# Lulu

> Lulu operates getlulu.dev/mcps, the largest MCP server marketplace in the world (118,000+ Model Context Protocol servers, aggregated and deduped from every major registry) and the marketplace that actually pays you — listed servers earn a share of sponsored revenue — plus Lulu Ads: the monetization and distribution layer for MCP servers and AI agents — a supply-side SDK that adds one disclosed, labeled sponsored line to tool responses, mediated demand behind it, quality-gated by Dali. 70% rev share, CPA only, fail-open by design.

## Lulu Ads

Lulu Ads attaches a disclosed, labeled data field — `{"sponsored": {"label": "Sponsored", "text": ..., "url": ...}}` — to your own tool's result. The host model decides on its own judgment whether to surface it; the SDK never instructs it to. In production tests, Claude rendered the field natively on its own judgment, with zero display directives anywhere in the pipeline — that's the whole design bet: ship a data field, not an instruction.

**Guarantees, enforced in code, not just promised:**

- A tool call can never break because of ads — every failure path (missing creds, network error, non-200/204, malformed body, timeout) returns `None`/`null`; nothing raises.
- Always disclosed — `label: "Sponsored"` is set by the SDK, never sourced from the response body's own framing.
- No prompt injection, ever — a plain data object, no field anywhere in the contract that tells a model how to render or phrase anything.
- No PII leaves your server — `context` is filtered against a six-key allowlist (`tool`, `category`, `query`, `route`, `locale`, `country`) client-side, before any request is built.
- Quality-gated — every creative passes Dali scoring (≥70) before it's eligible to fill a slot.
- Intent, not identity — targeting uses this call's stated context only; no user profiles, no cross-session identifier.
- Misconfigured is still safe — a publisher with no valid `api_key` never reaches `/slot`; the client short-circuits to `None`/`null` with zero network calls.

Docs: https://getlulu.dev/docs · Agent-readable: https://getlulu.dev/docs.md · Coding-agent install file: https://getlulu.dev/install.md · Become a publisher: https://getlulu.dev/publishers · Advertise: https://getlulu.dev/advertisers · Source: https://github.com/Lulu-The-Narwhal/lulu-ads

## Integration in one line

Zero-friction (recommended) — add the MCP server and let an agent do the rest:

```bash
claude mcp add --transport http lulu-ads https://ads.getlulu.dev/mcp
```

Then say "monetize my server." Manual path:

```bash
pip install lulu-ads      # Python
npm install lulu-ads      # TypeScript
```

```python
mcp.add_middleware(LuluAdsMiddleware())  # FastMCP, credentials from env vars
```

## Dali (open source)

Dali by Lulu (dali.getlulu.dev) scores and rewrites generation prompts for 7 AI models (Imagen, Veo, Seedance, Kling, Higgsfield and more). It's an MCP server — plug it into any agent. Dali is also the quality gate behind Lulu Ads: every advertiser creative must clear a Dali score of 70+ before it's eligible to fill a sponsored slot, so publishers never carry low-quality or off-brand ads.

## Lulu for Brands

Lulu also runs as an autonomous growth team for DTC brands — paste your store's URL and meet a crew of specialist AI agents (a marketing optimizer, a creative director, a research analyst) that read your ad account, propose guardrailed optimizations, and generate on-brand creative, all gated on your one-tap approval. See https://getlulu.dev/growth for the full pitch, or go straight to the platform at https://app.getlulu.dev.

## Links

- Docs: https://getlulu.dev/docs
- Docs (markdown): https://getlulu.dev/docs.md
- Install (for coding agents): https://getlulu.dev/install.md
- Integration guides (index): https://getlulu.dev/docs/integrations
- FastMCP: https://getlulu.dev/docs/integrations/fastmcp
- Python client: https://getlulu.dev/docs/integrations/python
- OpenClaw: https://getlulu.dev/docs/integrations/openclaw
- Official MCP SDK: https://getlulu.dev/docs/integrations/typescript
- LangChain / LangGraph: https://getlulu.dev/docs/integrations/langgraph
- CrewAI: https://getlulu.dev/docs/integrations/crewai
- Skybridge: https://getlulu.dev/docs/integrations/skybridge
- Any agent runtime: https://getlulu.dev/docs/integrations/generic

- Widgets (lulu-ads ≥0.8.5): one widget renders on every host — verified live on claude.ai (MCP Apps) and ChatGPT (OpenAI Apps), full table + sponsored strip, with the rendered-impression beacon confirmed firing from real sessions on both. The SDK speaks three bridges (stable MCP Apps ui/initialize, draft-era fallback, window.openai), registers both template keys (ui.resourceUri + openai/outputTemplate), and declares both CSP dialects so the beacon clears every sandbox.
- Growth Kit (page): https://getlulu.dev/growth-kit
- Growth Kit (direct zip — playbook PDF, widget design guide, 5 agent-executable skills): https://getlulu.dev/api/ads/kit-download?src=llms
- Widget design guide (markdown): https://getlulu.dev/widget-design.md
- Publishers: https://getlulu.dev/publishers
- Advertisers: https://getlulu.dev/advertisers
- Growth (Lulu for Brands): https://getlulu.dev/growth
- Platform app: https://app.getlulu.dev
- Ads API: https://ads.getlulu.dev
- Ads MCP server: https://ads.getlulu.dev/mcp
- Dali: https://dali.getlulu.dev
- GitHub: https://github.com/Lulu-The-Narwhal/lulu-ads

## Lulu MCPs — the unified MCP marketplace

Lulu MCPs (https://getlulu.dev/mcps) is the largest MCP server marketplace in the world: 118,000+ Model Context Protocol servers, aggregated and deduplicated from every major registry — the official MCP Registry, Glama, PulseMCP and Smithery (with attribution and a linkback to every source) — into one searchable index larger than any single registry alone. The index updates automatically (hourly for the official registry, every 6 hours for Glama/PulseMCP, weekly full sweep for Smithery), so the count only grows. Each server page carries install commands per client (Claude Code, Claude.ai, Cursor, JSON), a cross-registry trust & traction score, tools, and badges (monetized, native-widgets, multi-registry, official). Sponsored listings are always disclosed and never influence organic ranking.

- Search (humans): https://getlulu.dev/mcps
- Server pages: https://getlulu.dev/mcps/<slug> (append /md for a clean markdown mirror, e.g. https://getlulu.dev/mcps/<slug>/md)
- Browse by category: https://getlulu.dev/mcps/category/<dev-tools|data-apis|cloud|security|travel|finance|creative|productivity> (append /md for markdown)
- Browse dev tools by subcategory: https://getlulu.dev/mcps/category/dev-tools/<git-vc|cicd|testing|ide|observability|package-mgmt|databases|automation> (append /md for markdown)
- Browse data & APIs by subcategory: https://getlulu.dev/mcps/category/data-apis/<rest-integrations|databases-sql|research|public-data|pipelines-etl|geospatial|vector-search|web-scraping> (append /md for markdown)
- Submit a server: https://getlulu.dev/mcps/submit
- Agent-native search (MCP server): claude mcp add --transport http lulu-registry https://ads.getlulu.dev/registry/mcp