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HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine MCP Server

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answering

HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine is answering right now. Last checked 12 min ago. It exposes 8 tools. Last commit 8 Nov 2026.

Look up French Horn F/Bb double horn valve fingerings, trigger combinations & partials.

Uptime history 62 hours of history · worst hour 0%
62 hours agonow
45.1%
Uptime 24h
41 of 91 checks
8
Tools
read from the server
146 ms
Response time
average over 24h
0
Stars
last commit 8 Nov 2026

What changed 10

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 8 November 2026. No other catalogue keeps this.

8 Nov 7 tools appeared analyze_horn_harmonic_series, diagnose_horn_intonation_and_hand_position, generate_daily_horn_warmup_routine and 4 more
8 Nov a tool changed version2 times that day
8 Nov a tool changed the parameters it asks for lookup_french_horn_fingering
and 1 more, back to 8 November 2026

HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine does not always answer

Over the last week it answered 69.4% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

run in your terminal
claude mcp add mcp --transport http https://hornlib.com/api/mcp
Settings → Connectors → Add custom connector, then paste this address
https://hornlib.com/api/mcp
~/.codex/config.toml
[mcp_servers.mcp]
url = "https://hornlib.com/api/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://hornlib.com/api/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://hornlib.com/api/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

lookup
lookup_french_horn_fingering
Look up standard F-side and Bb-trigger valve fingerings, concert pitch transposition (down a perfect fifth), and harmonic tendency notes for any written French Horn note (e.g. "C4", "F4", "G4", "Bb4", "C5", "F5").
lookup_horn_trill_fingering
Find optimal whole-tone and half-step trill fingerings on the F/Bb double horn, identifying whether a trill should be executed as a mechanical valve trill or a harmonic lip trill (common above written E5 on the F side).
analyze
analyze_horn_harmonic_series
Analyze the natural harmonic overtone series (partials 2 through 16) for any F-horn or Bb-horn valve combination, returning equal-temperament cent deviations (e.g. -14 cents on 5th partial, -31 cents on 7th partial) and alternate valve solutions.
diagnose
diagnose_horn_intonation_and_hand_position
Diagnose pitch tendencies, right-hand bell acoustics, and Stopped Horn (gestopft / +) transposition rules (transpose down a half-step on the F horn side to compensate for the +1/2 step acoustic shortening when sealing the bell).
generate
generate_daily_horn_warmup_routine
Generate a structured daily French Horn warm-up schedule covering harmonic lip slurs, Farkas long tones, double/triple tonguing, low-register pedal tones, and dynamic control tailored to available practice time.
orchestral
get_orchestral_horn_excerpt_guide
Retrieve audition preparation notes, recommended F/Bb trigger fingerings, breathing plans, and historical crook transpositions for standard orchestral French Horn excerpts (Mozart 4, Beethoven 3/7/9, Brahms 1/3, Mahler 5, Strauss Till Eulenspiegel / Ein Heldenleben, Tchaikovsky 5).
recommend
recommend_beginner_horn_and_mouthpiece
Compare Kruspe wrap (Conn 8D style, dark orchestral projection, larger bell throat) vs Geyer/Knopf wrap (Yamaha 667/671, Alexander 103 style, smooth slurs, medium throat) and recommend mouthpiece cup depths and rim diameters by player level.
transpose
transpose_french_horn_pitch
Transpose written French Horn parts from historical orchestral crooks (Horn in Eb, D, C, G, A, E, Bb-alto, Bb-basso) to modern Horn in F written pitch and Concert Pitch, with interval semitone shifts and clef rules.

Endpoints

URLTransportStateLatencyChecked
https://hornlib.com/api/mcp streamable-http answering 123 ms 12 min ago

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HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine — questions

Answers built from our own checks of this server.

What can HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine do?
It exposes 8 tools, read directly from the server on our last check. Among them: analyze_horn_harmonic_series, diagnose_horn_intonation_and_hand_position, generate_daily_horn_warmup_routine, get_orchestral_horn_excerpt_guide, lookup_french_horn_fingering, lookup_horn_trill_fingering and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 41 of 91 checks got a reply (45.1%), average response time 146 ms. The bar chart above shows every period we have measured.
How do I connect HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine need an API key?
No. HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine?
It answers our handshake in 146 ms on average, which is faster than 83% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is HornLib — Interactive French Horn F/Bb Double Horn Fingering & Harmonics Engine open source?
We cannot say either way: 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.