HTTP+JSON (REST) binding — removed in v1.1

Removed in v1.1 — AAP is JSON-RPC only

The HTTP+JSON (REST) binding is no longer part of AAP as of v1.1. AAP rides on a single transport: the JSON-RPC 2.0 binding (A2A Section 9). There is no POST /message:send REST surface in AAP; SendMessage is invoked exclusively over JSON-RPC.

This page is kept only so existing links do not 404. For the current, normative transport, see the JSON-RPC 2.0 binding.

In AAP v1.0, a dealer agent MAY have additionally exposed an optional HTTP+JSON interface alongside its required JSON-RPC interface. AAP v1.1 drops that option: every AAP agent speaks JSON-RPC 2.0, and only JSON-RPC 2.0. Buyer agents and dealer agents MUST use the JSON-RPC binding.