variables and 50+ filters to control the shape of the JSON payload, with 7 built-in preset templates covering General, GitHub PR, Stack Overflow, News, Reddit, YouTube, and Selection. It also supports multiple named API targets and custom headers, making it easy to separate work, personal, research, and other use cases. For live streaming, it provides integrations for Twitch and YouTube live chat, capturing chat messages, donations, and subscriptions.

Open Source, Privacy, and Deployment

Context Bro is clearly labeled as fully open source under the MIT License, with no server-side component. Its privacy design follows an allowlist-first model: nothing is shared by default, and it states that there is no analytics, no tracking, and no servers. This makes it appealing to developers who need control over the boundaries of outbound browsing data. In terms of self-hosting, the product itself does not provide a server, but data can be sent to the user’s own API, so it is better suited to teams that already have a backend or automation platform.

Pricing and Ecosystem

The main content does not provide pricing or commercial support information, so it is not possible to determine whether paid plans exist. Installation channels include the Chrome Web Store, Firefox Add-ons, and direct downloads for Chrome/Firefox versions. However, the official store versions may lag behind, and the latest version needs to be loaded manually, which slightly affects convenience. The documentation explains the core concepts and features, but based on the captured content, it lacks more in-depth API examples, template samples, and troubleshooting guidance.

Pros, Cons, and Who It’s For

Its strengths are that it is open source, serverless, conservative by default on privacy, customizable in payload format, and flexible in API targets. It is especially suitable for developers who want to feed browser context into AI Agents, automation scripts, research databases, or personal knowledge systems. The drawbacks are that users need to provide their own API receiving endpoint, which raises the barrier for non-technical users; commercial support, pricing, and team background information are also unclear.

Access from China

Access from China is not discussed in the main content. Since it depends on browser extension stores and external API endpoints, access to the Chrome Web Store in mainland China is generally uncertain. Direct download may be an alternative route, but actual network availability still needs to be tested. Payment information is not disclosed. Alternatives may include building a custom browser extension, using web clipping tools, or writing automated collection scripts.