opencode-mcp

An MCP (Model Context Protocol) server that lets any MCP host — Claude Code, Codex, Cursor, etc. — drive anOpenCodeinstance and delegate work to its subagents — so orchestrator models like Opus or Fable can hand off tasks to the other models OpenCode exposes.

RequiresNode.js 18+andOpenCodeinstalled and configured (opencodemust be on yourPATH, with at least one provider/model set up) — this server spawns and drives OpenCode instances.

claude mcp add opencode -- npx -y mcp-server-opencode

codex mcp add opencode -- npx -y mcp-server-opencode

SeeInstallationfor manual config, and from-source options.

- Node.js 18+
- OpenCodeinstalled and configured (opencodemust be on yourPATH, with at least one provider/model set up) — this server spawns and drives OpenCode instances.

The package is published asmcp-server-opencode. No cloning or building needed — point your MCP host atnpx:

claude mcp add opencode -- npx -y mcp-server-opencode

{ "mcpServers": { "opencode": { "command": "npx", "args": ["-y", "mcp-server-opencode"] } } }

ForCodex, add the server to~/.codex/config.toml:

[mcp_servers.opencode] command = "npx" args = ["-y", "mcp-server-opencode"]

Or install it globally and use the binary directly:

{ "mcpServers": { "opencode": { "command": "opencode-mcp" } } }

git clone https://github.com/alejandro-technology/opencode-mcp.git cd opencode-mcp pnpm install pnpm build

Then point your MCP host at the built entrypoint:

{ "mcpServers": { "opencode": { "command": "node", "args": ["/path/to/opencode-mcp/build/src/index.js"] } } }

Restart your MCP host after editing the config; theopencode_tools should appear in its tool list.

{ "mcpServers": { "opencode": { "command": "node", "args": ["/path/to/opencode-mcp/build/src/index.js"], "env": { "MCP_TOOL_TIMEOUT": "1200000" } } } }

{ "mcpServers": { "opencode": { "command": "node", "args": [ "/path/to/opencode-mcp/build/src/index.js", "MCP_TOOL_TIMEOUT=1200000" ] } } }

src/ ├── index.ts # MCP server entrypoint (stdio transport, shutdown handlers) └── modules/ ├── tools/ # One file per MCP tool, registered in index.ts ├── prompts/ # One file per MCP prompt, registered in index.ts └── shared/ # Cross-tool infrastructure ├── server-registry.ts # Tracks running OpenCode servers; killAllServers() on shutdown ├── task-registry.ts # Maps task_id → OpenCode server + session ├── opencode-client.ts # Builds SDK clients from the registries ├── config.ts # MCP_TOOL_TIMEOUT resolution (env var / CLI arg) └── mcp-result.ts # jsonResult / jsonError MCP output helpers

Each module ships with a.test.tsVitest suite under the paralleltests/tree mirroringsrc/.

pnpm install pnpm dev # runs the server through the MCP Inspector (tsx, no build needed)

pnpm test # vitest run pnpm test:coverage # vitest run --coverage pnpm lint # biome check pnpm lint:write # biome check --write pnpm build # clean tsc build to ./build (also the typecheck)

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