Agent APIs

x402 / USDC / eip155:8453

Response

No request

{}

Read pageGET /api/resolve

Markdown, headings, links and source timestamp. Up to 1 URL.

$0.002per request

Compare changesGET /api/diff

Added and removed lines against the shared URL baseline. Up to 1 URL.

$0.004per request

Extract pricingGET /api/pricing-snapshot

Price mentions and commercial terms from public HTML. Up to 5 URLs.

$0.02per request

Watch pagesGET /api/page-watch-30d

Daily comparisons with a private baseline and poll token. Up to 5 URLs.

$0.50per 30 days

Agent client

curl --fail --output agent-client.mjs https://fetchdelta.com/agent-client.mjs
node agent-client.mjs inspect resolve https://example.com
node agent-client.mjs pay page-watch-30d https://example.com --receipt watch.json
node agent-client.mjs poll watch.json

Node.js 22+. Paid calls require a locally configured, authorized wallet and the dependencies listed in the agent skill. Watch receipts contain private access tokens. Polling is unpaid; watches expire after 30 days without automatic renewal.

API limits

Public HTTP(S) sources only. No JavaScript rendering, logins or bot-protection bypass. Pricing output contains text mentions, not verified offers. One-off diffs share a URL baseline; prepaid watches use private baselines. Daily checks are not real-time alerts.

Agent APIs

Request

Response