One change

Create Tunnel Certificate

api/beta/tunnels/certificates/create

25 Aug 2026 03:37 UTC first seen 14 Aug 2026 The page's own history The capture it came from

Nearest release: v2.1.245, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

api/beta/tunnels/certificates/create Changed · +18 / -17 lines

# Create Tunnel Certificate ## Path parameters ## Headers ## Body parameters ## Returns ## Example ### Response (200) ## Create Tunnel Certificate ### Path Parameters ### Header Parameters ### Body Parameters ### Returns ### Example #### Response

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----
-title: Create Tunnel Certificate
-url: https://platform.claude.com/docs/en/api/beta/tunnels/certificates/create
----
+# Create Tunnel Certificate
 
-## Create Tunnel Certificate
+**POST** `/v1/tunnels/{tunnel_id}/certificates`
 
-**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.
 
-### Path Parameters
+## Path parameters
 
 - `tunnel_id: string`
 
-### Header Parameters
+## Headers
 
 - `"anthropic-beta": optional array of AnthropicBeta`

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     - `"mid-conversation-tool-changes-2026-07-01"`
 
-### Body Parameters
+## Body parameters
 
 - `ca_certificate_pem: string`
 
   PEM-encoded X.509 CA certificate. Must contain exactly one certificate and no private-key material. Maximum 8KB.
 
-### Returns
+  maxLength: 8192
 
-- `BetaTunnelCertificate object { id, archived_at, created_at, 4 more }`
+## Returns
 
+- `BetaTunnelCertificate object`
+
   A CA certificate attached to a tunnel.
 
   - `id: string`

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     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `created_at: string`
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `expires_at: string or null`
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `fingerprint: string`
 
     Lowercase hex SHA-256 fingerprint of the certificate's DER encoding.

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   - `type: "tunnel_certificate"`
 
-    - `"tunnel_certificate"`
+## Example
 
-### Example
-
-```http
+```bash
 curl https://api.anthropic.com/v1/tunnels/$TUNNEL_ID/certificates \
     -H 'Content-Type: application/json' \
     -H 'anthropic-version: 2023-06-01' \

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         }'
 ```
 
-#### Response
+### Response (200)
 
 ```json
 {