Create Tunnel

$ ant beta:tunnels create

POST/v1/tunnels

The Tunnels API is in research preview. It requires the anthropic-beta: mcp-tunnels-2026-06-22 header and may change without a deprecation period. It supersedes the Admin API endpoints at /v1/organizations/tunnels, which remain available during a migration window.

Creates a tunnel. Creation allocates a fresh hostname and provisions the tunnel; it is not idempotent. The new tunnel rejects MCP traffic until at least one CA certificate is added.

Parameters

--display-name: optional string

Body param: Optional human-readable name for the tunnel (1-255 characters).

minLength1

maxLength255

--beta: optional array of AnthropicBeta

Header param: Optional header to specify the beta version(s) you want to use.

Returns

beta_tunnel: object{ id, archived_at, created_at, 3 more }

An MCP tunnel.

id: string

Unique identifier for the tunnel, prefixed with tnl_.

archived_at: string

A timestamp in RFC 3339 format

formatdate-time

created_at: string

A timestamp in RFC 3339 format

formatdate-time

display_name: string

Human-readable name for the tunnel (1-255 characters). Null if unset.

domain: string

Anthropic-assigned hostname for the tunnel. MCP server URLs whose host is a subdomain of this value are routed through the tunnel. Globally unique and never reused, even after the tunnel is archived.

type: "tunnel"

Create Tunnel

ant beta:tunnels create \
  --api-key my-anthropic-api-key

{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "display_name": "display_name",
  "domain": "domain",
  "type": "tunnel"
}

Returns Examples

{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "display_name": "display_name",
  "domain": "domain",
  "type": "tunnel"
}