# AllTokens > Unified OpenAI-compatible API for 400+ AI models with routing and multi-provider access. ## Getting Started - [Overview](https://docs.alltokens.ru/index.md): Product overview and first steps. - [Quickstart](https://docs.alltokens.ru/quickstart.md): First request with curl or an OpenAI SDK. - [Authentication](https://docs.alltokens.ru/authentication.md): API keys and auth. - [OpenAI SDKs](https://docs.alltokens.ru/guides/openai-sdk.md): Migrate existing OpenAI-based code. ## Core Concepts - [Model selection](https://docs.alltokens.ru/concepts/models.md): `alltokens/auto` vs fixed models. - [Routing](https://docs.alltokens.ru/concepts/routing.md): Routing aliases, objectives, and filters. - [Auto router](https://docs.alltokens.ru/concepts/auto-router.md): Automatic model selection. - [Free router](https://docs.alltokens.ru/concepts/free-router.md): Free routing pool. - [Providers](https://docs.alltokens.ru/concepts/providers.md): Models vs providers. - [Parameters](https://docs.alltokens.ru/concepts/parameters.md): Core request parameters. - [Streaming](https://docs.alltokens.ru/concepts/streaming.md): Streaming responses. - [Tool calling](https://docs.alltokens.ru/concepts/tool-calling.md): Tools and function calling. - [Structured outputs](https://docs.alltokens.ru/concepts/structured-outputs.md): JSON schema outputs. - [Multimodality](https://docs.alltokens.ru/concepts/multimodality.md): Image, PDF, and audio support. ## API Reference - [API authentication](https://docs.alltokens.ru/api/authentication.md): Public API auth. - [Chat completions](https://docs.alltokens.ru/api/chat-completions.md): Main inference endpoint. - [Models catalog](https://docs.alltokens.ru/api/models.md): Available models and metadata. - [Model endpoints](https://docs.alltokens.ru/api/model-endpoints.md): Endpoint availability per model. - [Providers API](https://docs.alltokens.ru/api/providers.md): Available providers. - [Completions](https://docs.alltokens.ru/api/completions.md): Prompt-based completions. - [Embeddings](https://docs.alltokens.ru/api/embeddings.md): Vector embeddings. - [Embedding models](https://docs.alltokens.ru/api/embedding-models.md): Embedding-capable models. - [Images](https://docs.alltokens.ru/api/images.md): Image generation. - [Generation metadata](https://docs.alltokens.ru/api/generation.md): Request metadata by id. - [Route preview](https://docs.alltokens.ru/api/route-preview.md): Preview routing decisions. - [Route explain](https://docs.alltokens.ru/api/route-explain.md): Explain actual routing. - [Errors](https://docs.alltokens.ru/api/errors.md): Error codes. ## Integrations - [Cursor](https://docs.alltokens.ru/guides/cursor.md): Cursor integration. - [Claude Code](https://docs.alltokens.ru/guides/claude-code.md): Claude Code integration. - [n8n](https://docs.alltokens.ru/guides/n8n.md): n8n integration. - [LangChain](https://docs.alltokens.ru/guides/langchain.md): LangChain integration. ## Skills - [Create agent](https://alltokens.ru/skills/create-agent/SKILL.md): Build an agent with AllTokens using the OpenAI-compatible API, automatic routing, optional tools, streaming, and route inspection. - [OpenAI migration](https://alltokens.ru/skills/openai-migration/SKILL.md): Migrate an existing OpenAI-based integration to AllTokens with minimal client-side changes. ## Optional - [FAQ](https://docs.alltokens.ru/guides/faq.md): Common questions. - [Troubleshooting](https://docs.alltokens.ru/guides/troubleshooting.md): Typical problems. - [Pricing](https://alltokens.ru/pricing): Pricing. - [Dashboard](https://alltokens.ru/dashboard): Account and API keys. - [Full documentation](https://alltokens.ru/llms-full.txt): Expanded machine-readable documentation.