Execution Market A2A Agent
A2A protocol 0.3.0 JSON-RPC agent at api.execution.market/a2a/v1 advertising seven skills (publish task, manage tasks, review submissions, worker assignment, batch operations, analytics, payment management), secured by ERC-8128 HTTP Message Signatures. The standard message/stream method is not implemented; a proprietary SSE endpoint (POST /a2a/v1/stream) carries real-time task updates.