# GalaxyIDX > MLS/IDX listings and lead capture for real-estate websites, built to be installed by AI coding agents. Listing pages render server-side on the customer's own domain, the MLS display rules are enforced by the API, and every key is limited to one account. Install via a WordPress plugin, server-rendered routes (Next.js, Astro, any stack) or the remote MCP server. Rules an agent must follow when installing: - Keep the secret key (`sk_…`) on the server only, in an environment variable (`IDX_SECRET_KEY`). Never in client code, a public env var, or source control. - Render listings server-side on the customer's domain. Never an iframe. - Show the listing firm, MLS name/logo, last-updated date and disclaimer with every listing. Never crop or overlay photos (`object-fit: contain`). - Never invent or estimate a listing fact; a missing value is shown as `—`. - Objective search filters only (Fair Housing). No SMS consent on lead forms. - The customer's broker must authorize the site with the MLS before listings appear; an agent cannot do that step. ## Docs - [Overview](https://docs.galaxyidx.com/docs/index.md): what it is, the install paths, prerequisites, price - [Quickstart: WordPress](https://docs.galaxyidx.com/docs/quickstart-wordpress.md): plugin install and checks - [Quickstart: Next.js and Astro](https://docs.galaxyidx.com/docs/quickstart-nextjs-astro.md): server-rendered routes and env vars - [Quickstart: any site](https://docs.galaxyidx.com/docs/quickstart-api.md): plain HTTP from any server stack - [Authentication](https://docs.galaxyidx.com/docs/authentication.md): secret vs publishable keys, errors - [Listings](https://docs.galaxyidx.com/docs/listings.md): search, detail, area stats, snapshot, field reference - [Leads and notifications](https://docs.galaxyidx.com/docs/leads.md): lead capture, email/CRM/webhook routing, webhook signatures - [MLS licensing and price](https://docs.galaxyidx.com/docs/mls-licensing.md): broker authorization, onboarding, $10/month per site + MLS fee at cost - [Compliance](https://docs.galaxyidx.com/docs/compliance.md): the display rules and what the API enforces - [SEO and AI search](https://docs.galaxyidx.com/docs/seo.md): one indexed page per listing, schema.org, sitemaps, area pages - [MCP server](https://docs.galaxyidx.com/docs/mcp.md): connect an AI agent; tool list ## API - [OpenAPI 3.1 spec](https://docs.galaxyidx.com/openapi.json): every endpoint, both key types, the error shape - [Agent skill](https://docs.galaxyidx.com/skill/SKILL.md): step-by-step install skill for AI coding agents ## Optional - [llms-full.txt](https://galaxyidx.com/llms-full.txt): all docs in one file