A set of instructions for answering time and timezone questions with live data from a public clock service. It covers city lookup, time conversion, coordinates, and daylight-saving changes.

Finding the time in one or more places, converting UTC or local times, planning calls across time zones, and checking when clocks change.

It helps an agent handle changing timezone rules and difficult date-and-time calculations accurately instead of guessing from memory.

world-clock — Skill for Claude Code by worldclockpro/worldclock-mcp

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add worldclockpro/worldclock-mcp --skill world-clock

Clone the repo

git clone --depth 1 https://github.com/worldclockpro/worldclock-mcp

Made for: Claude Code.

Or install world-clock, the plugin that ships this one along with the rest of its 1 skill, 2 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/worldclockpro/worldclock-mcp/world-clock/github.svg)](https://agentmods.dev/skills/worldclockpro/worldclock-mcp/world-clock)

Your own site

<a href="https://agentmods.dev/skills/worldclockpro/worldclock-mcp/world-clock"><img src="https://agentmods.dev/badge/skills/worldclockpro/worldclock-mcp/world-clock/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/worldclockpro/worldclock-mcp/world-clock"><img src="https://agentmods.dev/badge/skills/worldclockpro/worldclock-mcp/world-clock.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 104 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,063 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00104	$0.01063
Opus 5.5	$0.00042	$0.00425
Sonnet 5.5	$0.00021	$0.00213
Haiku 4.5	$0.00010	$0.00106

Measured 2mo ago against content hash 8fabae3cd49a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

world-clock scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

install: "MCP endpoint: https://worldclock.pro/mcp (Streamable HTTP, no auth). No MCP client? The skill includes a curl fallback."

skills/world-clock/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

World Clock

Live time facts from worldclock.pro. Never answer timezone questions from memory: DST rules change, offsets are political, and wall-time math has edge cases. The server is public, read-only, and needs no key: https://worldclock.pro/mcp

Pick the right tool

Question shape	Tool
What time is it in X (one or many places, up to 50)	get_current_time
It is 9am in A, what time in B, C, D	convert_time with from.dateTime + from.location
Express this UTC instant in local times	convert_time with utc
Time or timezone at lat/lon	time_by_coordinates
Does X observe DST, when do clocks change	get_dst_transitions (optional year)
Which city is this, what is its timezone or slug	search_cities

How to phrase locations

Every location is exactly ONE of:

query: city name, slug, or alias ("Tokyo", "new-york", "nyc", "Москва", "São Paulo")
timezone: IANA id ("America/New_York") or abbreviation ("PST", "ET", "UTC")
latitude + longitude (both required)

Passing two forms at once is an error. For convert_time, pass exactly one of utc or from. Bare datetimes with no zone designator are read as UTC. from.dateTime must look like "2026-06-29T09:00" (local wall time, no zone).

Gotchas the tools handle for you (do not second-guess)

DST boundaries: always convert on the actual date, not with today's offset. A 9am New York call is a different UTC instant in January and July.
"EST" is a FIXED offset (UTC-5 year round). "ET" means real New York wall time and follows DST. Prefer "ET" or the IANA id unless the user really means the fixed offset. Same for CST/CT, MST/MT, PST/PT.
Half and quarter offsets are real: India +5:30, Nepal +5:45, Eucla +8:45. Never round offsets to whole hours.
Ambiguous city names (San Jose, Hyderabad, Portland): call search_cities first, confirm the country, then pass the returned slug as query.
Date line: conversions can change the weekday. Report the weekday field from the response, do not infer it.
Fixed abbreviations report isDST false and no transitions by design.

Read the full file on GitHub · 85 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 85 lines · 104 tokens per session scan A 8fabae3cd49a

Subscribe to this mod's changes

world-clock is a skill published in the GitHub repository worldclockpro/worldclock-mcp (0 stars, last pushed 3mo ago), licensed MIT. It adds 104 tokens to every session and 1,063 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

agent-skills claude-plugin dst mcp mcp-server model-context-protocol

world-clock next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
world-clockworldclockpro/worldclock-mcp	Skill	0	3mo ago	MIT	A	104	Claude Code
mission-lifecycleAURORA-NEURO/aurora-agent	Skill	1	10d ago	Apache-2.0	A	70	Claude Code
aurora-setupAURORA-NEURO/aurora-agent	Skill	1	10d ago	Apache-2.0	A	79	Claude Code
aurora-backend-setupAURORA-NEURO/aurora-agent	Skill	1	10d ago	Apache-2.0	A	82	Claude Code
windows-test-truthAURORA-NEURO/aurora-agent	Skill	1	10d ago	Apache-2.0	A	77	Claude Code
halopsaServosity/msp-skills	Skill	70	today	none	A	104	Claude Code
veeamServosity/msp-skills	Skill	70	today	none	A	136	Claude Code

world-clock