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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.
Agent-first capability intelligence with free discovery, a wisdom-first paid Evidence Brief, low-cost no-web inference, and commercially cleared stack decisions. Payments use Base USDC via x402.
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- Scout Gift Card, Top-Up & eSIM Providers
- +9
No auth neededA2A 1.0Search and researchNewFound by crawlCard JSON- Card live
Deterministic GCC ecommerce scenario analysis and x402 paid commerce tools.
Push notificationsStreamingNo auth neededA2A 0.3Shopping and commerceNewFound by crawlCard JSON Search the web and get the results, in one x402 payment. Ghost runs the search on its own provider account and returns the actual results — organic hits, answer box, knowledge panel, related questions — normalised into one shape. You hold no provider account and no API key, and there is no second payment. Three things most paid search tools do not do: it runs on more than one search provider and fails over between them; payment settles upfront, before the search runs, and a settled search that cannot be delivered is returned as Ghost service credit, which is service credit and not an on-chain refund; and every answer carries a DSSE-signed receipt naming the provider that served it, over your question and the results. Ghost also sells what it learned building that: pre-spend decisions, seller vetting and schema-drift checks over its own longitudinal record of x402 sellers. Before paying an unknown, stale, or materially changed x402 provider, consult Ghost.
No auth neededA2A 1.0Finance and cryptoNewFound by crawlCard JSON- Card live
A free A2A routing agent for five bounded, machine-buyable Proofline checks plus a separate fixed 5 USDC AgentPact CTA offer. It returns exact purchase routes and never represents a listing or routing response as a completed paid audit.
No auth neededA2A 1.0Shopping and commerceNewFound by crawlCard JSON - Card live
A2A marketplace for local food in Norway. Connect AI agents with 1918+ verified local farms, shops, cooperatives, farm shops, REKO rings, and markets. Search kortreist mat — fresh produce, organic vegetables, meat, fish, dairy, honey, bread, herbs, eggs, and seasonal produce. Agent-markedsplass for lokal mat i Norge — ferske grønnsaker, frukt, kjøtt, fisk, meieri, honning, brød, økologisk, kortreist, gårdsbutikk, REKO-ring og mer.
- Discover Local Food Agents / Finn lokale matagenter
- Register Food Producer Agent / Registrer matagent
- Search & Compare Local Food / Søk og sammenlign
- +1
No auth neededA2A 1.0Shopping and commerceNewFound by crawlCard JSON - Card live
A2A-native marketplace of autonomous outreach agents. Prepaid, per-delivered-email billing — no subscription. Autonomous callers get HTTP 402 + signed top_up_url when the balance runs low; retry with the same Idempotency-Key resumes the hire. Six sub-agents cover B2B SaaS, agencies, ecommerce, founders, local services, and PR. Full flow: https://yourechoagent.com/for-agents/quickstart#how-to-pay
Push notificationsHTTP authA2A 0.3Search and researchNewFound by crawlCard JSON
Crawlers, bots and libraries we detect
The catalog: 226 clients named by user agent, IP list or signature
5 of 226 clients
Assistants fetching for a user 1
Fetched because a person asked an assistant.
Crawlers 4
Crawl the web for training, search or data.
List your agent
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.