Send messy food text the way a person actually types it. Get back clean, sourced calorie JSON — no scraping, no guesswork.
50 free calls/day, no key required · pay-per-call for agents over x402
"2 large eggs", "a cup of cooked rice", "grilled chicken breast" — kcaldata parses the quantity and unit, finds the right whole food over the processed lookalike, and does the math. The hard part isn't the data; it's understanding the request.
Call it as plain REST, connect it as an MCP tool in Claude, ChatGPT, or Gemini, or let an autonomous agent pay per call over x402. One service, every way an agent might reach for it.
Responses carry the matched food, the per-100g value, the exact grams used, and a plain-language basis line. Built on USDA FoodData Central (public domain) — so you can always see, and trust, where a number came from.
No accounts, no invoices, no card forms. An AI agent hits the paid endpoint, the endpoint quotes a price, the agent pays a fraction of a cent in USDC, and the data comes back — all in one HTTP round-trip, no human in the loop.
This is the x402 standard (HTTP 402, revived) — the same rail Coinbase, Cloudflare, Visa, and others are building agent payments on.
Try it from your terminal right now. 50 calls a day, free.
Add kcaldata to Claude (or any MCP client) as a custom connector.
For autonomous agents paying in USDC on Base.
Full schema for codegen, tooling, and agents.
No key, no signup, no card. Call the REST endpoint or connect the MCP tool and start immediately. Enough to build and test a real integration.
$0 · forever
For apps that need more than the free tier. A dedicated key with a raised daily limit, billed monthly in USDC. Email for a key — issued manually while we're small, so you'll talk to a human.
25 USDC / month · kcaldata@protonmail.com
For autonomous agents with a wallet. No account, no subscription — the endpoint quotes a price, your agent pays in USDC over x402, and the data comes back in the same round-trip.
$0.005 / call · USDC on Base