A curated toolkit of high-value, free public APIs designed to provide AI agents with real-world data without the need for paid API keys.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install api-bridge
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install api-bridge using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is API Bridge?
API Bridge is a documentation-first skill designed to empower autonomous agents with immediate access to real-world data. By providing a verified collection of stable, mostly key-free APIs, it eliminates the friction of managing multiple paid subscriptions for basic data needs like weather, geocoding, and currency exchange.
This specific entry in the Openclaw Skills ecosystem acts as a bridge between LLM reasoning and live web data. It focuses on high-uptime services with clear schema examples, allowing agents to ingest the SKILL.md file and immediately understand how to construct curl commands for various use cases.
API Bridge Use Cases
- Fetching live weather forecasts and atmospheric conditions for specific coordinates or cities.
- Performing forward and reverse geocoding to translate addresses into latitude and longitude.
- Retrieving real-time foreign exchange rates and cryptocurrency market data for financial analysis.
- Generating mock data and realistic user profiles for UI testing and prototyping.
- Enriching agent responses with factual summaries and thumbnails sourced directly from Wikipedia.
How API Bridge Works
- The AI agent parses the API Bridge documentation within the Openclaw Skills directory to identify available endpoints.
- The agent selects the appropriate API based on the user's data requirement (e.g., wttr.in for weather).
- Using the provided curl examples and parameter schemas, the agent constructs an HTTP request.
- The agent executes the request and receives a structured JSON payload.
- The data is processed and integrated into the agent's current task or response context.
API Bridge Setup
To integrate this toolkit into your workspace, add the directory to your skills path:
# Navigate to your OpenClaw workspace
cd your-workspace-folder
# Create the skill directory
mkdir -p skills/api-bridge
# Save the SKILL.md content into the directory
touch skills/api-bridge/SKILL.md
Since this is a documentation-first skill, no additional binary installation is required; your agent will automatically reference the MD file for API protocols.
API Bridge Data Schema & Taxonomy
API Bridge organizes data access across several key domains, providing consistent JSON outputs for agent consumption:
| Category | Primary Provider | Typical Output Shape |
|---|---|---|
| Weather | Open-Meteo / wttr.in | Current conditions, hourly/daily forecasts, units. |
| Geocoding | Nominatim / ipapi | Lat/Lon, city, region, country, and parsed address components. |
| Finance | Open-ER / CoinGecko | Currency rates (USD base), crypto prices, and market cap data. |
| Metadata | icon.horse / urlmeta | Favicon URLs, Open Graph tags, and site descriptions. |
| Testing | JSONPlaceholder | Arrays of posts, comments, users, and todos for mocking. |
API Bridge Advanced Features
- Multi-agent data sharing: Standardized API patterns allow different agents in a swarm to use the same data sources consistently.
- Zero-Config Auth: Prioritizes APIs that require no keys or use simple demo keys for immediate deployment.
- Rate-Limit Awareness: Includes specific headers and User-Agent requirements for strict providers like Nominatim to ensure high success rates.
- CORS status tracking: Identifies which APIs are safe for browser-based agent tools versus server-side CLI agents.
SKILL.md
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