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/.well-known/mcp/server-card.json

SEP-1649 MCP Server Card; protocolVersion matches capabilities, transport URL resolves to a real MCP JSON-RPC endpoint on this host

chaos chaos.catastrophic.io

GET /.well-known/mcp/server-card.json

Parametric chaos for the SEP-1649 MCP Server Card — the well-known document AI agents check to learn what tools, prompts, and resources an MCP server claims to offer. Default mode is a card with capabilities but no transport field; other modes cover protocol-version mismatch, dead transport URLs, and schema-invalid documents.

modes: missing-transport version-mismatch transport-404 invalid-schema

full chaos docs →

control not.catastrophic.io

GET /.well-known/mcp/server-card.json

SEP-1649 MCP Server Card; protocolVersion matches capabilities, transport URL resolves to a real MCP JSON-RPC endpoint on this host

full control docs →

Build against not.catastrophic.io/.well-known/mcp/server-card.json, then flip the hostname to chaos.catastrophic.io to exercise the chaos.