How to get Claude API key on Claude

beginner 8 min read Updated 2026-03-18

Quick Answer

To get a Claude API key, create an Anthropic account at console.anthropic.com, verify your email, add payment details, and generate an API key from the API Keys section. The process takes about 5-10 minutes and requires account verification.

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Prerequisites

Active email account
Valid payment method
Anthropic account
Basic understanding of APIs

Step-by-Step Instructions

Visit Anthropic Console

Navigate to console.anthropic.com in your web browser. Click on the Sign Up button if you don't have an account, or Sign In if you already have one. Enter your email address and create a secure password.

Use a business email if available, as it may help with verification processes

Verify Your Email Address

Check your email inbox for a verification message from Anthropic. Click the Verify Email link in the email. If you don't see the email, check your spam folder and wait a few minutes before requesting a new verification email.

Email verification is required before you can access API features

Complete Account Setup

After email verification, log into the Anthropic Console. Complete your profile by providing your full name, organization name (if applicable), and intended use case for the API. Accept the terms of service and privacy policy.

Add Payment Information

Navigate to the Billing section in the left sidebar. Click Add Payment Method and enter your credit card details. Anthropic requires payment information even for free tier usage. Set up billing alerts to monitor your usage.

Start with a low billing limit to avoid unexpected charges while testing

Access API Keys Section

In the Anthropic Console dashboard, click on API Keys in the left navigation menu. You'll see an overview of your current API keys and usage limits. Click the Create Key or + New Key button.

You can create multiple API keys for different projects or environments

Generate Your API Key

In the Create API Key dialog, enter a descriptive name for your key (e.g., "My Project API Key"). Select the appropriate permissions and rate limits if available. Click Create Key to generate your new API key.

Use descriptive names to easily identify keys later

Copy and Secure Your API Key

Your new API key will be displayed only once. Copy the key immediately using the Copy button. Store it securely in a password manager or environment variables. The key format will look like: sk-ant-api03-...

Never share your API key publicly or commit it to version control

Test Your API Key

Verify your API key works by making a test request. Use the provided code examples in the console or test with a simple curl command:

curl -X POST https://api.anthropic.com/v1/messages \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json"

Start with simple test requests to ensure everything is working correctly

Common Issues & Troubleshooting

Email verification not received

Check your spam folder, ensure you entered the correct email address, and try requesting a new verification email from the console. Contact support if the issue persists after 30 minutes.

Payment method declined

Verify your card details are correct and that international transactions are enabled. Try using a different payment method or contact your bank. Some prepaid cards may not be accepted.

API key not working in requests

Ensure you're using the correct header format: x-api-key: YOUR_API_KEY. Check that your account has sufficient credits and that you're making requests to the correct endpoint URL.

Cannot access API Keys section

Verify your email is confirmed and payment method is added. Some features require account verification which can take 24-48 hours. Try logging out and back in, or contact Anthropic support.

Prices mentioned in this guide are pulled from current plan data and may change. Always verify on the official Claude website before purchasing.

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