# Open source, built on the same graph. > The CLI, the SDKs, the browser extension and the agent adapters Whisper publishes on GitHub, plus the datasets and libraries behind them. *Source: https://www.whisper.security/open* *Last updated: 2026-09-25* --- Most of it needs no sign-in, and the graph answers on the keyless tier. The MCP server and the examples on this site take a free key. - [Get a free key](https://console.whisper.security/sign-up?redirect_url=https%3A%2F%2Fwww.whisper.security%2Fopen) - [Install the CLI](https://www.whisper.security/docs/cli) ## That domain looks right. Guard checks whether it is. Guard puts a mark in your toolbar that answers one question on every page: is this site really who it says it is? It checks the name against 800+ imitated brands on your device, and against the Whisper graph. Only the hostname ever leaves your browser. - **How the verdict is reached**: Guard checks the site's name on your device first, then confirms with a graph lookup that sends only the hostname. - **Free, no account needed**: Install it and Guard works right away. Sign in free to add the fleet view across every device you manage. - **For teams and MSSPs**: Roll Guard out to a fleet and read every verdict in one console. Only the hostname is checked. Never the page, the path, what you type or your history. - [Chrome Web Store](https://chromewebstore.google.com/detail/whisper-guard/ipiabkcdkhokcanmnfihfhgbjaofpakn) - [Firefox Add-ons](https://addons.mozilla.org/en-US/firefox/addon/whisper-guard/) - [Source on GitHub](https://github.com/whisper-sec/whisper-guard) - [Install Guard](https://chromewebstore.google.com/detail/whisper-guard/ipiabkcdkhokcanmnfihfhgbjaofpakn) - [Check a site in the console](https://console.whisper.security/sign-up?redirect_url=https%3A%2F%2Fwww.whisper.security%2Fopen) ## Install and go. One binary or one install command, in the language you already use. - **[The CLI](https://www.whisper.security/docs/cli)**: One signed binary: Cypher, named recipes and a local MCP server. - **[Node SDK](https://github.com/whisper-sec/whisper-node)**: npm i whisper-id: a routable Whisper identity for any Node agent. - **[Python SDK](https://github.com/whisper-sec/whisper-py)**: pip install whisper-id: the same identity for any Python agent. - **[Edge SDK](https://github.com/whisper-sec/whisper-edge)**: whisper-edge: dependency-free, for serverless and edge runtimes. - **[Homebrew and Scoop](https://github.com/whisper-sec/whisper-cli#install)**: brew install whisper-sec/tap/whisper, or the Scoop bucket on Windows. - **[GitHub Action](https://github.com/whisper-sec/setup-whisper)**: setup-whisper installs the CLI in a workflow and can connect an identity. ## Inside your stack. Kubernetes, n8n, Dify, OpenCTI, MISP and Wazuh, connected to Whisper identities and the graph. - **[Kubernetes operator](https://github.com/whisper-sec/whisper-operator)**: One namespace label gives a pod its own Whisper identity, via a Helm chart. - **[n8n community node](https://github.com/whisper-sec/whisper-n8n)**: Verify and resolve agent identities inside an n8n workflow, with no code. - **[Dify plugin](https://github.com/whisper-sec/dify-plugin)**: Agent-identity verification and RDAP lookups for Dify agents and workflows. - **[OpenCTI connector](https://hub.filigran.io/en/cybersecurity-solutions/opencti-integrations/whisper)**: Enrich OpenCTI observables from the Whisper graph. - **[MISP module](https://misp.github.io/misp-modules/expansion/#whisper)**: An expansion and hover module, shipped inside misp-modules. - **[Wazuh connector](https://github.com/whisper-sec/whisper-wazuh)**: Installed from the GitHub releases. It is not in the Wazuh catalogue yet. ## Inside your agent. MCP tools, Agent Skills and framework adapters for the agents you run. - **[The hosted MCP server](https://www.whisper.security/docs/ai/mcp/setup)**: Seven read-only tools over the whole graph, at mcp.whisper.security. - **[Agent Skills](https://www.whisper.security/docs/ai)**: A SKILL.md file that teaches an agent runtime to use the graph well. - **[Six framework adapters](https://www.whisper.security/docs/ai)**: Claude Code, Gemini CLI, Antigravity, OpenAI Codex, GitHub Copilot CLI and Pi. - **[Programmatic sign-up](https://www.whisper.security/docs/ai/agent-signup)**: Two HTTP calls to a working key, built for agents: no browser and no human in the loop. [Everything for AI agents](https://www.whisper.security/ai) ## On the device. The same CLI, cross-compiled for routers, embedded Linux and microcontrollers. - **[OpenWrt feed](https://github.com/whisper-sec/whisper-openwrt)**: An ipk feed that gives a router its own routable IPv6 identity and safe egress. - **[Yocto layer](https://github.com/whisper-sec/meta-whisper)**: meta-whisper, for embedded-Linux boards such as Raspberry Pi, Zynq and PolarFire SoC. - **[Buildroot tree](https://github.com/whisper-sec/whisper-buildroot)**: A BR2_EXTERNAL tree that adds the Whisper CLI to any Buildroot image. - **[Embedded C core](https://github.com/whisper-sec/whisper-embedded-c)**: A portable C99 identity core for microcontrollers, with Raspberry Pi Pico and NXP wrappers. ## Data and libraries. The datasets and the libraries behind the rest of it. - **[visual-confusables](https://github.com/whisper-sec/visual-confusables)**: Look-alike codepoint pairs, rendered through the fonts browsers actually paint. CC BY 4.0. - **[whisper-catalog](https://github.com/whisper-sec/whisper-catalog)**: Every graph query and read flow as one machine-readable catalog.json, for SDKs, CLIs and MCP servers. - **[STIX 2.1 for Java](https://github.com/whisper-sec/STIX)**: A STIX 2.1 library for Java with builders, validation and a pattern parser. BSD-2-Clause. ## The graph answers without a key. Send a Cypher query to graph.whisper.security/api/query with no key and you get real rows back. The MCP server and the examples on this site take a free key, which the console issues when you sign up. The Community plan stays free. See what the paid plans add on [Pricing](https://www.whisper.security/pricing). ## Start with the tools. Add a free key when you want more. Community is free forever. - [Get a free key](https://console.whisper.security/sign-up?redirect_url=https%3A%2F%2Fwww.whisper.security%2Fopen) - [Install the CLI](https://www.whisper.security/docs/cli)