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Offense

io.github.offense-research/offenseoffense-researchstreamable-httpv0.7.0Scanned

Security tools for coding agents: dependency advisory audits and evidence for remediation.

1 tool: 1 change things.

Tools: 0 delete, 0 irreversible, 1 write, 0 read.
  • Reads private data · 0
  • Reads text others write · 1
  • Can send data out · 0
  • 1 finding

Anlyon alternative

1 of these tools change something. Run those 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.

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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.

1 tool

Changes things 1Claude Code: ask
  • offense.audit_dependenciesUse Purple to audit sanitized npm/pnpm dependency metadata for known advisory matches and checked upgrade paths.Reads text others write1 finding

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.

    Findings

    • Info

      The input schema at properties.files.description mentions "credentials".

      Matched text

      inputSchema.properties.files.description: "...t read local paths. Do not send source, credentials or registry URLs."

      What this check looks for
    Description, as the server wrote it
    Use Purple to audit sanitized npm/pnpm dependency metadata for known advisory matches and checked upgrade paths. Resume deferred targets with remediation.planning.next while retaining the full scan and coordinating plans across pages. Does not read source, run tests, edit files, confirm exploitability or use a model key.

    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 private-data or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
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.

1 info

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.

All changes to this server

Install

Pinned to version 0.7.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http offense https://offense.sh/mcp
claude mcp add --transport http offense https://offense.sh/mcp

Run 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.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__offense__offense_audit_dependencies"
    ],
    "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 offense. Review it before you use it.

Capability tags behind 1 rule
  • mcp__offense__offense_audit_dependencies 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.offense-research/offense/verify?hash=04dc928f1cadb062792077fe74285f1b2634a2896b49a28b53ef77a69b1ec163" | jq -e '.changed == false'

Pinned hash 04dc928f1cad, from Oct 31, 2026, 00:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.offense-research/offense/changes.xml

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Source: MCP Registry · repository. Synced Oct 31, 2026, 01:17 UTC.