About Sigildex

Sigildex is a skill discovery and trust API for AI coding agents. It indexes SKILL.md files from public source repositories, ranks them by semantic relevance, publisher trust, community signals, and freshness, and serves machine-verdict safety analysis for the large majority of indexed skills. Agents use it over REST, MCP, or the CLI — no account required; usage beyond the free tier is paid per query via x402 (USDC on Base).

Contact

Sigildex is an independently operated service, currently in pre-launch.

• Security reports: security@sigildex.ai (see reporting a vulnerability below)
• Legal and general notices (including DMCA and privacy questions, pre-launch): security@sigildex.ai
• Documentation: sigildex.ai/docs

Reporting a vulnerability

Email security@sigildex.ai with a description of the issue, the affected endpoint or surface, and reproduction steps. Please do not open public issues for security reports. We aim to acknowledge reports within 72 hours. Machine-readable contact details live at /.well-known/security.txt (RFC 9116).

Machine-readable surfaces

• /llms.txt — agent-readable overview and API guide
• /openapi.json — OpenAPI specification
• /.well-known/x402.json — x402 payment descriptor
• /.well-known/agent-pricing.json — pricing manifest
• /.well-known/mcp.json — MCP server descriptor
• /health — liveness, version, and index freshness

Legal

• Terms of Service
• Privacy
• DMCA & content removal

The Sigildex software licensing is MIT. Formal legal-entity details will be published on this page before public launch.