What API does opencode support?

what api does it support?

OpenCode is designed to be provider-agnostic, supporting a wide range of AI models and protocols. Based on the source code and documentation, it supports the following APIs and integrations:

###1. LLM Provider APIs

OpenCode integrates with major AI providers, primarily using the Vercel AI SDK (@ai-sdk). Supported providers include:

• Anthropic: Full support for Claude models (Claude 3.5 Sonnet, Opus, Haiku, and upcoming versions).
• OpenAI: Support for GPT-4o, GPT-4, GPT-3.5, and reasoning models (o1, o3).
• Google: Support for Gemini models (1.5 Pro, 1.5 Flash) via both Google Generative AI and Vertex AI.
• Azure OpenAI: Dedicated support for Azure-hosted instances.
• AWS Bedrock: Support for models hosted on Bedrock (specifically Anthropic models).
• OpenAI-Compatible APIs: You can connect to any provider that follows the OpenAI API specification (e.g., DeepSeek, Groq, Perplexity) or local servers like Ollama, LM Studio, and vLLM.

###2. OpenCode Zen

OpenCode provides its own curated gateway called OpenCode Zen. It allows users to:

• Access a variety of models (Claude, GPT, Gemini, etc.) using a single API key.
• Benefit from optimized pricing and tested/verified model configurations specifically for coding tasks.

###3. Model Context Protocol (MCP)

OpenCode has extensive support for the Model Context Protocol (MCP), allowing you to extend the agent's capabilities with external tools:

• Local MCP Servers: Run tools locally via command execution (e.g., npx, python).
• Remote MCP Servers: Connect to tools hosted via HTTPS.
• OAuth Support: Handles authentication for remote MCP servers that require it.
• Tool/Resource Integration: MCP tools and resources are automatically registered and available to the LLM.

###4. Developer & System APIs

• Language Server Protocol (LSP): Built-in support for LSPs to provide the agent with deep code intelligence (definitions, references, etc.).
• Internal REST API: The project follows a client/server architecture. The server (opencode serve) exposes a comprehensive REST API (defined in packages/sdk/openapi.json) for managing sessions, tools, MCP servers, and more.
• Claude Code Compatibility: It supports conventions from Anthropic's Claude Code, such as .claude/skills and CLAUDE.md configuration files.

###5. Other Gateways

The codebase also contains configurations for several other AI gateways:

• Cloudflare AI Gateway
• Vercel AI Gateway
• SAP AI Core
• GitLab Duo (via Anthropic proxy)