---
title: Get Tunnel Certificate
url: https://platform.claude.com/docs/en/api/typescript/beta/tunnels/certificates/retrieve
---

# Get Tunnel Certificate

`client.beta.tunnels.certificates.retrieve(certificateID, params, options?): BetaTunnelCertificate`

**GET** `/v1/tunnels/{tunnel_id}/certificates/{certificate_id}`

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.

Fetches a tunnel certificate by ID.

## Parameters

- `certificateID: string` (path parameter)

  ID of the certificate (`tcrt_...`).

- `params: CertificateRetrieveParams`

  - `tunnel_id: string` (path parameter)

    ID of the tunnel (`tnl_...`).

  - `betas?: Array<AnthropicBeta>` (header parameter)

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

    - `(string & {})`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"user-profiles-2026-08-18"`

    - `"user-profiles-2026-09-04"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"dreaming-2026-04-21"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"server-side-fallback-2026-07-01"`

    - `"fallback-credit-2026-06-01"`

    - `"fallback-credit-2026-07-01"`

    - `"agent-memory-2026-07-22"`

    - `"mid-conversation-tool-changes-2026-07-01"`

    - `"compact-2026-01-12"`

    - `"computer-use-2025-11-24"`

    - `"mcp-tunnels-2026-06-22"`

    - `"structured-outputs-2025-11-13"`

    - `"task-budgets-2026-03-13"`

    - `"thinking-display-updates-2026-08-18"`

    - `"ce-user-management-2026-07-13"`

    - `"mid-conversation-output-config-2026-07-01"`

    - `"thinking-binding-controls-2026-08-01"`

    - `"mid-conversation-system-clear-at-2026-08-21"`

    - `"compact-2026-09-04"`

    - `"inline-tools-2026-09-15"`

    - `"mcp-client-2026-09-15"`

    - `"ce-plugins-2026-09-01"`

    - `"spend-limit-reads-2026-09-26"`

  - `workspace_id?: string` (header parameter)

    Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

    Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

## Returns

- `interface BetaTunnelCertificate`

  A CA certificate attached to a tunnel.

  - `type: "tunnel_certificate"`

  - `id: string`

    Unique identifier for the certificate, prefixed with `tcrt_`.

  - `archived_at: string | null`

    RFC 3339 datetime string indicating when the certificate was archived. Null if it is still in the trusted set.

    format: date-time

  - `created_at: string`

    RFC 3339 datetime string indicating when the certificate was registered.

    format: date-time

  - `expires_at: string | null`

    RFC 3339 datetime string indicating when the certificate expires, or `null` if it does not expire.

    format: date-time

  - `fingerprint: string`

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

  - `tunnel_id: string`

    ID of the tunnel the certificate is registered against.

## Example

```typescript
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: process.env["ANTHROPIC_API_KEY"] // This is the default and can be omitted
});

const betaTunnelCertificate = await client.beta.tunnels.certificates.retrieve(
  "certificate_id",
  { tunnel_id: "tunnel_id" }
);

console.log(betaTunnelCertificate.id);
```

### Response (200)

```json
{
  "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"
}
```