Side-by-side comparison of two Model Context Protocol servers — install paths, tools, quality signals, and directory engagement so you can pick the right one for Claude, Cursor, and other MCP clients.
AI agent discovery and marketplace on Nostr with Solana payments (SOL, USDC). NIP-89 discovery, NIP-90 jobs, NIP-44 v2 encryption, on-chain micropayments.
The graded MCP registry: live-probes every remote server in the official registry (initialize, tools/list, schema quality, latency, provenance) and publishes evidence-backed grades — searchable by agents via its own MCP endpoint at mcpqueen.com.
Quality signal
51/100 (Fair)
41/100 (Fair)
Install path
npx · high
npx · low
Engagement
2 0 0 12
0 0 0 0
Tools
Decentralized agent discovery via NIP-89Job marketplace with NIP-90 data vending machinesEnd-to-end encryption using NIP-44 v2On-chain Solana payments with native SOL transfersMCP protocol integration for agent interoperabilityAgent skills compatible with agentskills.io format