No prompt limits. No broken streams. Full thinking + tool support in OpenCode. Your Cursor subscription, properly integrated.

Installation

Option A — One-line installer

curl -fsSL https://raw.githubusercontent.com/Nomadcxx/opencode-cursor/main/install.sh | bash

Add to ~/.config/opencode/opencode.json:

{
  "plugin": ["@rama_nigg/open-cursor@latest"],
  "provider": {
    "cursor-acp": {
      "name": "Cursor ACP",
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "http://127.0.0.1:32124/v1"
      },
      "models": {
        "cursor-acp/auto": { "name": "Auto" },
        "cursor-acp/composer-1.5": { "name": "Composer 1.5" },
        "cursor-acp/composer-1": { "name": "Composer 1" },
        "cursor-acp/opus-4.6-thinking": { "name": "Claude 4.6 Opus (Thinking)" },
        "cursor-acp/opus-4.6": { "name": "Claude 4.6 Opus" },
        "cursor-acp/sonnet-4.6": { "name": "Claude 4.6 Sonnet" },
        "cursor-acp/sonnet-4.6-thinking": { "name": "Claude 4.6 Sonnet (Thinking)" },
        "cursor-acp/opus-4.5": { "name": "Claude 4.5 Opus" },
        "cursor-acp/opus-4.5-thinking": { "name": "Claude 4.5 Opus (Thinking)" },
        "cursor-acp/sonnet-4.5": { "name": "Claude 4.5 Sonnet" },
        "cursor-acp/sonnet-4.5-thinking": { "name": "Claude 4.5 Sonnet (Thinking)" },
        "cursor-acp/gpt-5.4-high": { "name": "GPT-5.4 High" },
        "cursor-acp/gpt-5.4-high-fast": { "name": "GPT-5.4 High Fast" },
        "cursor-acp/gpt-5.4-xhigh": { "name": "GPT-5.4 Extra High" },
        "cursor-acp/gpt-5.4-xhigh-fast": { "name": "GPT-5.4 Extra High Fast" },
        "cursor-acp/gpt-5.4-medium": { "name": "GPT-5.4" },
        "cursor-acp/gpt-5.4-medium-fast": { "name": "GPT-5.4 Fast" },
        "cursor-acp/gpt-5.3-codex": { "name": "GPT-5.3 Codex" },
        "cursor-acp/gpt-5.3-codex-fast": { "name": "GPT-5.3 Codex Fast" },
        "cursor-acp/gpt-5.3-codex-low": { "name": "GPT-5.3 Codex Low" },
        "cursor-acp/gpt-5.3-codex-low-fast": { "name": "GPT-5.3 Codex Low Fast" },
        "cursor-acp/gpt-5.3-codex-high": { "name": "GPT-5.3 Codex High" },
        "cursor-acp/gpt-5.3-codex-high-fast": { "name": "GPT-5.3 Codex High Fast" },
        "cursor-acp/gpt-5.3-codex-xhigh": { "name": "GPT-5.3 Codex Extra High" },
        "cursor-acp/gpt-5.3-codex-xhigh-fast": { "name": "GPT-5.3 Codex Extra High Fast" },
        "cursor-acp/gpt-5.3-codex-spark-preview": { "name": "GPT-5.3 Codex Spark" },
        "cursor-acp/gpt-5.2": { "name": "GPT-5.2" },
        "cursor-acp/gpt-5.2-high": { "name": "GPT-5.2 High" },
        "cursor-acp/gpt-5.2-codex": { "name": "GPT-5.2 Codex" },
        "cursor-acp/gpt-5.2-codex-fast": { "name": "GPT-5.2 Codex Fast" },
        "cursor-acp/gpt-5.2-codex-low": { "name": "GPT-5.2 Codex Low" },
        "cursor-acp/gpt-5.2-codex-low-fast": { "name": "GPT-5.2 Codex Low Fast" },
        "cursor-acp/gpt-5.2-codex-high": { "name": "GPT-5.2 Codex High" },
        "cursor-acp/gpt-5.2-codex-high-fast": { "name": "GPT-5.2 Codex High Fast" },
        "cursor-acp/gpt-5.2-codex-xhigh": { "name": "GPT-5.2 Codex Extra High" },
        "cursor-acp/gpt-5.2-codex-xhigh-fast": { "name": "GPT-5.2 Codex Extra High Fast" },
        "cursor-acp/gpt-5.1-codex-max": { "name": "GPT-5.1 Codex Max" },
        "cursor-acp/gpt-5.1-codex-max-high": { "name": "GPT-5.1 Codex Max High" },
        "cursor-acp/gpt-5.1-codex-mini": { "name": "GPT-5.1 Codex Mini" },
        "cursor-acp/gpt-5.1-high": { "name": "GPT-5.1 High" },
        "cursor-acp/gemini-3.1-pro": { "name": "Gemini 3.1 Pro" },
        "cursor-acp/gemini-3-pro": { "name": "Gemini 3 Pro" },
        "cursor-acp/gemini-3-flash": { "name": "Gemini 3 Flash" },
        "cursor-acp/grok": { "name": "Grok" },
        "cursor-acp/kimi-k2.5": { "name": "Kimi K2.5" }
      }
    }
  }
}

Update models anytime: cursor-agent models

npm install -g @rama_nigg/open-cursor
open-cursor install

Upgrade: npm update -g @rama_nigg/open-cursor

git clone https://github.com/Nomadcxx/opencode-cursor.git
cd opencode-cursor
go build -o ./installer ./cmd/installer && ./installer

Install open-cursor for OpenCode: edit ~/.config/opencode/opencode.json, add "@rama_nigg/open-cursor@latest" to "plugin", add a "cursor-acp" provider with npm "@ai-sdk/openai-compatible" and models from `cursor-agent models` prefixed with "cursor-acp/". Auth: `cursor-agent login`. Verify: `opencode models | grep cursor-acp`.

git clone https://github.com/Nomadcxx/opencode-cursor.git && cd opencode-cursor
bun install && bun run build
ln -sf $(pwd)/dist/plugin-entry.js ~/.config/opencode/plugin/cursor-acp.js
./scripts/sync-models.sh

Add "cursor-acp" to the plugin array and reuse the provider block from Option B.

Authentication

opencode auth login   # provider id: cursor-acp
cursor-agent login    # direct

Usage

opencode run "your prompt" --model cursor-acp/auto
opencode run "your prompt" --model cursor-acp/sonnet-4.5

MCP Tool Bridge

Any MCP servers already configured in your opencode.json work automatically with cursor-acp models — no extra setup needed. The plugin discovers them at startup and injects usage instructions into the system prompt so the model calls them via cursor-agent's Shell tool.

mcptool servers                                    # list discovered servers
mcptool tools [server]                             # list available tools
mcptool call hybrid-memory memory_stats            # call a tool manually
mcptool call playwright browser_navigate '{"url":"https://example.com"}'

Any MCP server using stdio transport works. Tested with hybrid-memory, @modelcontextprotocol/server-filesystem, @playwright/mcp, and @modelcontextprotocol/server-everything.

Architecture

flowchart TB
    OC["OpenCode"] --> SDK["@ai-sdk/openai-compatible"]
    SDK -->|"POST /v1/chat/completions"| PROXY["open-cursor proxy :32124"]
    PROXY -->|"spawn per request"| AGENT["cursor-agent --output-format stream-json"]
    AGENT -->|"HTTPS"| CURSOR["Cursor API"]
    CURSOR --> AGENT

    AGENT -->|"assistant / thinking events"| SSE["SSE content chunks"]
    AGENT -->|"tool_call event"| BOUNDARY["Provider boundary (v1 default)"]
    BOUNDARY --> COMPAT["Schema compat + alias normalization"]
    COMPAT --> GUARD["Tool-loop guard"]
    GUARD -->|"emit tool_calls + finish_reason=tool_calls"| SDK
    SDK --> OC

    OC -->|"execute tool locally"| TOOLRUN["OpenCode tool runtime"]
    TOOLRUN -->|"next request includes role:tool result"| SDK
    SDK -->|"TOOL_RESULT prompt block"| AGENT

    AGENT -->|"Shell tool_call"| MCPTOOL["mcptool CLI"]
    MCPTOOL -->|"stdio"| MCP["MCP Servers"]
    MCP --> MCPTOOL
    MCPTOOL --> AGENT

Default mode: CURSOR_ACP_TOOL_LOOP_MODE=opencode. Details: docs/architecture/runtime-tool-loop.md.

Alternatives

THERE is currently not a single perfect plugin for cursor in opencode, my advice is stick with what is the LEAST worst option for you. | | open-cursor | yet-another-opencode-cursor-auth | opencode-cursor-auth | cursor-opencode-auth | | ----------------- | :------------------------: | :--------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------: | :----------------------------------------------------------------------: | | Architecture | HTTP proxy via cursor-agent | Direct Connect-RPC | HTTP proxy via cursor-agent | Direct Connect-RPC/protobuf | | Platform | Linux, macOS | Linux, macOS | Linux, macOS | macOS only (Keychain) | | Max Prompt | Unlimited (HTTP body) | Unknown | ~128KB (ARG_MAX) | Unknown | | Streaming | ✓ SSE | ✓ SSE | Undocumented | ✓ | | Error Parsing | ✓ (quota/auth/model) | ✗ | ✗ | Debug logging | | Installer | ✓ TUI + one-liner | ✗ | ✗ | ✗ | | OAuth Flow | ✓ OpenCode integration | ✓ Native | Browser login | Keychain | | Tool Calling | ✓ OpenCode-owned loop | ✓ Native | ✓ Experimental | ✗ | | MCP Bridge | ✓ mcptool CLI (any MCP server) | ✗ | ✗ | ✗ | | Stability | Stable (uses official CLI) | Experimental | Stable | Experimental | | Dependencies | bun, cursor-agent | npm | bun, cursor-agent | Node.js 18+ | | Port | 32124 | 18741 | 32123 | 4141 |

Troubleshooting

• fetch() URL is invalid → opencode auth login
• Model not responding → cursor-agent login
• Quota exceeded → cursor.com/settings
• Auth failed → CURSOR_ACP_LOG_LEVEL=debug opencode auth login cursor-acp

Debug logging: CURSOR_ACP_LOG_LEVEL=debug opencode run "your prompt" --model cursor-acp/auto

Roadmap

flowchart LR
    P1[/Stabilise/] --> P2[/MCP Bridge/] --> P3[/Simplify/] --> P4[/ACP + MCP/]

    style P1 fill:#264653,stroke:#1d3557,color:#fff
    style P2 fill:#264653,stroke:#1d3557,color:#fff
    style P3 fill:#495057,stroke:#343a40,color:#adb5bd
    style P4 fill:#495057,stroke:#343a40,color:#adb5bd

[X] Stabilise — Clean up dead code, fix test isolation [X] MCP Bridge — Bridge MCP servers into Cursor models via mcptool CLI [ ] Simplify — Rip out serialisation layers [ ] ACP + MCP — Structured protocols end-to-end

Future Architecture — Long-term direction is OpenCode -> Cursor ACP -> MCP, using official Cursor ACP as the backend. Currently deferred: Cursor ACP does not yet reliably propagate MCP servers during ACP session setup. See docs/architecture/cursor-acp-mcp-future.md.

License

BSD-3-Clause