SigmaJunction

by sigmajunction.com · remote · no sign-in to list tools · v1.1.0 · published by com.sigmajunction

Software engineering firm in Serbia: services, engagement models, articles - and send an inquiry.

Final · 1Changes · 1

Compare Registry entry

7 tools: 1 do something that can't be undone, 1 change things and 5 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things1Claude Code: ask: see these tools
Only reads5Claude Code: allow: see these tools

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http site https://sigmajunction.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

send_inquirySend a project inquiry to SigmaJunction on the user's behalf.Reads text others writeCan send data outNo findings
Why it is in this group
- The name "send_inquiry" says "send": a word for sending, and what is sent cannot be taken back.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe name "send_inquiry" says "send": it sends or publishes something to other people.
Description, as the server wrote it
Send a project inquiry to SigmaJunction on the user's behalf. Only use when the user has asked to contact SigmaJunction, and confirm the name, email and message with them first. A partner replies by email within one business day.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true

Changes things 1Creates or changes something that can be changed back.Claude Code: ask

request_partner_checklistEmail the user SigmaJunction's two-page checklist for choosing a software development partner (PDF).Reads text others writeNo findings
Why it is in this group
- The name "request_partner_checklist" says "request": a word for a change.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Email the user SigmaJunction's two-page checklist for choosing a software development partner (PDF). Only use when the user asked for it and gave their email address. Newsletter sign-up only if the user explicitly wants it.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true

Only reads 5Looks things up and changes nothing.Claude Code: allow

get_company_profileWho SigmaJunction is: practices, engagement models, how engagements start, markets, languages and contact details.Reads private dataNo findings
Why it is in this group
- The name "get_company_profile" says "get": a word for reading.
What it can reach
- private-dataThe description's first sentence says "contact": it reads contacts.
Description, as the server wrote it
Who SigmaJunction is: practices, engagement models, how engagements start, markets, languages and contact details.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
get_engagement_modelsHow working with SigmaJunction is priced: dedicated team, per project with milestone billing, or an equity partnership; plus the cost guide and the free diagnosis.No findings
Why it is in this group
- The name "get_engagement_models" says "get": a word for reading.
Description, as the server wrote it
How working with SigmaJunction is priced: dedicated team, per project with milestone billing, or an equity partnership; plus the cost guide and the free diagnosis.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_articlesSigmaJunction's articles (title, summary, date, link), newest first, optionally filtered by a search term.No findings
Why it is in this group
- The name "list_articles" says "list": a word for reading.
Description, as the server wrote it
SigmaJunction's articles (title, summary, date, link), newest first, optionally filtered by a search term.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_servicesSigmaJunction's three practices and their capabilities, with links to each service page.No findings
Why it is in this group
- The name "list_services" says "list": a word for reading.
Description, as the server wrote it
SigmaJunction's three practices and their capabilities, with links to each service page.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
read_pageAny page of sigmajunction.com as Markdown, by path ("/pricing", "/de/work") or by full URL on sigmajunction.com.Reads text others writeNo findings
Why it is in this group
- The name "read_page" says "read": a word for reading.
What it can reach
- untrusted-inputThe description's first sentence says "url": it reads web pages, which anyone can write.
Description, as the server wrote it
Any page of sigmajunction.com as Markdown, by path ("/pricing", "/de/work") or by full URL on sigmajunction.com.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false

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.

3 paths in this server alone from private data, through text someone else wrote, to a way out. Denying 1 outbound tool breaks every one.

Reads private data1: Reads files, mail, messages, databases, secrets, calendars or repositories.; get_company_profile
Reads text others write3: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; read_page
request_partner_checklist
send_inquiry
Can send data out1: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; send_inquiry

deny to break every path

{
  "permissions": {
    "deny": [
      "mcp__site__send_inquiry"
    ]
  }
}

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Looked at Oct 22, 2026, 14:40 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 2
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: none
RFC 9728 protected resource metadata: none
Authorization servers: none
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

HighThe whole server
The endpoint served tools/list without credentials, and the list has 2 tools that change things (1 irreversible, 1 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://sigmajunction.com/mcp: tools/list returned 7 tools to an anonymous client, including send_inquiry (irreversible), request_partner_checklist (write)
What this check looks for

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http site https://sigmajunction.com/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": [
      "mcp__site__get_company_profile",
      "mcp__site__list_services",
      "mcp__site__get_engagement_models",
      "mcp__site__read_page",
      "mcp__site__list_articles"
    ],
    "ask": [
      "mcp__site__send_inquiry",
      "mcp__site__request_partner_checklist"
    ],
    "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 site. Review it before you use it.

Capability tags behind 4 rules

mcp__site__get_company_profile private-data
mcp__site__read_page untrusted-input
mcp__site__send_inquiry untrusted-input, outbound
mcp__site__request_partner_checklist untrusted-input

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.sigmajunction/site/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

2 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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Source: MCP Registry. Synced Oct 21, 2026, 18:04 UTC.

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