opencode-xai-oauth

OpenCode plugin that attaches OAuth/API-key authentication to OpenCode's built-in xai provider and adds xAI/Grok tools for text, web search, X search, TTS, image generation, and video generation.

Current release: v1.2.0.

Release notes

v1.2.0

• Adds xAI device-code OAuth for headless / remote / VPS environments in both the OpenCode auth picker and the standalone CLI (opencode-xai-oauth login --device).
• Aligns browser OAuth authorization parameters with upstream OpenCode xAI logic (nonce, plan=generic, referrer=opencode) and keeps OAuth token requests on a versioned plugin user-agent.
• Refreshes plugin-managed OAuth sessions proactively when the JWT access token is near expiry, even when the saved deadline is still in the future.
• Deduplicates concurrent plugin-managed refreshes so rotating refresh tokens are not replayed by parallel chat/tool requests.

v1.1.5

• Adds runtime chat.headers credential reload so expired OAuth tokens refresh during active xAI/Grok chat use without restarting OpenCode.
• Preserves OpenCode-managed xAI auth when this plugin has no reloadable OAuth/API-key credentials.
• Fails closed when an expired OAuth refresh fails instead of silently reusing stale plugin-managed credentials.
• Keeps package, CLI, and request user-agent version metadata aligned for release diagnostics.

v1.1.4

• Adds Biome/Ultracite linting and formatting configuration.
• Adds lint, lint:fix, and format scripts for local development.
• Adds GitHub Actions CI for frozen install, lint, typecheck, tests, and build.
• Keeps the v1.1.3 OAuth refresh/storage fixes intact after resolving PR #1 against current main.

v1.1.3

• Stores OAuth credentials in the OpenCode config area by default: ~/.config/opencode/xai-oauth/auth.json.
• Preserves compatibility with the previous ~/.config/opencode-xai-oauth/auth.json location when the new file is absent.
• Keeps OPENCODE_XAI_OAUTH_AUTH_FILE as the highest-priority custom auth-file override.
• Refreshes expired OAuth credentials before returning xAI provider credentials to avoid stale Grok sessions.
• Adds regression coverage for OAuth refresh and auth-file path behavior.

Unofficial / Use at your own risk

⚠️ Experimental project. Uses consumer OAuth for personal use. Not affiliated with or endorsed by xAI. Use the official xAI API for production.

This is an unofficial community plugin and is not affiliated with, endorsed by, or supported by xAI. Use it at your own risk. You are responsible for reviewing and complying with the applicable xAI terms, policies, account rules, and API/service documentation before using OAuth, API keys, Grok, X Search, web search, image generation, or TTS through this plugin.

Relevant xAI terms may change over time. Start with xAI's Terms of Service: https://x.ai/legal/terms-of-service

This project does not provide legal advice and does not guarantee that any particular use of this plugin complies with xAI's Terms of Service, API terms, X terms, or other applicable policies.

What it provides

• auth hook attaches OAuth/API-key login methods to the existing OpenCode xai provider, so opencode auth login uses the normal xAI provider instead of creating a separate xai-oauth provider.
• Does not override OpenCode's built-in xai provider/model adapter; this avoids adapter mismatches such as responses is not a function.
• Adds Grok thinking metadata to the built-in xai provider. grok-4.3 exposes only xAI-supported reasoning effort variants: low, medium, and high.
• Marks grok-4.20-reasoning as reasoning-capable without sending unsupported reasoning_effort request parameters for that model.
• shell.env hook injects XAI_API_KEY/XAI_BASE_URL into tool shells when credentials are available.
• Custom OpenCode tools:
  • xai_status
  • xai_generate_text
  • xai_web_search
  • xai_x_search
  • xai_image_generate
  • xai_tts
  • xai_video_generate

Supported features in v1.2.0

| Area | What works | Notes | | --- | --- | --- | | OpenCode auth | Browser OAuth, headless device-code OAuth, and API-key fallback for provider xai | The plugin attaches to the existing xAI provider. | | Grok chat/provider use | Uses OpenCode's built-in xAI adapter | The plugin only patches auth/config/params, not the provider adapter. | | Grok thinking variants | low, medium, high for grok-4.3 | Only xAI-supported reasoning effort values are exposed. | | Grok 4.20 reasoning | Model is marked reasoning-capable | reasoning_effort is intentionally not sent for grok-4.20-reasoning. | | Text generation tool | xai_generate_text | Uses xAI Responses API. | | Web search tool | xai_web_search | Uses xAI server-side web_search. | | X search tool | xai_x_search | Supports allowed/excluded handles, date bounds, and media-understanding flags. | | Image generation tool | xai_image_generate | Calls xAI image generation endpoint. | | TTS tool | xai_tts | Returns base64 audio in tool output. | | Video generation tool | xai_video_generate | Calls xAI /videos/generations (async submit + poll); returns URL when ready. Text-to-video and image-to-video supported. | | Shell integration | XAI_API_KEY and XAI_BASE_URL injection | Available after credentials resolve. |

References used

• OpenCode plugin docs: plugins are TS/JS modules exporting plugin functions and can register custom tools with tool().
• pi-xai-oauth: OAuth discovery, PKCE, localhost callback, xAI client id/scope, and ~/.grok/auth.json compatibility ideas.
• Hermes Agent x_search_tool.py / xai_http.py: credential preference, xAI /responses usage, X-search handle normalization, response/citation extraction.

Installation

Via npm (recommended for end users)

Add the package to your OpenCode configuration (~/.config/opencode/opencode.json or per-project opencode.json):

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-xai-oauth"]
}

OpenCode automatically installs and loads npm plugins using Bun on startup (cached under ~/.cache/opencode/node_modules/).

Local development / from source

git clone https://github.com/islee23520/opencode-xai-oauth.git ~/.config/opencode/plugins/opencode-xai-oauth
cd ~/.config/opencode/plugins/opencode-xai-oauth
bun install
bun run build   # produces dist/ used by the package entry points

Restart OpenCode (or the TUI) after changes during development.

CLI tool

After npm install -g opencode-xai-oauth (or from source with bun link):

opencode-xai-oauth login
opencode-xai-oauth login --device
opencode-xai-oauth status

For one-off use: npx opencode-xai-oauth login (requires Bun in PATH for the current CLI build).

Authenticate

OAuth:

opencode-xai-oauth login
opencode-xai-oauth login --device   # headless / remote / VPS flow
# or during local development:
bun run src/cli.ts login
bun run src/cli.ts login --device

OAuth tokens are stored under the OpenCode config area by default:

~/.config/opencode/xai-oauth/auth.json

Existing installs with the previous ~/.config/opencode-xai-oauth/auth.json file keep working; the plugin reads that legacy file when the new OpenCode config file is absent. To force a custom path, set OPENCODE_XAI_OAUTH_AUTH_FILE.

API key fallback:

export XAI_API_KEY=xai-...

Check status:

opencode-xai-oauth status

Skill-like OpenCode commands

The plugin also injects command definitions through the config hook, and this repo's local OpenCode config includes matching markdown commands under ~/.config/opencode/commands/ for reliable TUI discovery:

| Command | Maps to tool | Purpose | | --- | --- | --- | | /xai-status | xai_status | Check credential availability without exposing secrets. | | /xai-text | xai_generate_text | Generate text with Grok. | | /xai-web-search | xai_web_search | Search the live web through xAI Responses API. | | /xai-x-search | xai_x_search | Search X/Twitter through xAI Responses API. | | /xai-image | xai_image_generate | Generate images with Grok Imagine. Images are saved locally + shown as rich popups via OpenTUI. | | /xai-tts | xai_tts | Generate speech audio and return base64 output. | | /xai-video | xai_video_generate | Generate videos (text-to-video, image-to-video, or with reference images). Saved locally + shown in OpenTUI popups. |

Examples:

/xai-web-search latest xAI model news
/xai-x-search recent posts from @xai
/xai-image tiny minimalist blue dot icon on white background
/xai-tts hello from Grok
/xai-video a serene mountain lake at sunrise with slow camera pan, cinematic lighting

Tool notes

• xai_x_search uses xAI Responses API with the server-side x_search tool. It supports allowed/excluded handles, date bounds, and image/video understanding flags.
• xai_web_search uses the server-side web_search tool.
• xai_image_generate calls /images/generations; default model is grok-imagine-image, with optional resolution (1k / 2k) and response_format (url or b64_json).
  • Generated images (both URL and base64 responses) are automatically saved to .opencode/artifacts/ and returned as attachments (with correct MIME) so OpenCode's OpenTUI-powered UI can display them in rich popups/previews. Supports n > 1 for multiple images.
• xai_tts calls /tts and returns base64 audio in the tool output; default voice is eve, language is auto, and codec is mp3.
• xai_video_generate calls /videos/generations (modeled on Hermes XAIVideoGenProvider), polls until ready. Supports:
  • image_url — classic image-to-video
  • reference_image_urls — array of up to 7 reference images (for style/character consistency)
  • Videos (and reference-guided videos) are downloaded locally to .opencode/artifacts/ and attached as video/mp4 so OpenCode's OpenTUI UI renders them in a proper media popup/player.

Endpoint/model names can change on xAI's side; pass explicit model arguments if your account exposes different names.

Grok thinking mode

The plugin patches OpenCode config metadata for the existing xai provider instead of replacing the provider adapter. For grok-4.3, OpenCode variants are mapped as follows. The plugin intentionally exposes only xAI-supported reasoning effort values, and writes both reasoningEffort and reasoning_effort into chat params for compatibility with OpenCode/xAI transport paths:

| OpenCode variant | xAI reasoning effort | | --- | --- | | low | low | | medium | medium | | high | high |

grok-4.20-reasoning is marked as a reasoning model, but the plugin intentionally does not send reasoning_effort for it because xAI documents that parameter as unsupported for grok-4.20.

Development

bun install
bun run lint
bun test
bun run typecheck
bun run build