Penwright — writing-craft library, guide metadata, and magazine
REMOTE · PENWRIGHT.INK · SCANNED SEP 22
Read-only access to Penwright's writing-craft book library, grounded guide metadata (card-level...
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability78
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 403 tokens (~80/item across 5 items; 5 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management47
- Stability observed for 14 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Penwright — writing-craft library, guide metadata, and… MCP server?
Penwright — writing-craft library, guide metadata, and… is a hosted endpoint at https://penwright.ink/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · penwright.ink
claude mcp add --transport http ink-penwright-discovery 'https://penwright.ink/api/mcp'
{
"mcpServers": {
"ink-penwright-discovery": {
"url": "https://penwright.ink/api/mcp"
}
}
} {
"servers": {
"ink-penwright-discovery": {
"type": "http",
"url": "https://penwright.ink/api/mcp"
}
}
} [mcp_servers.ink-penwright-discovery] url = "https://penwright.ink/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"ink-penwright-discovery": {
"type": "remote",
"url": "https://penwright.ink/api/mcp",
"enabled": true
}
}
} openclaw mcp add ink-penwright-discovery --url 'https://penwright.ink/api/mcp' --transport streamable-http
mcp_servers:
ink-penwright-discovery:
url: "https://penwright.ink/api/mcp" {
"McpServers": {
"ink-penwright-discovery": {
"Transport": "http",
"Url": "https://penwright.ink/api/mcp"
}
}
} assistant mcp add ink-penwright-discovery -t streamable-http -u 'https://penwright.ink/api/mcp'
{
"mcpServers": {
"ink-penwright-discovery": {
"type": "http",
"url": "https://penwright.ink/api/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 22 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
- 16 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 12 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 10 Sept 26 0
- Schema quality: 354 → 403 ▼ functional
- Server version: 1.0.0 → 1.1.0 functional
- New tool “get_membership_offer” functional
- 9 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 78 → 88 ▼ functional
- Stability: unverified → 0.03 ▲ functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 22 Sept 2026 · Probed https://penwright.ink/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=penwright.ink | CN=YR1,O=Let's Encrypt,C=US | 29 Aug 2026 | 27 Nov 2026 | RSA 2048 | SHA256-RSA | 66a4a0e90223d03dae5eb6563aa5c30cdc9 |
| SANs: penwright.ink, www.penwright.ink | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of penwright.ink. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| ink. | present | 48370 | 8 | Verified |
| penwright.ink. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://penwright.ink/api/mcp | Verified | 200 | |
| http (plaintext) | http://penwright.ink/api/mcp | HTTPS enforced | 308 | https://penwright.ink/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
get_guide Get a grounded writing-craft guide's metadata ~104
Returns 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, ….
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | Guide slug (e.g. memoir-writing, fiction-writing, getting-published, self-publishing). |
| Name | Type | Req | Description |
|---|---|---|---|
| access | string | yes | – |
| books | number|null | yes | – |
| canonicalUrl | string | yes | – |
| contract | string | yes | – |
| guideType | string|null | yes | – |
| live | boolean | yes | – |
| readingTimeMin | number|null | yes | – |
| slug | string | yes | – |
| subtitle | string | yes | – |
| title | string | yes | – |
| updated | string|null | yes | – |
No examples provided.
get_library_work Get a writing-craft library work ~55
Returns one writing-craft library work's bibliographic record and (when profiled) its thesis.
| Name | Type | Req | Description |
|---|---|---|---|
| libraryId | string | yes | Library catalog id (e.g. libce6efaa49e6f0175). |
| Name | Type | Req | Description |
|---|---|---|---|
| author | string|null | yes | – |
| canonicalUrl | string | yes | – |
| contract | string | yes | – |
| libraryId | string | yes | – |
| logline | string|null | yes | – |
| pitch | string|null | yes | – |
| tags | array | yes | – |
| title | string | yes | – |
| year | number|null | yes | – |
No examples provided.
get_magazine_piece Get a multi-voice Writers'-Desk magazine piece ~74
Returns 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.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | Magazine piece slug. |
| Name | Type | Req | Description |
|---|---|---|---|
| canonicalUrl | string | yes | – |
| contract | string | yes | – |
| editor | object | yes | – |
| editorCoda | string | yes | – |
| format | string | yes | – |
| generated | string | yes | – |
| question | string | yes | – |
| sections | array | yes | – |
| slug | string | yes | – |
| title | string | yes | – |
No examples provided.
get_membership_offer Get the Bicycle Cooperative membership offer ~49
Returns 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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| api_version | string | yes | – |
| chapter | string | yes | – |
| join_url | string | yes | – |
| offer | object | yes | – |
No examples provided.
search_library Search the writing-craft library catalog ~82
Search or list Penwright's writing-craft book library by title/author substring and/or property tag. No filters returns the first page.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max rows to return (default 25, max 100). |
| query | string | – | Case-insensitive title/author substring. |
| tag | string | – | Case-insensitive property-tag substring. |
| Name | Type | Req | Description |
|---|---|---|---|
| contract | string | yes | – |
| count | number | yes | – |
| query | string|null | yes | – |
| results | array | yes | – |
| tag | string|null | yes | – |
| total | number | yes | – |
No examples provided.
What is the Penwright — writing-craft library, guide metadata, and… MCP server?
Penwright — writing-craft library, guide metadata, and… is an MCP server listed in the public MCP registry as ink.penwright/discovery. Read-only access to Penwright's writing-craft book library, grounded guide metadata (card-level... This page covers its hosted endpoint (https://penwright.ink/api/mcp).
Is the Penwright — writing-craft library, guide metadata, and… MCP server safe to use?
Penwright — writing-craft library, guide metadata, and… scores 81 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Penwright — writing-craft library, guide metadata, and… MCP server expose?
Penwright — writing-craft library, guide metadata, and… exposes 5 tools: search_library, get_library_work, get_guide, get_magazine_piece, get_membership_offer. Their descriptions and schemas cost roughly 364 tokens of context every time the server is loaded.
Does the Penwright — writing-craft library, guide metadata, and… MCP server require authentication?
No. We connected to Penwright — writing-craft library, guide metadata, and… without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Penwright — writing-craft library, guide metadata, and… MCP server still maintained?
Penwright — writing-craft library, guide metadata, and… is still listed as active in the MCP registry. We last reached this channel on 22 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.