Where MPL fits

MPL is not a replacement for a transport protocol. It's a layer that adds typed contracts, quality measurement, and audit trails on top of whatever transport you're using. The comparisons below are deliberately narrow — we only contrast the protocol layer, not the surrounding tooling.

• mpl vs MCP

  MCP defines how an agent talks to a tool server. MPL is the contract/quality/audit layer that runs on top.

• mpl vs A2A

  A2A defines peer-to-peer agent messaging. MPL is what makes those messages typed, scored, and provable.

More comparisons land as we ship them. Each row is sourced to public docs.