Meridian MCP
Calibrated AI skill routing via orbital mechanics. An MCP server that picks the right expertise for every AI query. Deterministic scoring. 73 curated skills (hosted) or bring your own.
Install
Hosted (paid) — 30 seconds
Get an API key at ask-meridian.uk, then:
claude mcp add meridian https://api.ask-meridian.uk/mcp \
--transport http \
-H "Authorization: Bearer mrd_live_YOUR_KEY"
Works with Claude Code, Cursor, Windsurf, or any MCP client.
Self-hosted (free, OSS)
npm install -g meridian-skills-mcp
claude mcp add meridian meridian-mcp
Point at your own skill corpus:
MERIDIAN_SKILLS_ROOT=/path/to/your/skills meridian-mcp
See example-skills/ for the SKILL.md format.
What it does
Given a task description, returns the most relevant skills from a curated corpus — ranked by a deterministic physics-inspired scoring function (Roche limits, Lagrange points, Hill spheres). Each skill ships with route_score, class, and a why explanation.
Four MCP tools
| Tool | Purpose |
|---|---|
route_task(task, limit) | Rank skills by relevance to a task |
get_skill(slug) | Fetch full SKILL.md content |
list_skills() | Enumerate all available skills |
search_skills(query) | Full-text search with snippets |
Resources
Every skill is also exposed as an MCP resource: meridian://skills/<slug>.
Authoring skills
A skill is just a directory with a SKILL.md file:
---
name: your-skill-name
description: One-line description used by the router to score relevance.
---
# your-skill-name
Body content — instructions, patterns, examples. Kept under 2000 words for best routing.
Place under MERIDIAN_SKILLS_ROOT and the server picks it up on next request.
Architecture
┌─── stdio transport (local install)
MCP client ──► meridian-mcp
└─── HTTP Streamable transport (hosted)
┌─── skill_orbit.py (Python routing engine)
meridian-mcp ───► /opt/skills/
└─── 73+ SKILL.md files
The routing math is documented in the ArXiv paper (pre-print).
Pricing (hosted)
| Plan | Price | Quota |
|---|---|---|
| Free | $0 | self-hosted OSS |
| Pro | $29/mo | 10K tool calls/mo |
| Team | $149/mo | 100K calls/mo, 5 keys |
Contributing
PRs welcome for new example-skills/*, bug fixes, and transport improvements. For changes to the orbital-routing engine itself, please open an issue first.
License
MIT — see LICENSE.
Built in Buenos Aires. Run by World-ID-verified humans.