GPU-Bridge MCP Server

26 GPU-powered AI services as MCP tools — LLMs, image generation, audio, video, embeddings & more.
x402 native for autonomous agents: pay per request on-chain with USDC on Base L2. No API keys. No accounts.

What is GPU-Bridge?

GPU-Bridge is the first GPU inference API with native x402 support — the open payment protocol that allows AI agents to autonomously pay for compute with USDC on Base L2. No API keys, no accounts, no human intervention required.

This MCP server exposes all 26 GPU-Bridge services as Model Context Protocol tools, giving Claude (and any MCP-compatible AI) direct access to GPU inference for images, audio, video, and language tasks.

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🚀 Install in Claude Desktop (2 minutes)

1. Get your API key (or use x402 for autonomous agents)

Visit gpubridge.xyz and grab a free API key, or use the x402 protocol for keyless agent payments.

2. Add to claude_desktop_config.json

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "gpu-bridge": {
      "command": "npx",
      "args": ["-y", "@gpu-bridge/mcp-server"],
      "env": {
        "GPUBRIDGE_API_KEY": "your_api_key_here"
      }
    }
  }
}

3. Restart Claude Desktop

That's it. Claude now has access to 26 GPU-powered AI services.

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🛠️ MCP Tools

gpu_run

Run any GPU-Bridge service. The primary tool for executing AI tasks.

Parameters:
  service  (string)  — Service ID (e.g., "llm-4090", "flux-schnell", "whisper-l4")
  input    (object)  — Service-specific input parameters
  options  (object)  — Optional: priority, timeout, payment_method

Example: Generate an image with FLUX Schnell

{
  "service": "flux-schnell",
  "input": {
    "prompt": "A futuristic city at night, neon lights reflecting on wet streets",
    "width": 1024,
    "height": 1024,
    "steps": 4
  }
}

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gpu_catalog

Get the full catalog of available GPU-Bridge services with pricing and capabilities.

Parameters:
  category  (string, optional)  — Filter by: "llm", "image", "audio", "video", "embedding", "vision"

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gpu_estimate

Estimate cost and latency before running a service.

Parameters:
  service  (string)  — Service ID
  input    (object)  — Input parameters to estimate

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gpu_status

Check GPU-Bridge API status and service availability.

Parameters: none

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gpu_balance

Check your current GPU-Bridge balance (API key or x402 wallet).

Parameters:
  address  (string, optional)  — x402 wallet address (if using x402 payments)

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📋 26 Available Services

🤖 Language Models (LLMs)

Service ID	Model	GPU	Notes
llm-4090	Llama 3.1 70B	RTX 4090	Fast, general purpose
llm-a100	Llama 3.1 405B	A100	Maximum capability
llm-l4	Mistral 7B	L4	Ultra-fast, low cost
code-4090	DeepSeek Coder 33B	RTX 4090	Code generation
llm-stream	Llama 3.1 70B	RTX 4090	Streaming responses

🖼️ Image Generation

Service ID	Model	GPU	Notes
flux-schnell	FLUX.1 Schnell	A100	Fast, 4-step generation
flux-dev	FLUX.1 Dev	A100	High quality
sdxl-4090	Stable Diffusion XL	RTX 4090	Versatile
sd35-l4	Stable Diffusion 3.5	L4	Latest SD model
img2img-4090	SDXL img2img	RTX 4090	Image-to-image

👁️ Vision & Image Analysis

Service ID	Model	GPU	Notes
llava-4090	LLaVA 1.6 34B	RTX 4090	Visual Q&A
ocr-l4	Surya OCR	L4	Text extraction
rembg-l4	RemBG	L4	Background removal
caption-4090	BLIP-2	RTX 4090	Image captioning

🎤 Speech-to-Text (STT)

Service ID	Model	GPU	Notes
whisper-l4	Whisper Large v3	L4	Fast transcription
whisper-a100	Whisper Large v3	A100	High accuracy
diarize-l4	WhisperX	L4	Speaker diarization

🗣️ Text-to-Speech (TTS)

Service ID	Model	GPU	Notes
tts-l4	XTTS v2	L4	Voice cloning
tts-fast	Kokoro TTS	L4	Ultra-fast synthesis
bark-4090	Bark	RTX 4090	Expressive TTS

🎵 Audio Generation

Service ID	Model	GPU	Notes
musicgen-l4	MusicGen Large	L4	Music generation
audiogen-l4	AudioGen	L4	Sound effects

📐 Embeddings

Service ID	Model	GPU	Notes
embed-l4	BGE-M3	L4	Multilingual embeddings
embed-code	CodeBERT	L4	Code embeddings

🎬 Video

Service ID	Model	GPU	Notes
animatediff	AnimateDiff	A100	Text-to-video
video-enhance	ESRGAN	L4	Video upscaling

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🤖 x402: For Autonomous AI Agents

GPU-Bridge is the first GPU inference API to support the x402 payment protocol, enabling truly autonomous AI agents to pay for compute without human intervention.

How x402 Works

Agent Request → GPU-Bridge returns HTTP 402 Payment Required
      ↓
Agent pays USDC on Base L2 (gas < $0.01, settles in 2s)
      ↓
Agent retries request with payment proof
      ↓
GPU-Bridge executes and returns result

Python Example with x402

from x402.client import PaymentClient
import anthropic

# Initialize x402 client with your Base L2 wallet
client = PaymentClient(
    private_key="0x...",  # Your wallet private key
    chain="base"
)

# Call GPU-Bridge — no API key needed!
response = client.request(
    "POST",
    "https://api.gpubridge.xyz/v1/run",
    json={
        "service": "flux-schnell",
        "input": {"prompt": "A robot painting on a canvas", "steps": 4}
    }
)
# x402 client automatically handles the HTTP 402 → pay → retry flow
print(response.json())

Why Base L2?

• Gas fees: < $0.01 per transaction
• Settlement: ~2 seconds
• Native USDC: No wrapped tokens
• EVM compatible: Works with any Ethereum wallet

Use Cases for Autonomous Agents

• 🤖 AI agents that generate images/audio as part of their workflow
• 🔄 Pipelines that process thousands of requests without human oversight
• 🌐 dApps that need GPU compute on-demand
• 🧪 Research agents that run experiments 24/7

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💰 Pricing

Category	Starting From
LLMs	$0.003/1K tokens
Image Generation	$0.01/image
Speech-to-Text	$0.005/minute
Text-to-Speech	$0.005/1K chars
Embeddings	$0.0001/1K tokens

All prices in USD. x402 payments in USDC on Base L2.

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🔗 Links

• Website: gpubridge.xyz
• Docs: gpubridge.xyz/docs
• GitHub Org: github.com/gpu-bridge
• npm: @gpu-bridge/mcp-server
• Support: hello@gpubridge.xyz

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📄 License

MIT © GPU-Bridge