refactor(mcp): standard mcpServers input format with type inference

- Accept standard mcpServers item format (command/args/env/url/headers)
- Auto-infer connection type: command -> stdio, url -> http/sse
- Add PUT /bots/:bot_id/mcp/import for batch import from mcpServers dict
- Add GET /bots/:bot_id/mcp/export for standard format export
- Add UpsertMCPConnectionByName SQL for import upsert by name
- Preserve is_active state on import upsert

db/queries/mcp.sql

@@ -28,3 +28,12 @@ RETURNING id, bot_id, name, type, config, is_active, created_at, updated_at;
 -- name: DeleteMCPConnection :exec
 DELETE FROM mcp_connections
 WHERE bot_id = $1 AND id = $2;
+
+-- name: UpsertMCPConnectionByName :one
+INSERT INTO mcp_connections (bot_id, name, type, config)
+VALUES ($1, $2, $3, $4)
+ON CONFLICT (bot_id, name)
+DO UPDATE SET type = EXCLUDED.type,
+              config = EXCLUDED.config,
+              updated_at = now()
+RETURNING id, bot_id, name, type, config, is_active, created_at, updated_at;

internal/db/sqlc/mcp.sql.go

@@ -168,3 +168,41 @@ func (q *Queries) UpdateMCPConnection(ctx context.Context, arg UpdateMCPConnecti
 	)
 	return i, err
 }
+
+const upsertMCPConnectionByName = `-- name: UpsertMCPConnectionByName :one
+INSERT INTO mcp_connections (bot_id, name, type, config)
+VALUES ($1, $2, $3, $4)
+ON CONFLICT (bot_id, name)
+DO UPDATE SET type = EXCLUDED.type,
+              config = EXCLUDED.config,
+              updated_at = now()
+RETURNING id, bot_id, name, type, config, is_active, created_at, updated_at
+`
+
+type UpsertMCPConnectionByNameParams struct {
+	BotID  pgtype.UUID `json:"bot_id"`
+	Name   string      `json:"name"`
+	Type   string      `json:"type"`
+	Config []byte      `json:"config"`
+}
+
+func (q *Queries) UpsertMCPConnectionByName(ctx context.Context, arg UpsertMCPConnectionByNameParams) (McpConnection, error) {
+	row := q.db.QueryRow(ctx, upsertMCPConnectionByName,
+		arg.BotID,
+		arg.Name,
+		arg.Type,
+		arg.Config,
+	)
+	var i McpConnection
+	err := row.Scan(
+		&i.ID,
+		&i.BotID,
+		&i.Name,
+		&i.Type,
+		&i.Config,
+		&i.IsActive,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+	)
+	return i, err
+}

internal/handlers/mcp.go

@@ -35,6 +35,8 @@ func (h *MCPHandler) Register(e *echo.Echo) {
 	group := e.Group("/bots/:bot_id/mcp")
 	group.GET("", h.List)
 	group.POST("", h.Create)
+	group.PUT("/import", h.Import)
+	group.GET("/export", h.Export)
 	group.GET("/:id", h.Get)
 	group.PUT("/:id", h.Update)
 	group.DELETE("/:id", h.Delete)
@@ -215,6 +217,67 @@ func (h *MCPHandler) Delete(c echo.Context) error {
 	return c.NoContent(http.StatusNoContent)
 }
 
+// Import godoc
+// @Summary Import MCP connections
+// @Description Batch import MCP connections from standard mcpServers format. Existing connections (matched by name) get config updated with is_active preserved. New connections are created as active.
+// @Tags mcp
+// @Param payload body mcp.ImportRequest true "mcpServers dict"
+// @Success 200 {object} mcp.ListResponse
+// @Failure 400 {object} ErrorResponse
+// @Failure 403 {object} ErrorResponse
+// @Failure 500 {object} ErrorResponse
+// @Router /bots/{bot_id}/mcp/import [put]
+func (h *MCPHandler) Import(c echo.Context) error {
+	userID, err := h.requireChannelIdentityID(c)
+	if err != nil {
+		return err
+	}
+	botID := strings.TrimSpace(c.Param("bot_id"))
+	if botID == "" {
+		return echo.NewHTTPError(http.StatusBadRequest, "bot id is required")
+	}
+	if _, err := h.authorizeBotAccess(c.Request().Context(), userID, botID); err != nil {
+		return err
+	}
+	var req mcp.ImportRequest
+	if err := c.Bind(&req); err != nil {
+		return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+	}
+	items, err := h.service.Import(c.Request().Context(), botID, req)
+	if err != nil {
+		return echo.NewHTTPError(http.StatusBadRequest, err.Error())
+	}
+	return c.JSON(http.StatusOK, mcp.ListResponse{Items: items})
+}
+
+// Export godoc
+// @Summary Export MCP connections
+// @Description Export all MCP connections for a bot in standard mcpServers format.
+// @Tags mcp
+// @Success 200 {object} mcp.ExportResponse
+// @Failure 400 {object} ErrorResponse
+// @Failure 403 {object} ErrorResponse
+// @Failure 500 {object} ErrorResponse
+// @Router /bots/{bot_id}/mcp/export [get]
+func (h *MCPHandler) Export(c echo.Context) error {
+	userID, err := h.requireChannelIdentityID(c)
+	if err != nil {
+		return err
+	}
+	botID := strings.TrimSpace(c.Param("bot_id"))
+	if botID == "" {
+		return echo.NewHTTPError(http.StatusBadRequest, "bot id is required")
+	}
+	if _, err := h.authorizeBotAccess(c.Request().Context(), userID, botID); err != nil {
+		return err
+	}
+	resp, err := h.service.ExportByBot(c.Request().Context(), botID)
+	if err != nil {
+		return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
+	}
+	return c.JSON(http.StatusOK, resp)
+}
+
 func (h *MCPHandler) requireChannelIdentityID(c echo.Context) (string, error) {
 	return RequireChannelIdentityID(c)
 }

internal/mcp/connections.go

@@ -24,12 +24,34 @@ type Connection struct {
 	UpdatedAt time.Time      `json:"updated_at"`
 }
 
-// UpsertRequest is the payload for creating or updating MCP connections.
+// UpsertRequest accepts standard mcpServers item format.
+// Type is auto-inferred: command present -> stdio, url present -> http (default) or sse (if transport:"sse").
 type UpsertRequest struct {
-	Name   string         `json:"name"`
-	Type   string         `json:"type,omitempty"`
-	Config map[string]any `json:"config"`
-	Active *bool          `json:"is_active,omitempty"`
+	Name      string            `json:"name"`
+	Command   string            `json:"command,omitempty"`
+	Args      []string          `json:"args,omitempty"`
+	Env       map[string]string `json:"env,omitempty"`
+	Cwd       string            `json:"cwd,omitempty"`
+	URL       string            `json:"url,omitempty"`
+	Headers   map[string]string `json:"headers,omitempty"`
+	Transport string            `json:"transport,omitempty"`
+	Active    *bool             `json:"is_active,omitempty"`
+}
+
+// ImportRequest accepts a standard mcpServers dict for batch import.
+type ImportRequest struct {
+	MCPServers map[string]MCPServerEntry `json:"mcpServers"`
+}
+
+// MCPServerEntry is one entry in the standard mcpServers dict.
+type MCPServerEntry struct {
+	Command   string            `json:"command,omitempty"`
+	Args      []string          `json:"args,omitempty"`
+	Env       map[string]string `json:"env,omitempty"`
+	Cwd       string            `json:"cwd,omitempty"`
+	URL       string            `json:"url,omitempty"`
+	Headers   map[string]string `json:"headers,omitempty"`
+	Transport string            `json:"transport,omitempty"`
 }
 
 // ListResponse wraps MCP connection list responses.
@@ -37,6 +59,11 @@ type ListResponse struct {
 	Items []Connection `json:"items"`
 }
 
+// ExportResponse returns connections in standard mcpServers format.
+type ExportResponse struct {
+	MCPServers map[string]MCPServerEntry `json:"mcpServers"`
+}
+
 // ConnectionService handles CRUD operations for MCP connections.
 type ConnectionService struct {
 	queries *sqlc.Queries
@@ -129,7 +156,7 @@ func (s *ConnectionService) Create(ctx context.Context, botID string, req Upsert
 	if name == "" {
 		return Connection{}, fmt.Errorf("name is required")
 	}
-	mcpType, config, err := normalizeMCPType(req)
+	mcpType, config, err := inferTypeAndConfig(req)
 	if err != nil {
 		return Connection{}, err
 	}
@@ -171,7 +198,7 @@ func (s *ConnectionService) Update(ctx context.Context, botID, id string, req Up
 	if name == "" {
 		return Connection{}, fmt.Errorf("name is required")
 	}
-	mcpType, config, err := normalizeMCPType(req)
+	mcpType, config, err := inferTypeAndConfig(req)
 	if err != nil {
 		return Connection{}, err
 	}
@@ -197,6 +224,67 @@ func (s *ConnectionService) Update(ctx context.Context, botID, id string, req Up
 	return normalizeMCPConnection(row)
 }
 
+// Import performs a declarative sync from a standard mcpServers dict.
+// Existing connections (matched by name) get config updated but is_active preserved.
+// New connections are created with is_active=true.
+// Connections not in the input are left untouched.
+func (s *ConnectionService) Import(ctx context.Context, botID string, req ImportRequest) ([]Connection, error) {
+	if s.queries == nil {
+		return nil, fmt.Errorf("mcp queries not configured")
+	}
+	botUUID, err := db.ParseUUID(botID)
+	if err != nil {
+		return nil, err
+	}
+	if len(req.MCPServers) == 0 {
+		return []Connection{}, nil
+	}
+	results := make([]Connection, 0, len(req.MCPServers))
+	for name, entry := range req.MCPServers {
+		name = strings.TrimSpace(name)
+		if name == "" {
+			continue
+		}
+		upsert := entryToUpsertRequest(name, entry)
+		mcpType, config, err := inferTypeAndConfig(upsert)
+		if err != nil {
+			return nil, fmt.Errorf("server %q: %w", name, err)
+		}
+		configPayload, err := json.Marshal(config)
+		if err != nil {
+			return nil, err
+		}
+		row, err := s.queries.UpsertMCPConnectionByName(ctx, sqlc.UpsertMCPConnectionByNameParams{
+			BotID:  botUUID,
+			Name:   name,
+			Type:   mcpType,
+			Config: configPayload,
+		})
+		if err != nil {
+			return nil, fmt.Errorf("server %q: %w", name, err)
+		}
+		conn, err := normalizeMCPConnection(row)
+		if err != nil {
+			return nil, err
+		}
+		results = append(results, conn)
+	}
+	return results, nil
+}
+
+// ExportByBot returns all connections for a bot in standard mcpServers format.
+func (s *ConnectionService) ExportByBot(ctx context.Context, botID string) (ExportResponse, error) {
+	items, err := s.ListByBot(ctx, botID)
+	if err != nil {
+		return ExportResponse{}, err
+	}
+	servers := make(map[string]MCPServerEntry, len(items))
+	for _, conn := range items {
+		servers[conn.Name] = connectionToExportEntry(conn)
+	}
+	return ExportResponse{MCPServers: servers}, nil
+}
+
 // Delete removes an MCP connection.
 func (s *ConnectionService) Delete(ctx context.Context, botID, id string) error {
 	if s.queries == nil {
@@ -247,26 +335,105 @@ func decodeMCPConfig(raw []byte) (map[string]any, error) {
 	return payload, nil
 }
 
-func normalizeMCPType(req UpsertRequest) (string, map[string]any, error) {
-	config := req.Config
-	if config == nil {
-		config = map[string]any{}
+// inferTypeAndConfig builds internal type + config from a standard mcpServers item.
+func inferTypeAndConfig(req UpsertRequest) (string, map[string]any, error) {
+	hasCommand := strings.TrimSpace(req.Command) != ""
+	hasURL := strings.TrimSpace(req.URL) != ""
+
+	if !hasCommand && !hasURL {
+		return "", nil, fmt.Errorf("command or url is required")
 	}
-	mcpType := strings.TrimSpace(req.Type)
-	if mcpType == "" {
-		if raw, ok := config["type"].(string); ok {
-			mcpType = strings.TrimSpace(raw)
+	if hasCommand && hasURL {
+		return "", nil, fmt.Errorf("command and url are mutually exclusive")
+	}
+
+	config := map[string]any{}
+
+	if hasCommand {
+		config["command"] = strings.TrimSpace(req.Command)
+		if len(req.Args) > 0 {
+			config["args"] = req.Args
+		}
+		if len(req.Env) > 0 {
+			config["env"] = req.Env
+		}
+		if strings.TrimSpace(req.Cwd) != "" {
+			config["cwd"] = strings.TrimSpace(req.Cwd)
+		}
+		return "stdio", config, nil
+	}
+
+	config["url"] = strings.TrimSpace(req.URL)
+	if len(req.Headers) > 0 {
+		config["headers"] = req.Headers
+	}
+	transport := strings.ToLower(strings.TrimSpace(req.Transport))
+	if transport == "sse" {
+		return "sse", config, nil
+	}
+	return "http", config, nil
+}
+
+// entryToUpsertRequest converts a named MCPServerEntry to an UpsertRequest.
+func entryToUpsertRequest(name string, entry MCPServerEntry) UpsertRequest {
+	return UpsertRequest{
+		Name:      name,
+		Command:   entry.Command,
+		Args:      entry.Args,
+		Env:       entry.Env,
+		Cwd:       entry.Cwd,
+		URL:       entry.URL,
+		Headers:   entry.Headers,
+		Transport: entry.Transport,
+	}
+}
+
+// connectionToExportEntry converts a stored connection to standard mcpServers entry.
+func connectionToExportEntry(conn Connection) MCPServerEntry {
+	entry := MCPServerEntry{}
+	switch conn.Type {
+	case "stdio":
+		entry.Command, _ = conn.Config["command"].(string)
+		if rawArgs, ok := conn.Config["args"]; ok {
+			switch v := rawArgs.(type) {
+			case []any:
+				for _, a := range v {
+					if s, ok := a.(string); ok {
+						entry.Args = append(entry.Args, s)
+					}
+				}
+			case []string:
+				entry.Args = v
+			}
+		}
+		if rawEnv, ok := conn.Config["env"]; ok {
+			if m, ok := rawEnv.(map[string]any); ok {
+				entry.Env = make(map[string]string, len(m))
+				for k, v := range m {
+					if s, ok := v.(string); ok {
+						entry.Env[k] = s
+					}
+				}
+			}
+		}
+		if cwd, ok := conn.Config["cwd"].(string); ok && cwd != "" {
+			entry.Cwd = cwd
+		}
+	case "http", "sse":
+		entry.URL, _ = conn.Config["url"].(string)
+		if rawHeaders, ok := conn.Config["headers"]; ok {
+			if m, ok := rawHeaders.(map[string]any); ok {
+				entry.Headers = make(map[string]string, len(m))
+				for k, v := range m {
+					if s, ok := v.(string); ok {
+						entry.Headers[k] = s
+					}
+				}
+			}
+		}
+		if conn.Type == "sse" {
+			entry.Transport = "sse"
 		}
 	}
-	mcpType = strings.ToLower(strings.TrimSpace(mcpType))
-	if mcpType == "" {
-		return "", nil, fmt.Errorf("type is required")
-	}
-	switch mcpType {
-	case "stdio", "http", "sse":
-	default:
-		return "", nil, fmt.Errorf("unsupported mcp type: %s", mcpType)
-	}
-	config["type"] = mcpType
-	return mcpType, config, nil
+	return entry
 }

internal/mcp/connections_test.go

@@ -0,0 +1,173 @@
+package mcp
+
+import (
+	"testing"
+)
+
+func TestInferTypeAndConfig_Stdio(t *testing.T) {
+	req := UpsertRequest{
+		Name:    "filesystem",
+		Command: "npx",
+		Args:    []string{"-y", "@modelcontextprotocol/server-filesystem", "/path"},
+		Env:     map[string]string{"TOKEN": "abc"},
+		Cwd:     "/workspace",
+	}
+	typ, config, err := inferTypeAndConfig(req)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if typ != "stdio" {
+		t.Fatalf("expected type stdio, got %s", typ)
+	}
+	if config["command"] != "npx" {
+		t.Fatalf("expected command npx, got %v", config["command"])
+	}
+	args, ok := config["args"].([]string)
+	if !ok || len(args) != 3 {
+		t.Fatalf("expected 3 args, got %v", config["args"])
+	}
+	env, ok := config["env"].(map[string]string)
+	if !ok || env["TOKEN"] != "abc" {
+		t.Fatalf("expected env TOKEN=abc, got %v", config["env"])
+	}
+	if config["cwd"] != "/workspace" {
+		t.Fatalf("expected cwd /workspace, got %v", config["cwd"])
+	}
+}
+
+func TestInferTypeAndConfig_HTTP(t *testing.T) {
+	req := UpsertRequest{
+		Name:    "remote",
+		URL:     "https://example.com/mcp",
+		Headers: map[string]string{"Authorization": "Bearer sk-xxx"},
+	}
+	typ, config, err := inferTypeAndConfig(req)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if typ != "http" {
+		t.Fatalf("expected type http, got %s", typ)
+	}
+	if config["url"] != "https://example.com/mcp" {
+		t.Fatalf("expected url, got %v", config["url"])
+	}
+	headers, ok := config["headers"].(map[string]string)
+	if !ok || headers["Authorization"] != "Bearer sk-xxx" {
+		t.Fatalf("expected headers, got %v", config["headers"])
+	}
+}
+
+func TestInferTypeAndConfig_SSE(t *testing.T) {
+	req := UpsertRequest{
+		Name:      "sse-server",
+		URL:       "https://example.com/sse",
+		Transport: "sse",
+	}
+	typ, _, err := inferTypeAndConfig(req)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if typ != "sse" {
+		t.Fatalf("expected type sse, got %s", typ)
+	}
+}
+
+func TestInferTypeAndConfig_NoCommandNoURL(t *testing.T) {
+	req := UpsertRequest{Name: "empty"}
+	_, _, err := inferTypeAndConfig(req)
+	if err == nil {
+		t.Fatal("expected error for missing command and url")
+	}
+}
+
+func TestInferTypeAndConfig_BothCommandAndURL(t *testing.T) {
+	req := UpsertRequest{
+		Name:    "conflict",
+		Command: "npx",
+		URL:     "https://example.com",
+	}
+	_, _, err := inferTypeAndConfig(req)
+	if err == nil {
+		t.Fatal("expected error for both command and url")
+	}
+}
+
+func TestConnectionToExportEntry_Stdio(t *testing.T) {
+	conn := Connection{
+		Name: "fs",
+		Type: "stdio",
+		Config: map[string]any{
+			"command": "npx",
+			"args":    []any{"-y", "server"},
+			"env":     map[string]any{"KEY": "val"},
+			"cwd":     "/work",
+		},
+	}
+	entry := connectionToExportEntry(conn)
+	if entry.Command != "npx" {
+		t.Fatalf("expected command npx, got %s", entry.Command)
+	}
+	if len(entry.Args) != 2 {
+		t.Fatalf("expected 2 args, got %v", entry.Args)
+	}
+	if entry.Env["KEY"] != "val" {
+		t.Fatalf("expected env KEY=val, got %v", entry.Env)
+	}
+	if entry.Cwd != "/work" {
+		t.Fatalf("expected cwd /work, got %s", entry.Cwd)
+	}
+	if entry.URL != "" {
+		t.Fatalf("expected empty url, got %s", entry.URL)
+	}
+}
+
+func TestConnectionToExportEntry_HTTP(t *testing.T) {
+	conn := Connection{
+		Name: "remote",
+		Type: "http",
+		Config: map[string]any{
+			"url":     "https://example.com/mcp",
+			"headers": map[string]any{"Authorization": "Bearer xxx"},
+		},
+	}
+	entry := connectionToExportEntry(conn)
+	if entry.URL != "https://example.com/mcp" {
+		t.Fatalf("expected url, got %s", entry.URL)
+	}
+	if entry.Headers["Authorization"] != "Bearer xxx" {
+		t.Fatalf("expected headers, got %v", entry.Headers)
+	}
+	if entry.Transport != "" {
+		t.Fatalf("expected empty transport for http, got %s", entry.Transport)
+	}
+}
+
+func TestConnectionToExportEntry_SSE(t *testing.T) {
+	conn := Connection{
+		Name:   "sse",
+		Type:   "sse",
+		Config: map[string]any{"url": "https://example.com/sse"},
+	}
+	entry := connectionToExportEntry(conn)
+	if entry.Transport != "sse" {
+		t.Fatalf("expected transport sse, got %s", entry.Transport)
+	}
+}
+
+func TestEntryToUpsertRequest(t *testing.T) {
+	entry := MCPServerEntry{
+		Command: "npx",
+		Args:    []string{"-y", "server"},
+		Env:     map[string]string{"KEY": "val"},
+	}
+	req := entryToUpsertRequest("test-server", entry)
+	if req.Name != "test-server" {
+		t.Fatalf("expected name test-server, got %s", req.Name)
+	}
+	if req.Command != "npx" {
+		t.Fatalf("expected command npx, got %s", req.Command)
+	}
+	if len(req.Args) != 2 {
+		t.Fatalf("expected 2 args, got %v", req.Args)
+	}
+}