MaterialsCodeGraph

Connect Remote server

claude mcp add --transport http mcg https://api.materialscodegraph.com/mcp --header "Authorization: Bearer <YOUR_API_KEY>"

{
  "mcpServers": {
    "mcg": {
      "url": "https://api.materialscodegraph.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "mcg": {
      "type": "http",
      "url": "https://api.materialscodegraph.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://api.materialscodegraph.com/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 17 found in our last check

• 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; research coordinators instead expose r…

• mcg_rates

  The public rate card: token_usd, overheads, rate_card_version. FREE, no arguments; also a connectivity check.

• 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; null when none was chosen), resource_opt…

• 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; agent_outdated: an auto cluster's agent se…

• 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, the text inline (staged immediately).…

• 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_key (replaying it returns the existing ru…

• 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 browser), study, headline (the AI brief'…

• 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 (with summary and parent_id), parent (the project it is filed under, or null), children (its subprojects with run counts by state…

• 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 place); remove takes a simulation out of t…

• mcg_list_studies

  Your projects and their subprojects. A project is a study with no parent; a subproject is a study filed under one project. Each entry carries id, name, summary (one line, may be empty), n_members (unarchived simulations) and app_url; each project lists its subprojects, oldest fi…

• mcg_update_study

  Describe and file a study you own. name renames it; summary sets its one-line purpose; story_md replaces its long narrative. parent_id files it under a project (null makes it a project again); parent_name does the same by exact project name and creates that project if you have n…

• 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. A deleted project's subprojects become projects. Refused while the study has documents or a live public link (rem…

• 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 (they cannot be deleted once quoted). R…

• 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 app_url (the run page, for the human), st…

• 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 campaign); the platform kills the machine an…

• 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 model's file (its license notice; keep it…

• 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 full license notice first, as an [attribu…

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