# whobuildsit — space & defence hardware suppliers (remote · whobuildsit.com)

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

- Trust score: 68/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `whobuildsit.com`: 68/100 (this document), [markdown](https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit.md), [page](https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit)

## Channel facts

- Endpoint: `https://whobuildsit.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 857 tokens (~122/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 86/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 59% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 8 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the whobuildsit — space & defence hardware suppliers MCP server?

whobuildsit — space & defence hardware suppliers is a hosted endpoint at https://whobuildsit.com/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.

### Claude

```bash
claude mcp add --transport http com-whobuildsit-catalog 'https://whobuildsit.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-whobuildsit-catalog": {
      "url": "https://whobuildsit.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-whobuildsit-catalog": {
      "type": "http",
      "url": "https://whobuildsit.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-whobuildsit-catalog]
url = "https://whobuildsit.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-whobuildsit-catalog": {
      "type": "remote",
      "url": "https://whobuildsit.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-whobuildsit-catalog --url 'https://whobuildsit.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-whobuildsit-catalog:
    url: "https://whobuildsit.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-whobuildsit-catalog": {
      "Transport": "http",
      "Url": "https://whobuildsit.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-whobuildsit-catalog -t streamable-http -u 'https://whobuildsit.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-whobuildsit-catalog": {
      "type": "http",
      "url": "https://whobuildsit.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-17 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-14 (score 67, +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.

### 2026-10-12 (score 66, +1)

- [functional improvement] Stability: unverified → 0.07

### 2026-10-10 (score 65)

First indexed and scored.

## MCP tools (7)

### `search_parts` (~114 tokens)

Search parts by name or specification

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.

Input parameters:

- `confirmed_only` (boolean): Only parts whose data the manufacturer confirmed
- `limit` (integer)
- `query` (string, required): e.g. "3000 psi needle valve", "space heat pipe", "vacuum furnace 1250 C"

### `search_suppliers` (~143 tokens)

Search suppliers by capability

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.

Input parameters:

- `certification` (string): e.g. "AS9100D", "NADCAP", "ISO 9001"
- `country` (string): e.g. "India", "United Kingdom", "USA"
- `limit` (integer)
- `query` (string): Free text over name, description, capabilities and categories

### `get_supplier` (~59 tokens)

Get a supplier profile

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.

Input parameters:

- `slug` (string, required): Supplier slug from a search result

### `get_part` (~37 tokens)

Get a part with all specifications

All specifications for one part, whether the manufacturer confirmed them, and the supplier.

Input parameters:

- `id` (integer, required): Part id from a search result

### `explain_standard` (~64 tokens)

Explain a certification or standard

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.

Input parameters:

- `standard` (string, required)

### `request_quote` (~243 tokens)

Request a quote from matching suppliers

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.

Input parameters:

- `buyer_company` (string)
- `buyer_country` (string)
- `buyer_email` (string, required): The user's work email, as they gave it
- `buyer_name` (string)
- `consent` (boolean, required): true only if the user explicitly agreed to share this request and their email with suppliers
- `export_controlled` (string): ITAR/EAR or similar
- `nda` (boolean): true if the user will only share drawings after suppliers sign an NDA
- `needed_by` (string): Date or lead time
- `part_id` (integer)
- `quantity` (string)
- `requirement` (string, required): What is needed: part, specification, material, tolerance, certification, drawings available
- `supplier_slug` (string)

### `list_categories` (~35 tokens)

List part categories

The part tree (segment → assembly → component) with supplier counts. Use to see what the index covers and where it has gaps.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit#diagnostics

## Score history

- 2026-10-18: 68
- 2026-10-17: 68
- 2026-10-16: 67
- 2026-10-15: 67
- 2026-10-14: 67
- 2026-10-13: 66
- 2026-10-12: 66
- 2026-10-10: 65

## Common questions

### What is the whobuildsit — space & defence hardware suppliers MCP server?

whobuildsit — space & defence hardware suppliers is an MCP server listed in the public MCP registry as com.whobuildsit/catalog. Find space and defence hardware suppliers and parts by specification, process and certification. This page covers its hosted endpoint (https://whobuildsit.com/mcp).

### Is the whobuildsit — space & defence hardware suppliers MCP server safe to use?

whobuildsit — space & defence hardware suppliers scores 68 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 whobuildsit — space & defence hardware suppliers MCP server expose?

whobuildsit — space & defence hardware suppliers exposes 7 tools: search_parts, search_suppliers, get_supplier, get_part, explain_standard, and 2 more. Their descriptions and schemas cost roughly 695 tokens of context every time the server is loaded.

### Does the whobuildsit — space & defence hardware suppliers MCP server require authentication?

No. We connected to whobuildsit — space & defence hardware suppliers without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the whobuildsit — space & defence hardware suppliers MCP server still maintained?

whobuildsit — space & defence hardware suppliers is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://whobuildsit.com/mcp
- Website: https://whobuildsit.com/ai
- Changelog RSS feed: https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit.json
- HTML version of this page: https://verifymcp.io/servers/com-whobuildsit-catalog/whobuildsit