> ## Documentation Index
> Fetch the complete documentation index at: https://deepline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Upcell Guide

> Use contact existence first when you only need to check mobile availability for free; use contact enrichment to reveal matched mobile numbers.

## Playbook

# Upcell

Use Upcell when the workflow needs mobile phone availability checks or matched
mobile phone reveal for a known person.

Prefer `upcell_contact_existence` first when the user only needs to know whether
a mobile exists, because it is free. Use `upcell_enrich_contact` when the mobile
number itself is needed.

For both actions, provide at least one strong matcher:

* `linkedinUrl`
* `email`
* `personalEmail`
* `firstName`, `lastName`, `title`, and `companyName`
* `firstName`, `lastName`, and either `companyDomain` or `companySocialUrl`

Only mobile workflows are currently enabled. Email, social URL, and usage stats
endpoints are intentionally not exposed until pricing and availability are
confirmed.