---
title: Upload a Hostname Client Certificate
---

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[API Reference](https://developers.cloudflare.com/api/go)

[Origin TLS Client Auth](https://developers.cloudflare.com/api/go/resources/origin_tls_client_auth)

[Hostname Certificates](https://developers.cloudflare.com/api/go/resources/origin_tls_client_auth/subresources/hostname_certificates)

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# Upload a Hostname Client Certificate

client.OriginTLSClientAuth.HostnameCertificates.New(ctx, params) (\*[HostnameCertificateNewResponse](<https://developers.cloudflare.com/api/go/resources/origin_tls_client_auth#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)>), error)

POST/zones/{zone\_id}/origin\_tls\_client\_auth/hostnames/certificates

Upload a certificate to be used for client authentication on a hostname. 10 hostname certificates per zone are allowed.

##### Security

<details>

<summary>API Token</summary>



The preferred authorization scheme for interacting with the Cloudflare API. <a href="https://developers.cloudflare.com/fundamentals/api/get-started/create-token/">Create a token</a>.

**Example:**<code>Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY</code>

</details>

<details>

<summary>API Email + API Key</summary>



The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.

**Example:**<code>X-Auth-Email: user@example.com</code>

The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.

**Example:**<code>X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194</code>

</details>

##### Accepted Permissions (at least one required)

`SSL and Certificates Write`

##### ParametersExpand Collapse

<details>

<summary>

params HostnameCertificateNewParams

</summary>

ZoneID param.Field\[string]

Path param: Identifier.

maxLength32

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20zone_id">Link to this property</a>

Certificate param.Field\[string]

Body param: The hostname certificate.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20certificate">Link to this property</a>

PrivateKey param.Field\[string]

Body param: The hostname certificate’s private key.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20private_key">Link to this property</a>

</details>

[Link to this property](<#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(method)%20create%20%3E%20(params)%20default>)

##### ReturnsExpand Collapse

<details>

<summary>

type HostnameCertificateNewResponse struct{…}

</summary>

ID stringOptional

Certificate identifier tag.

maxLength36

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20id">Link to this property</a>

Certificate stringOptional

The hostname certificate.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20certificate">Link to this property</a>

ExpiresOn TimeOptional

The date when the certificate expires.

formatdate-time

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20expires_on">Link to this property</a>

Issuer stringOptional

The certificate authority that issued the certificate.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20issuer">Link to this property</a>

SerialNumber stringOptional

The serial number on the uploaded certificate.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20serial_number">Link to this property</a>

Signature stringOptional

The type of hash used for the certificate.

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20signature">Link to this property</a>

<details>

<summary>

Status HostnameCertificateNewResponseStatusOptional

Status of the certificate or the association.

</summary>

One of the following:

const HostnameCertificateNewResponseStatusInitializing HostnameCertificateNewResponseStatus = "initializing"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%200">Link to this property</a>

const HostnameCertificateNewResponseStatusPendingDeployment HostnameCertificateNewResponseStatus = "pending\_deployment"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%201">Link to this property</a>

const HostnameCertificateNewResponseStatusPendingDeletion HostnameCertificateNewResponseStatus = "pending\_deletion"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%202">Link to this property</a>

const HostnameCertificateNewResponseStatusActive HostnameCertificateNewResponseStatus = "active"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%203">Link to this property</a>

const HostnameCertificateNewResponseStatusDeleted HostnameCertificateNewResponseStatus = "deleted"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%204">Link to this property</a>

const HostnameCertificateNewResponseStatusDeploymentTimedOut HostnameCertificateNewResponseStatus = "deployment\_timed\_out"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%205">Link to this property</a>

const HostnameCertificateNewResponseStatusDeletionTimedOut HostnameCertificateNewResponseStatus = "deletion\_timed\_out"

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status%20%3E%20(member)%206">Link to this property</a>

</details>

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20status">Link to this property</a>

UploadedOn TimeOptional

The time when the certificate was uploaded.

formatdate-time

<a href="#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)%20%3E%20(property)%20uploaded_on">Link to this property</a>

</details>

[Link to this property](<#(resource)%20origin_tls_client_auth.hostname_certificates%20%3E%20(model)%20HostnameCertificateNewResponse%20%3E%20(schema)>)

### Upload a Hostname Client Certificate

Go

HTTPTypeScriptPythonGoTerraform

```
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/option"
  "github.com/cloudflare/cloudflare-go/origin_tls_client_auth"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  hostnameCertificate, err := client.OriginTLSClientAuth.HostnameCertificates.New(context.TODO(), origin_tls_client_auth.HostnameCertificateNewParams{
    ZoneID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
    Certificate: cloudflare.F("-----BEGIN CERTIFICATE-----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\nYbjM2rxXiyLGxB4Bol7QTv4zHif7Zt89FReT/NBy4rzaskDJY5L6xmY=\n-----END CERTIFICATE-----\n"),
    PrivateKey: cloudflare.F("-----BEGIN RSA PRIVATE KEY-----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\nlv6XTQaMyf6n1yjzL+fzDrH3qXMxHMO/b13EePXpDMpY7HQpoLDi\n-----END RSA PRIVATE KEY-----\n"),
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", hostnameCertificate.ID)
}
```

200 example

```
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "id": "2458ce5a-0c35-4c7f-82c7-8e9487d3ff60",
    "certificate": "-----BEGIN CERTIFICATE-----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\nYbjM2rxXiyLGxB4Bol7QTv4zHif7Zt89FReT/NBy4rzaskDJY5L6xmY=\n-----END CERTIFICATE-----\n",
    "expires_on": "2100-01-01T05:20:00Z",
    "issuer": "GlobalSign",
    "serial_number": "6743787633689793699141714808227354901",
    "signature": "SHA256WithRSA",
    "status": "active",
    "uploaded_on": "2019-10-28T18:11:23.37411Z"
  }
}
```

##### Returns Examples

200 example

```
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "id": "2458ce5a-0c35-4c7f-82c7-8e9487d3ff60",
    "certificate": "-----BEGIN CERTIFICATE-----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\nYbjM2rxXiyLGxB4Bol7QTv4zHif7Zt89FReT/NBy4rzaskDJY5L6xmY=\n-----END CERTIFICATE-----\n",
    "expires_on": "2100-01-01T05:20:00Z",
    "issuer": "GlobalSign",
    "serial_number": "6743787633689793699141714808227354901",
    "signature": "SHA256WithRSA",
    "status": "active",
    "uploaded_on": "2019-10-28T18:11:23.37411Z"
  }
}
```