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Mify uses OpenAPI specification to simplify creating API between services and frontends. Check it out to find out how to use it or use this example, and here we'll describe additional features that our generation provides on top.

Middlewares and ServiceExtra

In internal/<service-name>/app/router/router.go you can see this layout:

// vim: set ft=go:

package app

import (


type routerConfig struct {
	Middlewares []func(http.Handler) http.Handler

func NewRouterConfig(ctx *core.MifyServiceContext) *routerConfig {
	return &routerConfig {
		Middlewares: []func(http.Handler) http.Handler {
		// Add your middlewares here

In NewRouterConfig you can add your custom middlewares e.g. for auth.

To add some dependencies which are bootstrapping for each request you can use file internal/<service-name>/app/request_extra.go and this dependency will be available in the MifyRequestContext struct. For dependencies which are bootstrapping for service one time during initialization you can use internal/<service-name>/app/service_extra.go and this dependency will be available in the MifyServiceContext struct (which is nested in MifyRequestContext)

Swagger UI

Swagger UI is available for every backend service on maintenance port (you can get it from the service startup logs). To be able to call API from it, add your local and prod service url to schemas/<service-name>/api/api.yaml to servers field.