Carbon vs OpenFab
A side-by-side look at the Carbon and OpenFab MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
C
CarbonIndustrial & IoTOpen-source manufacturing ERP, MES and QMS. Quoting, MRP, inventory, shop floor, quality and lot/serial traceability on one Postgres schema, with a REST API and MCP server. Self-host or use Carbon Cloud.51GoodAuth: not declaredVerdict: choose Carbon for industrial & iot work; choose OpenFab for industrial & iot over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
CChoose Carbon when
- You need dedicated capabilities in the Industrial & IoT domain.
- You have the keys it needs:
CARBON_API_KEY.
Choose OpenFab when
- You need dedicated capabilities in the Industrial & IoT domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
discover_capabilities, request_quote, refine_quote.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | C Carbon | |
|---|---|---|
| Category | Industrial & IoT | Industrial & IoT |
| Quality signal | 51/100 · Good | 45/100 · Fair |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Remote HTTP/SSE |
| Auth | Not declared | Not declared |
| Pricing | Free | Not declared |
| Required env vars | CARBON_API_KEY | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 2,737 | 0 |
| Directory activity | 0 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | Not listed | 7 |
| Full listing | View Carbon | View OpenFab |
Tools & capabilities
Carbon tools
No tool names declared yet. Check the project README from the listing page.
OpenFab tools 7
discover_capabilitiesrequest_quoterefine_quoteget_lead_timedfm_feedbackestimate_bomcompare_processes
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Carbon
No confirmed install command for Carbon yet — follow the setup steps linked from its listing page rather than a guessed package name.
OpenFab
{
"mcpServers": {
"openfab": {
"url": "https://openfab-22100483453.us-central1.run.app/mcp/"
}
}
}
Frequently asked questions
Carbon is categorized under Industrial & IoT and uses an install path we have not confirmed yet. OpenFab belongs to Industrial & IoT and uses a remote HTTP/SSE transport. Pick Carbon for industrial & iot work and OpenFab for industrial & iot.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Carbon has no confirmed install command yet — follow its own setup instructions.
Carbon is listed as free. OpenFab has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add carbon-2 and openfab as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Carbon has a quality signal of 51/100 (Good) with 0 views, 0 installs and 2,737 GitHub stars. OpenFab has 45/100 (Fair) with 0 views, 0 installs and 0 GitHub stars.