Pseolint MCP Server

The only tool purpose-built for programmatic SEO compliance. It shifts the unit of analysis from URL to template: point it at a 10,000-URL pSEO directory and pseolint identifies the template clusters (e.g. /listing/:slug, /category/:slug), samples K pages from each, and produces a per-template verdict + variance metric. Fix one template, fix N pages.

People who work with audit, linter and nextjs and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in HTML.

VERIFIED ACTIVE

LAST COMMIT 2026-09-14 · ★ 6 · #77 OF 168 MAINTAINED DEVELOPER TOOLS · VERIFIED 2026-09-18

MIT · HTML · how we verify → /methodology

01 · Install Pseolint

before you install - you'll need

Set PSEOLINT_BROWSER_WS, CRUX_API_KEY before connecting.

Claude Code

claude mcp add ouranos-labs-pseolint -- npx -y @pseolint/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "ouranos-labs-pseolint": {
      "command": "npx",
      "args": [
        "-y",
        "@pseolint/mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package @pseolint/mcp - the @pseolint scope differs from the repo owner (ouranos-labs); confirm it's the project's official package

registry namespace io.github.ouranos-labs is GitHub-verified and matches the repo owner

03 · What Pseolint can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.2.1 · 2026-04-18

Patch release. Fixes a real correctness bug in \--ai-daily-budget\ that landed in 0.2.0. · Fixed · Cache-hit double-count in daily budget. \todayTriageSpendUsd\ was re-counting \estimatedCostUsd\ from cached…

v0.2.0 · 2026-04-18

First minor release since initial publish. Full notes: CHANGELOG.md. · Headlines · AI triage · Opt-in post-processing layer that turns the findings list into 1–5 ranked root causes. 8 providers supported - install only…

04 · Who maintains Pseolint

pseolint is maintained by ouranos-labs. It's the only MCP server we track from this author; the repo dates to Apr 2026.

05 · Facts

repository: github.com/ouranos-labs/pseolint
website: https://pseolint.dev/
category: developer tools - ranked #77 of 168 actively-maintained developer tools servers as of 2026-09-18.
registry: io.github.ouranos-labs/pseolint (active, first published 2026-06-07)
packages: npm:@pseolint/mcp

06 · Pseolint FAQ

What is Pseolint?

Is Pseolint still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-14. We re-verify nightly.

How do I install Pseolint?

Run `npx -y @pseolint/mcp`. The README documents 2 environment variables (PSEOLINT_BROWSER_WS, CRUX_API_KEY) to set first. Set PSEOLINT_BROWSER_WS, CRUX_API_KEY before connecting. You can also paste the ready-made client config above.

Does Pseolint run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Pseolint

Alternatives to Pseolint

Maintained developer tools servers if Pseolint isn't the fit.

Pairs well with

Servers that cover what Pseolint doesn't - only shown when the pairing reason fits the companion.

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