MCP 服务器

x402engine-mcp

MCP server providing AI agents access to 38 pay-per-call APIs (LLM, image, code, audio, crypto, web, IPFS) via HTTP 402 micropayments in USDC/USDm.

README

x402engine-mcp

MCP server for x402 Engine — giving AI agents access to 38 pay-per-call APIs via HTTP 402 micropayments.

Payments are made with USDC on Base, USDC on Solana, or USDm on MegaETH. Prices range from $0.001 to $0.12 per call.

Quick Start

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "x402engine": {
      "command": "npx",
      "args": ["-y", "x402engine-mcp"],
      "env": {
        "X402_DEV_BYPASS": "your-dev-bypass-secret"
      }
    }
  }
}

Claude Code

claude mcp add x402engine -- npx -y x402engine-mcp

Available Tools

LLM Inference

Tool	Price	Description
`llm_chat`	$0.002-$0.09	Chat completion with any supported model

Supported models: GPT-4o ($0.04), GPT-4o Mini ($0.003), OpenAI o1 ($0.03), Claude Opus 4.6 ($0.09), Claude Sonnet 4.5 ($0.06), Claude Haiku 4.5 ($0.02), Gemini 2.5 Pro ($0.035), Gemini 2.5 Flash ($0.009), Grok 4 ($0.06), DeepSeek V3 ($0.005), DeepSeek R1 ($0.01), Llama 3.3 70B ($0.002), Mistral Large 3 ($0.006), Qwen3 235B ($0.004), Perplexity Sonar Pro ($0.06).

Image Generation

Tool	Price	Description
`generate_image`	$0.015-$0.12	AI image generation (fast/quality/text tiers)

Code Execution

Tool	Price	Description
`execute_code`	$0.005	Sandboxed code execution (Python, JS, Bash, R)

Audio

Tool	Price	Description
`transcribe_audio`	$0.10	Audio-to-text transcription (Deepgram Nova-3)
`tts_openai`	$0.01	Text-to-speech (OpenAI)
`tts_elevenlabs`	$0.02	Text-to-speech (ElevenLabs)

Text Embeddings

Tool	Price	Description
`create_embeddings`	$0.001	Text embeddings (OpenAI text-embedding-3-small)

Crypto & Market Data

Tool	Price	Description
`get_crypto_price`	$0.001	Current crypto prices
`get_crypto_markets`	$0.002	Top coins by market cap
`get_crypto_history`	$0.003	Historical price charts
`get_trending_crypto`	$0.001	Trending coins
`search_crypto`	$0.001	Search for coins

Blockchain & Wallet

Tool	Price	Description
`get_wallet_balances`	$0.005	Token balances for any wallet
`get_wallet_transactions`	$0.005	Transaction history
`get_wallet_pnl`	$0.01	Profit & loss analysis
`get_token_prices`	$0.005	DEX-derived token prices
`get_token_metadata`	$0.002	Token metadata
`simulate_transaction`	$0.01	Transaction simulation (Tenderly)

Web

Tool	Price	Description
`web_scrape`	$0.005	Scrape and extract web page content
`web_screenshot`	$0.01	Capture web page screenshot

IPFS Storage

Tool	Price	Description
`pin_to_ipfs`	$0.01	Pin JSON to IPFS
`get_from_ipfs`	$0.001	Retrieve content from IPFS

Discovery

Tool	Price	Description
`discover_services`	Free	List all services and pricing

Environment Variables

Variable	Required	Description
`X402_BASE_URL`	No	Gateway URL (default: `https://x402-gateway-production.up.railway.app`)
`X402_DEV_BYPASS`	No	Dev bypass secret to skip payments
`X402_PAYMENT_HEADER`	No	Pre-signed payment header