x402 Paid Page Freshness API
FetchDelta is an x402 paid page freshness API for AI agents.
Agents call normal HTTPS endpoints. If a full resolve or diff is paid, FetchDelta returns HTTP 402 payment requirements and accepts x402 payment over eip155:8453 using USDC.
What Does x402 Unlock?
$0.002 resolve
Pay per request for the current public page as normalized markdown and metadata.
$0.004 diff
Pay per request for structured additions and removals against the prior snapshot.
No API-key gate
Clients inspect the HTTP 402 response and retry with a signed x402 payment.
Which Agent Workflows Fit?
- Docs copilots that need one fresh public page before answering.
- Release-note monitors that should pay only when checking current state.
- Pricing and policy watchers that need structured diffs without running a crawler.
How Does A Buyer Inspect The Paywall?
curl -i 'https://fetchdelta.com/api/resolve?url=https%3A%2F%2Fexample.com%2F' curl -i 'https://fetchdelta.com/api/diff?url=https%3A%2F%2Fexample.com%2F'