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Install in OpenClaw
/install denfly-skill
Description
Get current weather and forecasts (no API key required).
README (SKILL.md)
Weather
Two free services, no API keys needed.
wttr.in (primary)
Quick one-liner:
curl -s "wttr.in/London?format=3"
# Output: London: ⛅️ +8°C
Compact format:
curl -s "wttr.in/London?format=%l:+%c+%t+%h+%w"
# Output: London: ⛅️ +8°C 71% ↙5km/h
Full forecast:
curl -s "wttr.in/London?T"
Format codes: %c condition · %t temp · %h humidity · %w wind · %l location · %m moon
Tips:
- URL-encode spaces:
wttr.in/New+York - Airport codes:
wttr.in/JFK - Units:
?m(metric)?u(USCS) - Today only:
?1· Current only:?0 - PNG:
curl -s "wttr.in/Berlin.png" -o /tmp/weather.png
Open-Meteo (fallback, JSON)
Free, no key, good for programmatic use:
curl -s "https://api.open-meteo.com/v1/forecast?latitude=51.5&longitude=-0.12¤t_weather=true"
Find coordinates for a city, then query. Returns JSON with temp, windspeed, weathercode.
Usage Guidance
This skill is coherent and limited in scope: it simply runs curl against public weather endpoints (wttr.in and Open-Meteo). Before installing, confirm you are comfortable that queries and your IP address will be visible to those services (public endpoints typically log requests). Note the internal _meta.json ownerId/slug differ from the registry header — this looks like a packaging/metadata mismatch; if provenance matters to you, verify the publisher or prefer a skill whose metadata matches the registry. Also ensure curl is present on the host and be aware the example can write a PNG to /tmp (it won’t access your secrets or other files).
Capability Analysis
Type: OpenClaw Skill
Name: denfly-skill
Version: 1.0.0
The skill provides legitimate instructions for retrieving weather data from public APIs (wttr.in and open-meteo.com) using standard curl commands. No malicious code, data exfiltration, or prompt injection attempts were identified in SKILL.md or _meta.json.
Capability Assessment
Purpose & Capability
The name/description (weather, no API key) align with the runtime instructions (curl calls to wttr.in and api.open-meteo). Required runtime binary is only curl, which is appropriate. Minor inconsistency: registry metadata at the top lists ownerId and slug for 'denfly-skill', while _meta.json inside the package shows a different ownerId and slug 'weather' — this is a metadata mismatch (likely copy/paste or packaging oversight) but does not change the skill's functionality.
Instruction Scope
SKILL.md only instructs the agent to make HTTP GETs to wttr.in and api.open-meteo and optionally save a PNG to /tmp. It does not ask the agent to read local secrets, arbitrary filesystem paths, or other unrelated services. The PNG example writes to /tmp which is expected for a temporary file.
Install Mechanism
This is an instruction-only skill with no install spec and no code files. No downloads or package installs are performed by the skill itself — lowest-risk install posture.
Credentials
The skill declares no required environment variables, credentials, or config paths. That is appropriate for a read-only weather lookup service that uses public endpoints.
Persistence & Privilege
The skill does not request always:true and is user-invocable with normal autonomous invocation allowed. It does not modify other skills or system-wide settings. This level of persistence/privilege is typical and proportionate.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install denfly-skill - After installation, invoke the skill by name or use
/denfly-skill - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
- Initial release of the weather skill.
- Provides current weather and forecasts using wttr.in and Open-Meteo—no API key required.
- Supports simple curl commands for quick weather summaries and detailed forecasts.
- Includes tips for formatting, locations (city, airport code), and units.
- PNG weather images and programmatic JSON output supported.
Metadata
Frequently Asked Questions
What is Denfly Skill?
Get current weather and forecasts (no API key required). It is an AI Agent Skill for Claude Code / OpenClaw, with 215 downloads so far.
How do I install Denfly Skill?
Run "/install denfly-skill" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Denfly Skill free?
Yes, Denfly Skill is completely free, licensed under MIT-0. You can download, install and use it at no cost.
Which platforms does Denfly Skill support?
Denfly Skill is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Denfly Skill?
It is built and maintained by denfly618 (@denfly618); the current version is v1.0.0.
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