Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@parseltongue-claude audit README.md for hallucinated claims"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
MCP server + skill for Parseltongue hallucination detection in Claude Code.
# 1. Install
uv pip install -e .
# 2. Add MCP server
claude mcp add --transport stdio parseltongue -- $(pwd)/run-server.sh
# 3. Install skills
mkdir -p ~/.claude/skills
ln -s $(pwd)/skills/parseltongue ~/.claude/skills/parseltongue
ln -s $(pwd)/skills/parseltongue-review ~/.claude/skills/parseltongue-review
# 4. Restart Claude Code, then:
/parseltongue [document] What are the key claims?
/parseltongue-review README.md # audit your own docsRelated MCP server: codex-fusion-mcp
Inverts Parseltongue's architecture: instead of Parseltongue calling an LLM API, Claude Code becomes the LLM and calls Parseltongue for verification.
Original: You → Parseltongue → LLM API → DSL → Verify
This: You → Claude Code → Parseltongue MCP → VerifyEvery claim must cite a verbatim quote. Misquotes are flagged as hallucinations.
/parseltongue — Grounded document analysis
Analyze external documents with provable claims. Every fact traces to a verbatim quote.
/parseltongue [SEC filing] Are there revenue recognition red flags?/parseltongue-review — Documentation audit
Audit docs for accuracy, duplication, and consistency with source.
/parseltongue-review README.md # vs upstream, find duplicated content
/parseltongue-review docs/ # audit mkdocs siteTool | Description |
| Create verification session |
| Register source document |
| Load DSL and verify quotes |
| Full consistency check |
| Get DSL docs |
See upstream Parseltongue docs for DSL syntax and examples.
uv pip install -e ".[dev]" # install
uv run pre-commit install --hook-type commit-msg --hook-type pre-commit
uv run pytest # test (80% coverage)
uv run ruff check --fix . && uv run ruff format . # lint + format
uv run cz commit # conventional commitApache-2.0
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If you are the server author, to access and configure the admin panel.
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