Penwright — writing-craft library, guide metadata, and magazine
https://penwright.ink/api/mcp ↗
Description
Read-only access to Penwright's writing-craft book library, grounded guide metadata (card-level...
What our measurements say
Penwright — writing-craft library, guide metadata, and magazine is a remote MCP server published at penwright.ink. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 1,536 ms, a delay an agent will notice. It offers a narrow, focused set of 5 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names directly reflect their purpose (e.g., 'search_library', 'get_guide').
- No tool overlap; each has distinct functionality and data sources.
Weaknesses
- Descriptions for 'get_guide' and 'get_magazine_piece' list slugs but don't explain when to use them.
- Parameter constraints (e.g., slug format, tag validity) are not explicitly documented.
- Error handling (e.g., invalid slugs, missing libraryId) is not addressed in any tool.
search_library— Optional parameters lack default values (e.g., 'limit' has no implicit default).get_guide— Known slugs listed but no guidance on when to use the tool vs. 'get_magazine_piece'.get_membership_offer— Description is vague about the context of 'Bicycle Cooperative' and membership options.
Verdict
Event narrative
Sign up free to generateRaw observations
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 174ms → warm 167ms (penalty 7ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
search_librarySearch or list Penwright's writing-craft book library by title/author substring and/or property tag. No filters returns the first page.
querystringtagstringlimitinteger
get_library_workReturns one writing-craft library work's bibliographic record and (when profiled) its thesis.
libraryIdstringrequired
get_guideReturns one live guide's title, subtitle, access, book count, and reading time — card-level metadata only, never the paid body/depth content. Known slugs (21): memoir-writing, nonfiction-writing, fiction-writing, getting-published, self-publishing, book-marketing, design-a-publication, typography-and-layout, ….
slugstringrequired
get_magazine_pieceReturns one published magazine piece's question, per-writer sections, and editor's coda — the same content the human page renders, ungated. Known slugs (1): the-whole-room--my-memoir-keeps-stalling-i-can-write-scenes.
slugstringrequired
get_membership_offerReturns the Writing chapter of the Bicycle Cooperative membership offer: five options (enterprise member, practitioner member, worker, practitioner rent, enterprise rent) with chapter substitution applied and this front's join URL.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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