DeepSeek

Use DeepSeek’s chat and reasoning models with your own key.

Overview

The developer platform is separate from the DeepSeek chat website; the two logins are not interchangeable.

1
Go to platform.deepseek.com and sign up (email is verified; turn on two-factor if offered).
2
Open Top up and add a balance. DeepSeek bills against deposited money, so the balance is your ceiling.
3
Open API keys and choose Create new API key. Name it.
4
Copy the key. It is shown once.

Cost. Prepaid, per token. New accounts may be given a small starting balance; it is spent first.

1
Open Loom, then Providers in the menu, and choose Add provider.
2
Pick DeepSeek (the search box finds it).
3
Fill in the fields in the table below.
4
Choose Connect. Loom checks the key and says how many models it found. If it cannot check, it says so, and you can Save anyway and try a message.
5
Open the model chip below the message box and pick a model.

Field in Loom	What to put	Needed
API key	Paste the key you copied. Create one at platform.deepseek.com → API keys.	Yes
Endpoint	`https://api.deepseek.com`	Pre-filled
Name	Anything you like. It is shown in the model picker	Optional

Appears in Loom as	DeepSeek
Sign-in	Your key, sent as `Authorization: Bearer`
Models	Loom fetches the list from your account
Tools (connectors, search)	Yes
Photos	Some models only
PDFs	No

Reasoning models write their thinking separately. Loom keeps it out of the reply and hands it back during tool use, which DeepSeek requires.

What you see	What to do
401, “authentication fails”	The key is wrong or has a stray space. Paste it again.
402, “insufficient balance”	Top up on the platform. A key with no balance still signs in, which makes this look like a bug.