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FabTally MCP server

Which MCP servers are FabTally's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-24

← Back to FabTally

Whose server it is
  • Registry namecom.fabtally/slicerverified in the MCP registry

The registry name sits under fabtally.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-24
  • Stateanswerschecked 2026-10-24
  • Tools14
  • Server calls itselffabtally
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-24 the server answered initialize and tools/list without a sign-in. First answer in 154 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Quote print time, filament use and cost from an STL; Check whether a model fits a printer's bed.
  • Checked on 4 of the 7 days it takes to judge reliability.

Once connected

  • For "Quote print time, filament use and cost from an STL", the likely first call is get_print_quote.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 4, the first on 2026-10-24
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring4 of the 7 daily checks it takes to print a share
  • Median first answer468 ms
  • Space in an agent's context≈ 10,533 tokensthe definitions of all its tools (14), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 14 toolsdeclared outputSchema: results come typed, read once
  • Not saying whether it only reads or can destroy: 14 of 14

What an agent can do with it

  • can do · Quote print time, filament use and cost from an STL
  • can do · Check whether a model fits a printer's bed
  • not sure · Generate g-code for a print job

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers14 tools · read 2026-10-24
  • list_printers

    FREE. Discovery: the live FDM printer fleet (id, name, bed/build volume mm, nozzle), the 12 filament materials (PLA, PETG, ABS, ASA, Nylon, PC, TPU + carbon-fiber variants), and the pricing model. Call this FIRST to pick a `printer` and…

  • check_printability

    FREE 3D-printing DFM / printability check for an STL/3MF/OBJ/PLY model. Paste a link: a GitHub blob, Google Drive or Dropbox share link, a direct .stl/.3mf/.obj/.ply/.step URL, or a .zip (first printable model inside is used)…

  • optimize_orientation

    FREE (personal/interactive; fair-use limited — counts as ~4 slices). Orientation optimiser: really slices up to 4 candidate build orientations with automatic supports and recommends the one using the LEAST support material (exact…

  • analyze_model

    FREE geometry sanity check for an STL/3MF/OBJ/PLY model: bounding box (mm), volume (cm3), triangle count, watertight/manifold flag, fits-on-bed, plus a printable-so-far verdict and overhang/thin-wall heuristics. Paste a link: a GitHub…

  • get_print_quote

    FREE. Slicer-accurate FDM price quote from a real slice (not an estimate): print time, filament grams, and a priced quote (material + machine time + setup, with automatic volume discounts). Paste a link: a GitHub blob, Google Drive or…

  • slice_model

    Slice on any of the 12 FDM printers. The METRICS — print time, filament grams, layer count, geometry, fits-on-bed and a priced quote — are FREE for personal/interactive use (fair-use limits). Paste a link: a GitHub blob, Google Drive or…

  • compare_printers

    FREE. Slice the same model across several printers and get a table of print time / filament / cost / fits-on-bed, plus the cheapest and fastest picks. Paste a link: a GitHub blob, Google Drive or Dropbox share link, a direct…

  • recommend_material

    FREE. Suggest the best filament(s) for a use case with plain-language reasons, and (by default) a real slice/quote per candidate so you see the time/filament/cost tradeoff. use_case: functional | decorative | outdoor | flexible |…

  • recommend_settings

    FREE. Suggest layer height / infill / walls for a goal (strength | speed | surface | cost) and slice WITH those settings so you see the resulting time / filament / cost. Paste a link: a GitHub blob, Google Drive or Dropbox share link, a…

  • whatif_infill

    FREE. A quick table of print time / filament / cost across several infill %s, so you can trade strength for material/time. Paste a link: a GitHub blob, Google Drive or Dropbox share link, a direct .stl/.3mf/.obj/.ply/.step URL, or a .zip…

  • scale_advisor

    FREE. Report the new dimensions / time / filament / cost after scaling a model. target: 'fit-bed' (largest uniform scale that fits the printer), 'percent:<n>' (e.g. percent:150), or 'dim:<axis>:<mm>' (e.g. dim:z:80). Paste a link: a…

  • validate_model

    FREE, fast, uncapped. One-shot 'is this printable?': watertight/manifold, wall-thickness estimate, size vs the chosen bed, and a printability verdict with reasons + a one-liner. Geometry-only (no slice). Paste a link: a GitHub blob…

  • cost_breakdown

    FREE. Break a quote into material vs machine-time vs setup vs margin, in your currency and filament price (bring your own pricing). Paste a link: a GitHub blob, Google Drive or Dropbox share link, a direct .stl/.3mf/.obj/.ply/.step URL…

  • analyze_3d_model

    FREE general 3D-model analysis — bounding box, volume, triangle count, watertight/manifold, solidity — useful BEYOND 3D printing: game-asset & real-time mesh QC, AR/VR asset optimisation, 3D-marketplace upload validation, engineering…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "slicer": {
      "type": "http",
      "url": "https://fabtally.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http fabtally https://fabtally.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://fabtally.com/mcp as a custom connector in the settings.

OpenAPI spec

14 paths, read 2026-10-24. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.