> For the complete documentation index, see [llms.txt](https://developers.myperfit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.myperfit.com/contacts-api/usos-mas-frecuentes.md).

# Usos más frecuentes

Para ver el listado todos los de endpoints disponibles, con todos sus parámetros y opciones visita la [referencia completa de la API](https://perfitapiv2.docs.apiary.io/#)

{% hint style="info" %}
Para simplicidad de los ejemplos, no estamos manejando los errores que pueden producirse al hacer las llamadas a la API. 

En un ambiente productivo es importante capturar los errores de forma adecuada.
{% endhint %}

#### Sobre los ejemplos en Node.js

Para los ejemplos en Node.js utilizaremos la librería [axios](https://github.com/axios/axios), por su simplicidad. Deberás instarla de esta forma:

```bash
npm install axios
```

y luego la puedes incluir así:

```javascript
const axios =  require('axios');
```

## Ejemplos:

{% content-ref url="/pages/-MLOUZdtsu0moaXeR5vd" %}
[Crear o actualizar un contacto en una lista](/contacts-api/usos-mas-frecuentes/crear-o-actualizar-un-contacto-en-una-lista.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MLOUtbGC-AVlw7uKPFK" %}
[Modificar un contacto existente](/contacts-api/usos-mas-frecuentes/modificar-un-contacto-existente.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MLOVBMAc36RQ4Wh-zvG" %}
[Agregar un interés a un contacto](/contacts-api/usos-mas-frecuentes/agregar-un-interes-a-un-contacto.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MLOVJvKuTRhgEvfb1VD" %}
[Desuscribir a un contacto](/contacts-api/usos-mas-frecuentes/desuscribir-a-un-contacto.md)
{% endcontent-ref %}


---

# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://developers.myperfit.com/contacts-api/usos-mas-frecuentes.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
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