On iPhone and iPad, the Create a key at console.anthropic.com link on the key step opens the same page.
Use Claude
Get an Anthropic API key, connect it to Resurf, and know what to check when the connection test fails.
- Key from
- console.anthropic.com
- Looks like
- sk-ant-…
- Syncs
- No, this device only
- On
- Mac, iPhone, iPad
Get a key
Claude in Resurf uses the Anthropic Console, which is separate from a Claude.ai account.
Sign in at console.anthropic.com (it opens as platform.claude.com) and open API keys under Settings.
Click Create key, name it, and choose when it expires. Copy the key: it starts with
sk-ant-and is shown in full only once.Add credit on the Billing page before you connect. Requests are paid from that balance, and the Console also lets you set a spend limit.
Connect it
Choose Settings… (⌘,) and click Providers in the sidebar.
Click Connect beside Claude.
Paste your key into API key and click Connect. Resurf sends one test request to check it.
Claude moves to the top and shows Connected.
In Resurf's Settings, turn on AI, or tap Providers if AI is already on.
Tap Claude, paste your key and tap Continue.
Resurf checks the key. Then read what will be shared with Anthropic and tap Allow.
Your first provider turns on AI features and Suggest as you capture. The test sends your key and asks Anthropic for its model list. No capture content is in it.
What it powers in Resurf
Resurf picks a Claude model for you when you connect. It writes suggestions as you capture (titles, tags, spaces and summaries), voice note titles and clean-ups, generated notes, and answers in the Assistant on Mac. If the model you pick can't see images, Resurf reads them with a vision model from Anthropic, or organizes them from their text.
- Voice transcription stays where it was. Cloud transcription is OpenAI only, so with Claude alone, voice notes are transcribed on your device.
- The key stays on this device. Claude keys don't sync, so connect Claude on each Mac, iPhone and iPad you use.
When the connection test fails
On Mac you see Could not connect to Claude. Check the API key and try again. On iPhone and iPad the test step says The key didn't work., with Back and Try again.
| Likely cause | What to do |
|---|---|
| The key is wrong or expired | A character is missing from the paste, the key was deleted in the Console, or it reached the expiry you chose when you made it. Make a new key and paste the whole thing. |
| No credit | A key is accepted without any, but requests fail with a billing error until you add credit on the Billing page. |
| A spend limit is reached | Anthropic refuses requests past the monthly limit on your organization or workspace. Raise it in the Console. |
On Mac, click Manage beside Claude and click Test to run the check again.
Questions
Does a Claude.ai subscription come with an API key?
No. Keys come from the Anthropic Console, which has its own account and credit.
Why does the Console open as platform.claude.com?
That is the Console's current address. console.anthropic.com takes you there.
Can I transcribe voice notes with Claude?
No. Cloud transcription is OpenAI only. Voice notes are transcribed on your device otherwise.