Is macOS Calendar and Reminders safe to use?

macOS Calendar and Reminders has an HVTrust score of 56.3/100 (Grade C), ranked #739 of 1325 tracked AI agent projects. This score reflects verifiable supply-chain integrity, transparency, maintenance, and adoption signals.

What is the trust score for macOS Calendar and Reminders?

macOS Calendar and Reminders scores 56.3/100 on HVTracker's evidence-weighted HVTrust scale. It has 36 GitHub stars and is categorized under MCP Servers.

macOS Calendar and Reminders

PsychQuant/che-ical-mcp

macOS Calendar & Reminders MCP server (29 tools) — native Swift EventKit for Claude Desktop & Code. Events + reminders CRUD, recurring, batch ops, conflict & duplicate detection, per-event timezone, undo/redo, #tags, --cli mode, SwiftUI --setup TCC flow, --self-update. Developer-ID signed +…

MCP Servers Swift Listed MIT

Is macOS Calendar and Reminders safe? Promising trust profile, but some evidence still deserves review.

OSSF Scorecard 5.2 / 10

Provenance None

Signed commits 26%

Last push 2d ago

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In detail: macOS Calendar and Reminders scores 56.3/100 (Grade C), ranked #739 of 1325 tracked open-source AI agent projects, on evidence coverage C (2 of 5 independent signal types). The public evidence: no package-provenance attestation found; OSSF Scorecard rates its supply-chain practices 5.2/10; 26% of recent commits are signed; last pushed 2026-09-24. Every point is earned from checkable signals — never paid placement. How scoring works →

How macOS Calendar and Reminders compares in MCP Servers

#407 Cross Code Organizer 56.3 ±0
#408 MCP Arr 56.3 ±0
#409 macOS Calendar and Reminders 56.3 this agent
#410 Kernel MCP Server 56.3 ±0
#411 State Memory MCP 56.3 ±0

Bars show each HVTrust score; the tick marks macOS Calendar and Reminders’s 56.3.

Where the 56.3 comes from

HVTrust dimensions vs the MCP Servers average

56.3 / 100 · 100.0% confidence

macOS Calendar and Reminders MCP Servers average (775 agents)

Safety / Integrity50% OSSF Scorecard · 30% provenance · 20% signed commits

7.8 / 25

2.5 below avg 10.3

Identity / Provenance60% listing status · 40% build provenance

10.8 / 18

2.6 below avg 13.4

Transparency50% declared license · 50% OSSF Scorecard

12.9 / 17

0.7 above avg 12.2

Maintenance60% last-push freshness · 40% commit activity

19.3 / 20

7.3 above avg 12.0

AdoptionLog-scaled stars · package downloads

3.8 / 20

3.4 below avg 7.2

Quick Trust Read

What Would Improve It

Publish package provenance or release attestations for stronger supply-chain evidence.

Recent Changes

2026-09-23

Tool Surface Changed

Detected tool/plugin surface changed: none → declared

2026-09-23

Provider Added

Runtime surface grew — new detected provider dependency: Anthropic

2026-09-23

Mcp Status Changed

Detected MCP server support changed: none → implemented

Maintainer Checklist

Raise Scorecard signals Current OSSF Scorecard is 5.2/10. Tighten the weakest checks to improve public safety evidence.

Publish provenance Add package provenance or release attestations so users can verify where shipped artifacts came from.

Increase signed commits Raise the share of verified-signed commits to make maintainer identity and release history easier to trust.

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61.7

Activity sub-score · out of 100

#409

In MCP Servers

How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption. Grade C reflects the trust score band: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Evidence coverage C is separate — it grades how many independent signal types back the score (2 of 5), so a high score on thin evidence stays visible. Full methodology →

Rank Trend

2026-08-11 2026-09-26

Activity & Reach

Stars

Forks

Last Push

2026-09-24

2 days ago

Commits (4 wk)

Downloads (7d)

—

HN mentions (30d)

—

Open Issues

Rank Change

▼2

was #737

Analysis

Activity Inputs

61.7 / 100

StarsRepository reach

9.4 / 30

FreshnessLast push recency

24.7 / 25

ActivityRecent commits

23.2 / 25

CommunityFork signal

4.4 / 20

Supply Chain Trust

Package Provenance

None

No package attestations found

OSSF Scorecard

5.2 / 10

OpenSSF Scorecard · scanned Sep 20, 2026

Signed Commits

26%

of last 100 commits verified

Binary-Artifacts 10

Branch-Protection 3

CI-Tests 7

CII-Best-Practices 0

Code-Review 0

Contributors 6

Dangerous-Workflow 10

Dependency-Update-Tool 10

Fuzzing 0

License 10

Maintained 10

Packaging -1

Pinned-Dependencies 0

SAST 7

Security-Policy 0

Signed-Releases 0

Token-Permissions 0

Vulnerabilities 10

Common questions about macOS Calendar and Reminders

macOS Calendar and Reminders has a mixed signal profile. Some trust indicators are present, others are missing. Whether it is safe for your use case depends on which gaps matter to you — review the breakdown below before adopting in production.

Does macOS Calendar and Reminders publish package provenance?

No published build provenance is currently detected for macOS Calendar and Reminders. This is common for open-source projects but means consumers cannot independently verify that the package on the registry matches the GitHub source.

Does macOS Calendar and Reminders have an OpenSSF Scorecard?

macOS Calendar and Reminders has an OpenSSF Scorecard score of 5.2/10. The Scorecard checks for branch protection, signed releases, dependency updates, fuzzing, code review, and other supply-chain hygiene items. See the full check breakdown on this page.

Is macOS Calendar and Reminders actively maintained?

Actively maintained. The repository was pushed to within the last 2 day(s).

What license does macOS Calendar and Reminders use?

macOS Calendar and Reminders ships under MIT. A declared, OSI-approved license is one of the transparency signals HVTrust scores.

Are macOS Calendar and Reminders's commits signed?

26% of the last 100 commits to macOS Calendar and Reminders are verified-signed (GPG, SSH, S/MIME, or GitHub's signing flow). Signed commits help confirm that code was authored by who the commit claims.

Not a safety endorsement. HVTracker describes what public signals show, not whether a project is safe for your use case. Run your own security review before adopting in production.

AI agent surface

MCP, providers, tool surface

Scored in HVTrust

These runtime-trust fields — detected from public repo docs and manifests — contribute a bounded adjustment to this project's HVTrust score alongside supply-chain evidence. The exact values each field can add or subtract are documented in the methodology → Compare this surface across every listed agent in the capability matrix →

MCP Server Support

medium confidence

Implemented

macOS Calendar and Reminders appears to expose MCP server capabilities.

Detailed evidence is not shown in the public view.

External Service Dependencies

medium confidence

1 detected

Public provider/service dependencies detected.

Anthropic

Credential signal: No explicit API-key/config marker detected.

Tool / Plugin Surface

high confidence

Declared

Declared plugin/integration surface detected.

Detailed evidence is not shown in the public view.

Package Provenance Drift

N/A

No package source configured

Detailed evidence is not shown in the public view.

MCP signal live
External deps live
Tool / plugin surface live
Package provenance drift live

How this surface has changed

Detected changes to macOS Calendar and Reminders's runtime surface and supply-chain posture, from daily public-signal snapshots. A change here means our detectors see something different — a genuinely changed capability, or better evidence of an existing one.

2026-09-23

Tool Surface Changed

Detected tool/plugin surface changed: none → declared

2026-09-23

Provider Added

Runtime surface grew — new detected provider dependency: Anthropic

2026-09-23

Mcp Status Changed

Detected MCP server support changed: none → implemented

Maintain macOS Calendar and Reminders?

For maintainers

HVTrust scores macOS Calendar and Reminders from public signals only — we never contact maintainers first. If a signal is wrong, stale, or missing (provenance you publish, a Scorecard you run, signed releases), tell us and we'll review it. Corrections are public and tracked on GitHub.

Submit a correction → Add the trust badge

Reputation Timeline

Signal history

2026-09-23

Tool Surface Changed

Detected tool/plugin surface changed: none → declared

2026-09-23

Provider Added

Runtime surface grew — new detected provider dependency: Anthropic

2026-09-23

Mcp Status Changed

Detected MCP server support changed: none → implemented

2026-09-23

Grade Changed

Trust grade D → C

2026-09-23

Rank Moved

Rank dropped 271 spots (#459 → #730)

2026-09-23

HVTrust Changed

HVTrust up 12.5pts (43.9 → 56.4)

2026-09-22

Newly Listed

First tracked at rank #459

2026-09-21

Removed From Active Tracking

Removed from active tracking

2026-09-18

Rank Moved

Rank dropped 10 spots (#748 → #758)

2026-09-15

Rank Moved

Rank dropped 11 spots (#738 → #749)

2026-09-09

Rank Moved

Rank dropped 25 spots (#690 → #715)

2026-09-08

Rank Moved

Rank rose 35 spots (#725 → #690)

2026-09-08

Activity Score Changed

Activity score up 6pts (56 → 62)

2026-09-07

Rank Moved

Rank dropped 16 spots (#709 → #725)

2026-09-05

Rank Moved

Rank dropped 67 spots (#636 → #703)

2026-09-04

Rank Moved

Rank dropped 21 spots (#615 → #636)

2026-09-03

Scorecard Added

OSSF Scorecard: 5.4/10

2026-09-03

Grade Changed

Trust grade D → C

2026-09-03

Rank Moved

Rank rose 632 spots (#1247 → #615)

2026-09-03

HVTrust Changed

HVTrust up 32.1pts (22.4 → 54.5)

2026-09-02

Rank Moved

Rank dropped 33 spots (#1214 → #1247)

2026-09-01

Rank Moved

Rank dropped 30 spots (#1184 → #1214)

2026-08-31

Rank Moved

Rank rose 62 spots (#1246 → #1184)

2026-08-31

HVTrust Changed

HVTrust up 3.9pts (18.6 → 22.5)

2026-08-31

Activity Score Changed

Activity score up 21pts (32 → 53)

2026-08-30

Rank Moved

Rank dropped 13 spots (#1233 → #1246)

2026-08-29

Rank Moved

Rank dropped 17 spots (#1216 → #1233)

2026-08-28

Rank Moved

Rank dropped 16 spots (#1200 → #1216)

2026-08-27

Rank Moved

Rank dropped 13 spots (#1187 → #1200)

2026-08-26

Rank Moved

Rank dropped 44 spots (#1143 → #1187)

2026-08-16

Rank Moved

Rank dropped 26 spots (#1107 → #1133)

2026-08-10

Rank Moved

Rank dropped 68 spots (#1040 → #1108)

2026-08-09

Activity Score Changed

Activity score down 11pts (45 → 34)

2026-08-08

Newly Listed

First tracked at rank #958

GitHub →

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Other agents in MCP Servers

Data sources
GitHub REST API (repo, commits, stars, forks, license) · OpenSSF Scorecard CLI
Each agent's signals refresh once daily across 6 staggered batches. Methodology v4.3 · Raw JSON