{
  "markdown": "# Unit Converter API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://unit-converter.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nConvert between units -- length, weight, temperature, volume, speed, data storage. Formula included. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"unit-converter\": {\n      \"url\": \"https://unit-converter.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl -X POST \"https://unit-converter.api.klymax402.com/api/convert\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"value\":\"1\",\"from\":\"...\",\"to\":\"...\"}'\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `utility_convert_units` | POST | `/api/convert` | $0.003 | Convert a value between measurement units |\n\n### `utility_convert_units`\n\nUse this when you need to convert between measurement units. Returns the conversion result with formula in JSON.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `value` | number | yes | The numeric value to convert |\n| `from` | string | yes | Source unit (e.g. km, lb, celsius, l, mph, MB) |\n| `to` | string | yes | Target unit (e.g. mi, kg, fahrenheit, gal, km/h, GB) |\n| `category` | string | no | Optional category hint: length, weight, temperature, volume, speed, data |\n\nExample response:\n\n```json\n{\"inputValue\":100,\"from\":\"km\",\"to\":\"mi\",\"result\":62.1371,\"formula\":\"100 km * 0.621371 = 62.1371 mi\",\"category\":\"length\"}\n```\n\n**When to use**: unit conversions in calculations, data analysis, scientific computing, recipe scaling, and engineering applications.\n\n**Not for**: currency conversion (use `finance_convert_currency`), timezone conversion (use `utility_convert_timezone`), stock prices (use `finance_get_stock_price`).\n\n## Example agent prompts\n\n- \"Convert between measurement units\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "sha": "cc1625bab93f41ff7a70ab31c8dff37539b06c082fe93e369e0e0fe450202d75",
  "repo_slug": "br0ski777/unit-converter-x402",
  "fonte": "repo",
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  "api": "https://agentalog.com/api/listings/mcp_io_github_br0ski777_unit_converter_61ce22c0/readme"
}