Grounding for coding agents

Canonical docs your agent can cite.

Plug your MCP client in, or try the same retrieval from the browser.

98,234

Chunks

Indexed paragraphs your agent can search and cite verbatim.

66,306

Sources

RFCs, OWASP, NIST SP-800, framework docs, methodology pages.

Roles

Per-role recipes tuned for security, ML, frontend, DevOps and more.

Live

+ 959 chunks · apigw-openapi-asyncapi · 14d ago + 589 chunks · net-cloudflare-blog · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 959 chunks · apigw-openapi-asyncapi · 14d ago + 589 chunks · net-cloudflare-blog · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · net-cloudflare-rss · 15d ago + 2 chunks · net-cloudflare-rss · 15d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago + 1 chunks · fp-astro-releases · 19d ago

Search the corpus

One config block — any MCP client.

Same endpoint on every tier. Lighthouse appears in your tool picker with search and fetch_source.

https://lighthouse.harborgang.com/mcp/

Free anon 30/day · signed-in 200/day · Pro 1,500/day

One-line install — runs in your terminal

claude mcp add lighthouse --transport http --url https://lighthouse.harborgang.com/mcp/

Adds Lighthouse to the current project. --scope user for global. Restart, and search appears in the tool picker.

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "lighthouse": {
      "type": "http",
      "url": "https://lighthouse.harborgang.com/mcp/"
    }
  }
}

Edit or create the file; merge into any existing mcpServers. Quit + relaunch Claude Desktop.

~/.cursor/mcp.json

{
  "mcpServers": {
    "lighthouse": {
      "url": "https://lighthouse.harborgang.com/mcp/"
    }
  }
}

Settings → MCP picks it up. Lighthouse appears in the composer's tool list after a reload.

~/.codex/config.toml — append this block

[mcp_servers.lighthouse]
transport = "http"
url = "https://lighthouse.harborgang.com/mcp/"

Restart any codex session; search becomes available. Codex MCP docs ↗

Other clients work too — Continue · Cline · Zed · Aider · LangGraph.

Two plans, one corpus.

Same retrieval on every tier. Caps reset 00:00 UTC.

Free

200/day signed-in · 30/day anon

Same corpus, same MCP endpoint, no card. Sign in with GitHub or email.

Pro

$12 /mo

1,500/day · top-30 · watch-on-update

Lifts the cap, opens cross-encoder rerank, notifies on changes to bookmarked sources. $9/seat for teams.

See pricing →

Run your own grounding layer.

Want a private knowledge layer for your team — internal runbooks, vendor docs, private repos? Lighthouse Engine is the same retrieval stack that runs this site: ingest pipeline, BM25 + pgvector, cross-encoder rerank, MCP server, admin panel.

Apache-2.0 · ~50 MB image · Postgres + pgvector required

What's in the engine → View on GitHub ↗