unsupported_media_type

A request to /mcp wasn't sent as JSON.

Status: HTTP 415 · Approvals, the CLI and the connector

What happened

A request to /mcp wasn't sent as JSON.

What to do

Send JSON-RPC with content-type: application/json.

Read more

• unsupported_media_type in the error table
• Get started (dashboard guide)
• The hosted connector
• Changelog: when codes were added or removed