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MCP server · Blockchain

io.github.agentc22/x402engine-mcp

by · github.com/agentc22/x402engine-mcp

Pay-per-call AI APIs for agents via HTTP 402 crypto micropayments (USDC/USDm)

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About io.github.agentc22/x402engine-mcp

io.github.agentc22/x402engine-mcp is an MCP server published by agentc22 in the Blockchain category: pay-per-call AI APIs for agents via HTTP 402 crypto micropayments (USDC/USDm).

The repository has 1 stars and 0 forks, with the last commit 11 days ago. Recent commit activity is the strongest signal that reported issues will get attention.

Install

Claude Code
claude mcp add io-github-agentc22-x402engine-mcp -- npx -y x402engine-mcp
npx
npx -y x402engine-mcp

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

Tools (22)

discover_servicesList all available x402 Engine APIs with pricing, endpoints, and payment networks. Call this first to understand what

Parameters not published.

execute_codeExecute code in a secure sandboxed environment (E2B). Supports Python, JavaScript, Bash, and R. $0.005 per execution.

Parameters not published.

generate_imageGenerate an image from a text prompt. Three quality tiers:

Parameters not published.

get_crypto_categoriesList CoinGecko category IDs for sector discovery and downstream market filters. $0.001 per request.

Parameters not published.

get_crypto_historyGet historical price data for a cryptocurrency. $0.003 per request.

Parameters not published.

get_crypto_marketsGet top cryptocurrencies by market cap with detailed market data. $0.002 per request.

Parameters not published.

get_crypto_priceGet current prices for cryptocurrencies. $0.001 per request.

Parameters not published.

get_from_ipfsRetrieve content from IPFS by CID. $0.001 per request.

Parameters not published.

get_token_metadataGet metadata for a token (name, symbol, decimals, etc.). $0.002 per request.

Parameters not published.

get_token_pricesGet DEX-derived prices for tokens by contract address. $0.005 per request.

Parameters not published.

Show all 22 tools
get_trending_cryptoGet trending cryptocurrencies. $0.001 per request.

Parameters not published.

get_wallet_balancesGet token balances for a wallet address on any supported chain. $0.005 per request.

Parameters not published.

get_wallet_pnlGet profit and loss analysis for a wallet

Parameters not published.

get_wallet_transactionsGet transaction history for a wallet address. $0.005 per request.

Parameters not published.

pin_to_ipfsPin JSON data to IPFS via Pinata. Returns the IPFS CID. $0.01 per pin.

Parameters not published.

search_cheapest_datesFind the cheapest travel dates for a route. Returns date/price pairs sorted by price. $0.01 per request.

Parameters not published.

search_cryptoSearch for a cryptocurrency by name or symbol. $0.001 per request.

Parameters not published.

search_flightsSearch flight offers by route, dates, and passengers. Returns pricing, itineraries, and airlines. $0.01 per request.

Parameters not published.

search_hotelsSearch hotel offers by city and dates. Returns room details, pricing, and availability. $0.01 per request.

Parameters not published.

search_locationsSearch for airports and cities by keyword. Returns IATA codes, names, and coordinates. $0.005 per request.

Parameters not published.

service_healthGet live health metrics for all x402engine services — latency (p50/p95/p99), error rates, request volume, and status. Free, no payment required. Call this before choosing which service to use.

Parameters not published.

transcribe_audioTranscribe audio to text using Deepgram Nova-3. Accepts a public URL to an audio file. $0.10 per transcription.

Parameters not published.

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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

Payment Networks

  • Base (EVM) — USDC, 6 decimals, ~2s confirmation
  • Solana — USDC, 6 decimals, ~400ms confirmation
  • MegaETH (EVM) — USDm, 18 decimals, ~10ms confirmation

How It Works

  1. Agent calls an MCP tool (e.g., llm_chat)
  2. MCP server makes HTTP request to x402engine.app
  3. Gateway returns 402 Payment Required with pricing
  4. Agent pays with crypto via the x402 protocol
  5. Gateway verifies payment on-chain and returns data

For automatic payment handling, use @x402/fetch in your agent code.

Links

README copy captured when this server was indexed; it may lag the repository. The original is authoritative.

Questions

About io.github.agentc22/x402engine-mcp

How do I install io.github.agentc22/x402engine-mcp?

Run claude mcp add io-github-agentc22-x402engine-mcp -- npx -y x402engine-mcp, then add the server to your MCP client's configuration.

Is io.github.agentc22/x402engine-mcp safe to use with an AI agent?

Its trust score is 37 out of 100 (low). It passes 1 of the 1 static security checks run so far. It has no ConduID identity yet, so agent calls to it are not receipted.

Is io.github.agentc22/x402engine-mcp still maintained?

Yes — the last commit was 11 days ago. The repository has 1 stars and 0 forks.