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Daystruct MCP Server

by daystruct-api Your server? Claim it
answering

Daystruct is answering right now. Last checked 9 min ago. It exposes 21 tools.

Sourced software, security and AI evidence, plus scoped requests for specialist agent help.

Uptime history 13 days of history · worst day 93%
13 days agonow
95.6%
Uptime 24h
87 of 91 checks
21
Tools
read from the server
465 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 13

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 11 September 2026. No other catalogue keeps this.

22 Sep a tool description was rewritten discover_daystruct_capabilities
20 Sep a tool description was rewritten discover_daystruct_capabilities
20 Sep a tool changed the parameters it asks for discover_daystruct_capabilities
13 Sep 5 tools appeared close_task_session, create_task_session, get_task_session and 2 more
11 Sep 5 tools appeared get_daystruct_validated_guidance, list_daystruct_guidance_scopes, prepare_daystruct_capabilities and 2 more

Daystruct does not always answer

Over the last week it answered 98.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

run in your terminal
claude mcp add daystruct --transport http https://api.daystruct.ai/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "daystruct": {
      "url": "https://api.daystruct.ai/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.daystruct]
url = "https://api.daystruct.ai/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "daystruct": {
      "url": "https://api.daystruct.ai/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "daystruct": {
      "url": "https://api.daystruct.ai/mcp"
    }
  }
}

Available tools 21

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

daystruct
daystruct_status
Read the public Daystruct manifest and current capabilities.
get_daystruct_validated_guidance
Retrieve 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.
list_daystruct_guidance_scopes
Find task families and exact tested models with live Frontier guidance for a databank, before requesting that guidance.
search_daystruct_library
Search this account's saved or owned capabilities and bundles. Returns a small shortlist; saving does not acquire, execute or grant access to source. Inspect a selected profile before use.
resolve
resolve_daystruct_bundle
Read a saved, owned or public bundle with pinned source versions and current member availability. Returns a composition plan, not an execution or purchase. Each capability retains its usage terms.
resolve_task_capabilities
Select relevant capabilities progressively, or request full delivery. Optional task session remembers prior delivery and reported results; selection never executes or acquires a capability.
task
create_task_session
Start compact task context with optional capability steps and dependencies. Requires read and requests:write. No conversation or reasoning trace is stored.
get_task_session
Read compact task context or preview the next ready capabilities without consuming them or extending the session TTL.
answer
answer_software_questions
Resolve up to four package/API questions and an optional runtime compatibility check.
close
close_task_session
Close a task with its reported outcome and compact summary.
context
get_context_contract
Read a databank's identity, temporal, dimension, and context-packet contract.
discover
discover_daystruct_capabilities
Find available Daystruct capabilities using a task sentence or tool name. Query searches return up to eight ranked compact descriptors, matched terms, requirements, limitations, prices and profile links; meta.matched and fullResults expose truncation. Inspect a selected capability by reference for its full contract before requesting help. Provider availability is not proof a task will succeed. Licensing filters narrow the list to source packages whose licensing evidence matches; entries with no licensing evidence are excluded rather than assumed to pass, and a filtered list returns summary licensing only. Read a capability's profile for its full receipt. Licensing findings are evidence against a configured policy, not legal advice.
entities
search_entities
Search normalized entities by databank, type, provider, or capability.
entity
get_entity_evidence
Read canonical facts, aliases, history, and provenance for an entity.
lookup
lookup_vulnerability
Given 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 nothing for it; no other Daystruct tool will have it either. Exploitation status is never reported false from a partial catalog.
prepare
prepare_daystruct_capabilities
Group up to six discovered capability IDs into a plan with each profile and delivery instructions. Missing entries remain explicit. Does not acquire, execute, check combined compatibility or charge credits. Your agent can combine these pieces with Daystruct knowledge and verify the resulting task.
recent
read_recent_evidence_changes
Read the bounded canonical change feed.
record
record_task_event
Report viewed, called, succeeded, failed or skipped capability status, or task stage. Usage and outcomes remain client-reported.
release
check_release_support
Given 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.
security
check_security_exposure
Given 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.
select
select_model
Given 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.

Endpoints

URLTransportStateLatencyChecked
https://api.daystruct.ai/mcp streamable-http answering 377 ms 9 min ago

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Daystruct — questions

Answers built from our own checks of this server.

What can Daystruct do?
It exposes 21 tools, read directly from the server on our last check. Among them: answer_software_questions, check_release_support, check_security_exposure, close_task_session, create_task_session, daystruct_status and 15 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
What is Daystruct mostly used for?
Its tools cluster around daystruct, resolve and task. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Daystruct working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 87 of 91 checks got a reply (95.6%), average response time 465 ms. The bar chart above shows every period we have measured.
How do I connect Daystruct?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Daystruct need an API key?
No. Daystruct completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 21 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Daystruct?
It answers our handshake in 465 ms on average, which is faster than 33% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.