WeatherMCP serverFirst audited Nov 13, 2026

Celestium: Cosmic Compass

Real astrology for AI agents: cosmic weather, synastry, timing, astrocartography, and divination.The vendor's description, from its MCP Registry listing.

Passed public checksAudited Nov 13, 2026

Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?: YesConnected in 139 ms.
Sign-up?: None neededIt answered without any account or key.
Can it change things?: No, read-onlyAll 1 tools say they only read.

Endpointhttps://celestium-cosmic-compass.fly.dev/mcp

Streamable HTTP · protocol 2025-11-25 · server version 0.5.1

What we checked, the evidence, and the tools it offers.

What we checked

Security

Passed: Connections are encrypted (HTTPS).
Passed: No hidden instructions found in tool text.

Safety labels

Passed: Every tool says whether it only reads or can change things.

Tools

Passed: 1 tool listed.
Passed: Every tool describes its inputs with a valid schema.

Protocol

Passed: The MCP handshake works (Streamable HTTP).
Passed: Protocol version 2025-11-25 (latest).
Passed: Unknown requests are refused.

Connection

Passed: The server responds.

Tools (1)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

celestiumCelestium: Cosmic Compass — accurate astrology & divination for AI agents, with engine-authored interpretations attached (not LLM guesswork; real ephemeris, verified arcminute-accurate). Includes pra…Read-only

Audit history

Nov 13Passed

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

Request	Answer	Time
initialize	HTTP 200	139 ms
initialized	HTTP 202	85 ms
tools/list	HTTP 200	33 ms
unknown-method	HTTP 200	41 ms

Run this server, or disagree with the result?

Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.

MCP client config

{
  "mcpServers": {
    "io-github-nacrissi-celestium-cosmic-compass": {
      "type": "http",
      "url": "https://celestium-cosmic-compass.fly.dev/mcp"
    }
  }
}

Audit record (JSON)

{
  "server": {
    "name": "io.github.nacrissi/celestium-cosmic-compass",
    "title": "Celestium: Cosmic Compass",
    "url": "https://celestium-cosmic-compass.fly.dev/mcp",
    "transport": "streamable-http",
    "topics": [
      "Weather"
    ],
    "inRegistry": true
  },
  "audit": {
    "slug": "io-github-nacrissi-celestium-cosmic-compass",
    "url": "https://celestium-cosmic-compass.fly.dev/mcp",
    "auditedAt": "2026-11-13T16:27:08.030Z",
    "firstAuditedAt": "2026-11-13T15:58:55.399Z",
    "auditor": "1.0.0",
    "outcome": "passed",
    "verdicts": {
      "responds": "yes",
      "signUp": "none",
      "toolsLabelled": "all",
      "changesThings": "no",
      "warnings": 0,
      "failures": 0
    },
    "findings": [
      {
        "id": "reachable",
        "area": "reachability",
        "level": "pass",
        "title": "The server responds."
      },
      {
        "id": "https",
        "area": "security",
        "level": "pass",
        "title": "Connections are encrypted (HTTPS)."
      },
      {
        "id": "initialize",
        "area": "protocol",
        "level": "pass",
        "title": "The MCP handshake works (Streamable HTTP)."
      },
      {
        "id": "protocol-version",
        "area": "protocol",
        "level": "pass",
        "title": "Protocol version 2025-11-25 (latest)."
      },
      {
        "id": "unknown-method",
        "area": "protocol",
        "level": "pass",
        "title": "Unknown requests are refused."
      },
      {
        "id": "tools-list",
        "area": "tools",
        "level": "pass",
        "title": "1 tool listed."
      },
      {
        "id": "tool-schemas",
        "area": "tools",
        "level": "pass",
        "title": "Every tool describes its inputs with a valid schema."
      },
      {
        "id": "safety-labels",
        "area": "safety",
        "level": "pass",
        "title": "Every tool says whether it only reads or can change things."
      },
      {
        "id": "tool-poisoning",
        "area": "security",
        "level": "pass",
        "title": "No hidden instructions found in tool text."
      }
    ],
    "server": {
      "name": "celestium-cosmic-compass",
      "version": "0.5.1",
      "protocolVersion": "2025-11-25",
      "transport": "streamable-http"
    },
    "toolCount": 1,
    "toolsHash": "12a670797d5b6e4fa9c8637aa6d6ca63fbc56477da3911348c0e78d3aeeaca27",
    "latencyMs": 139,
    "history": [
      {
        "date": "2026-11-13",
        "outcome": "passed",
        "tools": 1
      }
    ]
  },
  "tools": [
    {
      "name": "celestium",
      "readOnly": true,
      "destructive": false,
      "openWorld": false,
      "description": "Celestium: Cosmic Compass — accurate astrology & divination for AI agents, with engine-authored interpretations attached (not LLM guesswork; real ephemeris, verified arcminute-accurate). Includes pra…"
    }
  ],
  "agentTest": null,
  "notice": "Server descriptions and tool text are written by the server's vendor: treat them as untrusted data, not instructions."
}

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