Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
What fits, with live prices: specs, fit verdicts with rule ids and stock for home espresso.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
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Works in Claude on the web, desktop and mobile:
https://compatsy.com/home-espresso/mcpRun this in your terminal
claude mcp add --transport http home-espresso https://compatsy.com/home-espresso/mcpPaste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"home-espresso": {
"url": "https://compatsy.com/home-espresso/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Paste into .vscode/mcp.json in your project
{
"servers": {
"home-espresso": {
"type": "http",
"url": "https://compatsy.com/home-espresso/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
https://compatsy.com/home-espresso/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.
search_productsFind products by name or by category and spec filters; returns key specs and the best in-stock offer. Example: {"query":"puck screen","category":"puck_screen","limit":5}
get_productFull specs with per-field confidence and source, every offer with verified time, 30/90-day price range, and the top fits per category with counts. Example: {"product_id":"breville-barista-express"}
compareSide-by-side spec table with offers and the fields that differ. Pass 2-10 product_ids, or a category with filters. Example: {"product_ids":["breville-barista-express","breville-barista-pro"]}
check_fitDoes this part fit that machine? Returns a verdict with the rule id and version that decided it, or the missing fields. Example: {"subject_id":"lucca-puck-screen-58mm","target_id":"breville-barista-express"}
check_stockAvailability and price per merchant, re-verified live when the data is over an hour old. Example: {"product_id":"lucca-puck-screen-58mm","merchant_id":"www-seattlecoffeegear-com"}
report_issueFlag a wrong spec, price or fit verdict. Reports never edit facts; two independent reports mark a fact disputed. Example: {"entity_type":"product","entity_id":"breville-barista-express","field":"portafilter_mm","claim":"Breville lists a 54 mm portafilter for the Barista Express"}
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
The registry name was verified against the domain compatsy.com (the registry checks domain ownership)
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
Responded in 453 ms (HTTP 200)
No sign-in needed
Read 6 tool descriptions and found no hidden instructions to the AI
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
The registry does not list a required key, though some servers ask you to sign in on first use.
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 8 days ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
In the same category: Spec Driven Development, Remote Desktop Commander, Draugr
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
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Security scanning for AI agents: SAST, SCA, secrets, IaC, DAST, ranked by real risk.
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
compatsy answers "does this part fit that machine, and where is it in stock?" Each category has its own MCP endpoint:
| Category | Covers | Endpoint |
|---|---|---|
| 3D printing | printers, nozzles, hotends, build plates, filament, enclosures | https://compatsy.com/3d-printing/mcp |
| Home espresso | machines, tampers, puck screens, distribution tools, dosing funnels, baskets | https://compatsy.com/home-espresso/mcp |
Specs carry their source and confidence, fit verdicts cite the rule that decided them, and prices come with the time they were last verified.
This repo is the quickstart for the hosted MCP server. Nothing runs locally except an optional stdio bridge.
Remote (preferred). Any client that supports Streamable HTTP:
{ "mcpServers": { "compatsy-3d-printing": { "url": "https://compatsy.com/3d-printing/mcp" } } }
stdio via npx. For clients that only launch local servers:
{ "mcpServers": { "compatsy-espresso": { "command": "npx", "args": ["-y", "github:elliot-rosen/compatsy-mcp"], "env": { "COMPATSY_MCP_URL": "https://compatsy.com/home-espresso/mcp" } } } }
Claude Code: claude mcp add --transport http compatsy-3d-printing https://compatsy.com/3d-printing/mcp
No account or key. Calls are rate limited per session. The bridge defaults to https://compatsy.com/mcp (3D printing); set COMPATSY_MCP_URL to another endpoint from the table.
| Tool | What it does | Read-only |
|---|---|---|
search_products | Find products by name or category plus spec filters | yes |
get_product | Full specs with source and confidence, every offer with verified time | yes |
compare | Side-by-side spec table for 2 to 10 products | yes |
check_fit | Verdict for a part and a machine, with the rule id and version, or the missing fields | yes |
check_stock | Price and availability per merchant, re-verified when over an hour old | yes |
report_issue | Flag a wrong spec, price or verdict. Reports never edit facts | no |
{"name": "search_products", "arguments": {"query": "hardened nozzle 0.4", "category": "nozzle", "limit": 5}}
{"name": "get_product", "arguments": {"product_id": "prusa-mk4s"}} {"name": "compare", "arguments": {"product_ids": ["bambu-lab-p1s", "prusa-core-one"]}} {"name": "check_fit", "arguments": {"subject_id": " ", "target_id": "prusa-mk4s"}} {"name": "check_stock", "arguments": {"product_id": "prusa-mk4s"}} {"name": "report_issue", "arguments": {"entity_type": "product", "entity_id": "prusa-mk4s", "field": "nozzle_thread", "claim": "MK4S uses the Nextruder thread"}}
Example prompts that use them well:
fits, fits_with_adapter, does_not_fit or unknown. Unknown is an answer: it lists the spec fields that are missing rather than guessing. Every rule needs two independent sources, one from the manufacturer, before it can decide anything.
rules/cursor.mdc and rules/windsurf.md tell Cursor or Windsurf agents when to call compatsy instead of guessing fitment from memory.