Create Tunnel Certificate

$client->beta->tunnels->certificates->create(string tunnelID, string caCertificatePEM, ?list<AnthropicBeta> betas, ?string workspaceID): TunnelCertificate

POST/v1/tunnels/{tunnel_id}/certificates

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.

Registers a public CA certificate on a tunnel. Anthropic verifies the gateway's server certificate against this CA when it terminates the inner TLS session. A tunnel holds at most two non-archived certificates.

Parameters

tunnelID: string

caCertificatePEM: string

PEM-encoded X.509 CA certificate. Must contain exactly one certificate and no private-key material. Maximum 8KB.

betas?:optional list<AnthropicBeta>

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

workspaceID?:optional string

Returns

class TunnelCertificate { $type = 'tunnel_certificate'; $id; $archivedAt; /* 4 more */ }

"tunnel_certificate" type

string id

Unique identifier for the certificate, prefixed with tcrt_.

?\Datetime archivedAt

A timestamp in RFC 3339 format

\Datetime createdAt

A timestamp in RFC 3339 format

?\Datetime expiresAt

A timestamp in RFC 3339 format

string fingerprint

Lowercase hex SHA-256 fingerprint of the certificate's DER encoding.

string tunnelID

ID of the tunnel the certificate is registered against.

Create Tunnel Certificate

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$betaTunnelCertificate = $client->beta->tunnels->certificates->create(
  'tunnel_id',
  caCertificatePEM: 'ca_certificate_pem',
  betas: [AnthropicBeta::MESSAGE_BATCHES_2024_09_24],
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($betaTunnelCertificate);

Response 200

{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "expires_at": "2019-12-27T18:11:19.117Z",
  "fingerprint": "fingerprint",
  "tunnel_id": "tunnel_id",
  "type": "tunnel_certificate"
}

Returns Examples

Response 200

{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "expires_at": "2019-12-27T18:11:19.117Z",
  "fingerprint": "fingerprint",
  "tunnel_id": "tunnel_id",
  "type": "tunnel_certificate"
}