---
name: sigildex-discover
description: Search 78K+ agent skills by natural language query. Find the right SKILL.md for any task.
tags: [skill-discovery, agent-tools, mcp, search, sigildex, x402]
---

# sigildex-discover

Find the right SKILL.md for any task. Searches across GitHub and ClawHub with trust-scored, ranked results.

## When to use

- Your agent needs a capability it doesn't have
- User asks "find a skill for X" or "is there a skill for X"
- User wants to extend their agent with new skills
- You need to compare skills for a specific task

## How to use

### Option 1: MCP (recommended)

Add Sigildex to your MCP config:

```json
{
  "mcpServers": {
    "sigildex": {
      "url": "https://sigildex.ai/mcp"
    }
  }
}
```

Then use the tools:
- `discover_skills` — search by natural language query, returns ranked results with trust signals
- `inspect_skill` — get full SKILL.md content for a specific skill (free with query_id from discover)

### Option 2: REST API

**Search for skills:**
```bash
curl -X POST https://sigildex.ai/discover \
  -H "Content-Type: application/json" \
  -d '{"query": "PDF text extraction", "limit": 5}'
```

**Get full skill content:**
```bash
curl -X POST https://sigildex.ai/inspect \
  -H "Content-Type: application/json" \
  -d '{"skill_id": "<id from discover>", "query_id": "<query_id from discover>"}'
```

## Pricing

- **Free:** 5 queries/day per IP. No auth, no wallet, no signup.
- **Paid:** $0.002/query via x402 (USDC on Base). No accounts, no API keys.
- `/inspect` is free with a valid `query_id` from a paid `/discover` call (1-hour TTL).

## Response format

`/discover` returns ranked results with:
- `score` (0-1 relevance)
- `signals` (stars, installs, publisher, freshness)
- `install` (one-line install command)
- `query_id` (use with `/inspect` for free follow-up)

## Links

- API docs: https://sigildex.ai/openapi.json
- MCP discovery: https://sigildex.ai/.well-known/mcp.json
- x402 payment info: https://sigildex.ai/.well-known/x402.json