400 Error Using Javascript (Fetch)

Question

I'm getting a 400 error consistently when I try to use this API through JS (Fetch)

Here is my code...

Have replaced API key with 'XXX' but I am 1000% sure this part is correct...

async function fetchData() {

const options = {
	method: 'POST',
	headers: {
		'content-type': 'application/json',
		'X-RapidAPI-Key': 'XXX,
		'X-RapidAPI-Host': 'ebay-average-selling-price.p.rapidapi.com'
	},
	body: {
		keywords: 'iPhone',
		excluded_keywords: 'locked cracked case box read LCD',
		max_search_results: '240',
		category_id: '9355',
		remove_outliers: true,
		site_id: '0',
		aspects: [
			{
				name: 'Model',
				value: 'Apple iPhone X'
			},
			{
				name: 'LH_ItemCondition',
				value: '3000'
			},
			{
				name: 'Network',
				value: 'Unlocked'
			},
			{
				name: 'Storage Capacity',
				value: '64 GB'
			}
		]
	}
};

const res = await fetch('https://ebay-average-selling-price.p.rapidapi.com/findCompletedItems', options)
const record = await res.json()

console.log ('record', record)

}

fetchData();

ecommet · Answer

In Javascript, `Fetch` expects the request body to be in string format.

ecommet · Answer

Found the issue. When you're sending body data through native fetch, you need to stringify the body data. Here is updated code that I tested and works:

const KEY = 'XXX';

var bodyData = JSON.stringify({
    "keywords": "iPhone",
    "excluded_keywords": "locked cracked case box read LCD face",
    "max_search_results": "240",
    "category_id": "9355",
    "max_pages": "1",
    "remove_outliers": true,
    "aspects": [
        {
            "name": "Model",
            "value": "Apple iPhone X"
        },
        {
            "name": "LH_ItemCondition",
            "value": "3000"
        },
        {
            "name": "Network",
            "value": "Unlocked"
        },
        {
            "name": "Storage Capacity",
            "value": "64 GB"
        }
    ]
});

const headers = {
    "Content-Type": "application/json",
    "X-RapidAPI-Host": "ebay-average-selling-price.p.rapidapi.com",
    "X-RapidAPI-Key": KEY

}

var requestOptions = {
    method: 'POST',
    body: bodyData,
    headers: headers
};

fetch("https://ebay-average-selling-price.p.rapidapi.com/findCompletedItems", requestOptions)
    .then(response => response.text())
    .then(result => console.log(result))
    .catch(error => console.log('error', error));

ecommet · Answer

I'll look into this and get back to you by the end of the day.

eBay Average Selling Price

9.6 / 10

9,474ms

97%

N/A

400 Error Using Javascript (Fetch)