Create a list

Create a list

POST /api/v1/lists A list is the container contacts live in. Create one, then feed it through the contact endpoints. Update and delete are not exposed yet; reading the lists you already have is on Discovery. The list is always created in the organization of the API key; the response carries its id, ready to use in the contact endpoints.

Authorization

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

A key carries the role its creator holds in this organization — never a role on AgentsMail itself. See API keys.

Request body

Field	Type	Required	Description
`name`	string	yes	1 to 100 characters

Example

bash

curl -X POST -H "x-api-key: $AGENTMAIL_API_KEY" -H "content-type: application/json" \
  -d '{"name":"Newsletter"}' \
  "https://www.agentsmail.io/api/v1/lists"

Response

201 Created — the created resource.
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.
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 list
`data.name`	string	Name of the list
`data.contactCount`	number	Contacts it holds
`data.createdAt`	string	ISO creation date
`data.updatedAt`	string	ISO date of the last change

Example response

json

{
  "success": true,
  "data": {
    "id": "4d19c0a2",
    "name": "Newsletter",
    "contactCount": 128,
    "createdAt": "2026-08-23T10:22:05.000Z",
    "updatedAt": "2026-08-23T10:22:05.000Z"
  }
}