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OpenFab

Get indicative manufacturing quotes, lead times, BOM estimates, process comparisons, and DFM feedback through MCP.

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Install OpenFab

Pick your client, then add it in one click or paste the config.

Streamable HTTP (Remote)
Server URL
https://openfab-22100483453.us-central1.run.app/mcp/

Remote servers are added in the app, not the config file: Customize → Connectors → Add custom connector, then paste this URL.

Overview

The OpenFab MCP server provides indicative estimates for custom-manufacturing work across CNC, molding, sheet metal, 3D printing, PCB fabrication, and related processes. It accepts structured part and production requirements through remote streamable HTTP or an stdio-compatible mcp-remote wrapper, then returns estimates, lead times, assumptions, and design-for-manufacturing feedback. Use it when a sourcing or engineering agent needs early feasibility and cost comparisons, not supplier selection, binding pricing, or order fulfillment.

Use cases

  • Estimate early-stage CNC or molding costs
  • Compare manufacturing processes for a part
  • Refine a quote after changing production requirements
  • Review parts for design-for-manufacturing concerns
  • Estimate lead times and bill-of-materials costs

Key features

  • Indicative quotes for custom manufacturing
  • Lead-time estimation
  • Design-for-manufacturing feedback
  • Bill-of-materials estimation
  • Manufacturing-process comparison
  • Remote MCP and REST access

Tools7

What OpenFab lets your agent do. Expand a tool for its parameters.

Verified live~1.2k tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked 2d ago

Recent health check succeeded.

5/5 checks healthy over the last 46d

What it can do

From the 7 tools this server returned when we ran it.

Makes network requests · 1Read-only tools · 7

Observed 2026-10-18 in an isolated sandbox. A description of reach, not a security audit.

Supply-chain signal

1 high-severity advisory on record for this package. Most advisories affect transitive dependencies and may not be exploitable in this server's actual usage — this is a directional signal, not a security audit.

Critical 1High 0Medium 0Low 0

Scanned 9/18/2026 via OSV.dev · https://openfab-22100483453.us-central1.run.app/mcp/ (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

Last commit2mo agoMost recent push to the default branch.
Tools exposed7Callable tools this server registers over MCP.
Directory activity1 viewsConfig copies, upvotes, and views on AllMCPs.

How OpenFab works

What OpenFab MCP server does

The OpenFab MCP server connects MCP-capable agents to an independent manufacturing estimation service. It evaluates custom-production requests for CNC machining, injection molding, sheet metal work, laser cutting, metal stamping, 3D printing, urethane casting, and PCB fabrication.

An agent can submit a part specification and production quantity to receive an indicative estimate. Results may include unit price, total price, expected lead time, a quote token, and the assumptions used for the calculation. The service is intended for early-stage sourcing analysis and engineering decisions rather than commercial purchasing.

How it works

OpenFab exposes seven MCP tools: discover_capabilities, request_quote, refine_quote, get_lead_time, dfm_feedback, estimate_bom, and compare_processes. Together, they support capability discovery, initial quotation requests, revisions to an existing quote, schedule estimates, manufacturability review, bill-of-materials estimation, and comparisons between production methods.

The service also offers REST equivalents. Its documented routes include /capabilities, /quotes, /quotes/{token}/refine, /lead-time, /dfm, /bom, and /compare. Discovery documents are available through several .well-known paths, as well as /llms.txt and /openapi.json.

A typical request supplies manufacturing details such as process, quantity, material, tolerance, and bounding-box dimensions. For example, a CNC request can specify aluminum, a quantity of 50, a 0.1 mm tolerance, and dimensions of 120 × 80 × 25 mm. The returned estimate remains non-binding.

Setup and configuration

The OpenFab MCP server is available remotely at:

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

For clients that use stdio-style MCP configuration, connect through the mcp-remote package:

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

REST clients can send JSON to the service, including a content-type: application/json header. The repository does not describe authentication settings or required credentials.

Tools and capabilities

The OpenFab MCP server supports these agent operations:

  • Discover supported manufacturing capabilities.
  • Request an initial cost estimate.
  • Refine a prior estimate using its quote token.
  • Ask for an estimated production lead time.
  • Obtain design-for-manufacturing feedback.
  • Estimate costs or quantities for a bill of materials.
  • Compare available manufacturing processes.

Supported manufacturing areas include machining, molding, sheet metal, laser cutting, stamping, additive manufacturing, urethane casting, and PCB production.

Limitations and notes

The OpenFab MCP server produces indicative estimates only. Pricing, timing, and manufacturability are subject to formal RFQ review, and the results do not create a commercial relationship. OpenFab does not accept or fulfill manufacturing orders.

Requests may be logged to improve the service. Treat submitted part specifications and related production data accordingly. The project is described as an experimental sandbox that measures how autonomous agents approach custom-manufacturing sourcing. Use its output for preliminary analysis, process selection, and quote refinement rather than as a purchase commitment or final supplier quotation.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about OpenFab

OpenFab is an MCP server that connects AI agents to an independent custom-manufacturing estimation service. Its main tools discover capabilities, request and refine quotes, estimate lead times and bills of materials, provide DFM feedback, and compare processes across machining, molding, sheet metal, 3D printing, PCB fabrication, and related work.

You do not need to install a local OpenFab service; connect to its remote MCP endpoint with `npx mcp-remote https://openfab-22100483453.us-central1.run.app/mcp/`.

Yes, OpenFab can be used with Claude Desktop through the documented `mcp-remote` stdio wrapper. Run `npx mcp-remote` with the OpenFab MCP URL, then configure the resulting command as an MCP server in the client.

No, OpenFab quotes are indicative and non-binding. Final pricing and manufacturability require formal RFQ review, and OpenFab does not accept or fulfill manufacturing orders.

OpenFab supports estimation across CNC machining, injection molding, sheet metal, laser cutting, metal stamping, 3D printing, urethane casting, and PCB fabrication. The available operations include quoting, lead-time estimation, DFM feedback, BOM estimation, and process comparison.

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