Open SEO Crawler vs Black SEO Analyzer
Open SEO Crawler is an MCP server published by puneetindersingh. Marketplaces we read that list it: 1 (Official MCP Registry). Black SEO Analyzer is an MCP server published by sethblack. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-11-05. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |   Open SEO Crawler |  Black SEO Analyzer |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Forks (GitHub): 23 Stars (GitHub): 80 Not marked · First seen |
Listed Version: 26.11.3 Forks (GitHub): 6 Stars (GitHub): 61 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Open SEO Crawler | Black SEO Analyzer |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 80 (better) | 61 (worse) |
| Forks (GitHub) (differs) | 23 (better) | 6 (worse) |
| Last release (differs) | Not published | 2026-11-04 |
| Where it runs (differs) | On your machine (https://github.com/puneetindersingh/open-seo-crawler/releases/download/mcp-v1.0.0/open-seo-crawler-mcp.mcpb) | On your machine (https://github.com/sethblack/black-seo-analyzer/releases/download/v26.11.3/bseoa-26.11.3-win32.mcpb) |
| Transport | stdio | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 1, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/puneetindersingh/open-seo-crawler | github.com/sethblack/black-seo-analyzer |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-16 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Open SEO Crawler
Self-hosted SEO crawler: run site audits and AI crawler checks, then read the issues and pages.
Black SEO Analyzer
Audit a page or crawl a whole site for technical SEO issues, locally. Compares crawls.
How to run each
Open SEO Crawler
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Black SEO Analyzer
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Requires: BLACK_SEO_ANALYZER_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of Open SEO Crawler publish no settings it asks for, so we do not compare settings.
What it can do: Open SEO Crawler · What it can do: Black SEO Analyzer · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.