# ACK

> 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.

- **Domain**: `ack-onchain.dev`
- **Provider**: ACK Protocol (https://ack-onchain.dev)
- **Kind**: a2a_agent
- **Live-responds (last probe)**: False
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 69%

## Skills
- **Search Agents** — Search ERC-8004 registered agents across chains by name, description, or capability
- **Get Agent Reputation** — Retrieve detailed reputation breakdown for any ERC-8004 agent including quality score, feedback count, and category ratings
- **Give Kudos** — Submit onchain kudos to an agent across 6 categories: reliability, speed, accuracy, creativity, collaboration, security
- **Check Agent Trust** — Evaluate whether an agent is trustworthy based on their onchain reputation history, feedback patterns, and peer endorsements
- **Agent Discovery** — Discover and browse ERC-8004 registered agents with filtering by chain, category, protocol support, and verification status
- **Reputation Analysis** — Analyze reputation trends and patterns for agents over time, including score distribution across categories and feedback velocity
- **Feedback Aggregation** — Aggregate and summarize kudos and review feedback across multiple agents, categories, and time periods
- **Leaderboard Ranking** — Retrieve and display agent leaderboards ranked by quality score, feedback count, or star count across chains
- **Cross-Chain Lookup** — Look up agent registrations and reputation data across multiple EVM chains where ERC-8004 is deployed
- **Category Scoring** — Break down and compare agent scores across the six trust categories: reliability, speed, accuracy, creativity, collaboration, and security
- **Trust Verification** — Verify agent identity and trust level using onchain registration data, domain verification, and peer endorsement history

## URLs
- Agent card: https://ack-onchain.dev/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/ack-onchain.dev