hash.compute

# 1. Probe the endpoint with no auth — receive 402 with PaymentRequirements
curl -sS -X POST 'https://2s.io/api/hash/compute' \
  -H 'Content-Type: application/json' \
  -d '{"input":"example","algorithms":["md5"],"algorithm":"md5","inputEncoding":"utf8","outputEncoding":"hex"}'

# 2. Sign the EIP-3009 transferWithAuthorization for the advertised price +
#    payTo from the 402 envelope, then retry with PAYMENT-SIGNATURE:
curl -sS -X POST 'https://2s.io/api/hash/compute' \
  -H 'Content-Type: application/json' \
  -H 'PAYMENT-SIGNATURE: <base64-json-payload>' \
  -d '{"input":"example","algorithms":["md5"],"algorithm":"md5","inputEncoding":"utf8","outputEncoding":"hex"}'

# Or just use the canonical runner — it handles the whole loop:
#   EVM_PRIVATE_KEY=0x... node --env-file=.env.local \
#     --experimental-strip-types scripts/x402-pay.ts \
#     'https://2s.io/api/hash/compute'

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.hash.compute({
  "input": "example",
  "algorithms": [
    "md5"
  ],
  "algorithm": "md5",
  "inputEncoding": "utf8",
  "outputEncoding": "hex"
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.hash.compute(input="example", algorithms=["md5"], algorithm="md5", inputEncoding="utf8", outputEncoding="hex")

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
//    EVM_PRIVATE_KEY funds x402 payments per call.

// claude_desktop_config.json
{
  "mcpServers": {
    "2sio": {
      "command": "npx",
      "args": ["-y", "@2sio/mcp"],
      "env": { "EVM_PRIVATE_KEY": "0x..." }
    }
  }
}

// 2. Once the server is running, agents call this tool via standard MCP:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "hash.compute",
    "arguments": {
      "input": "example",
      "algorithms": [
        "md5"
      ],
      "algorithm": "md5",
      "inputEncoding": "utf8",
      "outputEncoding": "hex"
    }
  }
}