AmanChain MCP Gateway

59 pay-per-call AI services as MCP tools — with automatic x402 payment in USDC on Base.

Crypto prices & audits, whale alerts, market reports, LLM chat, image generation, invoices & receipts, web fetch/search/summarize, geolocation, translation, and more — no API keys, no signups, no subscriptions. Your agent pays per call with USDC (gasless — the facilitator covers gas), every settlement lands on-chain with a receipt.

Works with Claude Code, Claude Desktop, Cursor, and any MCP-compatible client.

Quickstart (60 seconds)

Get a Base wallet with ~$1 of USDC (Coinbase → withdraw USDC → Base network, or bridge.base.org).
Add the server:

Claude Code

Terminal

claude mcp add amanchain -e AMAN_PRIVATE_KEY=0xYOUR_KEY -- npx -y amanchain-mcp

Claude Desktop / Cursor (claude_desktop_config.json / mcp.json)

config.json

{
  "mcpServers": {
    "amanchain": {
      "command": "npx",
      "args": ["-y", "amanchain-mcp"],
      "env": { "AMAN_PRIVATE_KEY": "0xYOUR_KEY" }
    }
  }
}

Ask your agent: "use amanchain to get the current BTC price" — done.

No wallet yet? Run it without AMAN_PRIVATE_KEY — the catalog, prices and service discovery all work; paid calls explain exactly what to set up.

What your agent gets

amanchain_catalog first, then one tool per service. Highlights:

Tool	What it does	Price
`aman_crypto_price`	Live crypto price	~$0.001
`aman_token_audit`	On-chain token audit (backing, flags, holders, depth)	~$0.025
`aman_market_report`	Full market report	~$0.03
`aman_llm_chat`	LLM completion	~$0.008
`aman_image_gen`	Image generation	~$0.013
`aman_web_search` / `aman_web_fetch` / `aman_summarize`	Web pipeline	~$0.003–0.008
`aman_crypto_whale_watch`	Whale transaction watch	~$0.10
`aman_geo_ip`, `aman_weather`, `aman_fx_rates`, `aman_translate` …	utilities	~$0.001–0.005

Prices are set by the network, quoted live in every 402 response, and published in the live catalog. Every payment produces an on-chain receipt — see the public receipts ledger.

Safety

Your key never leaves your machine — it only signs EIP-3009 USDC transfers locally.
AMAN_MAX_USD_PER_CALL (default $0.05) — refuses any pricier quote.
AMAN_MAX_USD_PER_DAY (default $1.00) — rolling daily cap, persisted in ~/.amanchain-mcp-spend.json.
Prices are taken only from the server's signed 402 challenge — never guessed.

All env vars: AMAN_PRIVATE_KEY, AMAN_ORIGIN, AMAN_MAX_USD_PER_CALL, AMAN_MAX_USD_PER_DAY, AMAN_SPEND_LEDGER.

How it works

Code

agent ── tools/call ──▶ amanchain-mcp ──▶ POST /api/x402/<service>
                              ◀────────── 402 + signed price challenge
        local EIP-3009 signature (USDC on Base, gasless)
                              ──▶ retry + PAYMENT-SIGNATURE
                              ◀────────── 200 + result + on-chain receipt

AmanChain is a quantum-resistant proof-of-work chain whose AI marketplace settles agent payments on-chain — service results and receipts are mined into blocks.

Amanchain MCP README

AmanChain MCP Gateway

Quickstart (60 seconds)

What your agent gets

Safety

How it works

Links