# Developer & integrations center

Put the Multilistado search on the website you already have — no coding — or connect your CRM, portal or MLS to our APIs. Everything is free for agents and agencies with a verified license.

Source: https://multilistado.mx/developers?lang=en · Updated: 2026-09-30 · Other language: https://multilistado.mx/developers.md

## What do you want to do?

## Fastest: the search on your site in 5 minutes

1. Sign in to your portal and open **More → IDX widget** ([/portal/widget](https://multilistado.mx/portal/widget)). If it is your first widget, click **Create widget**.
2. Choose what to show (the whole Multilistado or only your listings), default filters and colors. The preview updates as you go.
3. Copy the code and paste it into your site:

```html
<script src="https://multilistado.mx/embed/w/YOUR-ID.js" async></script>
<div data-multilistado="search"></div>
```

```text
[multilistado_busqueda]
```

```html
<iframe src="https://multilistado.mx/embed/w/YOUR-ID" title="Property search" style="width:100%;min-height:900px;border:0" loading="lazy"></iframe>
```

Replace `YOUR-ID` with your widget's 24-character ID. This is how it looks (live demo):

_(Live demo on the HTML version of this page.)_

- Other agents' listings show their credit ("Listed by…") and **inquiries come to you**.
- Every showing requires the buyer to verify their ID (done on multilistado.mx, in a new tab).
- Step-by-step guides: [WordPress](https://multilistado.mx/developers/wordpress?lang=en) · [Wix, Squarespace, GoDaddy, Shopify, Webflow, Google Sites, Blogger and HTML](https://multilistado.mx/developers/widget?lang=en#plataformas) · [snippet builder](https://multilistado.mx/developers/widget?lang=en#generador).

## For developers

| What | For | Authentication | Docs |
|---|---|---|---|
| **IDX widget** | Search, map and listing pages inside your site; leads to you | Public widget ID | [/developers/widget](https://multilistado.mx/developers/widget?lang=en) |
| **WordPress plugin** | The same, with a shortcode and a block | Widget ID | [/developers/wordpress](https://multilistado.mx/developers/wordpress?lang=en) |
| **REST API v1** | Search the MLS, publish your listings, leads | API key (`Bearer pbm_…`) | [/developers/api](https://multilistado.mx/developers/api?lang=en) · [OpenAPI reference](https://multilistado.mx/developers/api/reference?lang=en) |
| **Webhooks** | Get leads and changes in your CRM instantly | HMAC-SHA256 signature | [/developers/webhooks](https://multilistado.mx/developers/webhooks?lang=en) |
| **Feeds** | Syndicate your listings to portals (XML/JSON), RSS | Public, per account | [/developers/feeds](https://multilistado.mx/developers/feeds?lang=en) |
| **RESO Web API** | US MLSs, IDX vendors and CRMs (OData, Data Dictionary 2.0) | OAuth2 client credentials or API key | [/developers/reso](https://multilistado.mx/developers/reso?lang=en) |
| **For AI / LLMs** | Plain-text context and a Markdown twin of every page | Public | [/llms.txt](https://multilistado.mx/llms.txt) · [Markdown](https://multilistado.mx/developers/feeds?lang=en#llm) |

Create a free API key at https://multilistado.mx/portal/api-keys (verified agents).

## Version status

| Interface | Version | Status |
|---|---|---|
| IDX widget (`/embed/w/<id>`) and `.js` loader | 1 | Stable |
| WordPress plugin "Multilistado IDX" | 1.0.0 | Stable |
| REST API | v1 (`/api/v1`, OpenAPI 1.1.0) | Stable; additive changes only |
| Webhooks | 1 | Stable |
| RESO Web API | Web API Core 2.0.0 + Data Dictionary 2.0 | Available (read-only); not yet RESO-certified |
| Legacy widget `/widget.js` | — | Kept working, no new features |

Changelog, usage rules and support: [Guidelines](https://multilistado.mx/developers/guidelines?lang=en).