observatory vs Plain
Neck and neck on boosts. Profiles, pricing and deals below.
Independent drift detection for public MCP servers - free, read-only, reproducible.
community boosts
⚡ 0
pricing
Freemium · Free public API
what it is
Dominion Observatory - independent, read-only measurement of public MCP servers. Signed tool-definition captures, canonicalization-hashed so any third party can recompute them, and drift detection when a server's tools change. Free public API, no account required.
Support built for B2B and developer tools
community boosts
⚡ 0
pricing
Paid
what it is
Plain is a lean, API-first support platform designed for technical products: shared inbox, Slack-native workflows and customer context pulled from your own systems. Support tooling that feels like an engineering tool.