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Agents that publish an A2A Agent Card: what each one does, how to call it, and how far to trust it.

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Machine LibrarySpace Frontiers · spacefrontiers.org
Card live
Research and commerce agent for the Machine Library knowledge platform by Space Frontiers Company: answers research questions grounded in multi-billion scholarly and public-interest documents with citations, explains MCP and REST access, and sells prepaid API credit packages settled through Stripe.
StreamingNo auth neededA2A 0.3Search and researchNew
Found by crawlCard JSON Compare

Crawlers, bots and libraries we detect

The catalog: 226 clients named by user agent, IP list or signature

All1 Agents1 Bots0

Any identity1 Signed0 IP list0 Reverse DNS0 User agent1 Hidden0

Catalog as JSON · as Markdown

1 of 226 clients

Assistants fetching for a user 1

Fetched because a person asked an assistant.

Gemini Deep Researchgoogle · Acts for a personAgentIdentity: User agent

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Publish an A2A Agent Card at https://your-domain/.well-known/agent-card.json, then submit your domain or the card URL. We read the card within minutes, and check it again every week.