# Sigildex

> Agent-first skill discovery API. Search 78K+ agent skills across GitHub
> and ClawHub. Ranked by relevance, trust, and freshness. Pay per query
> via x402 (USDC on Base) or use free tier (5 queries/day).

## API

- POST /discover — search for skills by natural language query
- POST /inspect — get full details and SKILL.md content for a specific skill
- GET /health — service health check

## MCP Server

- URL: https://sigildex.ai/mcp
- Transport: streamable-http (stateless)
- Tools: discover_skills, inspect_skill

## Payment

- Protocol: x402 (USDC on Base)
- Price: $0.002 per query
- Free tier: 5 queries/day per IP, no auth needed
- Payment header: payment-signature

## Quick Start

### REST API
```
curl -X POST https://sigildex.ai/discover \
  -H "Content-Type: application/json" \
  -d '{"query": "PDF text extraction", "limit": 5}'
```

### MCP (Claude Code)
Add to your MCP config:
```json
{
  "mcpServers": {
    "sigildex": {
      "url": "https://sigildex.ai/mcp"
    }
  }
}
```

## Links

- OpenAPI spec: https://sigildex.ai/openapi.json
- x402 payment info: https://sigildex.ai/.well-known/x402.json
- MCP discovery: https://sigildex.ai/.well-known/mcp.json
- GitHub: https://github.com/sigildex/sigildex