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Add Accept header for HTTP MCP backend session establishment #183

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Merged
lpcox merged 2 commits into from
Jan 12, 2026
Merged

Add Accept header for HTTP MCP backend session establishment #183

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251d048
Initial plan
Copilot Jan 12, 2026
2d6fd90
Add Accept header to HTTP MCP server requests
Copilot Jan 12, 2026
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2 changes: 2 additions & 0 deletions internal/mcp/connection.go
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Original file line number Diff line number Diff line change
Expand Up @@ -460,6 +460,7 @@ func (c *Connection) initializeHTTPSession() (string, error) {

// Set headers
httpReq.Header.Set("Content-Type", "application/json")
httpReq.Header.Set("Accept", "application/json, text/event-stream")

// Generate a temporary session ID for the initialize request
// Some backends may require this header even during initialization
Expand Down Expand Up @@ -545,6 +546,7 @@ func (c *Connection) sendHTTPRequest(ctx context.Context, method string, params

// Set headers
httpReq.Header.Set("Content-Type", "application/json")
httpReq.Header.Set("Accept", "application/json, text/event-stream")

// Add Mcp-Session-Id header with priority:
// 1) Context session ID (if explicitly provided for this request)
Expand Down