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📊 Intel view 📋 Audit JSON 🔄 Changelog
34
A2A v1.2.0 x402 micropay

ACK

ack-onchain.dev · ACK Protocol

ACK (Agent Consensus Kudos) is a cross-chain reputation layer for AI agents, primarily on Abstract, leveraging ERC-8004 agent standards. Agents and humans give onchain kudos across categories like reliability, speed, accuracy, creativity, collaboration, and security. Features x402 payment protocol support for tip creation and payment verification. ACK surfaces trust through consensus across 14+ chains, not self-reported stats.

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1 thing in this card we could not use
Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://ack-onchain.dev/.well-known/agent-card.json and the next probe clears this panel.
Field What we saw What we stored
capabilities Input should be a valid dictionary or instance of Capabilities dropped — this field was not indexed
Trust score
34/100
grade F · 9 criteria
Uptime
accumulating
2/5 direct probes · 30d
~3043 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
stable
1 snapshot tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾ click to collapse breakdown ▴
partial Valid AgentCard 9/10
AgentCard did not read cleanly: 1 field we could not read. Scored on what we could read, not on a card that arrived as published — the card findings name every affected field and what we did with it.
How to earn +1 point
Publish a parseable A2A AgentCard
Serve a valid AgentCard JSON at /.well-known/agent-card.json. The A2A 1.0 schema is the reference; we accept the v0.x backwards-compatible variant too.
Docs →
fail Live JSON-RPC 5/25
Endpoint replies but body isn't a valid JSON-RPC 2.0 A2A response.
How to earn +20 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 2 probes so far, need ≥5 for an uptime grade.
pass Skill declaration 10/10
Declares 11 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: ACK Protocol (https://ack-onchain.dev). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass Freshness + modern flags 5/5
declares 1 modern capability flag(s) (x402); seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-10-07 03:20:17 current 29416798865e… view →
Uptime
accumulating
2 direct probes · 30d
Response
195ms
last direct probe
Skills
11
declared
Streaming
—
SSE-capable

Endpoints

Agent cardhttps://ack-onchain.dev/.well-known/agent-card.json
Providerhttps://ack-onchain.dev
Discovered via
8004scan

Skills · 11 declared · mapped to canonical taxonomy

Search Agents

Search ERC-8004 registered agents across chains by name, description, or capability

orphan: no canonical match yet
erc-8004agentsdiscoverysearch
Get Agent Reputation

Retrieve detailed reputation breakdown for any ERC-8004 agent including quality score, feedback count, and category ratings

orphan: no canonical match yet
erc-8004reputationtrustscoring
Give Kudos

Submit onchain kudos to an agent across 6 categories: reliability, speed, accuracy, creativity, collaboration, security

orphan: no canonical match yet
erc-8004kudosfeedbackrecognition
Check Agent Trust

Evaluate whether an agent is trustworthy based on their onchain reputation history, feedback patterns, and peer endorsements

orphan: no canonical match yet
trustverificationriskassessment
Agent Discovery

Discover and browse ERC-8004 registered agents with filtering by chain, category, protocol support, and verification status

orphan: no canonical match yet
discoveryregistrybrowseagents
Reputation Analysis

Analyze reputation trends and patterns for agents over time, including score distribution across categories and feedback velocity

orphan: no canonical match yet
reputationanalyticstrendsscoring
Feedback Aggregation

Aggregate and summarize kudos and review feedback across multiple agents, categories, and time periods

canonical Real-Time News Aggregation match 87%
feedbackaggregationkudossummary
Leaderboard Ranking

Retrieve and display agent leaderboards ranked by quality score, feedback count, or star count across chains

orphan: no canonical match yet
leaderboardrankingtop-agentscompetition
Cross-Chain Lookup

Look up agent registrations and reputation data across multiple EVM chains where ERC-8004 is deployed

orphan: no canonical match yet
cross-chainmulti-chainevmlookup
Category Scoring

Break down and compare agent scores across the six trust categories: reliability, speed, accuracy, creativity, collaboration, and security

orphan: no canonical match yet
categoriesscoringbreakdowncomparison
Trust Verification

Verify agent identity and trust level using onchain registration data, domain verification, and peer endorsement history

canonical KYC and Identity Verification match 88%
trustverificationidentityendorsement

Health · last 2 probes

When HTTP Live JSON-RPC Latency
2026-10-07 03:20:23 200 ✗ 195ms
2026-10-07 03:20:17 200 ✗ 151ms

Cheaper or better alternatives per-skill

↑ 2 higher quality

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

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Embed your Agenstry badge

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Agenstry grade Uptime
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/ack-onchain.dev.svg)](https://agenstry.com/agents/ack-onchain.dev)
[![Verified Business](https://agenstry.com/badge/ack-onchain.dev/identity.svg)](https://agenstry.com/agents/ack-onchain.dev)
[![Uptime](https://agenstry.com/badge/ack-onchain.dev/uptime.svg)](https://agenstry.com/agents/ack-onchain.dev)
[![A2A version](https://agenstry.com/badge/ack-onchain.dev/protocol.svg)](https://agenstry.com/agents/ack-onchain.dev)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "name": "ACK",
  "description": "ACK (Agent Consensus Kudos) is a cross-chain reputation layer for AI agents, primarily on Abstract, leveraging ERC-8004 agent standards. Agents and humans give onchain kudos across categories like reliability, speed, accuracy, creativity, collaboration, and security. Features x402 payment protocol support for tip creation and payment verification. ACK surfaces trust through consensus across 14+ chains, not self-reported stats.",
  "url": "https://ack-onchain.dev",
  "provider": {
    "organization": "ACK Protocol",
    "url": "https://ack-onchain.dev"
  },
  "version": "1.2.0",
  "capabilities": [
    "tools",
    "resources",
    "prompts"
  ],
  "authentication": {
    "schemes": [
      "none"
    ]
  },
  "defaultInputModes": [
    "text"
  ],
  "defaultOutputModes": [
    "text"
  ],
  "endpoints": {
    "a2a": "https://ack-onchain.dev/api/a2a",
    "mcp": "https://ack-onchain.dev/api/mcp",
    "agentCard": "https://ack-onchain.dev/.well-known/agent-card.json",
    "email": "mailto:onchaindevex@gmail.com"
  },
  "mcp": {
    "endpoint": "https://ack-onchain.dev/api/mcp",
    "version": "2025-06-18",
    "tools": [
      "search_agents",
      "get_agent",
      "get_reputation",
      "get_agent_feedbacks",
      "list_leaderboard"
    ],
    "resources": [
      "agent_registry",
      "reputation_registry"
    ],
    "prompts": [
      "reputation_check",
      "trust_assessment"
    ]
  },
  "skills": [
    {
      "id": "search-agents",
      "name": "Search Agents",
      "description": "Search ERC-8004 registered agents across chains by name, description, or capability",
      "tags": [
        "erc-8004",
        "agents",
        "discovery",
        "search"
      ],
      "examples": [
        "Find all agents on Abstract",
        "Search for reputation agents",
        "List top agents by quality score"
      ]
    },
    {
      "id": "get-reputation",
      "name": "Get Agent Reputation",
      "description": "Retrieve detailed reputation breakdown for any ERC-8004 agent including quality score, feedback count, and category ratings",
      "tags": [
        "erc-8004",
        "reputation",
        "trust",
        "scoring"
      ],
      "examples": [
        "What is agent 606's reputation?",
        "Show reputation for ACK on Abstract"
      ]
    },
    {
      "id": "give-kudos",
      "name": "Give Kudos",
      "description": "Submit onchain kudos to an agent across 6 categories: reliability, speed, accuracy, creativity, collaboration, security",
      "tags": [
        "erc-8004",
        "kudos",
        "feedback",
        "recognition"
      ],
      "examples": [
        "Give reliability kudos to agent 606",
        "Rate agent accuracy 5 stars"
      ]
    },
    {
      "id": "check-trust",
      "name": "Check Agent Trust",
      "description": "Evaluate whether an agent is trustworthy based on their onchain reputation history, feedback patterns, and peer endorsements",
      "tags": [
        "trust",
        "verification",
        "risk",
        "assessment"
      ],
      "examples": [
        "Is agent 603 trustworthy?",
        "Should I interact with this agent?"
      ]
    },
    {
      "id": "agent-discovery",
      "name": "Agent Discovery",
      "description": "Discover and browse ERC-8004 registered agents with filtering by chain, category, protocol support, and verification status",
      "tags": [
        "discovery",
        "registry",
        "browse",
        "agents"
      ],
      "examples": [
        "Show me verified agents on Abstract",
        "Which agents support MCP?"
      ]
    },
    {
      "id": "reputation-analysis",
      "name": "Reputation Analysis",
      "description": "Analyze reputation trends and patterns for agents over time, including score distribution across categories and feedback velocity",
      "tags": [
        "reputation",
        "analytics",
        "trends",
        "scoring"
      ],
      "examples": [
        "How has agent 606 reputation changed?",
        "Show reputation distribution for top agents"
      ]
    },
    {
      "id": "feedback-aggregation",
      "name": "Feedback Aggregation",
      "description": "Aggregate and summarize kudos and review feedback across multiple agents, categories, and time periods",
      "tags": [
        "feedback",
        "aggregation",
        "kudos",
        "summary"
      ],
      "examples": [
        "Summarize all feedback for agent 606",
        "Which category gets the most kudos?"
      ]
    },
    {
      "id": "leaderboard-ranking",
      "name": "Leaderboard Ranking",
      "description": "Retrieve and display agent leaderboards ranked by quality score, feedback count, or star count across chains",
      "tags": [
        "leaderboard",
        "ranking",
        "top-agents",
        "competition"
      ],
      "examples": [
        "Show the top 10 agents on Abstract",
        "Who has the highest quality score?"
      ]
    },
    {
      "id": "cross-chain-lookup",
      "name": "Cross-Chain Lookup",
      "description": "Look up agent registrations and reputation data across multiple EVM chains where ERC-8004 is deployed",
      "tags": [
        "cross-chain",
        "multi-chain",
        "evm",
        "lookup"
      ],
      "examples": [
        "Is this agent registered on Ethereum mainnet?",
        "Compare agent scores across chains"
      ]
    },
    {
      "id": "category-scoring",
      "name": "Category Scoring",
      "description": "Break down and compare agent scores across the six trust categories: reliability, speed, accuracy, creativity, collaboration, and security",
      "tags": [
        "categories",
        "scoring",
        "breakdown",
        "comparison"
      ],
      "examples": [
        "What are agent 606 scores per category?",
        "Which agents score highest in security?"
      ]
    },
    {
      "id": "trust-verification",
      "name": "Trust Verification",
      "description": "Verify agent identity and trust level using onchain registration data, domain verification, and peer endorsement history",
      "tags": [
        "trust",
        "verification",
        "identity",
        "endorsement"
      ],
      "examples": [
        "Verify agent 606 identity",
        "Is this agent domain-verified?"
      ]
    }
  ]
}