The Steam Trading API is an advanced solution for trading game items without needing a traditional Steam Trading Bot. This API facilitates the creation of platforms akin to Skinport, Skinbaron, or other marketplaces, as well as instant skin buy/sell services.
You don't need a node trade bot, this tradeoffer api will help your marketplace, Trading sites or another idea out.
B2C (Business-to-Customer, someone calls bot-to-customer)
P2P Concept (Peer-to-Peer, sometimes referred to as Player-to-Player)
How does Buff, Buff.163 or Buff.market do it? They use an app where users authenticate via a webview browser. Buff then retrieves the steamloginsecure cookie from this webview browser.
What can I do? You have options: develop an app similar to Buff, create a browser extension, or use our API solely for confirmation, which is our recommended approach given Steam's frequent updates that can render other solutions obsolete.
The Simple Solution: The receiver sends the trade offer themselves, and the seller accepts it themselves. You only need to use the /trade/confirmation API to confirm the trade afterward. For this, you require only the steamcommunitywebapikey from your 'seller,' for instance, to facilitate instant money payout. If the seller doesn’t share the webapikey with you, confirmation must be done manually; if they do share it, you can confirm instantly. This is an effective solution that avoids hacks and tricks."
steamloginsecure: Retrieve the steamloginsecure cookie from steamcommunity.com. If you prefer, you can send this cookie encrypted using AES – first, you need to set up your AES key at steamwebapi.com/aes/setup. Alternatively, you can send it in raw format, though we recommend encryption for enhanced security. Be aware that Steam has implemented many restrictions in recent years; with the cookie alone, you cannot send items without TOTP. This means that while our API can send, cancel, decline, or accept offers, you will still need to confirm them on your mobile device. We are exploring solutions for mobile device confirmation and plan to provide an open-source solution in the future. Consequently, you will have the option to choose either API confirmation or the open-source solution, depending on your preference and trust in our API.
You can find our Endpoints under this link, under the "tradeoffer" part.