Astral MCP

Name: Astral MCP
Author: davidmosiah

by davidmosiahversion 0.2.0i★ –iRuns on your computer

Registry nameio.github.davidmosiah/astral-mcp

Install

Overview

Description from the maker (original English)

Precision-audited astrology MCP: natal charts, transits, synastry, moon phases. No API key.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 96/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Astrology & auspicious dates

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: ASTRAL_MCP_TRANSPORT, ASTRAL_MCP_HOST, ASTRAL_MCP_PORT, ASTRAL_MCP_ALLOWED_ORIGIN

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "astral": {
      "command": "npx",
      "args": [
        "-y",
        "astral-mcp"
      ],
      "env": {
        "ASTRAL_MCP_TRANSPORT": "your-value",
        "ASTRAL_MCP_HOST": "your-value",
        "ASTRAL_MCP_PORT": "your-value",
        "ASTRAL_MCP_ALLOWED_ORIGIN": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add astral --env ASTRAL_MCP_TRANSPORT=your-value --env ASTRAL_MCP_HOST=your-value --env ASTRAL_MCP_PORT=your-value --env ASTRAL_MCP_ALLOWED_ORIGIN=your-value -- npx -y astral-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "astral": {
      "command": "npx",
      "args": [
        "-y",
        "astral-mcp"
      ],
      "env": {
        "ASTRAL_MCP_TRANSPORT": "your-value",
        "ASTRAL_MCP_HOST": "your-value",
        "ASTRAL_MCP_PORT": "your-value",
        "ASTRAL_MCP_ALLOWED_ORIGIN": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "astral": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "astral-mcp"
      ],
      "env": {
        "ASTRAL_MCP_TRANSPORT": "your-value",
        "ASTRAL_MCP_HOST": "your-value",
        "ASTRAL_MCP_PORT": "your-value",
        "ASTRAL_MCP_ALLOWED_ORIGIN": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

ASTRAL_MCP_TRANSPORT env
Transport to run. Defaults to stdio. Set to http to expose a streamable HTTP endpoint instead.
ASTRAL_MCP_HOST env
Host to bind when ASTRAL_MCP_TRANSPORT=http. Defaults to 127.0.0.1.
ASTRAL_MCP_PORT env
Port to bind when ASTRAL_MCP_TRANSPORT=http. Defaults to 3000.
ASTRAL_MCP_ALLOWED_ORIGIN env
Allowed CORS origin for the HTTP transport. Defaults to the bound host:port.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account davidmosiah, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Astrology & auspicious datesi

More stars than 0% of the other 116 servers in this category
Published to the registry more recently than 4% of the other 116 servers in this category
Basic checks equal to or better than 100% of the other 116 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Astral MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: NumeroClaw, Yinyang Masters, Homo Universalis — 7 Wisdoms (BaZi, Tarot, Vedic Jyotish, Mayan, I-Ching, Human…

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

NumeroClaw

Order a personalized numerology reading, paid by the person and delivered by email.

by numeroclaw.comEarlyUpdated yesterday

Runs in the cloud✓ numeroclaw.com

Install

Yinyang Masters

Tarot, astrology, numerology, Tu Vi and Bazi tools plus guides on habits and manifestation.

by gemral-edgeEarlyUpdated 2 days ago

Runs in the cloud

Install

Homo Universalis — 7 Wisdoms (BaZi, Tarot, Vedic Jyotish, Mayan, I-Ching, Human…

Deterministic 7-Wisdoms (BaZi, Tarot, Vedic Jyotish, Mayan, I-Ching, Human Design, Kabbalah) MCP.

by David-Porto-BaraldesVery newUpdated 2 days ago

Runs in the cloud✓ homouniversalis.ai

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Astral MCP

Give your AI agent real astrology — natal charts, transits, synastry & moon phases.

Computed locally, cross-checked by two independent ephemerides . No API key, no account.

⚡ Zero-setup install. Wire it into Claude Desktop / Cursor / Hermes and call it immediately — no API key, no OAuth, no account:

npx -y astral-mcp

A local-first MCP server that turns birth data into a full, precision-audited astrological reading for AI agents. Stateless and computational — nothing is stored, no credentials exist, and every tool but optional geocoding runs fully offline.

Astral MCP is Delx's focused astrology product. See the Delx platform map for its boundary with the separate Protocol, Security, Wellness and Commerce properties.

Built by David Mosiah. The astrology engine is ported from the Alkhemia app.

New to the protocol pattern? Read [What Is an Astrology MCP Server?](https://astral.delx.ai/guides/what-is-an-astrology-mcp-server) for the separation between deterministic chart computation and model interpretation, the recommended agent workflow, and the precision/privacy boundaries.

Ready to calculate one? Follow [How to Generate a Natal Chart with MCP](https://astral.delx.ai/guides/how-to-generate-a-natal-chart-with-mcp) for the exact birthplace, timezone, unknown birth-time, payload and precision-audit workflow.

Handling sensitive inputs? Read [How to Protect Birth Data in Astrology Agent Workflows](https://astral.delx.ai/guides/how-to-protect-birth-data-in-astrology-agent-workflows) for payload minimization, local computation, the optional OpenStreetMap boundary and the limits of privacy_mode=summary.

Why this exists

Most astrology libraries are fragile single-engine wrappers, and most "astrology APIs" want a key and a subscription. Agents need something they can trust and call instantly. Astral MCP does two things differently:

It just works. npx -y astral-mcp and you're calling charts — no OAuth, no account, no birthplace database to install.
It checks itself. Every natal chart is computed with one ephemeris and then independently re-derived, planet by planet, with a second one. If they disagree beyond a tight tolerance, the chart is flagged review instead of silently returning a wrong placement.

Setup in 60 seconds

Add it to your MCP client (Claude Desktop, Cursor, Hermes, …):

"mcpServers": { "astral": { "command": "npx", "args": ["-y", "astral-mcp"] } } }

That's the whole setup. There is nothing to authenticate.

Run it directly if you want:

npx -y astral-mcp                      # stdio (default)

ASTRAL_MCP_TRANSPORT=http npx -y astral-mcp # streamable HTTP on 127.0.0.1:3000

See it before you connect

Call `astral_demo` for a fully-worked example chart (Greenwich, noon, Y2K) including its precision audit — no input, no network, no auth. It shows you the exact payload shape before you send real birth data.

Try it with your agent

"What's my natal chart? I was born 23 Feb 1989, 14:30, in Fortaleza, Brazil."

The agent calls astral_search_birthplace to resolve Fortaleza → lat/lon/timezone, then astral_compute_natal_chart.

"Any big transits hitting my chart this week?" → astral_current_transits

"How compatible are we?" (two birth datas) → astral_synastry

"What phase is the moon in today?" → astral_moon_phase

Precision

Astral MCP ships every natal chart with a precision audit. The primary engine (circular-natal-horoscope-js) computes the chart; the verifier (astronomy-engine) re-derives each planet's ecliptic longitude independently. A chart is verified only when every planet agrees within tolerance and lands in the same sign.

Across a built-in accuracy suite of charts spanning 1945–2010 and six timezones, the worst cross-engine disagreement is under 0.01°. Run it yourself:

npm run test:accuracy

Data availability

Capability	Supported
Planets (Sun…Pluto), Ascendant, MC/IC	✅
Houses (placidus, koch, campanus, regiomontanus, topocentric, equal-house, whole-sign)	✅
Major aspects with orb, strength, applying/separating	✅
Chart signature (dominant element/modality, pattern, stelliums, angular planets)	✅
Retrogrades · timezone/DST handling	✅
Transits (current + upcoming) · moon phase	✅
Synastry (two-chart comparison, scored)	✅
Tropical & sidereal zodiac	✅
Lunar nodes, Chiron, asteroids, fixed stars	⏳ planned
Minor aspects	⏳ planned
Interpretation text	❌ by design — astral-mcp returns structured data; your model writes the reading

Tools

astral_compute_natal_chart — full natal chart, precision-audited by default
astral_current_transits — current + upcoming transits to a chart, with moon phase
astral_synastry — compare two charts (harmony / chemistry / communication / growth)
astral_moon_phase — moon phase, sign and illumination for any date
astral_search_birthplace — geocode a place to latitude / longitude / timezone
astral_demo — worked example chart, no input needed
astral_capabilities — what this server supports and what it doesn't
astral_data_inventory — data domains and recommended first calls
astral_agent_manifest — install + usage rules for agents
astral_connection_status — health check via a sample chart + dual-engine audit

The three chart tools (astral_compute_natal_chart, astral_current_transits, astral_synastry) take a `privacy_mode` parameter — a payload-verbosity axis separate from response_format:

full (default) — the complete payload, including the per-planet precision audit
structured — same structure, redundant/derivable fields dropped
summary — only the high-signal essentials (luminaries + Ascendant, chart signature, top aspects)

A full Greenwich natal payload is ~6.9 KB; summary is ~1.2 KB (~80% smaller), so an agent that only needs a quick read can ask for less and spend fewer tokens.

Notes for accurate readings

Pass the birthplace timezone, not the caller's. astral_search_birthplace returns it.
birth_time is optional. Without it, noon is assumed: planet signs stay accurate, but the Ascendant and houses are unreliable.

Privacy & Security

Astral MCP stores nothing and holds no secrets. The only optional network call is astral_search_birthplace (OpenStreetMap), which sends just the place-name string you pass. See SECURITY.md.

Contributing

The computation core in src/engine/ is ported from Alkhemia — keep it framework-free. See AGENTS.md for the development rules and the test gate (npm test).

License

MIT — see LICENSE.

HTTP (v2 stateless)

Default is stdio. Optional Streamable HTTP — no session id, JSON responses, loopback only:

npx -y astral-mcp --http

GET http://127.0.0.1:3000/health

POST http://127.0.0.1:3000/mcp (sessionless)

Env: ASTRAL_MCP_HOST, ASTRAL_MCP_PORT, ASTRAL_MCP_TRANSPORT=http.

Skill or MCP

npx -y astral-mcp call astral_connection_status --json '{}'

Astral MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Astrology & auspicious datesi

Common questions

Alternatives

NumeroClaw

Yinyang Masters

Homo Universalis — 7 Wisdoms (BaZi, Tarot, Vedic Jyotish, Mayan, I-Ching, Human…

README from the maker

Why this exists

Setup in 60 seconds

See it before you connect

Try it with your agent

Precision

Data availability

Tools

Notes for accurate readings

Privacy & Security

Contributing

License

HTTP (v2 stateless)

GET http://127.0.0.1:3000/health

POST http://127.0.0.1:3000/mcp (sessionless)

Skill or MCP