# StealthStack

> StealthStack is an honest, indexed search of the agentic web: it crawls Agentic Resource Discovery (ARD) catalogs and indexes the skills, MCP servers, A2A agents and catalogs they publish, with real crawl provenance and structural (not cryptographic) trust signals. Agents can query it over MCP or a JSON registry API; humans use the portal.

Everything below is public, read-only and needs no API key. Machine endpoints and the human portal both live on the identity domain `stealthstack.ai`.

## ARD catalog

- [ARD catalog (ard.json)](https://stealthstack.ai/.well-known/ard.json): StealthStack's own ARD v0.91 manifest: the hosted file-conversion skills, their runner MCP twins, the discovery MCP server and the registry. Also advertised via `Link: rel="ard"` and the robots.txt `Agentmap:` line.
- [Legacy alias (ai-catalog.json)](https://stealthstack.ai/.well-known/ai-catalog.json): byte-identical copy at the predecessor path.
- [Catalog as text (llms-full.txt)](https://stealthstack.ai/llms-full.txt): every catalog entry as name, one-line description and URL.

## MCP server

- [Discovery MCP server](https://stealthstack.ai/mcp): Streamable HTTP (JSON-RPC over `POST https://stealthstack.ai/mcp`). Tools: `search_resources` (ranked search of the crawled index), `list_resources` (filtered listing), `get_resource` (one record by URN). Install: `claude mcp add --transport http stealthstack https://stealthstack.ai/mcp`
- [MCP server card](https://stealthstack.ai/mcp/server-card.json): generated from the tool registry.

## Registry API

- [Search](https://stealthstack.ai/registry/search): `POST` an ARD v0.91 query (`{"query": {"text": "convert avro to csv"}, "pageSize": 10}`); returns relevance-ranked results.
- [Explore](https://stealthstack.ai/registry/explore): `POST` an ARD explore request (`{"query": {...}, "resultType": {"facets": [...]}}`) for facet counts over the index.
- [Resources](https://stealthstack.ai/registry/resources): `GET` paginated records (`?q=&kind=&trust=&page=&pageSize=`, pageSize at most 100); `GET /registry/resources/{urn}` for one record.

## Skills

- [Skills index](https://stealthstack.ai/.well-known/ard.json): the catalog entries typed `text/markdown; profile="urn:air:agent-skills"` are the hosted skills; each is a `SKILL.md` under `https://stealthstack.ai/skills/<slug>/`.
- [Example: Avro Reader & Converter](https://stealthstack.ai/skills/avro/SKILL.md): a typical skill file with bundled references and scripts.

## Portal

- [StealthStack portal](https://stealthstack.ai/): human search over the crawled index.
- [Registry](https://stealthstack.ai/search): browse by type, business category and trust.
- [ARD conformance checker](https://stealthstack.ai/conformance): check any domain's `/.well-known/ard.json` against ARD v0.91; publisher scoreboard.
- [Status](https://stealthstack.ai/status): uptime for the registry API, search, MCP server and crawler.
- [How trust works](https://stealthstack.ai/trust): what the trust badges mean.
- [Docs](https://stealthstack.ai/docs): connect Claude, Claude Code or any MCP client to the MCP server; tools, example prompts and API pointers.
- [Privacy](https://stealthstack.ai/privacy): what we collect, why, how long we keep it, and which third parties see it.
- [Terms](https://stealthstack.ai/terms): terms of use for the index, API and MCP server.

## Trust model

- [Trust model](https://stealthstack.ai/trust): "Domain-anchored" only means a resource's URN authority matches the host that published its catalog; it is a structural check, not proof of ownership or safety.