curl -X POST 'https://api.anthropic.com/v1/tunnels/tunnel-id/certificates?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01' \
  -H 'Content-Type: application/json' \
  -d '{
  "ca_certificate_pem": "example-ca-certificate-pem"
}'

# POST /v1/tunnels/{tunnel_id}/certificates?beta=true (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Status: Beta.
Request formats: application/json.
Last verified: 2026-10-20

> Create Tunnel Certificate

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X POST 'https://api.anthropic.com/v1/tunnels/tunnel-id/certificates?beta=true' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01' \
  -H 'Content-Type: application/json' \
  -d '{
  "ca_certificate_pem": "example-ca-certificate-pem"
}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| tunnel_id | path | string | Yes | Path parameter tunnel_id |
| ca_certificate_pem | body | string | Yes | PEM-encoded X.509 CA certificate. Must contain exactly one certificate and no... |

## Response example
{"type":"string","id":"string"}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

POST

POST /v1/tunnels/{tunnel_id}/certificates?beta=true — Claude API

Beta

Anthropic API key (required); https://api.anthropic.com

Claude API

Create Tunnel Certificate

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 206 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X POST 'https://api.anthropic.com/v1/tunnels/tunnel-id/certificates?beta=true' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01' \  -H 'Content-Type: application/json' \  -d '{  "ca_certificate_pem": "example-ca-certificate-pem"}'

Parameters

Name	In	Type	Required	Description
tunnel_id	path	string	Yes	Path parameter tunnel_id
ca_certificate_pem	body	string	Yes	PEM-encoded X.509 CA certificate. Must contain exactly one certificate and no private-key material. Maximum 8KB.

Response 200 OK

{
  "type": "string",
  "id": "string",
  "tunnel_id": "string",
  "fingerprint": "string",
  "expires_at": "2026-09-03T00:00:00Z",
  "created_at": "2026-09-03T00:00:00Z",
  "archived_at": "2026-09-03T00:00:00Z"
}

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