Get a topic

Get a topic

GET /api/v1/topics/{topicId} One topic, plus what it costs: the number of refusals recorded on it, and the campaigns and sequences that carry it. That is what tells you in advance why a deletion will be refused.

Authorization

Role in the organization	This endpoint
`OWNER`	Allowed
`ADMIN`	Allowed
`MEMBER`	Refused — `403`

This one is stricter than the listing: knowing what a topic holds is the same right as deleting it. A member can still read the names and ids with List topics. A key carries the role its creator holds in this organization — never a role on AgentsMail itself. See API keys.

Path parameters

Parameter	Type	Description
`topicId`	string	Required. The topic to read

Example

bash

curl -H "x-api-key: $AGENTMAIL_API_KEY" \
  "https://www.agentsmail.io/api/v1/topics/$TOPIC_ID"

Response

200 OK — the topic and its usage.
401 Unauthorized — missing or invalid key, or its owner left the organization.
403 Forbidden — the key's owner is a member of the organization, not an admin.
404 Not Found — no such topic, or it belongs to another organization. The API never confirms that an id exists to a caller who has no right to it.
429 Too Many Requests — over 120 requests in a minute for this key.

Response fields

Field	Type	Description
`success`	boolean	Indicates if the operation was successful
`data.id`	string	Unique identifier for the topic
`data.name`	string	Name of the topic, unique in the organization
`data.createdAt`	string	ISO creation date
`data.updatedAt`	string	ISO date of the last change
`data.optOutCount`	number	Contacts who declined this topic — lost if you delete it
`data.campaigns`	array	Campaigns carrying it, `{id, name, status}`
`data.sequences`	array	Sequences carrying it, `{id, name, status}`

Example response

json

{
  "success": true,
  "data": {
    "id": "7c2e4b19",
    "name": "freelancing",
    "createdAt": "2026-03-04T08:11:00.000Z",
    "updatedAt": "2026-08-01T10:42:19.000Z",
    "optOutCount": 42,
    "campaigns": [
      {"id": "4d19c0a2", "name": "Freelance news", "status": "sent"}
    ],
    "sequences": []
  }
}

Notes

The counts are read live. A campaign created a second ago already appears here — which is why a deletion recomputes them rather than trusting what you last read.
Empty campaigns and sequences mean the topic can be deleted. optOutCount says what that deletion would throw away.