# caelus-mcp

34-tool Caelus MCP for validated astrology: charts, transits, Vedic, facts, sky view, synthetic.

- **Type:** MCP server
- **Trust:** 60/100 (B), scored on the package rubric
- **Verification:** community-indexed — nobody has claimed this listing
- **Version:** 0.24.1
- **Author:** io.github.heavyblotto
- **License:** MIT
- **npm:** caelus-mcp
- **Endpoints:** streamable-http https://www.ephemengine.com/api/mcp
- **Source:** https://github.com/heavyblotto/caelus
- **Endpoint health:** reachable (last checked 2026-08-26T09:59:48.570Z, 1 sample) — uptime is not a security property and is not part of the trust score
- **Compatible clients:** claude-code, cursor, copilot, chatgpt, gemini (basis: transport)

## Trust

60/100 (B), scored on the package rubric
- Publisher verified: no
- Install scripts: nothing suspicious found
- Prompt-injection scan: not run
- Obfuscation scan: not run
- Evidence age: 73 days

## Security scan

- **Status:** clean
- **Scanned:** 2026-06-17T05:15:52.223Z
- **Version scanned:** 0.19.0
- **CVEs:** none found by OSV at scan time

## Tools

29 declared. Statically extracted from the shipped source — a floor on the surface, not a census.
- `natal_chart`
- `current_sky`
- `transits`
- `synastry`
- `find_aspect_dates`
- `rectification_grid`
- `sky_events`
- `planetary_hours`
- `void_of_course`
- `returns`
- `progressions`
- `composite`
- `dignities`
- `lots`
- `profections`
- `firdaria`
- `releasing`
- `directions`
- `nakshatras`
- `dasha`
- `vargas`
- `yogas`
- `aspect_patterns`
- `chart_signature`
- `chart_facts`
- `counterfactual_chart`
- `similar_skies`
- `electional_search`
- `cosmic_weather`

## Install

**Verdict: review** — Installable, but 1 thing to check first: No publisher has proved control of this listing; it is indexed, not vouched for.
**Cautions** (coverage gaps and advisories — never blocking)
- No publisher has proved control of this listing; it is indexed, not vouched for.
**Config** (claude-code):
```json
"{\n  \"mcpServers\": {\n    \"caelus\": {\n      \"command\": \"npx\",\n      \"args\": [\n        \"-y\",\n        \"caelus-mcp\"\n      ]\n    }\n  }\n}"
```

## Blast radius

Contained to moderate — no credential declaration found, from the publisher, the upstream registry, or the README. Known so far: runs locally and hosted; read-only tool surface.
- Floor 15, ceiling 33 (tier: unknown)
- `unknown` means the floor and ceiling land in different bands — not measured enough to name one. It does not mean low.
- This is impact, not likelihood. A high radius is not a defect: a filesystem server is supposed to write files. It is never part of the trust score.

## Machine-readable views of this entry

- Signed JSON: https://forgeregistry.com/api/v1/packages/caelus-mcp
- Install plan: https://forgeregistry.com/api/v1/packages/caelus-mcp/install-plan
- Alternatives: https://forgeregistry.com/api/v1/alternatives/caelus-mcp
- HTML page: https://forgeregistry.com/registry/caelus-mcp
- MCP: POST https://forgeregistry.com/api/mcp → `forge_get_package` / `forge_install_plan`

## About this document

Generated by Forge (https://forgeregistry.com) — a compact rendering of the same record served, signed, at the JSON URL above. Trust and scan facts are the registry's own measurements; anything Forge did not measure is named as unmeasured rather than omitted.