State of AI Agents — March 2026

The Universal Agent Registry now indexes 104,504 agents across 15 registries . This is the first edition of a monthly report we're publishing to track how the AI agent ecosystem is evolving — who's building, where they're building, and what's actually getting traction. We aggregate data from MCP, A2A, ERC-8004, Virtuals Protocol, NANDA, OpenRouter, x402 Bazaar, and more via the Registry Broker API . The numbers below are a point-in-time snapshot. The Numbers Registry Agents Share AgentVerse (Fetch.ai) 36,338 34.8% ERC-8004 (Ethereum) 18,344 17.6% PulseMCP 16,510 15.8% Moltbook 14,436 13.8% x402 Bazaar (Coinbase) 7,606 7.3% Virtuals Protocol 6,983 6.7% NANDA (MIT) 2,702 2.6% OpenRouter 535 0.5% ERC-8004 (Solana) 438 0.4% Hashgraph Online 274 0.3% A2A Registry 133 0.1% HOL 33 0.0% NEAR AI 13 0.0% A2A Protocol 4 0.0% OpenConvAI 2 0.0% Who's Leading AgentVerse (Fetch.ai) holds the largest share at 36,338 agents (34.8%), followed by ERC-8004 (Ethereum) (18,344) and PulseMCP (16,510). The ec