https://api.daystruct.ai/mcp ↗
Sourced software, security and AI evidence, plus scoped requests for specialist agent help.
Daystruct is a remote MCP server published at api.daystruct.ai. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 1,107 ms, a delay an agent will notice. It exposes a broad tool surface of 16 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
get_entity_evidence — Description doesn't clarify when this tool is needed vs. 'search_entities'select_model — Parameter dependencies (e.g., minContextWindow vs. capabilities) are not explicitly definedlookup_vulnerability — Truncated description ('fields come back as cl') suggests incomplete documentationRisk: low
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
daystruct_statusRead the public Daystruct manifest and current capabilities.
search_entitiesSearch normalized entities by databank, type, provider, or capability.
databankstringtypestringproviderstringcapabilitystringmodelTypestringminContextWindowintegerlanestringlimitintegerget_entity_evidenceRead canonical facts, aliases, history, and provenance for an entity.
entityIdstringrequiredget_context_contractRead a databank's identity, temporal, dimension, and context-packet contract.
databankstringrequiredanswer_software_questionsResolve up to four package/API questions and an optional runtime compatibility check.
claimsarrayrequiredcompatibilityobjectcheck_security_exposureGiven a package and the version you are running, return the known vulnerabilities that affect it, worst first, each with the version that fixes it. Advisories whose affected range could not be parsed are returned under undetermined; treat undetermined as unanswered, never as safe.
packagestringrequiredversionstringrequiredecosystemstringlookup_vulnerabilityGiven a vulnerability identifier such as a CVE, return what is held about it: the affected package and version range, the version that fixes it, severity, and whether it is recorded as known-exploited. Use this when you have an identifier rather than a package you are running. Fields come back as claims carrying their own authority. status 'known' with authority 'exclusive' means Daystruct has evidence for the value; if you hold a different value, treat it as a conflict to resolve. status 'unknown' with authority 'non_exclusive' means Daystruct has no evidence either way -- an absence of evidence, which does not contradict or supersede anything you already know: keep what you independently know, and stay uncertain if you do not. A field returned as null means Daystruct looked and holds not
cvestringrequiredcheck_release_supportGiven a product and version, return whether that release line is supported, in security-fix-only maintenance, or past end of life, with the dates behind the answer and the cycles you could upgrade into. A line with no published end-of-life returns undetermined rather than supported.
productstringrequiredversionstringrequiredselect_modelGiven a need -- minimum context window, required capabilities, a price ceiling -- return the models that satisfy it, cheapest input price first, with the corroboration behind each record so you can judge how well-sourced it is. Prices are per million tokens. A model with no published price is returned under undetermined rather than excluded, so an unpriced model never reads as a disqualified one. This returns candidates and their evidence, not a recommendation.
minContextWindowintegercapabilitiesarraymaxInputPricePerMillionTokensnumbermaxOutputPricePerMillionTokensnumberproviderstringlimitintegerread_recent_evidence_changesRead the bounded canonical change feed.
limitintegerget_daystruct_validated_guidanceRetrieve reviewed Frontier guidance scoped to an exact databank, task family and tested model. Returns only live, unexpired promotions and their evidence limits; never private test fixtures.
databankstringrequiredtaskFamilystringrequiredmodelstringrequiredlist_daystruct_guidance_scopesFind task families and exact tested models with live Frontier guidance for a databank, before requesting that guidance.
databankstringrequiredDerived by comparing consecutive probes — changes in era, protocol version, build and reachability.
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| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-13 01:33:33 | Legacy | 400 | 287 | 200 | 300 | 2025-11-25 |
| 2026-09-12 23:31:36 | Legacy | 400 | 1228 | 200 | 1217 | 2025-11-25 |
| 2026-09-12 21:29:15 | Legacy | 400 | 448 | 200 | 478 | 2025-11-25 |
| 2026-09-12 19:27:29 | Legacy | 400 | 770 | 200 | 788 | 2025-11-25 |
| 2026-09-12 17:24:09 | Legacy | 400 | 1249 | 200 | 1170 | 2025-11-25 |
| 2026-09-12 15:21:42 | Legacy | 400 | 1583 | 200 | 1107 | 2025-11-25 |
Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
The two probe legs separately: modern server/discover and legacy initialize.
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