OpenAPI Schema issue. Not able to access

I am trying to build a schema with my coinbase api, but I keep running into an issue:

openapi: 3.0.0
info:
  title: Coinbase API Integration
  description: An API specification for interacting with Coinbase for cryptocurrency portfolio data.
  version: 1.0.0
servers:
  - url: https://api.coinbase.com/v2
    description: Coinbase API
paths:
  /portfolio:
    get:
      operationId: getPortfolio
      summary: Fetch portfolio data from Coinbase
      responses:
        '200':
          description: Portfolio data retrieved
          content:
            application/json:
              schema:
                type: object
                properties:
                  assets:
                    type: array
                    items:
                      type: object
                      properties:
                        currency:
                          type: string
                        balance:
                          type: string
                        value:
                          type: number
                  totalValue:
                    type: number
                required:
                  - assets
                  - totalValue
        '404':
          description: Portfolio not found

Error message

[debug] Calling HTTP endpoint

{
  "domain": "api.coinbase.com",
  "method": "get",
  "path": "/portfolio",
  "operation": "getPortfolio",
  "operation_hash": "e00bdc5d936059850fc70b9069ff57b55c362114",
  "is_consequential": false,
  "params": {}
}

[debug] Calling HTTP endpoint

{
  "domain": "api.coinbase.com",
  "method": "get",
  "path": "/portfolio",
  "operation": "getPortfolio",
  "operation_hash": "e00bdc5d936059850fc70b9069ff57b55c362114",
  "is_consequential": false,
  "params": {}
}

[debug] Response received

{
  "response_data": "404 page not found\n",
  "status_code": 404,
  "action_id": "g-8d08c286a41a0ed5eb35fc2f32174f20dbf0d4e6"
}

Error talking to

It seems there was an issue with accessing the Coinbase API, as the request resulted in a "404 page not found" error. This could be due to various reasons such as connectivity issues, changes in the API endpoint, or other technical difficulties. Unfortunately, I'm unable to retrieve the portfolio information at this time. Is there anything else I can assist you with?