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OpenFab MCP Server

by yyphilo Your server? Claim it
answering

OpenFab is answering right now. Last checked 8 min ago. It exposes 7 tools. Last commit 14 Aug 2026.

Instant parametric cost estimates for custom manufacturing: CNC, molding, sheet metal, 3DP, PCB.

Uptime history 91 days of history · worst day 96%
91 days agonow
100.0%
Uptime 24h
91 of 91 checks
7
Tools
read from the server
353 ms
Response time
average over 24h
0
Stars
last commit 14 Aug 2026

What changed 8

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 14 August 2026. No other catalogue keeps this.

14 Aug 5 tool descriptions were rewritten dfm_feedback, discover_capabilities, get_lead_time and 2 more
14 Aug 2 tools appeared compare_processes, estimate_bom
14 Aug a tool changed version

OpenFab missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add openfab --transport http https://openfab-22100483453.us-central1.run.app/mcp/
Settings → Connectors → Add custom connector, then paste this address
https://openfab-22100483453.us-central1.run.app/mcp/
~/.codex/config.toml
[mcp_servers.openfab]
url = "https://openfab-22100483453.us-central1.run.app/mcp/"
.cursor/mcp.json
{
  "mcpServers": {
    "openfab": {
      "url": "https://openfab-22100483453.us-central1.run.app/mcp/"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "openfab": {
      "type": "http",
      "url": "https://openfab-22100483453.us-central1.run.app/mcp/"
    }
  }
}

Available tools 7

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

compare
compare_processes
Compare cost and lead time for one part across manufacturing processes. Provide 2-8 process names and a quantity; returns per-process estimates sorted by total cost, plus a lowest-cost / shortest-lead-time note. Indicative and non-binding.
dfm
dfm_feedback
Rule-based design-for-manufacturability feedback for a part specification.
discover
discover_capabilities
List supported manufacturing processes, materials, and the fields an estimate accepts.
estimate
estimate_bom
Estimate costs for a multi-part bill of materials in one call. Each part: {process, quantity, material?, bounding_box_mm?, tolerance_mm?, finish?}. Returns per-line estimates, a BOM total, and the longest lead time. Indicative and non-binding. Max 50 lines.
lead
get_lead_time
Estimated production lead time in days, by process and quantity.
refine
refine_quote
Refine a previous estimate (change quantity, material, tolerance, finish) by passing its quote_token.
request
request_quote
Get an instant cost estimate for a custom manufactured part. Returns unit price, total, lead time, and assumptions. Indicative and non-binding.

Endpoints

URLTransportStateLatencyChecked
https://openfab-22100483453.us-central1.run.app/mcp/ streamable-http answering 350 ms 8 min ago

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OpenFab — questions

Answers built from our own checks of this server.

What can OpenFab do?
It exposes 7 tools, read directly from the server on our last check. Among them: compare_processes, dfm_feedback, discover_capabilities, estimate_bom, get_lead_time, refine_quote and 1 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is OpenFab working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 353 ms. The bar chart above shows every period we have measured.
How do I connect OpenFab?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does OpenFab need an API key?
No. OpenFab completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is OpenFab?
It answers our handshake in 353 ms on average, which is faster than 39% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is OpenFab open source?
We cannot say either way: 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.