# LLM Documentation for Nexus

Nexus - The AI Router for Enterprises
Nexus aggregates Model Context Protocol (MCP) servers and provides seamless LLM routing for AI agents.

## Docs
- [Installation](https://nexusrouter.com/docs/installation.md): Learn how to install Nexus using various methods
- [Configuration](https://nexusrouter.com/docs/configuration.md): Configure Nexus using TOML configuration files
- [Configuration - Server](https://nexusrouter.com/docs/configuration/server.md): Configure Nexus server settings, security, and authentication
- [Configuration - Server - Core Settings](https://nexusrouter.com/docs/configuration/server/core.md): Essential server configuration for Nexus
- [Configuration - Server - OAuth2 Authentication](https://nexusrouter.com/docs/configuration/server/oauth2.md): Secure your Nexus instance with OAuth2 and JWT validation
- [Configuration - Server - Rate Limiting](https://nexusrouter.com/docs/configuration/server/rate-limiting.md): Protect your Nexus server from abuse with configurable rate limits
- [Configuration - Server - Client Identification](https://nexusrouter.com/docs/configuration/server/client-identification.md): Enable user tracking and tiered access control in Nexus
- [Configuration - Server - CORS](https://nexusrouter.com/docs/configuration/server/cors.md): Configure Cross-Origin Resource Sharing for browser-based clients
- [Configuration - Server - CSRF Protection](https://nexusrouter.com/docs/configuration/server/csrf.md): Protect against Cross-Site Request Forgery attacks
- [Configuration - LLM](https://nexusrouter.com/docs/configuration/llm.md): Configure LLM routing to unify multiple AI model providers
- [Configuration - LLM - Provider Configuration](https://nexusrouter.com/docs/configuration/llm/providers.md): Configure AI model providers for unified access through Nexus
- [Configuration - LLM - Model Management](https://nexusrouter.com/docs/configuration/llm/models.md): Configure models and create custom aliases
- [Configuration - LLM - Token Rate Limiting](https://nexusrouter.com/docs/configuration/llm/rate-limiting.md): Control token consumption with sophisticated per-user and per-model limits
- [Configuration - LLM - Token Forwarding](https://nexusrouter.com/docs/configuration/llm/token-forwarding.md): Allow users to provide their own API keys for LLM providers
- [Configuration - LLM - Header Rules](https://nexusrouter.com/docs/configuration/llm/header-rules.md): Advanced header transformation and management for LLM providers
- [Configuration - MCP](https://nexusrouter.com/docs/configuration/mcp.md): Configure Model Context Protocol servers for AI tool integration
- [Configuration - MCP - Servers](https://nexusrouter.com/docs/configuration/mcp/servers.md): Configure MCP servers for tool integration
- [Configuration - MCP - Authentication](https://nexusrouter.com/docs/configuration/mcp/authentication.md): Secure MCP servers with authentication methods
- [Configuration - MCP - TLS Configuration](https://nexusrouter.com/docs/configuration/mcp/tls.md): Configure secure TLS connections for MCP servers
- [Configuration - MCP - Rate Limiting](https://nexusrouter.com/docs/configuration/mcp/rate-limiting.md): Configure rate limits for MCP servers and tools
- [Configuration - MCP - Role-Based Access Control](https://nexusrouter.com/docs/configuration/mcp/rbac.md): Configure fine-grained access control for MCP tools based on user groups
- [Configuration - Telemetry](https://nexusrouter.com/docs/configuration/telemetry.md): Configure OpenTelemetry metrics, traces, and logs for observability
- [Usage](https://nexusrouter.com/docs/usage.md): Learn how to use Nexus APIs and integrate with your applications
- [Usage - LLM client integration](https://nexusrouter.com/docs/usage/llm-api.md): How to use the LLM API with examples and client libraries
- [Usage - MCP integration with AI Agents](https://nexusrouter.com/docs/usage/mcp-integration.md): Connect Nexus to Claude Desktop, Claude Code, VSCode, and other MCP-compatible AI agents
- [Usage - Using Nexus with Claude Code](https://nexusrouter.com/docs/usage/claude-code-integration.md): Configure Claude Code to use Nexus as a proxy for Anthropic API calls, and as an MCP aggregator
- [Usage - Using Nexus with OpenAI Codex](https://nexusrouter.com/docs/usage/openai-codex-integration.md): Configure OpenAI Codex CLI to use Nexus as a proxy for OpenAI API calls
- [Telemetry](https://nexusrouter.com/docs/telemetry.md): Monitor and observe Nexus with OpenTelemetry metrics, traces, and logs
- [Telemetry - Metrics](https://nexusrouter.com/docs/telemetry/metrics.md): Monitor Nexus with comprehensive OpenTelemetry metrics
- [Telemetry - Traces](https://nexusrouter.com/docs/telemetry/traces.md): Distributed tracing spans exported by Nexus for request flow visualization
- [Telemetry - Logs](https://nexusrouter.com/docs/telemetry/logs.md): Structured application logs with OpenTelemetry correlation
- [Troubleshooting](https://nexusrouter.com/docs/troubleshooting.md): Debug common issues and resolve problems with Nexus
- [Best Practices](https://nexusrouter.com/docs/best-practices.md): Recommended patterns and practices for production Nexus deployments


## Blog
- [User Identification and LLM Rate Limits](https://nexusrouter.com/changelog/announcing-user-identification-and-llm-rate-limits): Token-based rate limiting for LLM providers with fine-grained control over AI resource consumption
- [AWS Bedrock, Tool calling, Helm chart, and Header Rules](https://nexusrouter.com/changelog/aws-bedrock-llm-tools-and-header-rules): Unified access to foundation models, function calling across providers, and fine-grained header control
- [Anthropic Protocol Support, OpenAI Codex Integration, and Enhanced Security](https://nexusrouter.com/changelog/claude-code-and-openai-codex-support): Native Anthropic API support, validated OpenAI Codex integration, and hardened Docker images with Chainguard Wolfi
- [Introducing Nexus - the Open-Source AI Router to aggregate, govern, and secure your AI stack](https://nexusrouter.com/blog/introducing-nexus-the-open-source-ai-router): Nexus serves as a central hub that aggregates MCP servers while providing intelligent LLM routing capabilities.
- [MCP Role-Based Access Control for Enterprise Security](https://nexusrouter.com/changelog/mcp-rbac-and-reliability-improvements): Fine-grained MCP server access control with RBAC, seamless client identification integration, and critical reliability improvements
- [Complete OpenTelemetry Observability - Metrics, Traces, and Logs](https://nexusrouter.com/changelog/opentelemetry-observability-metrics-traces-logs): Full observability stack with OpenTelemetry integration for comprehensive monitoring, distributed tracing, and centralized logging
- [Securing Your AI Stack: How Nexus Addresses Critical MCP Security Challenges](https://nexusrouter.com/blog/securing-your-ai-stack-how-nexus-addresses-critical-mcp-security-challenges): Learn how Nexus can help mitigate MCP security challenges.