Eldertongue MCP

A remote MCP server providing read-only access to the Eldertongue Old English dictionary. It enables LLM agents and editors to perform headword lookups, retrieve inflection tables, identify forms, convert Modern English to Old English, and access Beowulf verse citations via structured JSON responses.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-06Published by gowinder

MCP endpoint (Streamable HTTP)

https://eldertongue.com/mcp

Vendor documentation

What its tools do

5 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (5)

lookup_headword
inflect
identify_form
english_to_old_english
beowulf_occurrences

5 of 5 have a description · 0 of 5 declare behavior hints · 5 of 5 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 11:18 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Look up Old English headword definitions and citations
Retrieve full inflection tables for Old English words
Convert Modern English words to their Old English equivalents
Find occurrences of words in the Beowulf poem

Source and maintenance

Community listingRegistry 1.0.0

mcp-registry: io.github.gowinder/eldertongue@1.0.0 Source repository Project website

Maintenance checked: Nov 6, 2026, 11:15 PM UTC

Protocol and capabilities

Server: eldertongue 1.0.0
MCP protocol negotiated in check: 2025-06-18
Tools: 5 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

eldertongue is a read-only Old English dictionary: look up headwords, print inflection tables, analyse inflected forms, map modern English to Old English, and find a word's lines in Bēowulf. Every result includes the eldertongue.com page URL(s) it came from — cite them so readers can follow along. Data is CC BY-SA 4.0 (Wiktionary and eldertongue.com). No authentication, no writes.

Tools

5 advertised

lookup_headword — Look up an Old English headword

Advertised by the server during the last successful anonymous check.

Look up an Old English headword (macrons optional) in the eldertongue dictionary. Returns senses, IPA, syllables, part of speech, gender, noun declension / verb class, etymology, and the eldertongue.com page URL.

lookup_headword input schema

{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "word": {
      "type": "string",
      "examples": [
        "cyning"
      ],
      "description": "Old English headword, macrons optional (e.g. cyning, cyninges, scieppan)."
    }
  },
  "additionalProperties": false
}

inflect — Inflection table for an Old English headword

Advertised by the server during the last successful anonymous check.

Return the full declension (nouns/adjectives) or conjugation (verbs) table for an Old English headword. Every word form carries an anchor URL into the eldertongue.com entry page.

inflect input schema

{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "word": {
      "type": "string",
      "examples": [
        "cyning"
      ],
      "description": "Old English headword whose paradigm to show (e.g. cyning, gōd, bindan)."
    }
  },
  "additionalProperties": false
}

identify_form — Identify an inflected Old English form

Advertised by the server during the last successful anonymous check.

Given any inflected form (e.g. cyninges, band, gōdra), return the headwords it could belong to and the grammatical reading (case, number, gender, person, tense, mood…) of each.

identify_form input schema

{
  "type": "object",
  "required": [
    "form"
  ],
  "properties": {
    "form": {
      "type": "string",
      "examples": [
        "cyninges"
      ],
      "description": "Inflected Old English form to analyse."
    }
  },
  "additionalProperties": false
}

english_to_old_english — Modern English → Old English

Advertised by the server during the last successful anonymous check.

Given a modern English word (e.g. king, ship, write), list Old English headwords whose definitions mention it, with a score, part of speech, gloss, and the eldertongue.com page URL for each.

english_to_old_english input schema

{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "word": {
      "type": "string",
      "examples": [
        "cyning"
      ],
      "description": "Modern English word to translate back into Old English."
    }
  },
  "additionalProperties": false
}

beowulf_occurrences — Where a word occurs in Bēowulf

Advertised by the server during the last successful anonymous check.

Given an Old English headword, return every line of Bēowulf that carries it: the line numbers, the line text, the spellings used, and a link to the poem line on eldertongue.com.

beowulf_occurrences input schema

{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "word": {
      "type": "string",
      "examples": [
        "cyning"
      ],
      "description": "Old English headword to locate in Bēowulf (e.g. cyning, hilde)."
    }
  },
  "additionalProperties": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

2026-11-07: 2 of 2 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 309 ms
95th percentile latency: 309 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 11:18 PM UTC · probe · passed · 309 ms · metadata changed · 5 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http eldertongue-mcp https://eldertongue.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add eldertongue-mcp --url https://eldertongue.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable eldertongue-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "eldertongue-mcp": {
      "url": "https://eldertongue.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "eldertongue-mcp": {
      "type": "streamableHttp",
      "url": "https://eldertongue.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start eldertongue-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "eldertongue-mcp": {
      "type": "http",
      "url": "https://eldertongue.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http eldertongue-mcp https://eldertongue.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://eldertongue.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "eldertongue-mcp": {
      "serverUrl": "https://eldertongue.com/mcp"
    }
  }
}

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