How to get over the limit of OpenSea Api? - api

Question

I am trying to use OpenSea API and I noticed that I need to set a limit before retrieving assets
https://docs.opensea.io/reference/getting-assets
I figured I can use the offset to navigate through all the items, even though that's tedious. But the problem is offset itself has a limit, so are assets beyond the max offset inaccessible ?
I read that you that the API is "rate-limited" without an API key, so I assume that related to the number of requests you can make in a certain time period, am I correct about that? Or does it lift the limit of returned assets ? The documentation isn't clear about that https://docs.opensea.io/reference/api-overview
What can I do to navigate through all the assets ?

Answer 1

May be late answering this one, but I had a similar problem. You can only access a limited number (50) assets if using the API.
Using the API referenced on the page you linked to, you could do a for loop to grab assets of a collection in a range. For example, using Python:
import requests
def get_asset(collection_address:str, asset_id:str) ->str:
url = "https://api.opensea.io/api/v1/assets?token_ids="+asset_id+"&asset_contract_address="+collection_address+"&order_direction=desc&offset=0&limit=20"
response = requests.request("GET", url)
asset_details = response.text
return asset_details
#using the Dogepound collection with address 0x73883743dd9894bd2d43e975465b50df8d3af3b2
collection_address = '0x73883743dd9894bd2d43e975465b50df8d3af3b2'
asset_ids = [i for i in range(10)]
assets = [get_asset(collection_address, str(i)) for i in asset_ids]
print(assets)
For me, I actually used Typescript because that's what opensea use for their SDK (https://github.com/ProjectOpenSea/opensea-js). It's a bit more versatile and allows you to automate making offers, purchases and sales on assets. Anyway here's how you can get all of those assets in Typescript (you may need a few more dependencies than those referenced below):
import * as Web3 from 'web3'
import { OpenSeaPort, Network } from 'opensea-js'
// This example provider won't let you make transactions, only read-only calls:
const provider = new Web3.providers.HttpProvider('https://mainnet.infura.io')
const seaport = new OpenSeaPort(provider, {
networkName: Network.Main
})
async function getAssets(seaport: OpenSeaPort, collectionAddress: string, tokenIDRange:number) {
let assets:Array<any> = []
for (let i=0; i<tokenIDRange; i++) {
try {
let results = await client.api.getAsset({'collectionAddress':collectionAddress, 'tokenId': i,})
assets = [...assets, results ]
} catch (err) {
console.log(err)
}
}
return Promise.all(assets)
}
(async () => {
const seaport = connectToOpenSea();
const assets = await getAssets(seaport, collectionAddress, 10);
//Do something with assets
})();
The final thing to be aware of is that their API is rate limited, like you said. So you can only make a certain number of calls to their API within a time frame before you get a pesky 429 error. So either find a way of bypassing rate limits or put a timer on your requests.