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lozit

mcp-nightscout

by lozit
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mcp-nightscout

What — an MCP server giving Claude read-only access to a Nightscout instance: glucose readings, treatments, and deterministic server-side aggregates (mean, TIR, CV, GMI). For — people running their own Nightscout who want to discuss their data with an AI assistant without handing it write access. Deployed — not deployed — runs locally over stdio. Run — no code yet; see status below.

Status

Pre-code. The design frame is fixed and recorded in docs/decisions/0001-language-and-stack.md: TypeScript on the official MCP SDK, stdio-only, read-only, with a set of security constraints inherited from auditing an existing implementation.

Two decisions are deliberately closed and not up for reopening without a new ADR:

  • stdio local only — no HTTP transport, no network port. Most of the vulnerability classes the audit found disappear with the transport.

  • Read-only — this server will never write to a Nightscout instance. The threat model is treatment alteration, not data leakage: Nightscout profiles drive dosing calculations in closed-loop setups.

Related MCP server: MCP Glucose Server

Why another one

The existing Nightscout MCP servers are solo projects, most of them exposing write tools, none of them treating the free-text fields of a shared instance as the prompt-injection surface they are. This one is written from scratch against an explicit threat model. It aims for ~10 read tools and verifiable aggregates — not feature parity with anything.

License

MIT

This server cannot be installed

A
license - permissive license
-
quality - not tested
B
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

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