The trust and discovery layer for the MCP economy — find agent tools by what they do, and verify the identities and reputation behind every endpoint (MCP, A2A, x402, ERC-8004).
| Title | Updated | Release | Workflow | Coverage | Issues | License |
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| mcp-agent-assessment |  |
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| mcp-agent-validator |  |
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- mcp-agent-validator: Web UI + REST API — discover agent tools by application, validate MCP server endpoints, A2A agent cards, x402 payment, and ERC-8004 on-chain identities, and surface a Verified/Plausible/Unverified trust model
- mcp-agent-assessment: Unified 4-layer assessment pipeline that orchestrates all protocol validators into a single score
| Title | Updated | Release | Workflow | Coverage | Issues | License |
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| a2a-agent-validator |  |
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| erc8004-registry-parser |  |
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| mcp-apps-validator |  |
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| ucp-commerce-validator |  |
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| x402-mcp-validator |  |
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- a2a-agent-validator: A2A Protocol agent card discovery and AP2 extension detection
- x402-mcp-validator: x402 payment protocol validation — probes all four schemes (exact, upto, batch-settlement, auth-capture) and MCP connection/version-branch capabilities
- erc8004-registry-parser: ERC-8004 on-chain agent registry parsing and validation
- mcp-apps-validator: MCP Apps UI resource detection and validation
- ucp-commerce-validator: UCP (Universal Commerce Protocol, Google/Shopify) and ACP (Agentic Commerce Protocol, OpenAI/Stripe) validation — fetches
.well-known/ucpand ACP feed/discovery, validates manifest structure, classifies commerce capabilities, and flags the MCP transport