update-opensea-metadata.js

// Change these values
const COLLECTION_ADDRESS = "0xabc123"
const API_KEY = "b128..."
const START_ID = 1
const END_ID = 152

// Leave the below alone...
// Paste the entire file into the browser console and hit "Enter".

const delay = (ms) => new Promise(resolve => setTimeout(resolve, ms))

let id = START_ID

while (id <= END_ID) {
    await fetch(`https://api.opensea.io/api/v2/chain/ethereum/contract/${COLLECTION_ADDRESS}/nfts/${id}/refresh`, {
        "headers": {
            "accept": "*/*",
            "x-api-key": API_KEY
        },
        "method": "POST",
    })
    await delay(300)
    id++
}

update-specific-tokens.js

// Change these values
const COLLECTION_ADDRESS = "0xabc123"
const API_KEY = "b128..."
const IDS = [1, 2, 3]

const delay = (ms) => new Promise(resolve => setTimeout(resolve, ms))

for (const id of IDS) {
    await fetch(`https://api.opensea.io/api/v2/chain/ethereum/contract/${COLLECTION_ADDRESS}/nfts/${id}/refresh`, {
        "headers": {
            "accept": "*/*",
            "x-api-key": API_KEY
        },
        "method": "POST",
    })
    await delay(300)
}