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How to get your Anthropic API key (3 steps)

Pritak Patel
Head of Technical Services
@Merge

Anthropic, an AI safety and research company, offers a family of AI models (dubbed “Claude”) that can help your team analyze and interpret large sets of data, streamline tedious recruiting processes, troubleshoot customer issues, and much more.

That said, you can get even more value from Anthropic by integrating its models with your internal applications or your product. Once you have, you can build intelligent workflows that can fundamentally transform how your teams or clients carry out their day-to-day work.

As a first step to building these integrations, you’ll need to access your Anthropic API key. We’ll help you do just that below!

Step 1: Create an account

Sign up for an account here.

Screenshot for creating an account with Claude

Related: How to get your ChatGPT API key

Step 2: Generate an API Key 

After creating an account, click your Profile in the top right corner and select API Keys

Accessing API keys in Anthropic

On the next screen, click Create Key and type in a name for your key. Hit Create Key after naming your key.

Creating your API key in Anthropic

IMPORTANT: Copy your key and store it in a safe location. You won’t be able to re-access the key in the future.

Message for adding an API key successfully

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Step 3: Set up billing

From the same screen in Step 2, select Plans & Billing in the left navigation.

On this screen, you have 2 options:

  • If you recently created a new account, you may have credits to test the API without setting up a paid plan. To claim the credits, you’ll need to provide your phone number. If you go this route, you can skip the remainder of this guide.
  • If you don’t have credits, you’ll need to upgrade to a paid plan. You can see information about plans if you hit Select Plan.
How to access plans and billing in Anthropic

Here’s an overview of the plans:

Screenshot of Account Plans in Claude

If you select the Scale plan, you’ll be prompted to talk to Anthropic’s sales team and the rest of this guide won’t apply. For this guide, we’ll continue with the Build plan.

After continuing in the flow by selecting Build, you’ll be prompted to enter a credit card and purchase an initial amount of credits. You can also set up an auto-reload of credits on this page.

Screenshot of setting up billing

After hitting Purchase Credits, you’ll be taken to a dashboard, which you can use to manage your usage and billing going forward.

A screenshot of where you can manage usage and billing in Anthropic

Related: A guide to creating API tokens in Llama

Other key considerations for building to Anthropic’s API

Before building to Anthropic’s API, it’s worth familiarizing yourself with the following.

Pricing

Anthropic currently prices their API usage with a prepaid credit system. Depending on your usage of the API, you may utilize a different number of credits per call. To get the latest information you can see their docs here.

Claude 3's pricing

Rate limits

Anthropic’s rate limit depends on your usage tier and is currently measured in requests per minute, tokens per minute, and tokens per day. If you exceed any of the rate limits you will get a 429 error—“Your account has hit a rate limit."

More information on usage tiers and rate limits can be found here

Errors to look out for

Anthropic does a great job of listing all of the possible error codes you can encounter while using their API. Learn more here.

Common errors from making API calls to Anthropic's endpoints

Final thoughts

Your product integration requirements likely extend far beyond Anthropic.

If you need to integrate your product with hundreds of 3rd-party applications that fall under popular software categories, like CRM, HRIS, ATS, or file storage, you can simply connect to one of Merge’s Unified APIs.

Merge also provides comprehensive integration maintenance support and management tooling for your customer-facing teams—all but ensuring that your integrations perform at a high level over time. 

You can learn more about Merge by scheduling a demo with one of our integration experts.

“It was the same process, go talk to their team, figure out their API. It was taking a lot of time. And then before we knew it, there was a laundry list of HR integrations being requested for our prospects and customers.”

Name
Position
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Pritak Patel
Head of Technical Services
@Merge

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But Merge isn’t just a Unified 
API product. Merge is an integration platform to also manage customer integrations.  gradient text
But Merge isn’t just a Unified 
API product. Merge is an integration platform to also manage customer integrations.  gradient text
But Merge isn’t just a Unified 
API product. Merge is an integration platform to also manage customer integrations.  gradient text