Server

The opencode serve command runs a headless HTTP server that exposes an OpenAPI endpoint that an opencode client can use.

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Usage

opencode serve [--port <number>] [--hostname <string>] [--cors <origin>]

Options

Flag	Description	Default
--port	Port to listen on	4096
--hostname	Hostname to listen on	127.0.0.1
--mdns	Enable mDNS discovery	false
--mdns-domain	Custom domain name for mDNS service	opencode.local
--cors	Additional browser origins to allow	[]

--cors can be passed multiple times:

opencode serve --cors http://localhost:5173 --cors https://app.example.com

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Authentication

Set OPENCODE_SERVER_PASSWORD to protect the server with HTTP basic auth. The username defaults to opencode, or set OPENCODE_SERVER_USERNAME to override it. This applies to both opencode serve and opencode web.

OPENCODE_SERVER_PASSWORD=your-password opencode serve

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How it works

When you run opencode it starts a TUI and a server. Where the TUI is the client that talks to the server. The server exposes an OpenAPI 3.1 spec endpoint. This endpoint is also used to generate an SDK.

Tip

Use the opencode server to interact with opencode programmatically.

This architecture lets opencode support multiple clients and allows you to interact with opencode programmatically.

You can run opencode serve to start a standalone server. If you have the opencode TUI running, opencode serve will start a new server.

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Connect to an existing server

When you start the TUI it randomly assigns a port and hostname. You can instead pass in the --hostname and --port flags. Then use this to connect to its server.

The /tui endpoint can be used to drive the TUI through the server. For example, you can prefill or run a prompt. This setup is used by the OpenCode IDE plugins.

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Spec

The server publishes an OpenAPI 3.1 spec that can be viewed at:

http://<hostname>:<port>/doc

For example, http://localhost:4096/doc. Use the spec to generate clients or inspect request and response types. Or view it in a Swagger explorer.

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APIs

The opencode server exposes the following APIs.

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Global

Method	Path	Description	Response
GET	/global/health	Get server health and version	{ healthy: true, version: string }
GET	/global/event	Get global events (SSE stream)	Event stream

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Project

Method	Path	Description	Response
GET	/project	List all projects	Project[]
GET	/project/current	Get the current project	Project

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Path & VCS

Method	Path	Description	Response
GET	/path	Get the current path	Path
GET	/vcs	Get VCS info for the current project	VcsInfo

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Instance

Method	Path	Description	Response
POST	/instance/dispose	Dispose the current instance	boolean

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Config

Method	Path	Description	Response
GET	/config	Get config info	Config
PATCH	/config	Update config	Config
GET	/config/providers	List providers and default models	{ providers: Provider[], default: { [key: string]: string } }

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Provider

Method	Path	Description	Response
GET	/provider	List all providers	{ all: Provider[], default: {...}, connected: string[] }
GET	/provider/auth	Get provider authentication methods	{ [providerID: string]: ProviderAuthMethod[] }
POST	/provider/{id}/oauth/authorize	Authorize a provider using OAuth	ProviderAuthAuthorization
POST	/provider/{id}/oauth/callback	Handle OAuth callback for a provider	boolean

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Sessions

Method	Path	Description	Notes
GET	/session	List all sessions	Returns Session[]
POST	/session	Create a new session	body: { parentID?, title? }, returns Session
GET	/session/status	Get session status for all sessions	Returns { [sessionID: string]: SessionStatus }
GET	/session/:id	Get session details	Returns Session
DELETE	/session/:id	Delete a session and all its data	Returns boolean
PATCH	/session/:id	Update session properties	body: { title? }, returns Session
GET	/session/:id/children	Get a session’s child sessions	Returns Session[]
GET	/session/:id/todo	Get the todo list for a session	Returns Todo[]
POST	/session/:id/init	Analyze app and create AGENTS.md	body: { messageID, providerID, modelID }, returns boolean
POST	/session/:id/fork	Fork an existing session at a message	body: { messageID? }, returns Session
POST	/session/:id/abort	Abort a running session	Returns boolean
POST	/session/:id/share	Share a session	Returns Session
DELETE	/session/:id/share	Unshare a session	Returns Session
GET	/session/:id/diff	Get the diff for this session	query: messageID?, returns FileDiff[]
POST	/session/:id/summarize	Summarize the session	body: { providerID, modelID }, returns boolean
POST	/session/:id/revert	Revert a message	body: { messageID, partID? }, returns boolean
POST	/session/:id/unrevert	Restore all reverted messages	Returns boolean
POST	/session/:id/permissions/:permissionID	Respond to a permission request	body: { response, remember? }, returns boolean

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Messages

Method	Path	Description	Notes
GET	/session/:id/message	List messages in a session	query: limit?, returns { info: Message, parts: Part[]}[]
POST	/session/:id/message	Send a message and wait for response	body: { messageID?, model?, agent?, noReply?, system?, tools?, parts }, returns { info: Message, parts: Part[]}
GET	/session/:id/message/:messageID	Get message details	Returns { info: Message, parts: Part[]}
POST	/session/:id/prompt_async	Send a message asynchronously (no wait)	body: same as /session/:id/message, returns 204 No Content
POST	/session/:id/command	Execute a slash command	body: { messageID?, agent?, model?, command, arguments }, returns { info: Message, parts: Part[]}
POST	/session/:id/shell	Run a shell command	body: { agent, model?, command }, returns { info: Message, parts: Part[]}

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Commands

Method	Path	Description	Response
GET	/command	List all commands	Command[]

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Files

Method	Path	Description	Response