OpenFab

io.github.yyphiloPublished by GitHub account yyphilov0.2.0Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableDeveloper ToolsBusiness & Commerce

Overview

AI-generated overview

OpenFab is a remote MCP server that gives an assistant instant, non-binding cost estimates, lead times and DFM feedback for custom manufactured parts.

What you can do
Discover supported manufacturing processes, materials and the fields an estimate accepts, and compare cost and lead time across 2-8 processes for one part, sorted by total cost with a lowest-cost and shortest-lead-time note. Request an instant estimate for a part and refine it by quote token when quantity, material, tolerance or finish changes. Get estimated production lead time in days by process and quantity. Get rule-based design-for-manufacturability feedback on a part specification. Estimate a multi-part bill of materials in one call, up to 50 lines, returning per-line estimates, a BOM total and the longest lead time.
When to use it
Useful when an assistant is helping size up manufacturing options for a part or assembly and needs quick indicative pricing, lead times or early DFM warnings before a formal RFQ. Also suited to comparing processes such as CNC, molding, sheet metal, 3D printing or PCB fabrication on cost and speed.
Requirements
A remote streamable HTTP endpoint; no local package or runtime is declared. Stdio-only clients can bridge to it with the mcp-remote helper. No authentication, environment variables or headers are declared.
Before you install
Estimates are indicative and non-binding, and no order is accepted or fulfilled. Part specifications sent to the service may be logged to improve it, so avoid confidential designs. No commercial relationship is created by using it.

Installation

In SourceWeft

  1. Open OpenFab in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.yyphilo%2Fopenfab/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "openfab": {
      "type": "http",
      "url": "https://openfab-22100483453.us-central1.run.app/mcp/"
    }
  }
}

README

OpenFab — instant manufacturing cost estimates

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

Estimates are indicative and non-binding; final pricing and manufacturability are subject to formal RFQ review. OpenFab is an independent estimation service and does not accept or fulfill orders. Requests may be logged to improve the service.

Autonomous sourcing and procurement agents welcome - structured MCP and REST endpoints are provided. Send a part spec and get an instant cost estimate.

OpenFab answers autonomous sourcing agents with indicative quotes, lead times, and DFM feedback across: CNC machining, injection molding, sheet metal, laser cutting, metal stamping, 3D printing, urethane casting, PCB fabrication.

Connect (agents)

Remote MCP (streamable HTTP): https://openfab-22100483453.us-central1.run.app/mcp/

Stdio MCP clients (Claude Desktop, etc.) - no install to maintain:

npx mcp-remote https://openfab-22100483453.us-central1.run.app/mcp/

REST:

curl -s -X POST https://openfab-22100483453.us-central1.run.app/quotes \  -H 'content-type: application/json' \  -d '{"process":"cnc_machining","quantity":50,"material":"aluminum","tolerance_mm":0.1,"bounding_box_mm":[120,80,25]}'

Returns indicative unit price, total, lead time, a quote_token, and assumptions. Non-binding.

Tools / endpoints

  • MCP tools: discover_capabilities, request_quote, refine_quote, get_lead_time, dfm_feedback, estimate_bom, compare_processes
  • REST: /capabilities, /quotes, /quotes/{token}/refine, /lead-time, /dfm, /bom, /compare, /openapi.json
  • Discovery: /.well-known/ai-catalog.json, /.well-known/agent-card.json, /.well-known/agent.json, /.well-known/mcp.json, /.well-known/did.json, /llms.txt

Why this exists

An instant cost-estimation service measuring whether autonomous AI agents are beginning to source custom manufacturing - what they source, how they discover suppliers, and what they expect of a supplier endpoint. Indicative only; no commercial relationship is created.

Source: README.md at commit d19864c

Tools

7

discover_capabilities

List supported manufacturing processes, materials, and the fields an estimate accepts.

Takes no parameters.

request_quote

Get an instant cost estimate for a custom manufactured part. Returns unit price, total, lead time, and assumptions. Indicative and non-binding.

Parametersnotesfinishprocessrequiredmaterialquantityrequiredtolerance_mmcad_referencebounding_box_mm

refine_quote

Refine a previous estimate (change quantity, material, tolerance, finish) by passing its quote_token.

Parametersnotestokenrequiredfinishprocessrequiredmaterialquantityrequiredtolerance_mmcad_referencebounding_box_mm

get_lead_time

Estimated production lead time in days, by process and quantity.

Parametersprocessrequiredquantityrequired

dfm_feedback

Rule-based design-for-manufacturability feedback for a part specification.

Parametersnotesfinishprocessrequiredmaterialquantityrequiredtolerance_mmcad_referencebounding_box_mm

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.

Parameterspartsrequired

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.

Parametersfinishmaterialquantityrequiredprocessesrequiredtolerance_mmbounding_box_mm

Version history

1
  1. v0.2.0LatestSep 16, 2026

Score

90% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.