# add_comment_reaction

Source: https://modulify.ai/docs/api/comments/add-comment-reaction

Adds an emoji reaction to a comment or a reply.

- Title: React to a comment
- Scope: `comments:write`
- Access: Makes changes
- Endpoint: `POST /v1/add_comment_reaction`

Each person holds one reaction per comment or reply, and reactions work on replies too, not only on root comments. Reacting again with a different one replaces yours, and reacting again with the same one is refused with a 400 and `You have already reacted with this emoji!` See [Comments](https://modulify.ai/docs/editor/comments#read-and-reply).

## Request

Call it with a `POST` to `https://api.modulify.ai/v1/add_comment_reaction`, sending the inputs below as a JSON object. The token needs the `comments:write` scope.

It makes changes, so send an [Idempotency-Key](https://modulify.ai/docs/api/idempotency) header whenever you might retry it. A retry with the same key gets the first answer back instead of running again.

```bash
curl -X POST https://api.modulify.ai/v1/add_comment_reaction \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"commentId":"COMMENT_ID","emoji":"EMOJI"}'
```

Over MCP, the same method is the [add_comment_reaction tool](https://modulify.ai/docs/mcp/comments/add-comment-reaction).

## Inputs

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `commentId` | string | Yes | The comment or reply id. |
| `emoji` | string | Yes | The reaction name, not the emoji character. `like` is a thumbs up, `love` a heart, `wow` a surprised face, `applause` clapping hands, `angry` an angry face and `sad` a crying face. |

## Response

Every call answers with the [JSON envelope](https://modulify.ai/docs/api/requests-and-responses#the-response) of `success`, `message`, `data`, `code` and `version`. `data` holds the result described above, and on a method that returns a total, `count` carries it. The [response headers](https://modulify.ai/docs/api/requests-and-responses#headers-on-every-method-call) carry the call's `X-Request-Id` and what is left of your per-minute budget in `X-RateLimit-Limit`, `X-RateLimit-Remaining` and `X-RateLimit-Reset`. [Errors](https://modulify.ai/docs/api/errors) explains every status code a call can answer with.