MaterialsCodeGraph is an MCP server with 15 tools an agent can call, among them mcg_archive, mcg_cancel_run, mcg_catalog. It answers at https://api.materialscodegraph.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 4 of 4 times since 23 September 2026; the last check, on 6 November 2026, succeeded.
Materials simulations for AI agents over MCP: binding token quote before every run, record after it.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
mcg_archive | Archive or unarchive a simulation you own. Archiving hides it from the app's lists and studies; its runs, artifacts and spend are untouched, its direct link still opens, and archived false restores it. Use it to clear drafts that never ran Inputs: simulation_id, archived |
mcg_cancel_run | Cancel a run from any non-terminal state before collecting (a collecting run's outputs are delivered and charged: 409). The cancel request is recorded immediately and returns run_id and cancel_requested true (and a note, for a running campa Inputs: run_id |
mcg_catalog | Enabled simulation kinds (each with example mcg_quote arguments that price, a note naming what must exist first, or both; traced says whether the kind's default lineage has a single public OpenMaterials node pin, traced_note why or why not; |
mcg_clusters | Connected clusters: id, name, preset (hive or auto), status (pending until the agent's first sync; connected; stale: the agent stopped syncing; revoked; scheduler_down: the agent syncs but cannot reach the scheduler, nothing is offered; age |
mcg_delete_study | Delete a study you own: the study and its membership list go. Its simulations, runs, artifacts and spend are untouched and stay reachable by id and in mcg_list_runs. Refused while the study has documents or a live public link (remove those Inputs: study_id |
mcg_fetch_artifacts | List a run's collected artifacts as a typed manifest: artifacts, a list of path, bytes, stage and sha256 per file, plus removed on a file the retention sweep deleted (its bytes are gone; do not fetch it) and attribution on a third-party mod Inputs: run_id |
mcg_get_artifact | Fetch one artifact file's TEXT content, up to max_bytes (default 65536), with an explicit truncation note. Binary content REJECTS with unsupported_content; fetch binaries from the run's public page. A third-party model's file returns its fu Inputs: run_id, path, max_bytes |
mcg_get_run | Fetch a run's state, event timeline and LLM spend. The payload leads with a derived summary (state, current_stage, billing {quoted_tokens, charged_tokens, hold, policy}, fault, refusal, next, last event, campaign) for cheap polling, then ap Inputs: run_id |
mcg_get_study | Fetch a study (the project a quote's `study` named) with its member simulations and their latest runs. Pass study_id or the exact name. Returns study, members (each with app_url) and app_url. Inputs: study_id, name |
mcg_list_runs | List runs, newest first: every run of this key's owner, or one quote's runs when quote_id is given. Returns at most limit rows (default 20, maximum 100). Each row carries state, spend_tokens, created_by_key_name (null when launched in the b Inputs: quote_id, limit, before |
mcg_quote | Price a simulation. FREE: no hardware starts. Returns quote_id, quote_hash, tokens, rate_card_version, wall_s, expires_at, resource_class, resource_label and sku (the GPU class the quote is bound to, its name, and the offer SKU it priced; n Inputs: kind, name, spec, engine, study, material |
mcg_rates | The public rate card: token_usd, overheads, rate_card_version. FREE, no arguments; also a connectivity check. |
mcg_run | Launch the quoted simulation. SPENDS TOKENS: provisions hardware and bills the account. Requires the quote_id and quote_hash from mcg_quote (a stale hash or an expired quote REJECTS: re-quote and retry) and a client-generated idempotency_ke Inputs: quote_id, quote_hash, idempotency_key, max_tokens |
mcg_stage | Create a DRAFT simulation whose input files are uploaded before pricing. FREE. Takes the same kind, spec, study, material and conditions as mcg_quote plus inputs: one entry per file the run needs, each with a name and, for small text files, Inputs: kind, name, spec, engine, study, material |
mcg_study_members | Add simulations to a study and remove them from it. You must own the study (get its id from mcg_get_study) and every listed simulation; a missing one is named and nothing changes. add appends in order (a member already present keeps its pla Inputs: study_id, add, remove |
Every block below points at https://api.materialscodegraph.com/mcp. Pick your client and copy.
claude mcp add --transport http materialscodegraph https://api.materialscodegraph.com/mcp
{
"mcpServers": {
"materialscodegraph": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://api.materialscodegraph.com/mcp"]
}
}
}{
"mcpServers": {
"materialscodegraph": {
"url": "https://api.materialscodegraph.com/mcp"
}
}
}{
"servers": {
"materialscodegraph": {
"type": "http",
"url": "https://api.materialscodegraph.com/mcp"
}
}
}{
"context_servers": {
"materialscodegraph": {
"url": "https://api.materialscodegraph.com/mcp"
}
}
}{
"mcpServers": {
"materialscodegraph": {
"serverUrl": "https://api.materialscodegraph.com/mcp"
}
}
}{
"mcpServers": {
"materialscodegraph": {
"url": "https://api.materialscodegraph.com/mcp"
}
}
}name: MaterialsCodeGraph
version: 0.0.1
schema: v1
mcpServers:
- name: MaterialsCodeGraph
type: streamable-http
url: https://api.materialscodegraph.com/mcp{
"mcpServers": {
"materialscodegraph": {
"httpUrl": "https://api.materialscodegraph.com/mcp"
}
}
}{
"mcpServers": {
"materialscodegraph": {
"type": "http",
"url": "https://api.materialscodegraph.com/mcp"
}
}
}{
"mcpServers": {
"materialscodegraph": {
"url": "https://api.materialscodegraph.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fapi.materialscodegraph.com%2Fmcp&type=streamable_http&id=materialscodegraph&name=MaterialsCodeGraph
It answered our last check on 6 November 2026 in 274 ms. Over 4 checks since 23 September 2026 it answered 4. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by materialscodegraph.com and served from api.materialscodegraph.com, the vendor's own domain: https://api.materialscodegraph.com/mcp.
15, as returned by the server's own tools/list on 11 November 2026: mcg_archive, mcg_cancel_run, mcg_catalog, mcg_clusters, mcg_delete_study, mcg_fetch_artifacts, mcg_get_artifact, mcg_get_run, and 7 more.
It answered our last check on 6 November 2026 in 274 ms. Over 4 checks since 23 September 2026 it answered 4.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://api.materialscodegraph.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.materialscodegraph. Endpoint host: api.materialscodegraph.com. ARD identifier: urn:air:com.materialscodegraph:mcp:mcg.
First indexed 19 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.