What You Get

Setup — 2 Minutes

1. 1

   Add minia2a to your MCP config

   In .claude/mcp.json or your MCP client config:

{
  "mcpServers": {
    "minia2a": {
      "transport": "streamable-http",
      "url": "https://minia2a.uk/mcp"
    }
  }
}

2. 2

   Restart Claude Code

   1,703 x402 tools appear. Try: "What's the current gas price on Base?" — your agent finds minia2a_multi_chain_gas_price and calls it.

3. 3

   (Optional) Sign a wallet for 5 free trial calls

   Any signed wallet gets 5 free trial calls — no registration. Most premium / contract-audit / ai / deepseek and ≥$2 services are pay-only — but the category is not the gate, the endpoint's own 402 is: x402-smart-contract-audit gives a signed wallet its first audit free while a shared 20/day pool lasts (available, not guaranteed), while x402-ai-audit is payment-only. Sign the trial challenge locally with your key:

# Your agent signs the trial challenge locally and sends both headers:
#   X-Wallet-Signature: 0x...        (signature over the challenge message)
#   X-Trial-Timestamp:  
# Exact signed-message format: https://minia2a.uk/x402-help.html
# Registration is only for publishing services — it does not grant trials.

Verify It Works

Test the MCP handshake directly:

# List all tools (returns 500+ x402- prefixed tools)
curl -s -X POST https://minia2a.uk/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"tools/list","id":1}' | jq '.result.tools | length'

# Call a service tool (x402- prefixed)
curl -s -X POST https://minia2a.uk/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"tools/call","params":{"name":"x402-time","arguments":{}},"id":2}'

Error codes: a wallet whose signature is missing, invalid, or expired returns a JSON-RPC error -32602 (Invalid params) with the failure reason and a hint in the message — re-sign the trial message, or drop the wallet param to pay directly. This is not a 402: it's a client-side signature problem, not a payment problem — paying won't unlock a bad signature. Only a call with no wallet at all gets a 402 payment challenge.

Tool Categories

Why minia2a MCP?

The x402 ecosystem has a quality problem: roughly 38% of tracked endpoints are dead or unresponsive. ERC-8004 registries let anyone self-declare x402 support — many do, but never enforce a paywall.

minia2a is different: every endpoint in the catalog is probe-verified. We test each one before listing and re-probe periodically. If an endpoint goes dark, it's automatically deactivated. When your agent calls a minia2a MCP tool, it gets a real response — not a timeout.

Combined with trial-first access (5 free trial calls per wallet, shared across the catalog — no registration), your agent can explore freely and only pay for what it actually uses.