---
title: "Create Tunnel"
method: POST
path: "/v1/tunnels?beta=true"
---

# Create Tunnel

`POST /v1/tunnels?beta=true`

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.

## Headers

- `anthropic-version` string
- `anthropic-beta` string

## Request body

- BetaCreateTunnelRequest — Request parameters for creating a tunnel.
  - `display_name` string, nullable — Optional human-readable name for the tunnel (1-255 characters).

## Response `200`

Successful response (OK)

- BetaTunnel — An MCP tunnel.
  - `type` 'tunnel', required
  - `id` string, required — Unique identifier for the tunnel, prefixed with `tnl_`.
  - `domain` string, required — 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.
  - `display_name` string, nullable, required — Human-readable name for the tunnel (1-255 characters). Null if unset.
  - `created_at` string, date-time, required — A timestamp in RFC 3339 format
  - `archived_at` string, date-time, required — A timestamp in RFC 3339 format

## Other responses

- `400` — Invalid argument - The client specified an invalid argument
- `401` — Unauthenticated - The request does not have valid authentication credentials
- `403` — Permission denied - The caller does not have permission to execute the specified operation
- `404` — Not found - Some requested entity was not found
- `408` — Deadline exceeded - The deadline expired before the operation could complete
- `409` — Aborted - The operation was aborted due to concurrency issue
- `412` — Failed precondition - Operation was rejected because the system is not in required state
- `413` — Out of range - Operation was attempted past the valid range
- `429` — Resource exhausted - Some resource has been exhausted (rate limiting)
- `431` — Request header fields too large - Request metadata was too large
- `499` — Cancelled - The operation was cancelled by the client
- `500` — Internal - Internal server error
- `501` — Unimplemented - The operation is not implemented or supported
- `503` — Unavailable - The service is currently unavailable
- `504` — Deadline exceeded - Upstream service did not respond in time

---

[API](https://skmtc.net/anthropics/apis/anthropic-api.md) · [All operations](https://skmtc.net/anthropics/apis/anthropic-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/anthropics/anthropic-api/revisions/93d8fd7d6493/schema)