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Directory / Daystruct

Daystruct

by api.daystruct.ai · https://api.daystruct.ai/mcp

Discover reusable source, data and memory capabilities; inspect release evidence and compatibility.

26 tools✓ no account neededPricing: on their site

See pricing →Visit website

84 /100

PASS · WITH NOTES

12 of 12 checks · 3 Nov 2026

Is Daystruct MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
Its error messages showed no secrets or internal details.
22 of its 26 tools are labeled read-only; the others may change or send things.
Overall it scored 84/100 on 3 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What it can do

26 tools, in the server's own words.

daystruct_statusread-only

Read the public Daystruct manifest: how capabilities are discovered, checked for compatibility and delivered.

search_entitiesread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

get_entity_evidenceread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

get_context_contractread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

answer_software_questionsread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

check_security_exposureread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

lookup_vulnerabilityread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

check_release_supportread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

select_modelread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

read_recent_evidence_changesread-only

Deprecated: this evidence tool is no longer refreshed and will be removed on or after 2026-12-31.

compat_checkread-only

Resolve Daystruct capabilities to exact versions that fit each other, or get the exact constraint that broke with suggested alternatives.

get_compat_verify_kitread-only

Return the files of the local verify step for exact source members from compat_check: a script, its plan, and the interface conformance suites.

get_daystruct_validated_guidanceread-only

Retrieve reviewed Frontier guidance scoped to an exact databank, task family and tested model.

list_daystruct_guidance_scopesread-only

Find task families and exact tested models with live Frontier guidance for a databank, before requesting that guidance.

plan_project_developmentread-only

Get a small stage-specific capability selection and concrete next actions from a caller-approved project projection.

get_daystruct_accountread-only

Read the connected key's account: available and reserved credits, the key's scopes, its per-call spending limit (null means none) and where the owner adds cred…

resolve_task_capabilities

Select relevant capabilities progressively, or request full delivery.

create_task_session

Start compact task context with optional capability steps and dependencies.

record_task_event

Report viewed, called, succeeded, failed or skipped capability status, or task stage.

get_task_sessionread-only

Read compact task context or preview the next ready capabilities without consuming them or extending the session TTL.

close_task_session

Close a task with its reported outcome and compact summary.

search_daystruct_libraryread-only

Search this account's saved or owned capabilities and bundles.

resolve_daystruct_bundleread-only

Read a saved, owned or public bundle with pinned source versions and current member availability.

discover_daystruct_capabilitiesread-only

Browse every public Daystruct capability without an account, or search using a task sentence or tool name.

and 2 more

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Every tool is described
24 warnings
- !search_entities: Inputs with no description: databank, type, provider, capability, modelType, minContextWindow, lane, limit
- !get_entity_evidence: Inputs with no description: entityId
- !get_context_contract: Inputs with no description: databank
- !answer_software_questions: Inputs with no description: claims, compatibility
- !check_security_exposure: Inputs with no description: package, version, ecosystem
- !lookup_vulnerability: Inputs with no description: cve
- !check_release_support: Inputs with no description: product, version
- !select_model: Inputs with no description: minContextWindow, capabilities, maxInputPricePerMillionTokens, maxOutputPricePerMillionTokens, provider, limit
- and 16 more
note
!
Tools work with good inputs
1 warning
- !daystruct_status: Answered with about 158 KB of text. Many AI apps cut off tool answers this big, so the AI may never see the end of it.
- –resolve_task_capabilities: Not run: labeled as changing data
- –create_task_session: Not run: labeled as changing data
- –record_task_event: Not run: labeled as changing data
- –close_task_session: Not run: labeled as changing data
- and 21 more
note
✓
ConnectsConnected in 361 ms
pass
✓
Lists its toolsFound 26 tools
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Bad inputs give a clean error
All good
- ✓search_entities: Refused wrong type for "databank" with a clear error
- ✓get_entity_evidence: Refused missing required input "entityId" with a clear error
- ✓get_entity_evidence: Refused wrong type for "entityId" with a clear error
- ✓get_context_contract: Refused missing required input "databank" with a clear error
- ✓get_context_contract: Refused wrong type for "databank" with a clear error
- ✓answer_software_questions: Refused missing required input "claims" with a clear error
- ✓answer_software_questions: Refused wrong type for "claims" with a clear error
- ✓check_security_exposure: Refused missing required input "package" with a clear error
- and 27 more
pass
✓
Tools work together
3 chains working
- ✓daystruct_status → get_entity_evidence: get_entity_evidence found what daystruct_status returned (entityId = "cd2eb7ed-e2ea-4251-bbb2-a208b9e8290a")
- ✓search_entities → get_entity_evidence: get_entity_evidence found what search_entities returned (entityId = "2d18562c-740c-43d1-bd51-65e2b494f0be")
- ✓read_recent_evidence_changes → get_entity_evidence: get_entity_evidence found what read_recent_evidence_changes returned (entityId = "19e8b79c-74cf-4d68-bfa1-cc4cd6ee2ff2")
- ✓Stopped looking for more chains after the limit on tool calls
pass
✓
Fast enough
All good
- ✓Connecting took 361 ms
- ✓Listing tools took 83 ms
- ✓Average tool answer: 134 ms
- ✓get_daystruct_card_image: Slowest tool: get_daystruct_card_image (886 ms)
pass
✓
No secrets leakedChecked 69 error messages: no secrets or internal details
pass
✓
Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
pass

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://api.daystruct.ai/mcp

Show this score on GitHub

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Score over time

3 Nov 202684

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Daystruct, signed in with GitHub, one per person. Reviews never change the score.

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