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The open catalog of everything agents can buy, call, or install — x402, MPP, MCP, and skills.
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browse all →TgPay Merchant API
Accept crypto payments via the TgPay Merchant API — invoices, subscriptions, webhooks.
SigRank — AI Operator Benchmarking
SigRank benchmark MCP: cascade metrics, leaderboard, operator profiles, simulation, diagnostics.
OPC UA Modeler
OPC UA companion spec types, namespace dependencies, and engineering units for AI agents
codeindex
Structural code intelligence over MCP: symbols, callers, imports and blast radius, 40+ languages.
atx-mcp
Deterministic, non-generative image transform MCP server: reproducible recipes, immutable originals.
Deckaura Tarot
Explore 78 tarot cards with meanings, card draws, spreads, and Deckaura guide links.
Content Moderation API
Pay-per-call profanity/explicit-content detection for AI agents