x402 · USDC · Base / Solana · No signup

Agent-ready APIs

Try every product free through a fixed hourly-cached sample, then pay only for fresh custom calls.

Crypto Radar

Live X + web intelligence, CoinGecko context, structured signals and source-verified citations.

$0.03 / call

Free sample

Multi-model Chat

Grok 4.5 High, DeepSeek V4 Pro/Flash, GLM 5.2, Qwen 3.8 Max, Claude Sonnet 4.6. OpenAI-compatible + streaming.

from $0.01 / call

Free sampleModel list

Crypto Brief

Structured bias, thesis, risks and actions from supplied context.

$0.01 / call

Free sample

Summarize

URL or text to concise summary, key points and actions.

$0.01 / call

Free sample

All samples (JSON)OpenAPIAgent integration

Try it in 10 seconds

curl -s https://x402donghang.duckdns.org/x402/v1/crypto-radar/sample

Agent integration

POST https://x402donghang.duckdns.org/x402/v1/crypto-radar
Content-Type: application/json

{"symbol":"BTC","window":"6h","locale":"en","focus":"ETF flows, regulation, security"}
No signup or API key. Unpaid calls return HTTP 402 with machine-readable payment requirements.