How to prevent Axios from encoding my request parameters?

You can use a custom param serializer as follows:

axios.get('https://foobar.com/api', {  paramsSerializer: function(params) {    var result = '';    // Build the query string     return result;  }});

paramsSerializer can be set at the instance level:

var instance = axios.create({ paramsSerializer: function(params) { /* ... */ } })

or at the global level:

axios.defaults.paramsSerializer = function(params) { /* ... */ };

Another option is to directly add the api key to the URL:

axios.get('https://foobar.com/api?api_key=' + key);

You can add additional parameters using the `params' config option:

axios.get('https://foobar.com/api?api_key=' + key, {  params: {    foo: 'bar'  }});

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