@elizaos/plugin-openrouter

This plugin provides integration with various models available through the OpenRouter API via the ElizaOS platform.

Usage

Add the plugin to your character configuration:

"plugins": ["@elizaos/plugin-openrouter"]

Configuration

The plugin requires the OpenRouter API key and can be configured via environment variables or character settings.

Character Settings Example:

"settings": {
  "OPENROUTER_API_KEY": "your_openrouter_api_key",
  "OPENROUTER_BASE_URL": "https://openrouter.ai/api/v1", // Optional: Default is OpenRouter endpoint
  "OPENROUTER_SMALL_MODEL": "google/gemini-flash", // Optional: Overrides default small model
  "OPENROUTER_LARGE_MODEL": "google/gemini-pro", // Optional: Overrides default large model
  "OPENROUTER_IMAGE_MODEL": "x-ai/grok-2-vision-1212", // Optional: Overrides default image model
    "OPENROUTER_IMAGE_GENERATION_MODEL": "google/gemini-2.5-flash-image-preview", // Optional: Overrides default image generation model
  "OPENROUTER_BROWSER_BASE_URL": "https://your-proxy.example.com/openrouter"
  // Fallbacks if specific OPENROUTER models are not set
  "SMALL_MODEL": "google/gemini-flash",
  "LARGE_MODEL": "google/gemini-pro",
  "IMAGE_MODEL": "x-ai/grok-2-vision-1212",
  "IMAGE_GENERATION_MODEL": "google/gemini-2.5-flash-image-preview"
}

.env File Example:

OPENROUTER_API_KEY=your_openrouter_api_key
# Optional overrides:
OPENROUTER_BASE_URL=https://openrouter.ai/api/v1
OPENROUTER_SMALL_MODEL=google/gemini-flash
OPENROUTER_LARGE_MODEL=google/gemini-pro
OPENROUTER_IMAGE_MODEL=x-ai/grok-2-vision-1212
OPENROUTER_IMAGE_GENERATION_MODEL=google/gemini-2.5-flash-image-preview
# Browser proxy (frontend builds only)
OPENROUTER_BROWSER_BASE_URL=https://your-proxy.example.com/openrouter
# Fallbacks if specific OPENROUTER models are not set
SMALL_MODEL=google/gemini-flash
LARGE_MODEL=google/gemini-pro
IMAGE_MODEL=x-ai/grok-2-vision-1212
IMAGE_GENERATION_MODEL=google/gemini-2.5-flash-image-preview

Configuration Options

• OPENROUTER_API_KEY (required): Your OpenRouter API key.
• OPENROUTER_BASE_URL: Custom API endpoint (default: https://openrouter.ai/api/v1).
• OPENROUTER_BROWSER_BASE_URL: Browser-only base URL to a proxy endpoint that forwards requests to OpenRouter without exposing keys.

Browser mode and proxying

When bundled for the browser, this plugin avoids sending Authorization headers. Set OPENROUTER_BROWSER_BASE_URL to a server-side proxy you control that injects the OpenRouter API key. This prevents exposing secrets in frontend builds.

Example minimal proxy (Express):

import express from 'express';
import fetch from 'node-fetch';

const app = express();
app.use(express.json());

app.post('/openrouter/*', async (req, res) => {
  const url = `https://openrouter.ai/api/v1/${req.params[0]}`;
  const r = await fetch(url, {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${process.env.OPENROUTER_API_KEY}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(req.body),
  });
  res.status(r.status).set(Object.fromEntries(r.headers)).send(await r.text());
});

app.listen(3000);

• OPENROUTER_SMALL_MODEL: Specific model to use for TEXT_SMALL and OBJECT_SMALL. Overrides SMALL_MODEL if set.
• OPENROUTER_LARGE_MODEL: Specific model to use for TEXT_LARGE and OBJECT_LARGE. Overrides LARGE_MODEL if set.
• OPENROUTER_IMAGE_MODEL: Specific model to use for IMAGE_DESCRIPTION. Overrides IMAGE_MODEL if set.
• OPENROUTER_IMAGE_GENERATION_MODEL: Specific model to use for IMAGE generation. Overrides IMAGE_GENERATION_MODEL if set.
• OPENROUTER_AUTO_CLEANUP_IMAGES: Whether to automatically delete generated images after 30 seconds (default: "false"). Set to "true" to enable auto-cleanup.
• SMALL_MODEL: Fallback model for small tasks (default: "google/gemini-2.0-flash-001"). Used if OPENROUTER_SMALL_MODEL is not set.
• LARGE_MODEL: Fallback model for large tasks (default: "openai/gpt-4.1-nano"). Used if OPENROUTER_LARGE_MODEL is not set.
• IMAGE_MODEL: Fallback model for image analysis (default: "x-ai/grok-2-vision-1212"). Used if OPENROUTER_IMAGE_MODEL is not set.
• IMAGE_GENERATION_MODEL: Fallback model for image generation (default: "google/gemini-2.5-flash-image-preview"). Used if OPENROUTER_IMAGE_GENERATION_MODEL is not set.

Provided Models

The plugin currently provides these model types:

• TEXT_SMALL: Optimized for fast, cost-effective text generation using the configured small model.
• TEXT_LARGE: For more complex text generation tasks requiring larger models, using the configured large model.
• OBJECT_SMALL: Generates structured JSON objects based on a prompt, using the configured small model.
• OBJECT_LARGE: Generates structured JSON objects based on a prompt, using the configured large model.
• IMAGE_DESCRIPTION: Analyzes images and provides descriptive text and titles, using the configured image model.
• IMAGE: Generates images from text prompts using the configured image generation model (e.g., Gemini 2.5 Flash Image Preview).

Note: Features like Audio Transcription and Embeddings are not currently implemented in this specific OpenRouter plugin.