---
title: "Set a message reaction"
method: PUT
path: "/messages/{messageId}/reactions"
tags: ["Messages"]
---

# Set a message reaction

`PUT /messages/{messageId}/reactions`

Add or remove an emoji reaction on a message.

Reactions are INTERNAL — never visible to end customers, never fire
webhooks/SLA/unread, never move the ticket's latest message. The update
reaches open dashboards via the ordinary comment.updated broadcast.

## Path parameters

- `messageId` string, required

## Headers

- `project` string, required

## Request body

- SetReactionDto — Body of PUT /v3/messages/{messageId}/reactions. Explicit op instead of a blind toggle: idempotent and retry-safe, and immune to the optimistic-UI race where a stale toggle inverts intent.
  - `emoji` string, required — The unicode emoji, e.g. "👍" or "👨‍👩‍👧". Validated server-side (pictographic/keycap/flag required, max 32 UTF-16 units).
  - `op` 'add' | 'remove', required

## Response `200`

Ok

- unknown

---

[API](https://skmtc.net/gleap/apis/gleap-server.md) · [All operations](https://skmtc.net/gleap/apis/gleap-server/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/gleap/gleap-server/versions/6f02af3a6c47/schema)