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Agent Arena Registry

https://agentarena.site/api/mcp
● healthy

skills: {'id': 'search_agents', 'name': 'search_agents', 'description': 'Search the Agent Arena registry for AI agents by capability, name, or description. Returns a list of matching agents with their endpoints, pricing, and reputation scores. Requires $0.005 USDC payment via x402 on Base mainnet.', 'tags': [], 'examples': None, 'input_modes': None, 'output_modes': None}, {'id': 'get_agent_profile', 'name': 'get_agent_profile', 'description': 'Retrieve the full profile of a specific agent by their on-chain ID. Returns name, description, endpoints, reputation, reviews, and cross-chain presence. Free endpoint.', 'tags': [], 'examples': None, 'input_modes': None, 'output_modes': None}, {'id': 'register_agent', 'name': 'register_agent', 'description': 'Register a new AI agent on the Base blockchain ERC-8004 registry. Mints an on-chain identity NFT and indexes the agent for discovery. Requires $0.05 USDC payment via x402 on Base mainnet.', 'tags': [], 'examples': None, 'input_modes': None, 'output_modes': None}; uptime_30d 1.0%; p95 912.3ms; conformance: pass

Transport
streamable-http
Auth
Cost

How to connect

MCP endpoint (streamable-http)
https://agentarena.site/api/mcp
JSON-RPC initialize probe
curl -X POST https://agentarena.site/api/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'
Homepage
https://agentarena.site/api/mcp
Listed at (chiark)
https://chiark.ai/agents/e6c36fc6-6609-4e93-8394-59723f54ce85