MCPJungleMetaMCP and MCPJungle are both lightweight MCP aggregators. MetaMCP has a three-level Servers-Namespaces-Endpoints hierarchy with OIDC discovery; MCPJungle is simpler with API-key-only auth and YAML configuration.
ContextForgeContextForge and MetaMCP are both MCP federation gateways. ContextForge is IBM's Apache 2.0 platform with Cedar-based RBAC, 40+ plugins, and a heavier operational footprint; MetaMCP is MIT with a simpler Servers-Namespaces-Endpoints model and lighter deployment.