A specialized search engine designed for AI agents to discover, evaluate, and integrate free and paid tools, APIs, and MCP servers.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install addtools
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 addtools 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 add.tools?
add.tools functions as a high-performance discovery layer for autonomous agents and developers building Openclaw Skills. It indexes a vast array of tools and API endpoints, providing agents with the metadata they need to understand tool capabilities, pricing structures, and reliability scores in real-time.
By supporting both free resources and paid x402-enabled endpoints, it allows agents to navigate the economy of web services autonomously. This skill is vital for developers who want their agents to move beyond static configurations and dynamically find the best tool for any given task within the Openclaw Skills framework.
add.tools Use Cases
- Enabling AI agents to find specialized APIs like email delivery or weather forecasting on the fly.
- Discovering and connecting to Model Context Protocol (MCP) servers to extend agent knowledge.
- Automating the selection of paid versus free tools based on task priority and budget.
- Improving agent reliability by selecting tools with high success-rate metadata.
How add.tools Works
- The AI agent sends a search query to the discovery endpoint describing the functionality it requires.
- The service performs a lookup across its indexed tools and MCP servers.
- Results are returned with structured metadata, including endpoint URLs and x402 payment requirements.
- The agent parses the response to select the most appropriate tool for its current workflow.
- Optionally, the agent reports feedback to the system to refine future search relevance for the Openclaw Skills community.
add.tools Setup
To integrate this search capability into your agent's workflow, you can use standard HTTP requests. No complex SDK is required for basic discovery.
# Search for a specific tool capability
curl -H "Accept: application/json" "https://add.tools/search?q=send+email"
# Or use the explicit format parameter
curl "https://add.tools/search?q=weather+forecast&format=json"
add.tools Data Schema & Taxonomy
The system utilizes a structured response format to ensure agents can easily parse tool capabilities.
| Attribute | Description |
|---|---|
| name | The display name of the discovered tool or API. |
| description | A detailed summary of what the tool does for the agent. |
| pricing | Indicates if the tool is free or requires x402 micropayments. |
| reliability | A score based on uptime and successful agent executions. |
| endpoint | The direct URL or MCP connection string for the tool. |
add.tools Advanced Features
- Smart Content Negotiation: Automatically serves JSON to agents and HTML to humans from the same URL structure.
- x402 Integration: Native support for micropayments, allowing Openclaw Skills to handle paid API access without manual intervention.
- Feedback API: A dedicated endpoint for agents to report success or failure, creating a self-improving ecosystem for tool discovery.
- Multi-format Support: LLM-friendly server-rendered content that can be parsed even without structured JSON headers.
SKILL.md
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