whobuildsit — space & defence hardware suppliers

by whobuildsit.com · remote · no sign-in to list tools · v1.0.0 · published by com.whobuildsit

Find space and defence hardware suppliers and parts by specification, process and certification.

Final · 1

Compare Registry entry

7 tools: 1 do something that can't be undone and 6 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things0Claude Code: ask
Only reads6Claude 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 catalog https://whobuildsit.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

request_quoteSend a quote request to whobuildsit, which reviews it and passes it to suppliers who can make the part.Reads text others writeNo findings
Why it is in this group
- The name "request_quote" says "request": a word for a change.
- The description's first verb is "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.
Description, as the server wrote it
Send a quote request to whobuildsit, which reviews it and passes it to suppliers who can make the part. Before calling, ASK THE USER for their work email and explicit consent to share the request and email with suppliers — never invent an email. Give a part_id or supplier_slug from earlier results when you have one. Suppliers reply to the user directly; nothing is sent automatically.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true

Only reads 6Looks things up and changes nothing.Claude Code: allow

explain_standardWhat a standard (AS9100D, NADCAP, ECSS, ISO 9001, MIL-STD …) certifies, why a buyer cares, what it is typically required for, and which suppliers in the index claim it.No findings
Why it is in this group
- The name "explain_standard" says "explain": a word for reading.
Description, as the server wrote it
What a standard (AS9100D, NADCAP, ECSS, ISO 9001, MIL-STD …) certifies, why a buyer cares, what it is typically required for, and which suppliers in the index claim it.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
get_partAll specifications for one part, whether the manufacturer confirmed them, and the supplier.No findings
Why it is in this group
- The name "get_part" says "get": a word for reading.
Description, as the server wrote it
All specifications for one part, whether the manufacturer confirmed them, and the supplier.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
get_supplierFull profile: what they make, capabilities (process, tolerance, envelope, material, lead time), certifications claimed, categories and products.No findings
Why it is in this group
- The name "get_supplier" says "get": a word for reading.
Description, as the server wrote it
Full profile: what they make, capabilities (process, tolerance, envelope, material, lead time), certifications claimed, categories and products. Contact details are not returned — use the profile URL.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
list_categoriesThe part tree (segment → assembly → component) with supplier counts.No findings
Why it is in this group
- The name "list_categories" says "list": a word for reading.
Description, as the server wrote it
The part tree (segment → assembly → component) with supplier counts. Use to see what the index covers and where it has gaps.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
search_partsFind parts by keyword and/or numeric specification.No findings
Why it is in this group
- The name "search_parts" says "search": a word for reading.
Description, as the server wrote it
Find parts by keyword and/or numeric specification. Units are understood: "3000 psi" also matches parts rated in bar; "Ø40 mm", "1250 °C", "10 GHz" work. Returns matching parts with supplier, key specs and a URL.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false
search_suppliersFind companies that can make something — by process (e.g.No findings
Why it is in this group
- The name "search_suppliers" says "search": a word for reading.
Description, as the server wrote it
Find companies that can make something — by process (e.g. "5-axis machining", "vacuum brazing"), material, certification (e.g. "AS9100D"), category, or country. Most space hardware is made to drawing by contract manufacturers that have no product catalogue; this is how to find them.
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.

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.; request_quote
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.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http catalog https://whobuildsit.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__catalog__search_parts",
      "mcp__catalog__search_suppliers",
      "mcp__catalog__get_supplier",
      "mcp__catalog__get_part",
      "mcp__catalog__explain_standard",
      "mcp__catalog__list_categories"
    ],
    "ask": [
      "mcp__catalog__request_quote"
    ],
    "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 catalog. Review it before you use it.

Capability tags behind 1 rule

mcp__catalog__request_quote 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.whobuildsit/catalog/changes.xml

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

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.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 18:11 UTC.

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