Mcp Nixos is live · free · last verified 30 Oct 2026 · viability monitor
Mcp Nixos
Open-source MCP server that feeds your AI assistant live NixOS package, option, and flake data so it stops inventing attribute names.
If you drive NixOS configuration from Claude, Cursor or another MCP client, MCP-NixOS is a cheap accuracy upgrade: two tools, plain-text answers, ~1,030 tokens total, no local Nix install to babysit. It kills the exact failure that wastes an evening — a model confidently writing `pkgs.firefox_esr` when the attribute does not exist — by pulling from search.nixos.org, NixHub.io, noogle.dev, FlakeHub and cache.nixos.org live. The trade-off is scope: outside Nix it gives you nothing, and every answer depends on those upstream APIs being reachable.
Verdict generatedVerified 3h ago · liveness 64/100 · cite: rightaichoice.com/tools/mcp-nixos
- NixOS users who drive configuration work from Claude, Cursor or another MCP client
- Home Manager power users managing dotfiles with AI assistance
- DevOps engineers who want authoritative Nix data inside their assistant
- Developers automating Nix package lookups in CI/CD
- Anyone who needs a graphical interface — the whole surface is MCP tool calls
- People who do not use NixOS, Home Manager or nix-darwin
- Teams that require SLA-backed commercial support
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Skip MCP-NixOS if your work doesn't touch NixOS, Home Manager or nix-darwin — every one of its sources is Nix-specific, so it adds context cost without adding an answer you can use.
MIT-licensed and free to run, so there is no per-seat math to do: the only cost is the context you spend — roughly 1,030 tokens per response — inside whichever MCP client you already pay for, such as Claude or Cursor. That makes it cheaper to try than any per-query package-data service.
In short
Mcp Nixos — Open-source MCP server that feeds your AI assistant live NixOS package, option, and flake data so it stops inventing attribute names. Best for NixOS users who drive configuration work from Claude, Cursor or another MCP client, Home Manager power users managing dotfiles with AI assistance, DevOps engineers who want authoritative Nix data inside their assistant. Free to use.
What is Mcp Nixos?
Mcp Nixos — Open-source MCP server that feeds your AI assistant live NixOS package, option, and flake data so it stops inventing attribute names. Best for NixOS users who drive configuration work from Claude, Cursor or another MCP client, Home Manager power users managing dotfiles with AI assistance, DevOps engineers who want authoritative Nix data inside their assistant. Free to use.
MCP-NixOS is an open-source Model Context Protocol server that gives AI assistants real Nix data instead of guesses. It exposes two MCP tools: `nix`, a single unified query tool covering search, info, stats, option browsing, channels, flake inputs and binary cache lookups across every source it knows, and `nix_versions`, which returns package version history with nixpkgs commit hashes via NixHub.io. Coverage spans 130K+ NixOS packages and 23K+ system options from search.nixos.org, 5K+ Home Manager options, 1K+ nix-darwin settings, community flakes on search.nixos.org and Determinate Systems' FlakeHub, 2K+ Nix function signatures from noogle.dev, 5K+ Nixvim options from the NuschtOS index, 2.4K+ NVF options, plus wiki.nixos.org and nix.dev tutorial content. It also reads your pinned flake inputs directly from local /nix/store and checks cache.nixos.org before you start a three-hour Firefox build. Every response is plain text, roughly 1,030 tokens in total, so it does not eat your context window. It runs as an API client with no local Nix installation, over STDIO or as a remotely hosted HTTP MCP server, on Windows, macOS and Linux. Drop one JSON block into your MCP client config (`uvx mcp-nixos`) and you are running. MIT licensed, a Utensils project.
Key features
- Unified `nix` MCP tool covering search, info, stats, option browsing, channels, flake inputs and binary cache lookups
- `nix_versions` MCP tool for package version history with nixpkgs commit hashes via NixHub.io
- Search and inspect 130K+ NixOS packages from search.nixos.org
- Browse 23K+ NixOS system options from the official index
- 5K+ Home Manager user-level options for dotfile and user-environment work
- 1K+ nix-darwin macOS settings
- Community flake search across search.nixos.org and the FlakeHub registry by Determinate Systems
- 2K+ Nix function signatures with types from noogle.dev
- 5K+ Nixvim options from the NuschtOS index and 2.4K+ NVF options
- Binary cache status checks against cache.nixos.org before you start a long build
- Reads your pinned flake inputs directly from local /nix/store
- Wiki and tutorial content from wiki.nixos.org and nix.dev
- Plain-text responses at roughly 1,030 tokens total, keeping context window free
- STDIO transport locally or remotely hosted HTTP MCP server
- Cross-platform on Windows, macOS and Linux with no local Nix installation required
Behind the verdict
The design choice that matters here is restraint. Most MCP servers bolt on a tool per endpoint and burn your context on scaffolding; MCP-NixOS ships exactly two tools and returns plain text at roughly 1,030 tokens total. That leaves room for the actual configuration work in the same conversation. Strengths: the coverage is genuinely broad and comes from authoritative places rather than a scraped mirror — search.nixos.org for packages and options, NixHub.io for version history with nixpkgs commit hashes, cache.nixos.org for binary cache status, FlakeHub for the Determinate Systems registry, noogle.dev for function type signatures, NuschtOS for Nixvim options and the published NVF catalogue for Neovim through Nix. It also reaches outside the package index to wiki.nixos.org and nix.dev, which is where a beginner's actual question usually lives. Reading pinned flake inputs straight out of local /nix/store is the sleeper feature — it means the assistant answers against the flake you actually locked, not a generic channel. Deployment is simple and unglamorous in the right way: an API client that needs no Nix installation, working on Windows, macOS and Linux, over STDIO locally or HTTP when hosted remotely. The quick-start config is three lines. MIT licensed. Weaknesses: every answer is a live external call, so results inherit the availability and rate limits of nine upstream services, and caching is in-process rather than persistent. Output is plain text with no graphical or multi-modal responses, and there is no conversational surface of its own — you are always inside Claude, Cursor or another MCP client. It is also unambiguously Nix-only: useful for anyone touching NixOS, Home Manager or nix-darwin, worthless for everyone else. Where it fits: NixOS users who already work inside an MCP-speaking assistant, dotfile maintainers using Home Manager, DevOps engineers who want cache checks before CI builds, and AI tool builders who need a dependable Nix package source in a pipeline. Where it does not: graphical-interface users, non-Nix teams, and anyone expecting vendor-backed commercial support. Pair it with a general-purpose MCP server for the rest of your stack.
Limitations
- It is a stateless async FastMCP server (Python 3.11+) exposing exactly two tools, `nix` and `nix_versions`.
- Every answer comes from live external APIs — search.nixos.org, NixHub.io, cache.nixos.org, FlakeHub, noogle.dev, NuschtOS, NVF docs, wiki.nixos.org, nix.dev — so results inherit those sources' availability and rate limits.
- Caching is in-process for discovered channels and catalogue-style sources rather than a persistent store or database.
- It reads local flake inputs from /nix/store but does not itself require Nix to be installed.
- Responses are plain text, with no graphical or multi-modal output, and there is no interface beyond the MCP client you point it at.
as of 2026-10-30
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Is Mcp Nixos still active?
Mcp Nixos is live · free · last verified 30 Oct 2026 · viability monitor.
Viability score
How well maintained and how widely used is Mcp Nixos? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →What do users say about Mcp Nixos?
What people actually say about Mcp Nixos — is it worth it?
Our community sentiment research written Jul 3, 2026 is more than 90 days old, so it is being re-reviewed against current data and is not shown.
How we verified this
Every listed fact about Mcp Nixos— pricing, features, links, status — is re-read from the vendor's own pages by our verification pipeline and each change is logged with a date; the last pass ran on 30 Oct 2026. Pages mix model-assisted synthesis with human review; see how we verify.
Verification history
We have re-verified Mcp Nixos 11 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — changed description, setup time, pricing fit, switching in, use cases, who should skip it, switching out, summary, features, our verdict, who it suits, integrations, limitations
- — changed hidden costs, who it suits, description, our verdict, features, limitations, switching in, switching out, who should skip it, pricing tiers, pricing fit, setup time, summary, use cases
- — changed limitations, platforms, pricing page
- — changed limitations
- — changed hidden costs, pricing fit, setup time, switching out, switching in, our verdict, who should skip it, pricing tiers
- — changed SSL certificate
Showing the 6 most recent of 11 verification passes.
Free to cite with attribution — this page re-verifies continuously.
How much does Mcp Nixos cost in 2026?
Mcp Nixos: Free to use. Pricing last verified 30 Oct 2026.
Plans compared
Every published Mcp Nixos tier, its price as the vendor publishes it, who it fits, and what it adds over the tier below. The 12-month cost projection follows.
| Plan | Price | Billing | Who it's for |
|---|---|---|---|
| Open Source | Free | — | NixOS, Home Manager and nix-darwin users who already work inside an MCP client and want authoritative Nix data without a paid seatAdds: free entry point — both MCP tools (`nix` and `nix_versions`) with the full source list, MIT licensed |
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Where the pricing makes sense
The company stage and team size where Mcp Nixos's pricing actually pencils out — and where peers do it cheaper.
MIT-licensed and free to run, so there is no per-seat math to do: the only cost is the context you spend — roughly 1,030 tokens per response — inside whichever MCP client you already pay for, such as Claude or Cursor. That makes it cheaper to try than any per-query package-data service.
Has Mcp Nixos' pricing changed?
No plan price for Mcp Nixos has moved since we began logging in Aug 2026; the pricing page is re-read on every verification pass.
Who should pick Mcp Nixos?
Pick Mcp Nixos if you are NixOS users who drive configuration work from Claude, Cursor or another MCP client, Home Manager power users managing dotfiles with AI assistance, DevOps engineers who want authoritative Nix data inside their assistant, Developers automating Nix package lookups in CI/CD.
Look elsewhere if you are Anyone who needs a graphical interface — the whole surface is MCP tool calls, People who do not use NixOS, Home Manager or nix-darwin, Teams that require SLA-backed commercial support.
Skip it if Skip MCP-NixOS if your work doesn't touch NixOS, Home Manager or nix-darwin — every one of its sources is Nix-specific, so it adds context cost without adding an answer you can use.
GeneratedReal-world workflow fit
Concrete scenarios for the personas Mcp Nixos actually fits — and what changes day-one when you adopt it.
You ask Claude which attribute exposes Firefox ESR. Instead of guessing, the `nix` tool queries search.nixos.org and returns the real attribute name and the options related to it.
Outcome: You paste a correct attribute into configuration.nix the first time and skip the eval-error-and-rebuild loop.
You need the exact option path for a user-level setting. The `nix` tool browses the 5K+ Home Manager option catalogue and returns the definition rather than a plausible-looking guess.
Outcome: Your dotfile changes evaluate cleanly on the first `home-manager switch`.
Before triggering a long build, you ask whether cache.nixos.org already has the binary, and pull the nixpkgs commit hash for the version you want via `nix_versions`.
Outcome: You pin reproducibly and either skip the build entirely or know exactly what you're waiting on.
Use cases
- Check whether an attribute like pkgs.firefox_esr actually exists before you write it into configuration.nix
- Look up which options a module exposes before editing configuration.nix instead of guessing option paths
- Find the nixpkgs commit hash that shipped a specific package version so you can pin it reproducibly
- Check cache.nixos.org for a binary before kicking off a multi-hour local build in CI
- Query Home Manager option definitions while setting up user environments and dotfiles
- Inspect your pinned flake inputs from /nix/store without leaving the chat
- Look up Nix function type signatures from noogle.dev so an expression is right the first time
- Pull Nixvim or NVF option names when configuring Neovim through Nix
Setup time & first value
How long it actually takes to get something useful out of Mcp Nixos — broken out by persona, not the marketing-page minute.
Claude or Cursor users: about five minutes — paste the `uvx mcp-nixos` block into your MCP client config, restart the client, and the two tools are available. Remote HTTP hosting takes longer, roughly the time to stand up a Python 3.11+ service. No local Nix installation is needed either way.
Switching to or from Mcp Nixos
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From manual search.nixos.org browsing in a browser tab: replace the tab with `nix` tool queries inside your MCP client so the answer lands in the same conversation as the config edit
- ↗To a general-purpose MCP server: keep MCP-NixOS alongside it, since its value is the Nix-specific data sources rather than general capability
Integrations
Resources & guides
Tutorials & Learning
YouTube returned 6 videos for “Mcp Nixos”, and we withheld 6: 6 did not mention Mcp Nixos. We are showing none, because we could not prove any of them are about Mcp Nixos.
Official links
What are the best Mcp Nixos alternatives?
The closest alternatives to Mcp Nixos we list are Keboola MCP Server, Kindly Web Search Mcp Server and Mcp Shodan. Ranked by direct product-type match, not category overlap.
| Alternative | Pricing | Starts at | Last verified |
|---|---|---|---|
| Keboola MCP Server | Freemium | Pricing not published | — |
| Kindly Web Search Mcp Server | Freemium | Pricing not published | — |
| Mcp Shodan | Free | Free | — |
Alternatives to Mcp Nixos
View all
Keboola MCP Server
Keboola's open-source MCP Server lets Claude, Cursor, or ChatGPT build governed Keboola data pipelines in plain language.
Kindly Web Search Mcp Server
Open-source MCP web search server that gives coding agents live results plus clean full-page extraction.
Mcp Shodan
Open-source MCP server for Shodan lookups — query devices, DNS records, and CVE data by plain English from Claude Code or Codex.
Tools that pair well with Mcp Nixos
Common stack mates teams adopt alongside Mcp Nixos, with the specific reason each pairing earns its keep.
Keboola MCP Server
Keboola's open-source MCP Server lets Claude, Cursor, or ChatGPT build governed Keboola data pipelines in plain language.
Kindly Web Search Mcp Server
Open-source MCP web search server that gives coding agents live results plus clean full-page extraction.
Mcp Shodan
Open-source MCP server for Shodan lookups — query devices, DNS records, and CVE data by plain English from Claude Code or Codex.
Mcp Nixos vs its closest rival
Mcp Nixos's closest head-to-head is with Spider Cloud — Choose Mcp Nixos if you live in the Nix ecosystem and need real-time, hallucination-free package/option data for AI-assisted infrastructure. Choose Spider Cloud if you need a high-speed, low-cost web scraping and crawling API to feed real-time web data into AI agents or RAG pipelines. They serve completely different domains — Nix internals vs. web data extraction. Verdict generated
Head-to-head comparisons
Mcp Nixos vs Spider Cloud
Choose Mcp Nixos if you live in the Nix ecosystem and need real-time, hallucination-free package/option data for AI-assisted infrastructure. Choose Spider Cloud if you need a high-speed, low-cost web scraping and crawling API to feed real-time web data into AI agents or RAG pipelines. They serve completely different domains — Nix internals vs. web data extraction.
GeneratedMcp Nixos vs Temporal Ai
If your world is NixOS and you need instant, accurate package/option data inside your AI assistant, MCP-NixOS is a free, no-brainer tool. If you're building production AI agents that must survive failures, orchestrate multi-step workflows, or involve human approval, Temporal AI's durable execution is the industry standard. Choose based on your problem domain: infrastructure lookup vs. resilient orchestration.
GeneratedMcp Nixos vs Voyage Ai
If you are a Nix user seeking AI assistance for infrastructure, choose MCP-NixOS for its real-time, free data. If you are an enterprise building RAG on domain-specific documents (finance, legal), choose Voyage AI for its specialized embeddings and compliance features. They solve entirely different problems — your pick depends on your ecosystem.
GeneratedFrequently asked questions
Best-of guides
Topics
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