ColdState — Deterministic Knowledge Infrastructure
Deterministic knowledge for AI agents: search, fetch, cite and verify a 48M-entry knowledge base.
Connect it
Settings → Connectors → Add custom connector
URL: https://cold-api.coldstate.ai/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://cold-api.coldstate.ai/mcp{
"mcpServers": {
"knowledge": {
"url": "https://cold-api.coldstate.ai/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}claude mcp add --transport http knowledge https://cold-api.coldstate.ai/mcp --header "Authorization: <value>"{
"servers": {
"knowledge": {
"type": "http",
"url": "https://cold-api.coldstate.ai/mcp",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}16 tools, verified live
coldstate_searchread-onlySearch 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`.
coldstate_list_indexesread-onlyList all your ColdState indexes with their status, mode, document count, and domain preset.
coldstate_browse_documentsread-onlyBrowse 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 â no stored text. Map ref_id back to your own content.
coldstate_explainread-onlyExplain why a specific document ranked for a query. Returns a per-term relevance breakdown and an overall match summary â deterministic and reproducible.
coldstate_search_globalread-onlySearch 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.
coldstate_domainsread-onlyList all available knowledge domains in ColdState's global knowledge base with entry counts.
coldstate_fetchread-onlyFetch a single knowledge-base entry verbatim by its stable id (e.g. "eng_000229f438f7cebd"). Deterministic retrieval â returns the full record plus a content_hash and kb_snapshot for reproducible citation.
coldstate_citeread-onlyGet 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.
coldstate_verifyread-onlyVerify 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.
coldstate_snapshotread-onlyGet the current knowledge-base snapshot/version id. Pin this kb_snapshot for reproducibility: the same query against the same kb_snapshot returns identical results.
coldstate_relatedread-onlyFind 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 â same neighbors.
coldstate_resolveread-onlyResolve 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.
coldstate_batch_searchread-onlyRun several knowledge-base queries in one call against a single consistent kb_snapshot. Returns each query with its ranked results â efficient and snapshot-consistent across the whole batch.
coldstate_statsread-onlyDeterministic statistics. With a `query`: total matches + state distribution of the top results. Without: global knowledge-base stats (entry count, domains, snapshot).
coldstate_capabilitiesread-onlyMachine-readable manifest of this server: available tools, knowledge domains, current kb_snapshot, determinism guarantees, and limits. Call this first to self-configure.
coldstate_isomorphread-onlyCross-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.
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