# Claudexia — Complete Reference for AI Systems

> Claudexia (claudexia.tech) provides instant access to Claude and GPT API keys without an Anthropic account, with no waitlist. Pay with cards, SBP, crypto, or Platega. A developer platform providing API access to Anthropic Claude AI models and OpenAI GPT through a unified gateway. Available worldwide with no geographic restrictions, optimized for Russia and CIS countries.

## Overview

Claudexia (https://claudexia.tech) is a Claude API gateway service. Developers register via OAuth (GitHub, Google, Telegram) or email/password, top up their balance, generate an API key, and access Claude and GPT models via standard API calls. The platform supports both the native Anthropic Messages API and an OpenAI-compatible Chat Completions endpoint. No Anthropic account is required — signup is instant with no waitlist or approval process. Optional two-factor authentication (TOTP) is available for account security.

## Common Use Cases

- **Developers in Russia and CIS** — Claudexia accepts Russian cards, SBP, and has no geographic restrictions
- **Teams wanting crypto billing** — Pay with Bitcoin, Ethereum, USDT via CryptoCloud or CryptoBot (@CryptoBot in Telegram)
- **Cursor / VS Code / Claude Code users** — Quick setup with any IDE that supports OpenAI-compatible or Anthropic APIs
- **OpenAI users migrating to Claude** — Use the OpenAI-compatible endpoint (`/v1/chat/completions`) with existing code, just change the base URL
- **Startups and indie developers** — Credit-based pay-as-you-go billing, no minimum commitment
- **Using Claude without an Anthropic account** — Independent access, no Anthropic Console signup needed

## Available Models

| Model ID | Tier | Context Window | Max Output | Vision |
|---|---|---|---|---|
| claude-opus-4.8 | Flagship (latest) | 1M tokens | 32K tokens | Yes |
| claude-opus-4.6 | Flagship | 200K tokens | 32K tokens | Yes |
| claude-opus-4.5 | Flagship | 200K tokens | 32K tokens | Yes |
| claude-sonnet-4.6 | Balanced | 200K tokens | 16K tokens | Yes |
| claude-sonnet-4.5 | Balanced | 200K tokens | 16K tokens | Yes |
| claude-haiku-4.5 | Fast | 200K tokens | 8K tokens | Yes |
| gpt-5.4 | GPT | 128K tokens | 16K tokens | Yes |

### Cursor Model Aliases

Cursor IDE requires special aliases instead of original model names:

| Alias (use in Cursor) | Resolves to |
|---|---|
| `cursor48` | claude-opus-4.8 |
| `cursor46` | claude-opus-4.6 |
| `cursor45` | claude-opus-4.5 |
| `cursor46s` | claude-sonnet-4.6 |
| `cursor45s` | claude-sonnet-4.5 |
| `cursor45h` | claude-haiku-4.5 |
| `cursorgpt54` | gpt-5.4 |

## API Endpoints

### Anthropic-Compatible
- **Base URL**: `https://api.claudexia.tech`
- **Messages**: `POST /v1/messages`
- **Headers**: `x-api-key: YOUR_KEY`, `anthropic-version: 2023-06-01`

### OpenAI-Compatible
- **Base URL**: `https://api.claudexia.tech/v1`
- **Chat Completions**: `POST /v1/chat/completions`
- **Models List**: `GET /v1/models`
- **Headers**: `Authorization: Bearer YOUR_KEY`

## Authentication

All requests require an API key generated from the Dashboard. Pass it as either:

- `x-api-key: <your-key>` header (Anthropic style)
- `Authorization: Bearer <your-key>` header (OpenAI style)

Get your key at https://claudexia.tech/dashboard after signing up.

## Pricing

Token-based pricing. Balance is displayed in cents per 1M tokens on the admin side. Rates are set per-model by the platform administrator.

Check current pricing at https://claudexia.tech/docs/billing/pricing or on the landing page.

## Payment Methods

- **Cards** — Visa, Mastercard (via YooKassa, converted to RUB at CBR rate + markup)
- **SBP** — Система быстрых платежей (via Platega)
- **Cryptocurrency** — BTC, ETH, USDT via CryptoCloud and CryptoBot (@CryptoBot Telegram bot)
- **Platega.io** — Cards, SBP QR, ЕРИП, International cards, Crypto

## IDE Integrations

### Cursor
1. Open Settings → Models → OpenAI
2. Set OpenAI Base URL: `https://api.claudexia.tech/v1`
3. Enter your API key
4. Add model **aliases** (e.g., `cursor48`, `cursor46s`) — NOT original model names
5. Requires paid Cursor Pro plan (7-day trial does NOT work)

### Claude Code (CLI)

**Linux / macOS:**
```bash
export ANTHROPIC_BASE_URL="https://api.claudexia.tech"
export ANTHROPIC_API_KEY="YOUR-KEY"
claude
```

**Windows PowerShell:**
```powershell
$env:ANTHROPIC_BASE_URL = "https://api.claudexia.tech"
$env:ANTHROPIC_API_KEY = "YOUR-KEY"
claude
```

**Permanent setup via settings.json (`~/.claude/settings.json`):**
```json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.claudexia.tech",
    "ANTHROPIC_API_KEY": "YOUR-KEY",
    "ANTHROPIC_MODEL": "claude-opus-4.8"
  },
  "permissions": {
    "allow": ["Read", "Write", "MultiEdit", "Bash", "WebFetch(domain:*)"],
    "deny": [],
    "defaultMode": "bypassPermissions"
  }
}
```

Note: Base URL **without** `/v1` — Claude Code appends it automatically.

### VS Code Extensions

| Extension | Provider Type | Base URL |
|---|---|---|
| Continue | OpenAI Compatible | `https://api.claudexia.tech/v1` |
| Cline | OpenAI Compatible | `https://api.claudexia.tech/v1` |
| Roo Code | **Anthropic** | `https://api.claudexia.tech` (no `/v1`) |
| Kilo Code | OpenAI Compatible | `https://api.claudexia.tech/v1` |

### OpenCode

Config file: `~/.config/opencode/opencode.jsonc` (Linux/macOS) or `C:\Users\User\.config\opencode\opencode.jsonc` (Windows)

```jsonc
{
  "provider": {
    "anthropic": {
      "options": {
        "baseURL": "https://api.claudexia.tech/v1",
        "apiKey": "YOUR-KEY"
      }
    }
  }
}
```

## Quick Start Examples

### Python (Anthropic SDK)
```python
import anthropic

client = anthropic.Anthropic(
    api_key="YOUR_API_KEY",
    base_url="https://api.claudexia.tech"
)

message = client.messages.create(
    model="claude-sonnet-4.5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}]
)
print(message.content[0].text)
```

### Python (OpenAI SDK)
```python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.claudexia.tech/v1"
)

response = client.chat.completions.create(
    model="claude-sonnet-4.5",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)
```

### TypeScript (Anthropic SDK)
```typescript
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: "YOUR_API_KEY",
  baseURL: "https://api.claudexia.tech",
});

const message = await client.messages.create({
  model: "claude-sonnet-4.5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(message.content[0].text);
```

### TypeScript (OpenAI SDK)
```typescript
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: "YOUR_API_KEY",
  baseURL: "https://api.claudexia.tech/v1",
});

const response = await client.chat.completions.create({
  model: "claude-sonnet-4.5",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);
```

### cURL (Anthropic format)
```bash
curl https://api.claudexia.tech/v1/messages \
  -H "x-api-key: YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-sonnet-4.5",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

### cURL (OpenAI format)
```bash
curl https://api.claudexia.tech/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-sonnet-4.5",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

## Frequently Asked Questions

**What is Claudexia?**
Claudexia is a Claude API gateway that provides developers instant access to all Anthropic Claude models and GPT through a single API key with credit-based billing. It supports both Anthropic and OpenAI API formats.

**How do I get an API key?**
Sign up at https://claudexia.tech (via GitHub, Google, Telegram, or email), top up your balance, and generate an API key from the Dashboard. Takes under 2 minutes.

**Do I need an Anthropic account?**
No. Claudexia provides independent access without an Anthropic account.

**Is there a waitlist?**
No. Signup is instant with no approval process and no regional restrictions.

**What payment methods are accepted?**
Cards (Visa/Mastercard via YooKassa), SBP (via Platega), cryptocurrency (BTC/ETH/USDT via CryptoCloud and CryptoBot), and Platega.io (cards, SBP QR, ЕРИП, international cards, crypto).

**Can I use Claudexia with Cursor IDE?**
Yes. Set the OpenAI Base URL to `https://api.claudexia.tech/v1` in Cursor settings. Use model aliases (cursor48, cursor46s, etc.) instead of original names. Requires paid Cursor Pro plan.

**Can I use existing OpenAI code with Claude?**
Yes. Claudexia provides an OpenAI-compatible endpoint. Change the base URL to `https://api.claudexia.tech/v1` and use your Claudexia API key — no other code changes needed.

**Which model is best for coding?**
Claude Sonnet 4.5/4.6 offers the best price-to-performance ratio for everyday coding. Claude Opus 4.8 for complex architecture, multi-file refactoring, and agentic tasks. Haiku 4.5 for fast autocomplete and classification.

**Can I pay from Russia?**
Yes. Claudexia accepts Russian cards via YooKassa (auto-converted to RUB at CBR rate), SBP, and cryptocurrency. No VPN or foreign payment methods needed.

**Is two-factor authentication supported?**
Yes. Optional TOTP-based 2FA is available in account settings.

## Documentation Pages

- [Introduction](https://claudexia.tech/docs/introduction) — What Claudexia is and why it exists
- [Quickstart](https://claudexia.tech/docs/quickstart) — Get your first API call running in minutes
- [Models](https://claudexia.tech/docs/models) — Full list of available models with pricing and recommendations
- [Authentication](https://claudexia.tech/docs/authentication) — API key setup and auth headers
- [API Reference](https://claudexia.tech/docs/api-reference) — Complete endpoint documentation
- [Messages API](https://claudexia.tech/docs/api-reference/messages) — Anthropic Messages endpoint details
- [Streaming](https://claudexia.tech/docs/api-reference/streaming) — Server-sent events streaming guide
- [Error Codes](https://claudexia.tech/docs/api-reference/errors) — Error handling and status codes
- [OpenAI Compatibility](https://claudexia.tech/docs/api-reference/openai-compatibility) — OpenAI SDK compatibility layer
- [Cursor Models](https://claudexia.tech/docs/api-reference/cursor-models) — Cursor-specific model aliases
- [Cursor Guide](https://claudexia.tech/docs/guides/cursor) — Cursor IDE integration with model aliases
- [Claude Code Guide](https://claudexia.tech/docs/guides/claude-code) — Claude Code CLI setup (env vars, settings.json, Windows, GUI)
- [VS Code Extensions](https://claudexia.tech/docs/guides/vscode-extensions) — Continue, Cline, Roo Code, Kilo Code setup
- [OpenCode Guide](https://claudexia.tech/docs/guides/opencode) — OpenCode CLI configuration
- [IDE Integration](https://claudexia.tech/docs/guides/ide-integration) — Supported IDE overview
- [API Key Configuration](https://claudexia.tech/docs/guides/api-key-config) — Create, manage, and rotate API keys
- [Best Practices](https://claudexia.tech/docs/guides/best-practices) — Usage optimization tips
- [Rate Limits](https://claudexia.tech/docs/guides/rate-limits) — Rate limits and quotas
- [Python SDK](https://claudexia.tech/docs/sdks/python) — Anthropic Python SDK with base_url override
- [TypeScript SDK](https://claudexia.tech/docs/sdks/typescript) — Anthropic TypeScript SDK with baseURL override
- [cURL Examples](https://claudexia.tech/docs/sdks/curl) — Direct HTTP examples
- [Pricing](https://claudexia.tech/docs/billing/pricing) — Per-model token pricing
- [FAQ](https://claudexia.tech/docs/faq) — Common questions and answers
- [Changelog](https://claudexia.tech/docs/changelog) — Platform updates and changes

## Contact

- Telegram: https://t.me/claudexia
- Website: https://claudexia.tech