The Developer Portal documentation page Swagger interface is injecting `servers` variable to the API call answer data.
Example:

Used OAS 3.0 document:
{
"openapi": "3.0.0",
"info": {
"title": "OAS bug test spec",
"version": "1.0.0",
"description": "OAS 3.0 spec to test 3scale SwaggerUI server section bug."
},
"paths": {
"/test": {
"get": {
"description": "Request to endpoint that will return only 'hello': 'world!'. Check for the 'servers' added section by the browser.",
"responses": {
"200": {
"description": "operacion exitosa"
},
"400": {
"description": "Bad Request"
},
"404": {
"description": "Not Found"
},
"500": {
"description": "Internal Server Error"
}
}
}
}
},
"components": {
"securitySchemes": {
"api-key": {
"type": "apiKey",
"description": "Debe ingresar la api key asignada, si no la tiene, solicitela mediante mesa de ayuda, https://sipub.api.coordinador.cl/{backend}/{funcion}?user_key={APIKey}",
"name": "user_key",
"in": "query"
}
}
},
"security": [
{
"api-key": []
}
]
}