ColdState — Deterministic Knowledge Infrastructure
REMOTE · COLD-API.COLDSTATE.AI · SCANNED OCT 5
Deterministic knowledge for AI agents: search, fetch, cite and verify a 48M-entry knowledge base.
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 Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- 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 Usability77
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1226 tokens (~76/item across 16 items; 16 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management17
- Stability observed for 5 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 16 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 16 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 ColdState — Deterministic Knowledge Infrastructure MCP server?
ColdState — Deterministic Knowledge Infrastructure is a hosted endpoint at https://cold-api.coldstate.ai/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 · cold-api.coldstate.ai
claude mcp add --transport http ai-coldstate-knowledge 'https://cold-api.coldstate.ai/mcp'
{
"mcpServers": {
"ai-coldstate-knowledge": {
"url": "https://cold-api.coldstate.ai/mcp"
}
}
} {
"servers": {
"ai-coldstate-knowledge": {
"type": "http",
"url": "https://cold-api.coldstate.ai/mcp"
}
}
} [mcp_servers.ai-coldstate-knowledge] url = "https://cold-api.coldstate.ai/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"ai-coldstate-knowledge": {
"type": "remote",
"url": "https://cold-api.coldstate.ai/mcp",
"enabled": true
}
}
} openclaw mcp add ai-coldstate-knowledge --url 'https://cold-api.coldstate.ai/mcp' --transport streamable-http
mcp_servers:
ai-coldstate-knowledge:
url: "https://cold-api.coldstate.ai/mcp" {
"McpServers": {
"ai-coldstate-knowledge": {
"Transport": "http",
"Url": "https://cold-api.coldstate.ai/mcp"
}
}
} assistant mcp add ai-coldstate-knowledge -t streamable-http -u 'https://cold-api.coldstate.ai/mcp'
{
"mcpServers": {
"ai-coldstate-knowledge": {
"type": "http",
"url": "https://cold-api.coldstate.ai/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.
- 4 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 30 Sept 26 74
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 5 Oct 2026 · Probed https://cold-api.coldstate.ai/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=coldstate.ai | CN=WE1,O=Google Trust Services,C=US | 8 Sept 2026 | 7 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 7a1458630a18a4bb0ec38fdace4daa2b |
| SANs: coldstate.ai, *.coldstate.ai | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of cold-api.coldstate.ai. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| ai. | present | 3799 | 8 | Verified |
| coldstate.ai. | 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=31536000; includeSubDomains; preload |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | no-referrer |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://cold-api.coldstate.ai/mcp | Verified | 200 | |
| http (plaintext) | http://cold-api.coldstate.ai/mcp | HTTPS enforced | 301 | https://cold-api.coldstate.ai/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 →
coldstate_batch_search ~80
Run several knowledge-base queries in one call against a single consistent kb_snapshot. Returns each query with its ranked results — efficient and snapshot-consistent across the whole batch.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | – | Optional domain filter applied to all queries |
| limit | integer | – | Max results per query |
| queries | array | yes | 1–10 queries |
No output schema declared.
No examples provided.
coldstate_browse_documents ~93
Browse documents in a ColdState index. Indexes are zero-knowledge, so each document is returned as your ref_id plus its state classification and E-score — no stored text. Map ref_id back to your own content.
| Name | Type | Req | Description |
|---|---|---|---|
| index_id | string | yes | Index ID, e.g. idx_... |
| limit | integer | – | Max documents to return |
| offset | integer | – | Offset for pagination |
No output schema declared.
No examples provided.
coldstate_capabilities ~42
Machine-readable manifest of this server: available tools, knowledge domains, current kb_snapshot, determinism guarantees, and limits. Call this first to self-configure.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
coldstate_cite ~63
Get a canonical, reproducible citation for a knowledge entry by id (title, domain, source, content_hash, kb_snapshot). Cite a fact so it can be re-verified later with coldstate_verify.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Stable knowledge entry id |
No output schema declared.
No examples provided.
coldstate_domains ~25
List all available knowledge domains in ColdState's global knowledge base with entry counts.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
coldstate_explain ~88
Explain why a specific document ranked for a query. Returns a per-term relevance breakdown and an overall match summary — deterministic and reproducible.
| Name | Type | Req | Description |
|---|---|---|---|
| doc_id | string | yes | Document ID, e.g. "doc_42" or "42" |
| index_id | string | yes | Index ID, e.g. idx_... |
| query | string | yes | The search query to explain against |
No output schema declared.
No examples provided.
coldstate_fetch ~79
Fetch a single knowledge-base entry verbatim by its stable id (e.g. "eng_000229f438f7cebd"). Deterministic retrieval — returns the full record plus a content_hash and kb_snapshot for reproducible citation.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Stable knowledge entry id, e.g. eng_... or soc_... |
No output schema declared.
No examples provided.
coldstate_isomorph ~93
Cross-domain structural analog: given a knowledge entry id, find its closest structural twin in each OTHER domain ("same structure, different domain"). Deterministic. Use coldstate_resolve to turn a name into an id first.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Stable knowledge entry id, e.g. eng_... or soc_... |
| limit | integer | – | Max cross-domain analogs (one per domain) |
No output schema declared.
No examples provided.
coldstate_list_indexes ~29
List all your ColdState indexes with their status, mode, document count, and domain preset.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
coldstate_related ~87
Find knowledge entries deterministically related to a given entry id via ColdState's concept-cluster graph. Returns same-cluster and neighboring-cluster entries, each tagged with its relation and a cross_domain flag. Same id ⇒ same neighbors.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Stable knowledge entry id, e.g. eng_... or soc_... |
| limit | integer | – | Max related entries |
No output schema declared.
No examples provided.
coldstate_resolve ~94
Resolve a name, alias, or surface form to its canonical ColdState knowledge entry (id + title). Deterministic: an exact title match wins, else the top relevance-Ψ entry. Returns the canonical entry plus alternatives. Use the returned id with coldstate_fetch / coldstate_related.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max alternative candidates |
| query | string | yes | The name/term/alias to resolve |
No output schema declared.
No examples provided.
coldstate_search ~134
Search a ColdState index by collection name or index ID. Returns ranked results with Ψ scores and state classification (CRYSTALLINE/FLUID/REACTIVE/DECOHERENT). Provide exactly one of `collection` or `index_id`.
| Name | Type | Req | Description |
|---|---|---|---|
| collection | string | – | Collection name to search (mutually exclusive with index_id) |
| index_id | string | – | Index ID to search, e.g. idx_... (mutually exclusive with collection) |
| limit | integer | – | Max results to return |
| offset | integer | – | Offset for pagination |
| query | string | yes | The search query |
No output schema declared.
No examples provided.
coldstate_search_global ~129
Search ColdState's global knowledge base (48.4M+ entries across 35 domains including SCIENCE, MEDICINE, TECHNOLOGY, HISTORY, etc). Returns deterministically ranked results with Ψ relevance scores and a state classification. Optionally filter by domain.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | – | Filter by knowledge domain (e.g. MEDICINE, SCIENCE, TECHNOLOGY, HISTORY, LAW, CODE). Case-insensitive. |
| limit | integer | – | Max results to return |
| offset | integer | – | Offset for pagination |
| query | string | yes | The search query |
No output schema declared.
No examples provided.
coldstate_snapshot ~38
Get the current knowledge-base snapshot/version id. Pin this kb_snapshot for reproducibility: the same query against the same kb_snapshot returns identical results.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
coldstate_stats ~71
Deterministic statistics. With a `query`: total matches + state distribution of the top results. Without: global knowledge-base stats (entry count, domains, snapshot).
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | – | Optional domain filter (with query) |
| query | string | – | Optional query to get coverage/state stats for |
No output schema declared.
No examples provided.
coldstate_verify ~81
Verify a previously-cited knowledge fact is unchanged. Provide the entry id and the content_hash you stored earlier; returns whether it still matches the current knowledge base. The trust primitive for AI-to-AI fact-checking.
| Name | Type | Req | Description |
|---|---|---|---|
| content_hash | string | yes | The content_hash from a previous fetch/cite |
| id | string | yes | Stable knowledge entry id |
No output schema declared.
No examples provided.
What is the ColdState — Deterministic Knowledge Infrastructure MCP server?
ColdState — Deterministic Knowledge Infrastructure is an MCP server listed in the public MCP registry as ai.coldstate/knowledge. Deterministic knowledge for AI agents: search, fetch, cite and verify a 48M-entry knowledge base. This page covers its hosted endpoint (https://cold-api.coldstate.ai/mcp).
Is the ColdState — Deterministic Knowledge Infrastructure MCP server safe to use?
ColdState — Deterministic Knowledge Infrastructure scores 76 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 ColdState — Deterministic Knowledge Infrastructure MCP server expose?
ColdState — Deterministic Knowledge Infrastructure exposes 16 tools: coldstate_search, coldstate_list_indexes, coldstate_browse_documents, coldstate_explain, coldstate_search_global, and 11 more. Their descriptions and schemas cost roughly 1,226 tokens of context every time the server is loaded.
Does the ColdState — Deterministic Knowledge Infrastructure MCP server require authentication?
No. We connected to ColdState — Deterministic Knowledge Infrastructure without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the ColdState — Deterministic Knowledge Infrastructure MCP server still maintained?
ColdState — Deterministic Knowledge Infrastructure is still listed as active in the MCP registry. We last reached this channel on 5 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.