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

# Update Lead

> Update any field on an existing lead. Metadata updates use **shallow merge** semantics: existing keys are preserved, new keys are added, and matching keys are overwritten. Non-metadata fields (first_name, phone, campaign_id, etc.) are replaced directly.



## API Specification

The full API specification for this endpoint is available in the [documentation index](https://docs.getnexor.ai/llms.txt).