Agent observatory
StillOpen checks every A2A agent it knows of once a day: does its Agent Card answer, does its endpoint report an unknown task correctly, is the card signed. Everything below is observed by StillOpen; nothing is reported by the agents' operators.
893 agents watched · 820 answered at the last check · 91 passed the endpoint probe · 61 sign their card. All three counts are out of every agent watched: an agent that did not answer cannot pass the probe and is counted as not passing it. Day counts cover the last 30 days, or since we started watching an agent if that is shorter.
| Agent | Last check | Answered | Probe passed | Signed |
|---|---|---|---|---|
| pawr.link pawr.link |
fail | 16 of 16 days | 0 of 16 days | no |
| pay.hilt.so pay.hilt.so |
fail | 16 of 16 days | 0 of 16 days | no |
| payai.agentstools.dev payai.agentstools.dev |
fail | 16 of 16 days | 0 of 16 days | no |
| payanagent.com payanagent.com |
fail | 16 of 16 days | 0 of 16 days | no |
| perception.to perception.to |
fail | 16 of 16 days | 0 of 16 days | no |
| persidian.com persidian.com |
fail | 16 of 16 days | 0 of 16 days | no |
| pricklypear.rocks pricklypear.rocks |
fail | 16 of 16 days | 0 of 16 days | no |
| prismarket.io prismarket.io |
fail | 16 of 16 days | 0 of 16 days | no |
| pulsefeed.dev pulsefeed.dev |
warn | 16 of 16 days | 0 of 16 days | no |
| P0 Agent Economy Index x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev |
fail | 18 of 18 days | 0 of 18 days | no |
| Packrift A2A Packaging Procurement Router packrift-agent-discovery-hub.vercel.app |
fail | 18 of 18 days | 0 of 18 days | no |
| PaidHandshake Exchange paidhandshake.com |
warn | 18 of 18 days | 18 of 18 days | no |
| PaKi Curator paki-api.elfresonero.workers.dev |
warn | 18 of 18 days | 18 of 18 days | valid over the card as served, not the spec's form |
| Password Hashing and JWT Service bcrypt-python-jose-1b8dd0.getvda.ai |
fail | 18 of 18 days | 0 of 18 days | no |
| pathtoAGI — the Observatory pathtoagi-observatory.netlify.app |
fail | 18 of 18 days | 0 of 18 days | no |
| Peerlace peerlace.com |
warn | 16 of 16 days | 16 of 16 days | no |
| PeptideClinic peptideclinic.fyi |
fail | 10 of 10 days | 0 of 10 days | no |
| Perkoon — Agent Data Layer perkoon.com |
fail | 18 of 18 days | 0 of 18 days | no |
| PetCremation petcremation.fyi |
fail | 10 of 10 days | 0 of 10 days | no |
| Phi Longevity PRISM philongevity.com |
warn | 18 of 18 days | 18 of 18 days | invalid |
| PHION Agent Trust Infrastructure phion.systems |
warn | 18 of 18 days | 0 of 18 days | no |
| Picked by Agents Research Network pickedbyagents.com |
fail | 18 of 18 days | 0 of 18 days | no |
| Pictomancer.ai api.pictomancer.ai |
fail | 18 of 18 days | 0 of 18 days | no |
| Piknik.Spot piknik.spot |
fail | 18 of 18 days | 0 of 18 days | no |
| Pinloft by CyberMax pinloft.cybermax-tools.workers.dev |
fail | 18 of 18 days | 0 of 18 days | no |
| PolicyCheck policycheck.tools |
fail | 18 of 18 days | 0 of 18 days | no |
| PolicyCheck legaleasy.tools |
fail | 0 of 18 days | 0 of 18 days | no |
| PoolParty Agent Concierge www.poolparty.io |
fail | 18 of 18 days | 0 of 18 days | no |
| PostalForm postalform.com |
warn | 18 of 18 days | 0 of 18 days | no |
| Postgres + Grafana Stack Generator postgres-grafana-stack-generator.getvda.ai |
fail | 18 of 18 days | 0 of 18 days | no |
| Postgres + Prometheus Stack Generator postgres-prometheus-stack-generator.getvda.ai |
fail | 18 of 18 days | 0 of 18 days | no |
| Postgres + Redis Compose Generator postgres-redis-compose-generator.getvda.ai |
fail | 18 of 18 days | 0 of 18 days | no |
| Practice Negotiation Partner 18.222.26.118:8082 |
fail | 0 of 18 days | 0 of 18 days | no |
| PREA prea-backend-f064af73127b.herokuapp.com |
fail | 18 of 18 days | 0 of 18 days | no |
| Prestige Hardscape & Construction - Estimate Requests prestige-diaz-operations.tail4ed916.ts.net:10000 |
fail | 0 of 18 days | 0 of 18 days | no |
| Pricewick by CyberMax pricewick.cybermax-tools.workers.dev |
fail | 18 of 18 days | 0 of 18 days | no |
| Printwren by CyberMax printwren.cybermax-tools.workers.dev |
fail | 18 of 18 days | 0 of 18 days | no |
| Priorflow Intelligent Agent/Service Selector agentopt.app |
fail | 18 of 18 days | 0 of 18 days | no |
| PrivateDAO Agent Exchange agents.privatedao.org |
fail | 18 of 18 days | 0 of 18 days | no |
| PrivateDock privatedock.fyi |
fail | 3 of 3 days | 0 of 3 days | no |
| PrivateElevators privateelevators.fyi |
fail | 3 of 3 days | 0 of 3 days | no |
| PrivateWellnessRooms privatewellnessrooms.fyi |
fail | 3 of 3 days | 0 of 3 days | no |
| Proofline Evidence Router proofline-audit.chrismellado.chatgpt.site |
warn | 18 of 18 days | 0 of 18 days | no |
| ProofRail Access Agent kaattaallaa-sketch.github.io |
warn | 18 of 18 days | 0 of 18 days | no |
| Psilocybin Centers psilocybincenters.fyi |
fail | 10 of 10 days | 0 of 10 days | no |
| Public Adjusters Directory publicadjusters.fyi |
fail | 3 of 3 days | 0 of 3 days | no |
Check any agent yourself with the A2A Card check; a card found there joins this list from the next daily run.