From chaos,
a summary.

Pay-per-call document summarization for AI agents. 5 cents in USDC, on demand. No accounts. No keys. No subscriptions.

混沌

One request.
One nickel.

Send raw text or a PDF URL. Get a structured summary back in the input language. Your AI agent pays $0.05 in USDC, settled on-chain — automatically, via the x402 protocol. 

# try it from the terminal — first call returns 402 Payment Required
curl -X POST https://api.hundun.app/api/summarize \
  -H "Content-Type: application/json" \
  -d '{"pdfUrl": "https://arxiv.org/pdf/2304.05128"}'

# from an x402-aware client (paid automatically)
import { wrapFetchWithPayment } from 'x402-fetch'
const pay = wrapFetchWithPayment(globalThis.fetch, account)
const r = await pay('https://api.hundun.app/api/summarize', ...)

Built for throughput.

Context
200K chars
Languages
auto · zh · en
Auth
wallet only
Setup
zero

Honest pricing.

No tiers. No commit. No card. The first call costs the same as the millionth. Pay only what you use, settled on-chain in seconds.

$0.05 /call

USDC · Base · settled in seconds

→ Read the docs