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Materials

by simulsarker007version 0.1.0i★ –iRuns in the cloud
Registry namecom.spacemushroom/materials

Install

Overview

Description from the maker (original English)

Read-only sourced engineering materials data: every value with unit, conditions and source.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Install

Pick the AI app you use, then copy the settings.

Before you install

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://spacemushroom.com/mcp

Run this in your terminal

claude mcp add --transport http materials https://spacemushroom.com/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "materials": {
      "url": "https://spacemushroom.com/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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "materials": {
      "type": "http",
      "url": "https://spacemushroom.com/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:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://spacemushroom.com/mcp

Menu 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.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

  • search_materials

    Find materials by name, abbreviation or formula. Optionally filter by category slug (for example polymers, metals, energy). Returns ids to use with get_material.

  • get_material

    The sourced record of one material: sourced numbers with conditions, method and source location, plus uses, hazards, failure modes, corrosion and supply facts. Optionally narrow to one property or fact topic.

  • compare

    Line several materials up on one property, with each value, its conditions and its source. Values are also given in the property's canonical unit (value_canonical), so they can be ranked directly. Values measured under different conditions are listed separately and are not averag

  • list_properties

    The property names in use, with their canonical unit and whether higher or lower is better. Use these names with get_material and compare.

  • get_term

    A plain-language definition of a technical term or abbreviation used on material pages, for example ARC, SoC or adiabatic.

  • find_materials

    Requirements in, candidates out. Each material gets a verdict: pass (every constraint met by a sourced value), fail, or unknown (no data on a constraint, so it cannot be ruled in or out). Every constraint reports pass, fail or no_data and the strongest evidence level behind it (f

  • list_claims

    Every current sourced value for one material (optionally one property) in canonical units, with evidence level and a claim_id. Use the claim_id with prove_claim to see the exact source and passage.

  • prove_claim

    Everything behind one value: as printed in the source, converted, the evidence level and what it means, the conditions, and each source with the place in it (and the passage where we have it).

  • what_is_missing

    For one material and a list of properties: which have sourced data (and the strongest evidence) and which have none. "no_data" means not covered yet, not known to be safe.

  • resolve_designation

    Which material a code names: a UNS number, EN number or name, DIN, JIS, AISI or SAE number, ASTM or AMS specification, or trade name (for example S31600, 1.4401, SUS316, A240). Case, spaces and hyphens do not matter, and a short code also lists the codes that start with it. Each

  • search_sources

    Full-text search over short passages quoted from our sources. Returns the passage, the source and the place in it. Passages are still being added, so an empty answer means none indexed yet.

  • find_products

    Search the catalogue of space products (satellites, platforms, structures, launchers, engines, spacesuits, rovers, observatories, stations) by what they are, who makes them, what they are made of and how. Call it first when you design or study a device: "comparable 3U CubeSat str

  • search_products

    Ranked full-text search over everything written about the products: names and aliases, summaries, specs, features, parts, materials, finishes, standards and organizations. Use it when you have a description rather than exact filters ("ablative heat shield on a Mars rover", "regen

  • get_product

    The whole record of one product: specs, features, the parts tree (assemblies, parts, material, form, finish, standard, part number, supplier, function), the materials it uses (ids that work with get_material), standards, the organizations behind it (maker, contractors, suppliers,

  • product_parts

    The flat parts list of one product in source order: assembly, part, function, material (and material id), form, finish, standard, part number, supplier, part specs, quote and source. Use it when you need the parts and not the whole record, for example "the thermal control parts o

  • products_using_material

    Every product that uses a material, with the parts, the form, finish, standard and part number, the quote and the source for each: "which products use aluminium 6061 and for which part", "what flew with Kapton and with what finish or standard". The material is an id (find it with

  • materials_used_by_function

    Which materials products use for a kind of part, with how many products and parts, example products, and the forms, finishes and standards that come with each: "I am designing a 3U CubeSat structure for LEO: what materials, forms, finishes and standards do comparable products use

  • standards_for

    The specifications named by products: standards listed for a product (with what they are used for) and the standard written on each part (anodising, chromate, welding, composites ...), each with the part function, the quote and the source where there is one. Give a product ("whic

  • orgs_for

    The organizations behind one product, each with its relation (produced_by_org, supplied_by, operated_by), its role, the relation status and the quote and source: makers, agencies, prime contractors, suppliers of named parts, operators. With include_components (default true) it al

  • products_by_maker

    Every product an organization is linked to, with its role on each (maker, contractor, supplier, operator, agency), the relation status, the quote and the source: "which products does Aerojet Rocketdyne have", "what did Almatech build". The organization is matched by id or part of

  • engines_for_vehicle

    Which engines a launcher, stage or spacecraft uses, from relations a source states (engine part of vehicle, vehicle carries engine). Each engine comes with its stage or role (role, note), the quote and source, its makers and suppliers, and the material ids in it, so you can go on

  • vehicles_for_engine

    Which vehicles and stages use an engine, from stated relations, with the stage or role, the quote and the source: "where is the Merlin 1D used", "which vehicles fly the RL10". vehicle_known false means a source names a vehicle for this engine that is not a product here (only the

  • product_graph

    The network around a product as nodes and edges: connected products (engine part of vehicle, launched on, heritage, built on, successor), the organizations (makers, suppliers, operators), the materials, and for the product and its direct neighbours also the parts with their mater

  • compare_products

    Put 2 to 6 products side by side: kind, maker, size / mass / orbit, depth label, counts, the materials each uses (and which are shared or unique), the materials per part function, the spec rows they have in common, standards, organizations and what each does not publish. Use it t

Basic checksi

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

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain spacemushroom.com (the registry checks domain ownership)

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 133 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 24 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

  • More stars than 0% of the other 32680 servers in this category
  • Published to the registry more recently than 86% of the other 32680 servers in this category
  • Basic checks equal to or better than 100% of the other 32680 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Materials safe?

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.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

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.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 5 days ago.

Which apps can use it?

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.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, EmbeddedCI BenchPod

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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EmbeddedCI BenchPod

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README from the maker

Open the README

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.

Space Mushroom MCP server

A free, read-only Model Context Protocol server for engineering materials. Every number it returns comes with its unit, the conditions it was measured under, the method and the source it was read from, so an AI assistant can quote a value and prove where it came from.

Tools

ToolWhat it does
find_materialsRequirements in, candidates out. Each material gets pass, fail or unknown, with the evidence
search_materialsFind materials by name, abbreviation or formula
get_materialThe sourced record of one material: values, conditions, uses, hazards, failure modes, corrosion, supply
compareLine several materials up on one property, each value with its conditions and source
list_propertiesProperty names in use, with canonical units
list_claimsEvery current sourced value for a material, with an evidence level and a claim id
prove_claimEverything behind one value: as printed, converted, conditions, and where in each source
what_is_missingWhich properties have sourced data and which have none (not covered yet, not "safe")
resolve_designationWhich material a code names: UNS, EN, DIN, JIS, AISI/SAE, ASTM, AMS or a trade name
search_sourcesFull-text search over short quoted passages from the sources
get_termPlain-language definition of a technical term

Add it to a client

Claude Desktop, Cursor, VS Code and other clients that accept a remote server:

{

"mcpServers": { "space-mushroom": { "url": "https://spacemushroom.com/mcp" } } }

Claude Code:

claude mcp add --transport http space-mushroom https://spacemushroom.com/mcp

Example questions

  • "Which stainless steels have a sourced minimum yield strength above 400 MPa, and what are the conditions?"
  • "What material is UNS S31600 and what is its density, with the source?"
  • "Compare PEEK, PEI and PPS on continuous service temperature."
  • "What does Space Mushroom have no data on for Ti-6Al-4V?"

How accurate is it?

Profiles are drafted with AI assistance from cited sources and then checked automatically: every value must be found in its cited source, and every designation must be printed there. Values marked ai_checked were re-read by an AI assistant, not a person. See the methodology and editorial policy. Check the source before using a value in a safety-critical design.

Citation

Space Mushroom contributors (2026). *Space Mushroom: open materials database.* https://spacemushroom.com/ (CC BY 4.0)

Contact

hello@spacemushroom.com · Report a wrong value

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