GuestGraph
REMOTE · MCP.GUESTGRAPH.IO · SCANNED SEP 28
GuestGraph: One guest, not five strangers
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 14 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability72
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 2159 tokens (~154/item across 14 items; 14 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management13
- Stability observed for 4 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage88
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 56% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the GuestGraph MCP server?
GuestGraph is a hosted endpoint at https://mcp.guestgraph.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.guestgraph.io
claude mcp add --transport http io-guestgraph-mental-model 'https://mcp.guestgraph.io/mcp'
{
"mcpServers": {
"io-guestgraph-mental-model": {
"url": "https://mcp.guestgraph.io/mcp"
}
}
} {
"servers": {
"io-guestgraph-mental-model": {
"type": "http",
"url": "https://mcp.guestgraph.io/mcp"
}
}
} [mcp_servers.io-guestgraph-mental-model] url = "https://mcp.guestgraph.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-guestgraph-mental-model": {
"type": "remote",
"url": "https://mcp.guestgraph.io/mcp",
"enabled": true
}
}
} openclaw mcp add io-guestgraph-mental-model --url 'https://mcp.guestgraph.io/mcp' --transport streamable-http
mcp_servers:
io-guestgraph-mental-model:
url: "https://mcp.guestgraph.io/mcp" {
"McpServers": {
"io-guestgraph-mental-model": {
"Transport": "http",
"Url": "https://mcp.guestgraph.io/mcp"
}
}
} assistant mcp add io-guestgraph-mental-model -t streamable-http -u 'https://mcp.guestgraph.io/mcp'
{
"mcpServers": {
"io-guestgraph-mental-model": {
"type": "http",
"url": "https://mcp.guestgraph.io/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Sept 26 +1
- Server version: 0.30.0 → 0.31.0 functional
- New tool “diagram” functional
- 25 Sept 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 24 Sept 26 65
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 28 Sept 2026 · Probed https://mcp.guestgraph.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=mcp.guestgraph.io | CN=WR3,O=Google Trust Services,C=US | 24 Sept 2026 | 23 Dec 2026 | RSA 2048 | SHA256-RSA | a38a8f9960c095490ad74df11585e2c1 |
| SANs: mcp.guestgraph.io | ||||||
| CN=WR3,O=Google Trust Services,C=US (CA) | CN=GTS Root R1,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | RSA 2048 | SHA256-RSA | 7ff005a91568d63abc22861684aa4b5a |
| CN=GTS Root R1,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 19 Jun 2020 | 28 Jan 2028 | RSA 4096 | SHA256-RSA | 77bd0d6cdb36f91aea210fc4f058d30d |
| CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 1 Sept 1998 | 28 Jan 2028 | RSA 2048 | SHA1-RSA | 40000000001154b5ac394 |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.guestgraph.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| guestgraph.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31556926 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.guestgraph.io/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.guestgraph.io/mcp | HTTPS enforced | 301 | https://mcp.guestgraph.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
describe_errors ~98
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`.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| errors | array | yes | – |
| model | object | yes | – |
| schema | object | yes | – |
No examples provided.
describe_relations ~127
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.
| Name | Type | Req | Description |
|---|---|---|---|
| direction | string | – | – |
| type | string | – | – |
| via | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| enums | array | yes | – |
| forms | object | yes | – |
| joins | array | yes | – |
| lists | array | yes | – |
| model | object | yes | – |
| ownership | array | yes | – |
| reading | object | yes | – |
| relations | array | yes | – |
No examples provided.
describe_rule ~82
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.
| Name | Type | Req | Description |
|---|---|---|---|
| rule | string | yes | A rule's number from list_rules, such as R9 |
| Name | Type | Req | Description |
|---|---|---|---|
| model | object | yes | – |
| part | string|null | yes | – |
| rule | string | yes | – |
| text | string | yes | – |
| title | string | yes | – |
| url | string|null | yes | – |
No examples provided.
describe_schema ~98
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.
| Name | Type | Req | Description |
|---|---|---|---|
| type | string | yes | A type name from list_types, such as skill |
| Name | Type | Req | Description |
|---|---|---|---|
| model | object | yes | – |
| name | string | yes | – |
| relations | object | yes | – |
| sections | array | yes | – |
| tagline | string | yes | – |
| type | string | yes | – |
| url | string|null | yes | – |
No examples provided.
diagram ~173
A picture of the model as Mermaid, from its edges or its schemas. Use to show connections; for edges as data use list_references. Input: `shape`; `id`, `domain` or `type` narrow it. Returns `mermaid`, `nodes`, `links`, `title`, `edges`, `omitted`, schema's `everyType`. A process draws each gate's failure dashed, to a phase or one Stop node, outside `nodes`. At most 50 nodes.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | – | A domain's id, to draw its concepts |
| id | string | – | The process to draw, or the entity at the middle of a neighborhood |
| shape | string | yes | – |
| type | string | – | A type, to draw its schema and the types it is declared with |
| Name | Type | Req | Description |
|---|---|---|---|
| edges | integer | yes | – |
| everyType | array | – | – |
| links | array | yes | – |
| mermaid | string | yes | – |
| model | object | yes | – |
| nodes | array | yes | – |
| omitted | integer | yes | – |
| shape | string | yes | – |
| title | string|null | yes | – |
No examples provided.
fetch ~87
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | – |
| model | object | yes | – |
| text | string | yes | – |
| title | string | yes | – |
| type | string | yes | – |
| url | string|null | yes | – |
No examples provided.
find_evidence ~170
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.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | `page.nextCursor` from the previous answer, sent with the same arguments; omit it for the first page. |
| limit | integer | – | Entries per page: 50 by default, clamped to 1–200, so 0 returns one entry and 1000 returns 200. |
| skill | string | yes | The skill's id or canonical name |
| Name | Type | Req | Description |
|---|---|---|---|
| evidence | object | yes | – |
| model | object | yes | – |
| page | object | yes | – |
| skill | object | yes | – |
No examples provided.
get_entity ~133
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | – | The entity's id, as any answer gives it |
| name | string | – | The canonical name, the entity's H1; needs type |
| type | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| entity | object | yes | – |
| model | object | yes | – |
No examples provided.
list_checks ~84
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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| checks | array | yes | – |
| model | object | yes | – |
| ranBy | string | yes | – |
No examples provided.
list_entities ~196
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`.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | `page.nextCursor` from the previous answer, sent with the same arguments; omit it for the first page. |
| limit | integer | – | Entries per page: 50 by default, clamped to 1–200, so 0 returns one entry and 1000 returns 200. |
| owner | string | – | An owner's id, to keep its entities |
| type | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| entities | array | yes | – |
| model | object | yes | – |
| page | object | yes | – |
| type | string | yes | – |
No examples provided.
list_references ~202
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`.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | `page.nextCursor` from the previous answer, sent with the same arguments; omit it for the first page. |
| direction | string | – | – |
| entity | string | – | – |
| limit | integer | – | Entries per page: 50 by default, clamped to 1–200, so 0 returns one entry and 1000 returns 200. |
| type | string | – | – |
| via | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| edges | array | yes | – |
| model | object | yes | – |
| page | object | yes | – |
No examples provided.
list_rules ~83
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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| model | object | yes | – |
| rules | array | yes | – |
| tagline | string | yes | – |
| url | string|null | yes | – |
No examples provided.
list_types ~71
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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| model | object | yes | – |
| types | array | yes | – |
No examples provided.
search ~215
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`: name matches first, then a listing.
| Name | Type | Req | Description |
|---|---|---|---|
| cursor | string | – | `page.nextCursor` from the previous answer, sent with the same arguments; omit it for the first page. |
| limit | integer | – | Entries per page: 50 by default, clamped to 1–200, so 0 returns one entry and 1000 returns 200. |
| match | string | – | – |
| owner | string | – | An owner's id, to keep its entities |
| query | string | yes | – |
| type | string | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| match | string | yes | – |
| model | object | yes | – |
| page | object | yes | – |
| query | string | yes | – |
| results | array | yes | – |
| words | array | – | – |
No examples provided.
What is the GuestGraph MCP server?
GuestGraph is an MCP server listed in the public MCP registry as io.guestgraph/mental-model. GuestGraph: One guest, not five strangers. This page covers its hosted endpoint (https://mcp.guestgraph.io/mcp).
Is the GuestGraph MCP server safe to use?
GuestGraph scores 67 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the GuestGraph MCP server expose?
GuestGraph exposes 14 tools: list_types, describe_schema, describe_relations, list_rules, describe_rule, and 9 more. Their descriptions and schemas cost roughly 1,819 tokens of context every time the server is loaded.
Does the GuestGraph MCP server require authentication?
No. We connected to GuestGraph without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the GuestGraph MCP server still maintained?
GuestGraph is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.