io.companygraph/mental-model

up checked 2026-11-11T10:37:33.580Z

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Publisher-provided title

CompanyGraph

Publisher-provided description

CompanyGraph: Written once, read by both

Summary by lookupd

Lets an agent browse, search, and query a structured company knowledge graph of entities, schemas, and their references.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http mental-model https://mcp.companygraph.io/mcp

Codex, remote (streamable-http)

codex mcp add mental-model --url https://mcp.companygraph.io/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "mental-model": {
      "url": "https://mcp.companygraph.io/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (14 tools)

Publisher-provided text

• list_types Every type the model's schemas declare. Use first, to learn which types exist before listing or describing one. No input. Returns `types`, each with `type`, `na
• describe_schema One type's schema: its sections as written and its declared relations as data. Use to learn what an entity of the type may hold; for the whole vocabulary use de
• describe_relations What the schemas declare between types: references with form and cardinality, ownership, enums, joins, list kinds. Use for a diagram or audit; for one type's fu
• list_rules The vocabulary's conventions the model is held to, R0 onwards, from its core's CONVENTIONS.md. Use to resolve a number a schema or refusal cites, such as R9. A
• describe_rule One convention of the vocabulary as written, not a company's own rule (an entity of type `rule`: list_entities, get_entity). Input: `rule`, a number from list_r
• list_checks The checks the model's own gate runs, from the checker release this server was built with. Use to see which rules a script enforces and which are left to a read
• describe_errors What a refused call looks like. A tool's output schema covers its answers only, so use this once, to branch on refusals or validate them. No input. Returns `err
• list_entities Entities with their frontmatter's short facts, in address order or newest first. Use to browse, or for what runs on a date, came last or has a value; to find by
• get_entity One entity as structured data: fields, sections, tables, references both ways. Use to reason over one; for its page as written use fetch. Input: `id` or address
• list_references The model's edges, filtered and paged. Use to inspect one entity's relations or one kind of reference without taking whole entities. Optional `entity` (an id or
• find_evidence Every edge into one skill, grouped by the type of the page that drew it. Use to check a claimed skill against its evidence. Input: `skill`, an id, canonical nam
• search Find entities by words, substring or exact name. `match: "words"` needs every query word's stem in name, tagline, fields, sections or cells; `"text"` (default)
• fetch One entity's page as written. Use to quote or display the source; for structured fields and references use get_entity. Input: `id` or address, from search, list
• diagram A picture of the model as Mermaid; edge data: list_references. Input: `shape`; `id`, `domain`, `type` or `unit` narrow it. aggregate, flow, lifecycle take a con

Details

• Version: 1.0.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 1203 ms
• First indexed: 2026-11-01T09:02:58.668Z
• Last seen in registry: 2026-11-01T09:02:58.668Z

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