---
title: "Update a contact property"
method: PATCH
path: "/contact-properties/{id}"
tags: ["Contact properties"]
---

# Update a contact property

`PATCH /contact-properties/{id}`

## Request

- Base URL: `https://api.mepmail.dev`
- URL: `https://api.mepmail.dev/contact-properties/{id}`
- Auth: HTTP bearer

Renames a custom contact field or changes its fallback value.

## Path parameters

- `id` string, uuid, required

## Request body

- UpdateContactPropertyRequest
  - `fallback_value` union
    - string
    - number

## Response `200`

Contact property updated

- ContactPropertyIdResponse
  - `object` 'contact_property', required
  - `id` string, uuid, required

## Other responses

- `401`: Missing, malformed or invalid API key
- `404`: Not found
- `422`: Validation error
- `429`: Rate limit exceeded: 600 requests per minute per API key and 3,000 per team; wait for Retry-After

---

[API](https://skmtc.dev/mepmail/apis/mepmail-api.md) · [All operations](https://skmtc.dev/mepmail/apis/mepmail-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mepmail/apis/mepmail-api/revisions/262a89f73730?raw)