opencode-cursor-auth

Cursor authentication + local Cursor Agent backend for OpenCode.

This plugin lets you use cursor-agent as an OpenAI-compatible provider inside OpenCode (no Cursor IDE required).

Requirements

- cursor-agent installed (curl -fsSL https://cursor.com/install | bash)
- Logged in once (the plugin can trigger cursor-agent login)

Install

Add the plugin to your OpenCode config (~/.config/opencode/opencode.json):

``json
{
"plugin": [
"opencode-openai-codex-auth@4.1.0",
"opencode-gemini-auth",
"opencode-cursor-auth@1.0.9"
],
"provider": {
"cursor": {
"npm": "@ai-sdk/openai-compatible",
"name": "Cursor Agent (local)",
"options": {
"baseURL": "http://127.0.0.1:32123/v1"
},
"models": {
"auto": { "name": "Cursor Agent Auto" },
"gpt-5": { "name": "Cursor Agent GPT-5 (alias → gpt-5.2)" },
"gpt-5.2": { "name": "Cursor Agent GPT-5.2" },
"gpt-5.1": { "name": "Cursor Agent GPT-5.1" },
"gpt-5.1-codex": { "name": "Cursor Agent GPT-5.1 Codex" },
"sonnet-4": { "name": "Cursor Agent Sonnet 4 (alias → sonnet-4.5)" },
"sonnet-4.5": { "name": "Cursor Agent Sonnet 4.5" },
"sonnet-4.5-thinking": { "name": "Cursor Agent Sonnet 4.5 Thinking" }
}
}
}
}
`

Login

`bash
opencode auth login
`

- Select provider: Other
- Provider id: cursor
- Method: Login via cursor-agent (opens browser)

Run

`bash
opencode run "decime hola" --model cursor/gpt-5
opencode run "decime hola" --model cursor/gpt-5.2
`

How It Works

- On startup, the plugin starts a local HTTP proxy on 127.0.0.1:32123.
- OpenCode uses @ai-sdk/openai-compatible against http://127.0.0.1:32123/v1.
- The proxy translates /v1/chat/completions into a cursor-agent CLI call.

Current Limitations

This integration is intentionally minimal and works well for plain chat/completions, but it does not currently provide:

- OpenCode tool-calling (LSP/TODO/tools): cursor-agent is a CLI agent and does not speak OpenAI tool-calls, so OpenCode can’t route tool calls.
- Token usage / cost accounting: cursor-agent does not expose token counts per request in a way OpenCode can consume.
- “Thinking” UI sections: we only stream assistant text; there’s no separate reasoning payload.

Troubleshooting

- Unauthorized: cursor-agent failed.: your model name is not supported by your cursor-agent. Try cursor/gpt-5.2 or cursor/auto.
- Unable to connect: another opencode instance might not have the proxy running, or the port 32123 is taken by something else. Try closing other opencode sessions, or change the port in both the plugin and opencode.json`.

License

ISC