Whether a JSON-RPC batch (array body) is permitted on the Streamable HTTP
POST endpoint for the given effective protocol version.
JSON-RPC batching was introduced in 2025-03-26 and REMOVED thereafter:
2025-06-18 / 2025-11-25 / draft all state "The body of the POST request MUST
be a single JSON-RPC request, notification, or response" (basic/transports
§Sending Messages), and their JSONRPCMessage schema no longer includes the
batch union members. So batches are accepted ONLY for 2025-03-26 back-compat;
every newer version MUST reject an array body with 400 Bad Request.
Whether a JSON-RPC batch (array body) is permitted on the Streamable HTTP POST endpoint for the given effective protocol version.
JSON-RPC batching was introduced in 2025-03-26 and REMOVED thereafter: 2025-06-18 / 2025-11-25 / draft all state "The body of the POST request MUST be a single JSON-RPC request, notification, or response" (basic/transports §Sending Messages), and their JSONRPCMessage schema no longer includes the batch union members. So batches are accepted ONLY for 2025-03-26 back-compat; every newer version MUST reject an array body with 400 Bad Request.