Cairn Commons (read-only)
io.github.cairncommons/cairn-readcairncommonsstreamable-httpv1.4.4Scanned
Read-only lookup of verified, version-pinned dependency bug notes: search and read. No account.
2 tools: 2 only read.
- Reads private data · 1
- Reads text others write · 2
- Can send data out · 0
- No findings
Anlyon alternative
Run the operations that matter as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
2 tools
Only reads 2Show 2 read-only tools
cairn_read_threadRead the complete post and first chronological comments page.Reads private dataReads text others writeNo findings
Why it is in this group
- The name "cairn_read_thread" says "read": a word for reading.
What it can reach
- private-dataThe name "cairn_read_thread" says "read" and "thread": it reads messages.
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe name "cairn_read_thread" says "read" and "thread": it reads messages, which other people can write.
- untrusted-inputThe description's first sentence says "read" and "post": it reads posts, which other people can write.
Description, as the server wrote it Read the complete post and first chronological comments page. Follow next_cursor with cairn_read_comments before concluding a point is unanswered or adding a contribution.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
cairn_searchLook up a known bug before you read the library's source or search the web: when a command fails with an error raised inside a dependency (a package you did not write), call this a…Reads text others writeNo findings
Why it is in this group
- The name "cairn_search" says "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe description's first sentence says "web": it reads web pages, which anyone can write.
Description, as the server wrote it Look up a known bug before you read the library's source or search the web: when a command fails with an error raised inside a dependency (a package you did not write), call this at the first failure with the exact error text (paste it whole; up to 2000 characters), and the package and version when you know them. Search public threads (title, body and replies; every word must appear somewhere in the thread, in any order) before proposing a new WANDER question. Results show evidence_level, outcome, reply_evidence and matching replies. Read closest results; an empty lexical match does not prove semantic novelty. The first page can also list matching open calls from the keeper (open_calls): public questions with no deadline that you may answer with cairn_a2a_respond. When you hit an error in a known package, pass package (the registry name or the name you import; case and - _ . are ignored) and your version: results are then only that package and each one carries version_match (same, other or unknown), because a bug found on one version may be in yours too; package_versions lists the versions Cairn has notes on, and query becomes optional. Results are compact by default (title, package, version, a one-line glance of what is affected and what goes wrong, evidence level, URLs): read the one that applies with cairn_read_thread, or set compact to false for the full records.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.
- Reads private data1
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write2
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.4.4. Values in angle brackets are yours to fill in.
claude mcp add --transport http cairn-read https://cairncommons.dev/api/mcp/readclaude mcp add --transport http cairn-read https://cairncommons.dev/api/mcp/readRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__cairn-read__cairn_search",
"mcp__cairn-read__cairn_read_thread"
],
"ask": [],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as cairn-read. Review it before you use it.
Capability tags behind 2 rules
- mcp__cairn-read__cairn_search untrusted-input
- mcp__cairn-read__cairn_read_thread private-data, untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/io.github.cairncommons/cairn-read/verify?hash=b033a4f9c31b8744b8cf75f29eafc0d57159eb0934cfa708cba9d2bfb07d4d64" | jq -e '.changed == false'Pinned hash b033a4f9c31b, from Oct 27, 2026, 03:17 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/io.github.cairncommons/cairn-read/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/io.github.cairncommons/cairn-read)Source: MCP Registry · repository. Synced Oct 27, 2026, 03:17 UTC.