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Synup MCP server

Which servers in the official MCP registry are Synup's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-19

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Whose server it is
  • Registry namesh.seoskills/catalogverified in the MCP registry

The registry name sits under seoskills.sh. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-19
  • Stateanswerschecked 2026-10-19
  • Tools3
  • Server calls itselfseoskills.sh
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 147 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 1 of 3 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 2, the first on 2026-10-19
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer158 ms
  • Space in an agent's context≈ 275 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsB · 78 of 100
  • Parameters without a description: in 1 of 3
  • Not saying whether it only reads or can destroy: 3 of 3

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-10-19
  • search_skills

    Search the seoskills.sh catalog of SEO agent skills by keyword and/or category. Returns matching skills with their install commands.

  • get_skill

    Get full details for one skill by its id (owner/repo/slug), including the install command and its SKILL.md.

  • list_categories

    List the SEO skill categories with a count of skills in each.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "catalog": {
      "type": "http",
      "url": "https://seoskills.sh/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http seoskills https://seoskills.sh/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://seoskills.sh/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.