testclient

Overview ¶

Command testclient is the MCP auth conformance test client. It is invoked by the MCP conformance runner via:

npx @modelcontextprotocol/conformance client --command "go run ./cmd/testclient" --suite auth

The conformance runner starts a mock MCP server + mock OAuth AS, then invokes this binary with the server URL appended as an argument. Environment variables:

MCP_CONFORMANCE_SCENARIO — scenario name (e.g., "auth/metadata-default")
MCP_CONFORMANCE_CONTEXT  — JSON with scenario-specific data (e.g., pre-registered credentials)

This client performs the full MCP OAuth flow headlessly (no browser — follows redirects via HTTP) and then sends an initialize request.