oh-my-opencode/src/mcp/AGENTS.md

MCP KNOWLEDGE BASE

OVERVIEW

Tier 1 of three-tier MCP system: 3 built-in remote HTTP MCPs.

Three-Tier System:

1. Built-in (this directory): websearch, context7, grep_app
2. Claude Code compat (features/claude-code-mcp-loader/): .mcp.json with ${VAR} expansion
3. Skill-embedded (features/opencode-skill-loader/): YAML frontmatter in SKILL.md

STRUCTURE

mcp/
├── index.ts        # createBuiltinMcps() factory
├── index.test.ts   # Tests
├── websearch.ts    # Exa AI / Tavily web search
├── context7.ts     # Library documentation
├── grep-app.ts     # GitHub code search
└── types.ts        # McpNameSchema

MCP SERVERS

Name	URL	Auth	Purpose
websearch	mcp.exa.ai/mcp (default) or mcp.tavily.com/mcp/	EXA_API_KEY (optional) / TAVILY_API_KEY (required)	Real-time web search
context7	mcp.context7.com/mcp	CONTEXT7_API_KEY (optional)	Library docs lookup
grep_app	mcp.grep.app	None	GitHub code search

CONFIG PATTERN

export const mcp_name = {
  type: "remote" as const,
  url: "https://...",
  enabled: true,
  oauth: false as const,
  headers?: { ... },
}

HOW TO ADD

1. Create src/mcp/my-mcp.ts with config object
2. Add conditional check in createBuiltinMcps() in index.ts
3. Add name to McpNameSchema in types.ts

NOTES

• Remote only: HTTP/SSE transport, no stdio
• Disable: Set disabled_mcps: ["name"] in config
• Exa: Default provider, works without API key
• Tavily: Requires TAVILY_API_KEY env var