{"protocol":"mcp","server":{"name":"overwing","title":"Overwing","version":"1.0.0"},"endpoint":"POST https://overwing.ai/mcp","transport":"Streamable HTTP, stateless: one JSON response per POST, no SSE stream, no session id","protocol_versions":["2026-07-28","2025-11-25","2025-06-18"],"connect":{"url":"https://overwing.ai/mcp","legacy":"initialize is supported; send MCP-Protocol-Version on each request (2025-11-25, 2025-06-18)","modern":"No handshake: each request carries its version in params._meta and the MCP-Protocol-Version, Mcp-Method and Mcp-Name headers (2026-07-28)","claude_code":"claude mcp add --transport http overwing https://overwing.ai/mcp"},"capabilities":["tools"],"tools":["evaluate","evaluate_batch","list_rule_sets","get_rule_set","create_rule_set","get_evaluation","list_evaluations","get_usage","whoami","list_plans","atlas_lookup","atlas_agents","atlas_summary","beacon_start","beacon_report","beacon_sample","tower_load_template","tower_create_agent","tower_list_agents","tower_revoke_agent","tower_capabilities","tower_decide","tower_submit_action","tower_get_action","tower_compensate","tower_get_receipt","tower_verify_receipts"],"tools_without_a_key":["evaluate","list_plans","atlas_lookup","atlas_summary","beacon_start","beacon_report","beacon_sample"],"access":"No key needed for evaluate, list_plans, atlas_lookup, atlas_summary, beacon_start, beacon_report, beacon_sample (evaluate and atlas_lookup: 10 a day each). Authorization: Bearer ow_live_... for the rest; Tower action tools take an agent key, ow_agent_.... POST https://overwing.ai/api/v1/signup issues a key","card":"https://overwing.ai/.well-known/mcp.json","guide":"https://overwing.ai/llms.txt"}