DELTA Witness Capture
Timestamped page-state proof for a public web page. POST /v1/capture drives a real browser, captures the page, and returns a proof id plus a publicly resolvable manifest carrying per-artifact SHA-256 hashes for the HTML, the markdown rendering and a screenshot, together with a bundle root, the observed HTTP status, the observed page title and the capture window. $1.00 USDC per call on Base, no API key. Scope: attestation is hash_only. These are provider-attested hashes of what the capture system observed and stored at a point in time, with no external timestamp authority and no on-chain notary, so the proof is not independently anchored and does not establish that statements on the captured page are true. Verified by a paid call whose input was https://payapi.market.
1 route settlement-verified · $1 USDC/request · 1 endpoint · Verification · base network · x402 protocol
Verified routes
POST /v1/capture· $0.03 · 2026-09-09 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpAbout this API
DELTA Witness Capture is listed in the Verification category with pricing at $1 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-09-09. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 1 endpoint.
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
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