unit_convert $0.001 per call

Converts a numeric value between units within a category (length, mass, volume, temperature, area, speed, data) using a fixed offline conversion table. Pure computation, no network access.

For AI agents: call unit_convert
POST https://toll402.dev/v1/t/unit_convert
{
 "value": 1,
 "category": "length",
 "from": "km",
 "to": "mi"
}
Answers 402 with x402 payment requirements; pay with any x402 client (@x402/fetch, x402 for Python, toll402-client, toll402-mcp) or send a prepaid-credits key as x-toll402-key (https://toll402.dev/credits). Paid per call via x402 (USDC on Base) or with a prepaid-credits key (x-toll402-key, card at /credits); charged only on success. Start at /llms.txt or connect the MCP server: npx -y toll402-mcp · remote https://toll402.dev/mcp.

Input schema

{
 "type": "object",
 "properties": {
  "value": {
   "type": "number"
  },
  "category": {
   "type": "string",
   "enum": [
    "length",
    "mass",
    "volume",
    "temperature",
    "area",
    "speed",
    "data"
   ]
  },
  "from": {
   "type": "string"
  },
  "to": {
   "type": "string"
  }
 },
 "required": [
  "value",
  "category",
  "from",
  "to"
 ],
 "additionalProperties": false
}

MCP

{"mcpServers":{"toll402":{"command":"npx","args":["-y","toll402-mcp"],"env":{"TOLL402_WALLET_KEY":"0x..."}}}}

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