For those who want to connect WordPress to GPTs:

[iAli]

This guide simplifies the process, covering JWT Authentication setup, GPT actions, schema… and key configurations.

1- Install the JWT Authentication Plugin

• Download and install from: JWT Authentication for WP REST API
• Access your WordPress site’s root directory using FTP.
• Open and edit the .htaccess file to enable PHP HTTP Authorization Header. Add the following lines:

RewriteEngine on
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule ^(.*) - [E=HTTP_AUTHORIZATION:%1]

Save the .htaccess file. (Note: Ensure your hosting allows .htaccess file modifications.)

2-Configure the Secret Key

• Open and edit wp-config.php.
• Add a new constant called JWT_AUTH_SECRET_KEY:

define('JWT_AUTH_SECRET_KEY', 'your-top-secret-key');

Replace 'your-top-secret-key' with a unique secret key, you can use a string from here.

3-Configure CORS Support
In wp-config.php, add a new constant called JWT_AUTH_CORS_ENABLE:

define('JWT_AUTH_CORS_ENABLE', true);

Save wp-config.php .

4-Testing with Postman or HTTPie

Submit a POST request to the following endpoint (no authentication, only JSON body):

https://yourwordpress.com/wp-json/jwt-auth/v1/token

JSON body:

{
  "username": "your-username",
  "password": "your-password"
}

Copy and save your token.

Now, submit a POST request to this endpoint:
wp-json/wp/v2/posts/

Header:
Authorization: Bearer {token}

good!

now, Create a new action in your GPT configuration, and use the API schema below ( don’t forget to edit your server URL. )

{
  "openapi": "3.1.0",
  "info": {
    "title": "WordPress API",
    "description": "API for creating and editing posts in WordPress",
    "version": "1.0.0"
  },
  "servers": [
    {
      "url": "https://yourwordpress.com/wp-json"
    }
  ],
  "paths": {
    "/wp/v2/posts": {
      "post": {
        "summary": "Create a new post",
        "operationId": "createPost",
        "tags": ["Posts"],
        "requestBody": {
          "description": "Post data",
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/Post"
              }
            }
          },
          "required": true
        },
        "responses": {
          "201": {
            "description": "Post created",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Post"
                }
              }
            }
          }
        }
      }
    },
    "/wp/v2/posts/{id}": {
      "put": {
        "summary": "Edit an existing post",
        "operationId": "editPost",
        "tags": ["Posts"],
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "integer"
            },
            "description": "The ID of the post to edit"
          }
        ],
        "requestBody": {
          "description": "Updated post data",
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/Post"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Post updated",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Post"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Post": {
        "type": "object",
        "properties": {
          "title": {
            "type": "string"
          },
          "content": {
            "type": "string"
          },
          "status": {
            "type": "string"
          }
        }
      }
    }
  }
}

Change the Authentication type to Bearer Token and paste your saved token.

Now ,Test the integration by sending a request through chat or click here

that’s it!
for any problems or feedback, don’t hesitate to share.

[iAli]

[PaulBellow]

Great write-up. I’m sure many will find this useful. Thanks for sharing with us.

ETA: Probably not too much different to set-up on an NGINX box… other than the .htaccess

[iAli]

• GPT’s JSON request has a token limit of 1000 tokens.

[tony.griffy]

I think I need something like this for Joomla 4 because I cannot get my module to connect to the api or assistant ID

[dmalex]

This seems like a way to access WP API from GPTs, but I’m curious how difficult it would be to go other way around - create WP Plugin for custom GPT? There are plugins for generic GPT, but what about custom (public or not) GPTs?

[iAli]

if you want to create WP plugin so you don’t need to GPT’s
just use OpenAI API
GPT’s is more easier way

but what about custom (public or not) GPTs?

i didn’t understand

[dmalex]

There are WP plugins to embed ChatGPT functionality into your web site, like Chatbot ChatGPT for WordPress – WordPress plugin | WordPress.org but if you need to access custom GPTs you’re out of luck.

[richyg]

This was completely new to me so I didn’t understand and hit a couple of hurdles;

1. I was using 2FA on the wp username / password I was using so realised I needed to create a different account just for this. I used the Author role.

2. I’ve never posted this way through an API or postman so I didn’t understand that in the 2nd post variation I needed to edit the body to include the content of the post. I ended up using this:
   {
   “title”: “hello”,
   “content”: “for test”,
   “status”: “publish”
   }