Claude API key — how to get and use it in 2026

According to Yandex.Wordstat, the "claude api key" cluster gets 2,413 monthly searches, "api ключ claude" adds 464, and "claude api ключ" contributes another ~150. Total ~3,000 monthly searches for the commercial intent "get an API key for Claude". This is the hottest landing page for leads to /pricing.

A Claude API key is the main technical artifact for developers. With it you get access to Opus 4.8, Sonnet 4.6, Haiku 4.5, and fable-5 through a single endpoint. One key works in Claude Code, Cursor, Python SDK, Node.js SDK, Open WebUI, OpenClaw, LiteRouter — everywhere.

In this article — a landing-style guide: 3 ways to get an API key, step-by-step for each, how to use the key in 7+ tools, security, and FAQ.

What is a Claude API key

A Claude API key is a unique string in the format sk-ant-… (from Anthropic) or sk-bf-… (from LiteAI) that authorizes requests to the Claude API.

What you can do with an API key:

• Send requests to Claude from your own code (Python, Node.js, Go, Ruby, PHP, Java).
• Use Claude in Cursor, Claude Code, Cline, Continue, aider, Open WebUI.
• Build your own AI agents and bots on top of Claude.
• Connect Claude to enterprise systems through MCP servers.
• Use the 1M-token context window (Sonnet 4.6, fable-5).

A key is not a subscription. You pay only for the tokens you actually use. There is no fixed monthly fee.

3 ways to get a Claude API key

Method 1: Anthropic direct (does not work from Russia)

The official route — register at console.anthropic.com, confirm email, link a bank card, get the key in Settings → API Keys.

Requirements:

• Email.
• Foreign bank card (Visa/Mastercard outside Russia).
• Sometimes — phone verification through a foreign number.

For RU developers this does not work: Russian cards are not accepted, foreign phone is often required.

Method 2: OpenRouter (via crypto or foreign card)

OpenRouter is an LLM API aggregator. You can get a key after registration + topping up your balance.

Pros: 400+ models through one key, including Claude. Cons: payment via Stripe (doesn't work with RU cards) or Coinbase Commerce (crypto, minimum $50).

Method 3: LiteAI (in RUB, in 30 seconds, no VPN)

The most practical way for Russia. LiteAI is an Anthropic proxy for Russian developers.

Step 1. Open liteai.tech/pricing.

Step 2. Pick a package:

• 1M tokens — 30 ₽ — for testing (20–30 sessions with Opus 4.8).
• 5M tokens — 150 ₽ — for occasional work (1 week of active use).
• 100M tokens — 2,000 ₽ — for production (1 month of Claude Code).
• 10M tokens (fable-5) — 5,000 ₽ — for long context.

Step 3. Pay via YooKassa (SBP, RU card) or Bitbanker (USDT TRC-20/ERC-20).

Step 4. Within 30 seconds LiteAI sends the key to your email and duplicates it in the Telegram bot @liteaitech_bot.

Step 5. A key in the format sk-bf-… is ready to use. Balance doesn't expire until depleted.

Step-by-step LiteAI guide

Step 1. Go to liteai.tech/pricing

Open liteai.tech/pricing. You'll see 4 packages priced in rubles. Pick the one that fits your volume and click "Buy".

Step 2. Pay via YooKassa

LiteAI accepts:

• SBP (Russian fast-payment system) — via QR code or your banking app. Fastest.
• RU card — Visa/Mastercard/MIR from Russian banks.
• USDT via Bitbanker — for crypto. Minimum ~30 ₽ equivalent.

After payment YooKassa redirects you back to LiteAI.

Step 3. Get the key

The sk-bf-… key arrives two ways:

1. Email — at the address you provided during payment. Within 1–2 minutes.
2. Telegram bot @liteaitech_bot — instantly, plus you can see balance and request history there.

Step 4. Store the key safely

Where NOT to store:

• In code that's committed to a public git repo.
• In Notion / Google Docs / Slack in plaintext.
• In Telegram messages without secret chat.

Where you CAN store:

• In environment variables (~/.bashrc, ~/.zshrc, ~/.claude/settings.json).
• In .env files added to .gitignore.
• In a password manager (1Password, Bitwarden, KeePass).
• In your team's secret manager (HashiCorp Vault, AWS Secrets Manager, Doppler).

How to use the API key in 7+ tools

Claude Code CLI

export ANTHROPIC_BASE_URL="https://api.liteai.tech/anthropic"
export ANTHROPIC_AUTH_TOKEN="sk-bf-..."
export ANTHROPIC_MODEL="claude-opus-4-8"
claude

Details — in «Claude Code with API key» and «Claude Code on Windows».

Cursor AI

In Settings → Models → Override OpenAI Base URL: https://api.liteai.tech/v1, API Key: sk-bf-….

Details — in «Cursor AI in Russia 2026».

Claude Desktop

In claude_desktop_config.json:

{
  "mcpServers": {},
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.liteai.tech/anthropic",
    "ANTHROPIC_AUTH_TOKEN": "sk-bf-...",
    "ANTHROPIC_MODEL": "claude-opus-4-8"
  }
}

Details — in «Claude Desktop on Windows and macOS».

Python SDK (Anthropic official)

pip install anthropic

import anthropic

client = anthropic.Anthropic(
    api_key="sk-bf-...",
    base_url="https://api.liteai.tech/anthropic",
)

message = client.messages.create(
    model="claude-opus-4-8",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hi, tell me a joke about programmers"}
    ],
)

print(message.content[0].text)

Python SDK (OpenAI-compatible)

pip install openai

from openai import OpenAI

client = OpenAI(
    api_key="sk-bf-...",
    base_url="https://api.liteai.tech/v1",
)

response = client.chat.completions.create(
    model="claude-opus-4-8",
    messages=[
        {"role": "user", "content": "Hi, tell me a joke about programmers"}
    ],
)

print(response.choices[0].message.content)

Node.js SDK

npm install @anthropic-ai/sdk

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: "sk-bf-...",
  baseURL: "https://api.liteai.tech/anthropic",
});

const message = await client.messages.create({
  model: "claude-opus-4-8",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hi!" }],
});

console.log(message.content[0].text);

cURL (for testing)

curl https://api.liteai.tech/anthropic/v1/messages \
  -H "x-api-key: sk-bf-..." \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4-8",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hi!"}]
  }'

LiteAI Chat (web UI)

After buying tokens, visit chat.liteai.tech and log in by email/password. LiteAI Chat uses your sk-bf-… balance for requests. Details — in «LiteAI Chat».

Cost of the API key

Package	Price	Scenario
1M	30 ₽ ($1)	Test 20–30 sessions with Opus 4.8
5M	150 ₽ ($5)	1 week of active work
100M	2,000 ₽ ($70)	1 month of Claude Code production
10M (fable-5)	5,000 ₽ ($100)	Long context for analytics

What's included:

• All Claude models: Opus 4.8, Sonnet 4.6, Haiku 4.5, fable-5 (at a special rate).
• No request-count limits.
• No RPM limits (fair-use only to protect against abuse).
• Balance doesn't expire.
• Key works in all tools simultaneously.

API key security

5 rules:

1. Don't commit the key to git. Use .env files and .gitignore.
2. Rotate the key if leaked. Ping @liteaitech_bot — we issue a new one.
3. Don't share the key in public chats. It's your "password" to the API.
4. For production — use separate keys. For example, one key for dev, a separate one for prod.
5. Monitor spend. In @liteaitech_bot you see request history and balance. If spend is anomalous — write to support.

Comparison: Claude API key via LiteAI vs Anthropic vs OpenRouter

Parameter	LiteAI	Anthropic direct	OpenRouter
Key format	sk-bf-…	sk-ant-…	sk-or-…
Registration	Russian Telegram	Foreign card	Email + Stripe
Payment	SBP, RU card, USDT	Foreign card	Stripe / Coinbase Commerce (crypto)
Claude models	4 (Opus/Sonnet/Haiku/fable-5)	All	All
Other models	❌	❌	400+
Claude Opus 4.8 tariff	30 ₽/M flat	$3/$15	$3/$15 + 5.5% fee
Minimum package	1M / 30 ₽	$5	$5 / $50 crypto
In Russia without VPN	✅	❌	⚠️ partial
54-FZ fiscal receipt	✅	❌	❌
Support	Telegram bot 24/7	Email	Discord

FAQ

Claude API key — where to get it?

Through console.anthropic.com — but RU needs a foreign card. The easiest path for RU is via liteai.tech/pricing: register by email, pay via SBP in 30 seconds, get the sk-bf-… key by email and in the Telegram bot.

Claude API key for free?

The key itself is free. You pay only for the tokens you actually use. Through LiteAI the minimum package is 1M tokens for 30 ₽. That's enough for 20–30 test sessions with Opus 4.8.

What is the Claude API key?

A string in the format sk-ant-… (Anthropic) or sk-bf-… (LiteAI) that authorizes requests to the Claude API. With a key you can use Claude from your own code or through ready-made tools (Cursor, Claude Code, Python SDK).

Claude API key in Russia — how to get it?

Through LiteAI in 30 seconds: liteai.tech/pricing → pay via SBP → key by email and in the Telegram bot. No VPN, no foreign cards. Minimum package 1M for 30 ₽.

How much does a Claude API key cost?

Through LiteAI — 30 ₽ per 1M tokens flat for all models (Opus 4.8, Sonnet 4.6, Haiku 4.5), 500 ₽/M for fable-5. That's 9–45× cheaper than Anthropic direct.

Can I use a Claude API key for free?

The Claude.ai free tier gives access to the chat but not to the API. For the API you need a paid package (minimum 1M for 30 ₽ through LiteAI). An alternative is the OpenRouter free tier on some models (meta-llama/llama-3.3-70b:free etc.).

Claude API key for Claude Code — where to get it?

Through LiteAI. The sk-bf-… key connects to Claude Code via environment variables:

export ANTHROPIC_BASE_URL="https://api.liteai.tech/anthropic"
export ANTHROPIC_AUTH_TOKEN="sk-bf-..."
export ANTHROPIC_MODEL="claude-opus-4-8"

Details — in «Claude Code with API key».

Where do I find my Claude API key after buying LiteAI?

The key arrives by email (within 1–2 minutes after payment) and in the Telegram bot @liteaitech_bot (instantly). The bot also shows your current balance and request history.

Is the Claude API key safe?

The key itself is just an authorization string. Safety depends on how you store it. Use .env files, a password manager, secret managers. Don't commit it to git, don't share in chats.

Bottom line

A Claude API key is your "pass" into the world of Claude. One key works in:

• Claude Code (agentic CLI)
• Cursor (AI IDE)
• Claude Desktop (chat app)
• Python / Node.js SDK (your own code)
• Open WebUI, OpenClaw, LiteRouter, Cline, Continue (open-source stack)

Through LiteAI the key costs 30 ₽ per 1M tokens, paid in rubles via SBP, without VPN or foreign cards. Get it in 30 seconds at liteai.tech/pricing.