ColdState — Deterministic Knowledge Infrastructure

ai.coldstate/knowledgeVersion 0.1.0

Deterministic knowledge for AI agents: search, fetch, cite and verify a 48M-entry knowledge base.

Status

Responds465 msNov 14, 2026, 13:28 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:28 UTC
Latency: 465 ms
Remotes responding: 1 of 1
Sign-in: API key
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://cold-api.coldstate.ai/mcpResponds465 msNov 14, 2026, 13:28 UTC

No sign-in

Claude Code

claude mcp add --transport http knowledge https://cold-api.coldstate.ai/mcp --header 'Authorization: Bearer <YOUR_TOKEN>'

Replace <YOUR_TOKEN> before running.

Claude Desktop and claude.ai

Settings > Connectors > Add custom connector
Name: knowledge
Remote MCP server URL: https://cold-api.coldstate.ai/mcp
This server expects the header Authorization.

Cursor

{
  "mcpServers": {
    "knowledge": {
      "url": "https://cold-api.coldstate.ai/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_TOKEN>"
      }
    }
  }
}

Replace <YOUR_TOKEN> before running.

VS Code

code --add-mcp '{"name":"knowledge","type":"http","url":"https://cold-api.coldstate.ai/mcp","headers":{"Authorization":"Bearer <YOUR_TOKEN>"}}'

Replace <YOUR_TOKEN> before running.

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Tools

16 tools

Tools of ColdState — Deterministic Knowledge Infrastructure
	Description		Read-only	Idempotent	Open world
`coldstate_batch_search`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.	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.	No	Yes	Yes	Not declared
`coldstate_browse_documents`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.	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.	No	Yes	Yes	Not declared
`coldstate_capabilities`Machine-readable manifest of this server: available tools, knowledge domains, current kb_snapshot, determinism guarantees, and limits. Call this first to self-configure.	Machine-readable manifest of this server: available tools, knowledge domains, current kb_snapshot, determinism guarantees, and limits. Call this first to self-configure.	No	Yes	Yes	Not declared
`coldstate_cite`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.	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.	No	Yes	Yes	Not declared
`coldstate_domains`List all available knowledge domains in ColdState's global knowledge base with entry counts.	List all available knowledge domains in ColdState's global knowledge base with entry counts.	No	Yes	Yes	Not declared
`coldstate_explain`Explain why a specific document ranked for a query. Returns a per-term relevance breakdown and an overall match summary — deterministic and reproducible.	Explain why a specific document ranked for a query. Returns a per-term relevance breakdown and an overall match summary — deterministic and reproducible.	No	Yes	Yes	Not declared
`coldstate_fetch`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.	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.	No	Yes	Yes	Not declared
`coldstate_isomorph`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.	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.	No	Yes	Yes	Not declared
`coldstate_list_indexes`List all your ColdState indexes with their status, mode, document count, and domain preset.	List all your ColdState indexes with their status, mode, document count, and domain preset.	No	Yes	Yes	Not declared
`coldstate_related`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.	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.	No	Yes	Yes	Not declared
`coldstate_resolve`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.	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.	No	Yes	Yes	Not declared
`coldstate_search`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`.	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`.	No	Yes	Yes	Not declared
`coldstate_search_global`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.	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.	No	Yes	Yes	Not declared
`coldstate_snapshot`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.	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.	No	Yes	Yes	Not declared
`coldstate_stats`Deterministic statistics. With a `query`: total matches + state distribution of the top results. Without: global knowledge-base stats (entry count, domains, snapshot).	Deterministic statistics. With a `query`: total matches + state distribution of the top results. Without: global knowledge-base stats (entry count, domains, snapshot).	No	Yes	Yes	Not declared
`coldstate_verify`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.	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.	No	Yes	Yes	Not declared

Details

Registry status: Active
Published: Sep 30, 2026
Updated: Sep 30, 2026
Website: https://services.coldstate.ai/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Knowledge and notesSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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