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 connecting developer tools tools to Claude, Cursor, VS Code, or another MCP client. The project is written in HTML.

VERIFIED ACTIVE

LAST COMMIT 2026-08-24 · ★ 6 · #64 OF 139 MAINTAINED DEVELOPER TOOLS · VERIFIED 2026-08-25

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 #64 of 139 actively-maintained developer tools servers as of 2026-08-25.
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 2026-08-25, its last commit was 2026-08-24. 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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