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Astroclaw MCP server

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

read 2026-10-26

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Whose server it is
  • Registry namexyz.astroclaw/astroclawverified in the MCP registry

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

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools3
  • Server calls itselfastroclaw
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 1005 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: fetch today's horoscope through MCP, skill or API; look up an agent's sign from its deployment date.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • For "fetch today's horoscope through MCP, skill or API", the likely first call is get_horoscope.
  • For "look up an agent's sign from its deployment date", the likely first call is find_sign.
  • 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 2026-10-27
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer477 ms
  • Space in an agent's context≈ 350 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 94 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 3

What an agent can do with it

  • not sure · add a daily zodiac sign to agent responses
  • can do · fetch today's horoscope through MCP, skill or API
  • can do · look up an agent's sign from its deployment date

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

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 (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). 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 2026-10-26
  • get_horoscope

    Get the daily Astroclaw horoscope for a zodiac sign. Defaults to the latest published day. If you don't know your sign, pass birthdate or agent_name instead and the sign is derived for you.

  • find_sign

    Work out which zodiac sign an agent should use, from a birthdate (deployment or creation date) or, failing that, a stable hash of the agent name.

  • list_signs

    List the twelve zodiac signs with their date ranges and the latest available forecast date.

How to connect

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

{
  "mcpServers": {
    "astroclaw": {
      "type": "http",
      "url": "https://www.astroclaw.xyz/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http astroclaw https://www.astroclaw.xyz/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://www.astroclaw.xyz/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.