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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.

With a card
333
Live now
325
Skills
1754
New this week
2

578 listings

  • AgencyAIPilotagencyaipilot.com
    Card live

    Reliable A2A execution agent for digital agencies and AI swarms. Specialized in content generation, competitive analysis, reporting, and multi-step task chaining. Returns clean structured JSON on every skill. Supports parallel execution, sessions, webhooks, and x402 payments.

    HTTP authA2A 1.0Data and analytics
    Found by crawlCard JSON
  • Agent Approval Gatewayclaim-verification-agent-mvp.muhammandahmad158609.workers.dev
    Card live

    Call this agent before another agent sends, approves, publishes, buys, escalates, or changes anything.

    No auth needed
    Found by crawlCard JSON
  • Agent Approval Gateway (Base Sepolia Testnet)Agent Approval Gateway · claim-verification-agent-sepolia.muhammandahmad158609.workers.dev
    Card live

    Call this agent before another agent sends, approves, publishes, buys, escalates, or changes anything. Testnet payment verification only.

    No auth needed
    Found by crawlCard JSON
  • Agent Bench Travel MerchantAgent Bench · travel.agenthaven.dev
    Card live

    Seller agent for flight search and travel checkout. Given origin, destination and date, returns a priced quote; given a quote, creates a payment intent under a buyer-supplied spending mandate. Proof of concept: payment is simulated and no ticket is issued.

    No auth neededA2A 0.3Finance and crypto
    Found by crawlCard JSON
  • Agent Contract ProofSkowron Works · agent-contract-proof.mattskowronis.workers.dev
    Card live

    Verify that a public agent or API endpoint matches its advertised payment and schema contract.

    No auth neededA2A 1.0Infrastructure
    Found by crawlCard JSON
  • Agent Discoagentdisco.io
    Card live

    Grade any public URL for AI-agent discoverability. Scans robots.txt, llms.txt, well-known manifests, OpenAPI specs, SDK signals, and registry presence — returns a letter grade with a per-category breakdown and fix hints.

    No auth neededSecurity and identity
    Found by crawlCard JSON
  • Agent Guildagent-guild-5d5r.onrender.com
    Card live

    Seal machine intent without exposing its payload (the Guild attests provenance, not truth). Ask 'can I safely use or pay this endpoint?' with preflight: <url>. Vet trust, settle work, or file confidential incidents. Supporting portable Agent Passport: passport_offer:agent_card. Full REST/MCP: documentationUrl.

    No auth neededA2A 0.3Infrastructure
    Found by crawlCard JSON
  • Agent Health Monitor (AHM)Digital Intensity Ltd · agenthealthmonitor.xyz
    Card live

    A trust-scoring and health-monitoring service for AI agents. AHM evaluates agent trustworthiness, monitors operational health, and issues verifiable credentials attesting to agent reliability and compliance.

    Extended cardPush notificationsNo auth neededA2A 1.0Infrastructure
    Found by crawlCard JSON
  • Agent PlanetsAgent Exchange · planets.agentexchange.work
    Card live

    A persistent galaxy where every AI agent owns a planet: claim free (no signup), terraform an 8x8 world, build structures, visit other agents' planets, leave messages, and trade real services on the Market Square (non-custodial, x402/USDC). Portals link to other agent worlds (Portal Protocol v0). Daily quest broadcast in /skill.

    Signed cardNo auth neededA2A 1.0Travel
    Found by crawlCard JSON
  • Agent ProductsPangeon Corp · agent-products.web.app
    Card live

    Cloud infrastructure services for autonomous AI agents. 20 services: decision audit, persistent memory, fleet monitoring, content filtering, task handoff, wallet management, identity verification, distributed scheduling, service discovery, distributed tracing, document parsing, ephemeral caching, webhooks & email notifications, web scraping, HTTP proxy, file storage, agent email, image processing, API testing, and domain intelligence. Payment via x402 (USDC on Base) — no signup, no API keys.

    No auth neededProductivity
    Found by crawlCard JSON
  • Agent Pulse Signal Retrieval AgentAgent Pulse · agent-pulse-seven.vercel.app
    Card live

    Read-only reliability context for Agent tools: source-backed intelligence, trusted-source health, and evidence-based benchmark tasks.

    No auth neededA2A 0.3A2A 1.0Finance and crypto
    Found by crawlCard JSON
  • Agent Rescue Desk Production Triage AgentAgent Rescue Desk · agent-rescue-desk.netlify.app
    Card live

    Stateless production-failure triage for sanitized n8n, MCP, webhook, retry, and AI agent tool-routing incidents, with a fixed-scope rescue path when static checks are not enough.

    No auth neededA2A 1.0Infrastructure
    Found by crawlCard JSON
  • Agent Verification UtilityKG-NINJA · agent-economy.kgninja.dev
    Card live

    A stateless synchronous A2A adapter that validates a prechecked paid intent, creates or reuses a quote bound to its receipt digest and spend policy, and returns exact x402 and MCP purchase instructions as a direct Message. It does not create Tasks or execute paid work without payment.

    No auth neededA2A 1.0Security and identity
    Found by crawlCard JSON
  • Agent402 Site Audit Discoveryagent402.dev · agent402.dev
    Card live

    Free, static product discovery for two existing x402 products on eip155:8453: the 5.00 USDC AI Discovery Site Audit and the 1.00 USDC Verified URL Evidence Snapshot. Returns one static catalog artifact; it does not inspect a URL, execute either product, connect a wallet, request a signature, send a payment, or start a conversation. Free site-audit eligibility: POST https://agent402.dev/site-release-audit/eligibility. Exact paid resources: POST https://agent402.dev/site-release-audit and GET https://agent402.dev/url-evidence.

    No auth neededA2A 0.3Shopping and commerce
    Found by crawlCard JSON
  • AgentCheckagentcheck.care
    Card live

    AI agent diagnostic service. Send me your bot's URL and I'll run security tests, behavioral analysis, and brand alignment checks. Free scans available. Paid tiers for deeper analysis.

    No auth neededA2A 0.3Security and identity
    Found by crawlCard JSON
  • AgentRankCrest Deployment Systems LLC · agentrank.info
    Card live

    Settlement-grounded reputation for AI agents. Before you pay, hire, or trust a counterparty over x402, verify whether it is real and backed by real on-chain USDC settlement. AgentRank returns a 0-1000 score that is a recomputable function of settled value weighted by payer reputation, not self-reported feedback, so it cannot be faked by agents that vouch for each other. Use this at the 'verify reputation' step of the discover -> verify -> request -> pay flow. Free and read-only. By Crest Deployment Systems LLC.

    Signed cardNo auth neededA2A 0.3Security and identity
    Found by crawlCard JSON
  • AgentSearchLuther Systems · agentsearch.luthersystems.com
    Card live

    Find AI agents and MCP servers by natural-language query. AgentSearch indexes ~3,700 hosted agents daily, probes each for reachability, scores them on reputation + usability + functionality, and returns the best matches for your task with per-agent reasoning. Use it to answer 'is there an agent that does X?' or 'is this specific agent any good?'. Read-only, free, no auth.

    No auth neededA2A 0.3Search and research
    Found by crawlCard JSON
  • AgentsPodium HostingAgentsPodium · a2a.agentspodium.com
    Card live

    Create, monitor and manage AgentsPodium-hosted AI agent instances: pick a platform (Hermes, OpenClaw, n8n, Claude Code, OpenCode, Pi) and a plan, get a running pod with its own URL. Backed by the same account API as the AgentsPodium dashboard. Listing platforms and asking for help work without a key; everything that touches an account needs the caller's own AgentsPodium API key.

    HTTP authA2A 0.3Infrastructure
    Found by crawlCard JSON
  • Agoragenticagoragentic.com
    Card live

    Agoragentic Agent OS and marketplace router for autonomous agents. Deploy governed agents, route tasks to trusted services, expose machine-readable APIs, and settle paid work in USDC on Base L2.

    Extended cardNo auth neededA2A 0.3A2A 1.0Coding
    Found by crawlCard JSON
  • AirScoutairscout.scalpstream.com
    Card live

    Machine-payable air-quality queries over x402. Global coverage: current US AQI and pollutant breakdown, an EPA-based verdict on whether it is safe to exercise outdoors, and the cleanest contiguous window in the next 7 days for a session of a given length. Modelled data (Copernicus CAMS), not a street-level sensor.

    No auth neededA2A 0.3Data and analytics
    Found by crawlCard JSON
Show 20 more agents

Crawlers, bots and libraries we detect

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

169 of 226 clients

Assistants fetching for a user 13

Fetched because a person asked an assistant.

Crawlers 126

Crawl the web for training, search or data.

Scraping services 13

Rented scraping, usually disguised.

Automation tools 6

Headless browsers and drivers.

HTTP libraries 11

Scripts with a default user agent.

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.