# ply 3D Printing

> Custom 3D-printed parts: describe a part, upload a 3D file or pick a model, see a live price, order.

- name: com.plyparts/ply
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 83/100 flags: no-repository
- quality: 76/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.plyparts%2Fply
- tools: https://api.protogrid.dev/v1/servers/com.plyparts%2Fply/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "ply": {
      "type": "http",
      "url": "https://www.plyparts.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% +updated-12d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 76/100 (good)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 93 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 9 of 9 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- warn `tools.token_cost`: about 10,370 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 25 (weight 15)

- warn `stability.changes`: 12 tool changes in 30 days
- fail `stability.rug_pull`: 2 tools kept their name but changed most of their description in 30 days; review before trusting them

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 9, about 10,370 tokens to load them all
- tool set hash: 31221eabd373616fa1f0aa71fa807d9c
- tools last changed: 2026-11-05T17:29:51.129Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.plyparts/ply.svg)](https://protogrid.dev/servers/com.plyparts/ply)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-11-05 `order_cart` changed (inputSchema)
- 2026-11-05 `price_cart` changed (inputSchema)
- 2026-11-05 `order_part` changed (inputSchema)
- 2026-11-05 `recommend_material` changed (inputSchema)
- 2026-11-05 `make_part` changed (inputSchema)
- 2026-11-05 `order_cart` added
  - Put every part from price_cart into one ply cart and get the link to finish the order on plyparts.com (shipping, payment, engineer review). Pass the same parts list. Nothing is charged here.
- 2026-11-05 `price_cart` added
  - Price a cart of several different parts at once (built parts from sizes and/or the customer's files, each with its own options and quantity). ply's card shows them in a grid with each part's picture, quantity, price and the total, and an Order button for all of them. Call again with the whole updated list after any change.
- 2026-11-05 `order_part` changed (inputSchema)
- 2026-11-05 `recommend_material` changed (inputSchema)
- 2026-11-05 `make_part` changed (inputSchema)

Full history: https://api.protogrid.dev/v1/servers/com.plyparts%2Fply/changes

## Remotes

- https://www.plyparts.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (9)

- `find_models`: Search Printables for ready-made 3D models. Returns titles, designers and page links; the customer downloads their pick and drops it into ply's card.
- `list_materials`: The materials, colors and strength levels ply prints custom parts in, with what each material is good for.
- `make_part`: Build, check and price a custom 3D-printed part from exact sizes (mm): plate with holes, L-bracket, spacer/standoff, washer, or box with lid. Shows the part in 3D with its price and an Order button. Sizes left out use sensible defaults. Use again with new sizes or options when the customer asks for changes.
- `order_cart`: Put every part from price_cart into one ply cart and get the link to finish the order on plyparts.com (shipping, payment, engineer review). Pass the same parts list. Nothing is charged here.
- `order_part`: Put a part into a ply cart and get the link to finish the order on plyparts.com (shipping, payment, engineer review). Nothing is charged here. For a built part pass the same template, sizes and options; for a file pass its path and options.
- `price_cart`: Price a cart of several different parts at once (built parts from sizes and/or the customer's files, each with its own options and quantity). ply's card shows them in a grid with each part's picture, quantity, price and the total, and an Order button for all of them. Call again with the whole updated list after any change.
- `price_file`: Price the customer's 3D file (STL, 3MF, STEP or OBJ) and show it in ply's card. Without a file, shows the card with an upload button (with sourceUrl: the model page to download it from). In ChatGPT, pass a file the customer attached. Pass `path` (from an earlier result) to change options for a file already priced.
- `price_model_link`: Show a 3D model's page in ply's card with an upload box: the customer opens the link, downloads the file (STL, 3MF, STEP or OBJ) and drops it in for an instant price. ply doesn't download models from any site itself.
- `recommend_material`: Run ply's material advisor ("Help me choose" on plyparts.com) for a part: it may ask up to 2 questions about how the part is used, then recommends a process, material, color and strength. Give either the part's ply `path` (a file) or its template and sizes (a built part).