# LLMsRelay — Complete reference for AI systems

> LLMsRelay is an independent Claude API gateway for developers. It provides Anthropic Messages API and OpenAI-compatible endpoints, API keys, usage billing, and IDE integrations.

Updated: 2026-08-14

## Overview

Signup is instant and does not require an Anthropic account. Availability and model access are controlled by the API key and its group.

## API surface

- Anthropic-compatible base URL: `https://api.llmsrelay.com`
- Messages API: `POST /v1/messages`
- OpenAI-compatible base URL: `https://api.llmsrelay.com/v1`
- Chat Completions: `POST /v1/chat/completions`
- Models: `GET /v1/models`
- Health: `GET /healthz`
- Anthropic authentication: `x-api-key: YOUR_API_KEY`
- OpenAI-compatible authentication: `Authorization: Bearer YOUR_API_KEY`
- Documentation mirrors: append `.md` or `.tldr.md` to a docs URL on `llmsrelay.com`.

## Current public model catalogue

The public Claude model catalogue is returned by GET /v1/models and can be filtered by API-key group and per-key allowed-model settings.

| Model | Model ID | Context | Thinking | Key access |
| --- | --- | --- | --- | --- |
| Claude Opus 5 | `claude-opus-5` | 1M | Yes | Basic, Pro |
| Claude Fable 5 | `claude-fable-5` | 1M | Yes | Basic, Pro |
| Claude Opus 4.8 | `claude-opus-4.8` | 1M | Yes | Claude key groups |
| Claude Opus 4.7 | `claude-opus-4.7` | 1M | Yes | Claude key groups |
| Claude Opus 4.6 | `claude-opus-4.6` | 1M | Yes | Claude key groups |
| Claude Sonnet 5 | `claude-sonnet-5` | 1M | Yes | Claude key groups |
| Claude Sonnet 4.6 | `claude-sonnet-4.6` | 1M | Yes | Claude key groups |
| Claude Haiku 4.5 | `claude-haiku-4.5` | 200K | Yes | Claude key groups |

### Short aliases

| Alias | Resolves to |
| --- | --- |
| `opus` | `claude-opus-4.8` |
| `sonnet` | `claude-sonnet-4.6` |
| `haiku` | `claude-haiku-4.5` |

Basic and Pro Claude keys include the two newer public models listed with explicit Basic/Pro access. The definitive response for a specific key is always GET /v1/models.

## Plans and usage

LLMsRelay sells one-time usage packs with no recurring charge: $45 for $500 usage, $90 for $1,000, $450 for $6,000 including a fixed 20% bonus, and $900 for $13,000 including a fixed 30% bonus.

| Product | Price | Included usage |
| --- | --- | --- |
| $500 usage pack | $45 one time | $500 usage |
| $1,000 usage pack | $90 one time | $1,000 usage |
| $5,000 + 20% pack | $450 one time | $6,000 total usage |
| $10,000 + 30% pack | $900 one time | $13,000 total usage |

Payment methods and availability are shown at checkout. The platform supports card and cryptocurrency payment flows where offered.

## FAQ

**What is LLMsRelay?**
An independent Claude API gateway with Anthropic-compatible and OpenAI-compatible API surfaces.

**Which model IDs should I use?**
Use the exact IDs returned by GET /v1/models. Do not hard-code a model list in production clients.

**Do I need an Anthropic account?**
No. LLMsRelay signup and API-key management are separate from Anthropic Console.

**How does billing work?**
Usage is measured in Anthropic-equivalent terms and deducted from the balance attached to the key.

**Which usage packs are available?**
LLMsRelay offers four one-time packs: $45 for $500 usage, $90 for $1,000, $450 for $6,000 including +20%, and $900 for $13,000 including +30%.

**Can I use LLMsRelay from an IDE?**
Yes. Use the Anthropic base URL for Claude Code and Anthropic SDKs, or the /v1 OpenAI-compatible base URL for compatible clients.

## Documentation index

### Documentation hub
- [LLMsRelay Documentation](https://llmsrelay.com/docs/)

### Getting started
- [Getting Started with LLMsRelay API](https://llmsrelay.com/docs/getting-started/)
- [Authentication](https://llmsrelay.com/docs/getting-started/authentication/)
- [Introduction](https://llmsrelay.com/docs/getting-started/introduction/)
- [Models](https://llmsrelay.com/docs/getting-started/models/)
- [Quickstart](https://llmsrelay.com/docs/getting-started/quickstart/)

### API reference
- [LLMsRelay API Reference](https://llmsrelay.com/docs/api-reference/)
- [OpenAI & Codex Endpoints — API Reference](https://llmsrelay.com/docs/api-reference/codex/)
- [Cursor IDE](https://llmsrelay.com/docs/api-reference/cursor-ide/)
- [Errors](https://llmsrelay.com/docs/api-reference/errors/)
- [Messages API](https://llmsrelay.com/docs/api-reference/messages/)
- [Models Endpoint](https://llmsrelay.com/docs/api-reference/models/)
- [OpenAI Compatibility](https://llmsrelay.com/docs/api-reference/openai/)
- [API Reference Overview](https://llmsrelay.com/docs/api-reference/overview/)
- [Streaming](https://llmsrelay.com/docs/api-reference/streaming/)

### Guides
- [LLMsRelay Setup Guides](https://llmsrelay.com/docs/guides/)
- [Claude API Key Configuration — Create, Manage & Secure](https://llmsrelay.com/docs/guides/api-key-configuration/)
- [Best Practices](https://llmsrelay.com/docs/guides/best-practices/)
- [Claude Code Setup with a Custom API Gateway](https://llmsrelay.com/docs/guides/claude-code/)
- [Codex CLI & Extension Setup (OpenAI API)](https://llmsrelay.com/docs/guides/codex-cli/)
- [How to Use Claude API in Cursor IDE — 2-Minute Setup [2026]](https://llmsrelay.com/docs/guides/cursor/)
- [IDE Integration](https://llmsrelay.com/docs/guides/ide-integration/)
- [One-Prompt Setup Templates for Claude Code, Cursor, Cline, Kilo, Continue, and OpenCode](https://llmsrelay.com/docs/guides/one-prompt-setup/)
- [OpenAI-Compatible IDEs (Cline, Roo, Continue)](https://llmsrelay.com/docs/guides/openai-ides/)
- [OpenClaw Setup](https://llmsrelay.com/docs/guides/openclaw/)
- [OpenCode](https://llmsrelay.com/docs/guides/opencode/)
- [Rate Limits](https://llmsrelay.com/docs/guides/rate-limits/)
- [Earn Solana USDT with Claude API referrals — 10% claimable rewards](https://llmsrelay.com/docs/guides/referral-program/)
- [VS Code Extensions](https://llmsrelay.com/docs/guides/vscode-extensions/)

### SDKs
- [Client SDKs](https://llmsrelay.com/docs/sdks/)
- [cURL](https://llmsrelay.com/docs/sdks/curl/)
- [Python SDK](https://llmsrelay.com/docs/sdks/python/)
- [TypeScript SDK](https://llmsrelay.com/docs/sdks/typescript/)

### Billing
- [LLMsRelay Billing and Credits](https://llmsrelay.com/docs/billing/)
- [Credits](https://llmsrelay.com/docs/billing/credits/)
- [Pricing](https://llmsrelay.com/docs/billing/pricing/)

### Learn
- [Activation Time — How Access Works](https://llmsrelay.com/docs/learn/activation-time/)
- [How to Make Money with AI APIs: Reseller Guide](https://llmsrelay.com/docs/learn/ai-api-reseller/)
- [Cheapest Claude API in 2026 — Up to 91% Below Anthropic | LLMsRelay](https://llmsrelay.com/docs/learn/cheapest-claude-api/)
- [Cheapest OpenAI API — Pay-as-You-Go, No Subscription](https://llmsrelay.com/docs/learn/cheapest-openai-api/)
- [Claude 3.5 vs 4.6 — Should You Upgrade? Pricing & Migration (2026)](https://llmsrelay.com/docs/learn/claude-3-5-vs-4-6/)
- [Buy Claude API Credits with Crypto — No Credit Card Needed](https://llmsrelay.com/docs/learn/claude-api-crypto-payment/)
- [Claude API for Russia & Restricted Regions — Full Access Guide](https://llmsrelay.com/docs/learn/claude-api-for-russia/)
- [How to Use Claude API in VS Code — Extensions & Setup](https://llmsrelay.com/docs/learn/claude-api-for-vscode/)
- [Claude API Starter pack — Start Coding in 2 Minutes](https://llmsrelay.com/docs/learn/claude-api-free-trial/)
- [Claude API Gateway — Unified Access to All Claude Models](https://llmsrelay.com/docs/learn/claude-api-gateway/)
- [How to Use Claude API Key in Cursor IDE](https://llmsrelay.com/docs/learn/claude-api-key-for-cursor/)
- [Claude API Key Setup in 2 Minutes](https://llmsrelay.com/docs/learn/claude-api-quick-setup/)
- [Claude API vs Anthropic Direct — Save 91% (11×) with LLMsRelay (2026)](https://llmsrelay.com/docs/learn/claude-api-vs-direct/)
- [Get Claude API Access Instant Access — Instant Setup](https://llmsrelay.com/docs/learn/claude-api-without-waitlist/)
- [Claude Code Free — Use Claude Code Without Paying $200/month](https://llmsrelay.com/docs/learn/claude-code-free/)
- [Claude Haiku Free API — Fastest Claude Model, Starter pack](https://llmsrelay.com/docs/learn/claude-haiku-free-api/)
- [Claude Opus Free API — Try Opus 4.7 with Starter pack](https://llmsrelay.com/docs/learn/claude-opus-free-api/)
- [Claude Sonnet Free API — Sonnet 4.6 with Starter pack](https://llmsrelay.com/docs/learn/claude-sonnet-free-api/)
- [Claude API vs OpenAI API 2026 — Pricing & Coding Compared | LLMsRelay](https://llmsrelay.com/docs/learn/claude-vs-openai-api/)
- [Claude X20 Max Subscription — Max 20x and API Alternative](https://llmsrelay.com/docs/learn/claude-x20-max-subscription/)
- [Codex CLI API — Run the OpenAI API in OpenAI Codex CLI](https://llmsrelay.com/docs/learn/codex-cli-api/)
- [Use Claude in Cursor Without an Anthropic Account](https://llmsrelay.com/docs/learn/cursor-without-anthropic-account/)
- [Free Claude API Key — Get Started in 2 Minutes](https://llmsrelay.com/docs/learn/free-claude-api-key/)
- [How Billing Works](https://llmsrelay.com/docs/learn/how-billing-works/)
- [How to Buy a Claude API Key](https://llmsrelay.com/docs/learn/how-to-buy-claude-api-key/)
- [LLMsRelay vs OpenRouter — Claude-Focused vs Multi-Model Marketplace [2026]](https://llmsrelay.com/docs/learn/llmsrelay-vs-openrouter/)
- [LLMsRelay vs Portkey — Claude Gateway vs Enterprise AI Proxy [2026]](https://llmsrelay.com/docs/learn/llmsrelay-vs-portkey/)
- [LLMsRelay vs ProxyAPI — Honest 2026 Comparison [Pricing, Features, RU Payment]](https://llmsrelay.com/docs/learn/llmsrelay-vs-proxyapi/)
- [LLMsRelay vs VseLLM — Claude-Only vs Multi-Provider Gateway [2026]](https://llmsrelay.com/docs/learn/llmsrelay-vs-vsellm/)
- [OpenAI API Access — No OpenAI Account, Pay-as-You-Go](https://llmsrelay.com/docs/learn/openai-api/)
- [OpenAI-Compatible API — Drop-in /v1/chat/completions](https://llmsrelay.com/docs/learn/openai-compatible-api/)
- [OpenAI-Compatible Claude API — Use Claude with OpenAI SDK](https://llmsrelay.com/docs/learn/openai-compatible-claude-api/)
- [Claude API Pricing Explained](https://llmsrelay.com/docs/learn/pricing-explained/)
- [Support, Refunds & Assistance Policy](https://llmsrelay.com/docs/learn/refund-policy/)
- [How to Save Tokens on the Claude API — Practical Tips](https://llmsrelay.com/docs/learn/save-tokens-claude-api/)
- [LLMsRelay Regional Availability and API Access](https://llmsrelay.com/docs/learn/supported-countries/)
- [Why Choose LLMsRelay](https://llmsrelay.com/docs/learn/why-llmsrelay/)

## Machine-readable resources

- llms.txt: https://llmsrelay.com/llms.txt
- llms-full.txt: https://llmsrelay.com/llms-full.txt
- OpenAPI description: https://llmsrelay.com/openapi.json
- API catalog: https://llmsrelay.com/.well-known/api-catalog
- Sitemap: https://llmsrelay.com/sitemap.xml
- Knowledge graph: https://llmsrelay.com/knowledge-graph.jsonld

## Contact

- Telegram: https://telegram.me/claudestorestore
- Website: https://llmsrelay.com/