GuestGraph MCP server

• describe_errorsFree

  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 `errors`, every `code` with `when` it is raised and the JSON Schema of its `details`, and `schema`, the JSON Schema of a whole refusal: `error` with `code`, `message`, `rule`, `details`, beside `model`.

• describe_relationsFree

  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 full schema use describe_schema. Optional `type` narrows every list, `direction` (declares, declared-to, both; needs `type`) one side of relations, `via` relations and enums. Returns those lists, with `forms` and `reading` explaining every term. Not paged.

• describe_ruleFree

  One rule as written. Input: `rule`, a number from list_rules such as R9, in either case. Returns `rule`, `title`, `part`, `text` and the file's `url`. An unknown number is refused with the known ones listed.

• describe_schemaFree

  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 describe_relations. Input: `type`. Returns `url`, the schema's own file, `sections`, and `relations`: owner, owns, references both ways, enums, joins and lists.

• fetchFree

  One entity's page as written. Use to quote or display the source; for structured fields and references use get_entity. Input: `id`, from search, list_entities or any reference. Returns `id`, `title`, `type`, `url` and `text`, the Markdown source. Takes no name: search with match "name" finds the id.

• find_evidenceFree

  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 or canonical name; optional `limit`, `cursor`. Returns `skill`, `evidence` and `page`; a profile's claim arrives via Skills.Skill with its level, an evidence row via Evidence.Skill. Attributes are verbatim.

• get_entityFree

  One entity as structured data: fields, sections, tables and its references both ways. Use to reason over an entity; for its page as written use fetch. Input: `id`, or `type` and `name`; an ambiguous name is refused with candidate ids. Returns `entity`. Each reference list holds at most 50 edges; `referenceCounts` gives the totals and list_references the rest.

• list_checksFree

  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 reader. No input. Returns `checks`, each with `name`, `rule` and that rule's `title`, and `ranBy`. A list and no verdict: this server runs none of them.

• list_entitiesFree

  The entities of one type, by id. Use to browse a type; to find an entity by words or by name use search. Input: `type`, optional `owner` (an id) to keep one owner's entities, `limit` (default 50, at most 200) and `cursor`. Returns `entities` with `id`, `type`, `name`, `tagline`, `owner`, and `page`; follow `page.nextCursor` while `page.hasMore`.

• list_referencesFree

  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), `direction` (out, in, both; needs `entity`), `via`, `type` (the far end's type, or either end's without `entity`), `limit`, `cursor`. Returns `edges`, each `from`, `via`, `to`, `attrs`, and `page`.

• list_rulesFree

  The rules the model is held to, from the CONVENTIONS.md its core vendors. Use to resolve a rule number that a schema or a refusal cites, such as R9. No input. Returns `tagline`, the file's `url`, and `rules`, each with `rule`, `title` and `part`; describe_rule gives one rule's text.

• list_typesFree

  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`, `name`, `tagline`, `owner` (the type it nests under, or null) and `count`, the entities it holds.

• searchFree

  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) is a case-insensitive substring over the same; `"name"` the exact canonical name. Optional `type`, `owner`, `limit`, `cursor`. Returns `results` with `id`, `title`, `type`, `matched`, `words` in words mode, and `page`: a listing, not a ranking.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 1329ms20/20
• Tool poisoning13 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenanceno repository listed3/15
• Maintainer identityno repository or website to verify2/10

GuestGraph: common questions

Is GuestGraph MCP server safe?

With care: it is graded C, so read the findings first (67/100). Read the GuestGraph safety report

How do I install GuestGraph?

It runs remotely at mcp.guestgraph.io. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does GuestGraph need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is GuestGraph maintained?

The latest release is v0.1.0.

Is GuestGraph up?

100% of our last 11 checks got an answer. We check remote servers about four times a day.