---
title: "Attach a label to an event"
method: POST
path: "/api/event/{id}/labels/"
tags: ["Labels and notes"]
---

# Attach a label to an event

`POST /api/event/{id}/labels/`

## Request

- Base URL: `https://eyalsec.com`
- URL: `https://eyalsec.com/api/event/{id}/labels/`
- Auth: one of:
  - API key in header `X-API-Key`
  - API key in cookie `__Host-es2session`

Attaches one of the caller's labels to one of the caller's events. Re-attaching an already-attached label is a silent no-op, not an error, since the events-page toggle must survive a double-click. Both ids must belong to the caller, and event ids are sequential and enumerable, so a foreign event id replies 404, the same as a nonexistent one, never 403. Cookie callers must pass CSRF.

This is a **write**: a read-only API key is refused with 403.

## Path parameters

- `id` integer, required

## Request body

- object
  - `label_id` integer, required: Label id to attach.

## Response `204`

Done. No body.

## Other responses

- `401`: The API key is missing, wrong, revoked or expired.
- `429`: A rate limit was hit, or the account is locked after wrong passwords. Retry-After gives the seconds to wait.
- `default`: An error. Check the status first; the body carries a short message, as JSON ({"error": "..."}) on most endpoints and as plain text on some. 400: malformed JSON, an invalid regex, an unreadable cursor or date, or an unknown value. 401: the API key is missing, wrong, revoked or expired. 403: a failed CSRF check, a read-only key trying to write, a product or feature not enabled on your account, a wrong password, or a write on an account limited to reading. 404: not found, including things that belong to another account. 409: conflict with the current state. 422: a field is missing or invalid. 429: a rate limit was hit, or the account is locked after wrong passwords. 500: something failed on our side.

---

[API](https://skmtc.dev/eyalsec/apis/eyalsec-api.md) · [All operations](https://skmtc.dev/eyalsec/apis/eyalsec-api/llms.txt) · [OpenAPI document](https://skmtc.dev/eyalsec/apis/eyalsec-api/revisions/dc7520689cf1?raw)