diff --git a/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/EndpointGenerator.scala b/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/EndpointGenerator.scala
index 239a0f77b8..bb1f64f8ca 100644
--- a/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/EndpointGenerator.scala
+++ b/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/EndpointGenerator.scala
@@ -1,6 +1,13 @@
 package sttp.tapir.codegen
 import sttp.tapir.codegen.BasicGenerator.{indent, mapSchemaSimpleTypeToType}
-import sttp.tapir.codegen.openapi.models.OpenapiModels.{OpenapiDocument, OpenapiParameter, OpenapiPath, OpenapiRequestBody, OpenapiResponse}
+import sttp.tapir.codegen.openapi.models.OpenapiModels.{
+  OpenapiDocument,
+  OpenapiParameter,
+  OpenapiPath,
+  OpenapiRequestBody,
+  OpenapiResponse,
+  SpecificationExtensionValue
+}
 import sttp.tapir.codegen.openapi.models.OpenapiSchemaType.{
   OpenapiSchemaArray,
   OpenapiSchemaBinary,
@@ -68,6 +75,18 @@ class EndpointGenerator {
       .map(_.withResolvedParentParameters(parameters, p.parameters))
       .map { m =>
         implicit val location: Location = Location(p.url, m.methodType)
+
+        val attributeString = {
+          val pathAttributes = attributes(p.specificationExtensions)
+          val operationAttributes = attributes(m.specificationExtensions)
+          (pathAttributes, operationAttributes) match {
+            case (None, None)                          => ""
+            case (Some(atts), None)                    => indent(2)(atts)
+            case (None, Some(atts))                    => indent(2)(atts)
+            case (Some(pathAtts), Some(operationAtts)) => indent(2)(pathAtts + "\n" + operationAtts)
+          }
+        }
+
         val definition =
           s"""|endpoint
               |  .${m.methodType}
@@ -76,6 +95,7 @@ class EndpointGenerator {
               |${indent(2)(ins(m.resolvedParameters, m.requestBody))}
               |${indent(2)(outs(m.responses))}
               |${indent(2)(tags(m.tags))}
+              |$attributeString
               |""".stripMargin.linesIterator.filterNot(_.trim.isEmpty).mkString("\n")
 
         val name = m.operationId
@@ -196,6 +216,11 @@ class EndpointGenerator {
     openapiTags.map(_.distinct.mkString(".tags(List(\"", "\", \"", "\"))")).mkString
   }
 
+  private def attributes(atts: Map[String, SpecificationExtensionValue]): Option[String] = if (atts.nonEmpty) Some {
+    atts.map { case (k, v) => s""".attribute[${v.tpe}](new AttributeKey[${v.tpe}]("${k}"), ${v.render})""" }.mkString("\n")
+  }
+  else None
+
   // treats redirects as ok
   private val okStatus = """([23]\d\d)""".r
   private val errorStatus = """([45]\d\d)""".r
diff --git a/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/openapi/models/OpenapiModels.scala b/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/openapi/models/OpenapiModels.scala
index 95ce6062d3..83dbc678a3 100644
--- a/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/openapi/models/OpenapiModels.scala
+++ b/openapi-codegen/core/src/main/scala/sttp/tapir/codegen/openapi/models/OpenapiModels.scala
@@ -6,14 +6,42 @@ import cats.syntax.either._
 import OpenapiSchemaType.OpenapiSchemaRef
 // https://swagger.io/specification/
 object OpenapiModels {
-  sealed trait SpecificationExtensionValue
-  case object SpecificationExtensionValueNull extends SpecificationExtensionValue
-  case class SpecificationExtensionValueBoolean(value: Boolean) extends SpecificationExtensionValue
-  case class SpecificationExtensionValueLong(value: Long) extends SpecificationExtensionValue
-  case class SpecificationExtensionValueDouble(value: Double) extends SpecificationExtensionValue
-  case class SpecificationExtensionValueString(value: String) extends SpecificationExtensionValue
-  case class SpecificationExtensionValueList(values: Seq[SpecificationExtensionValue]) extends SpecificationExtensionValue
-  case class SpecificationExtensionValueMap(kvs: Map[String, SpecificationExtensionValue]) extends SpecificationExtensionValue
+  sealed trait SpecificationExtensionValue {
+    def tpe: String
+    def render: String
+    def value: Any
+  }
+  case object SpecificationExtensionValueNull extends SpecificationExtensionValue {
+    val tpe = "Null"
+    val render = "null"
+    val value = null
+  }
+  case class SpecificationExtensionValueBoolean(value: Boolean) extends SpecificationExtensionValue {
+    val render = value.toString
+    val tpe = "Boolean"
+  }
+  case class SpecificationExtensionValueLong(value: Long) extends SpecificationExtensionValue {
+    val render = s"${value}L"
+    val tpe = "Long"
+  }
+  case class SpecificationExtensionValueDouble(value: Double) extends SpecificationExtensionValue {
+    val render = s"${value}d"
+    val tpe = "Double"
+  }
+  case class SpecificationExtensionValueString(value: String) extends SpecificationExtensionValue {
+    val render = '"' +: value :+ '"'
+    val tpe = "String"
+  }
+  case class SpecificationExtensionValueList(values: Seq[SpecificationExtensionValue]) extends SpecificationExtensionValue {
+    val render = s"Vector(${values.map(_.render).mkString(", ")})"
+    def tpe = values.map(_.tpe).distinct match { case single +: Nil => s"Seq[$single]"; case _ => "Seq[Any]" }
+    def value = values.map(_.value)
+  }
+  case class SpecificationExtensionValueMap(kvs: Map[String, SpecificationExtensionValue]) extends SpecificationExtensionValue {
+    val render = s"Map(${kvs.map { case (k, v) => s""""$k" -> ${v.render}""" }.mkString(", ")})"
+    def tpe = kvs.values.map(_.tpe).toSeq.distinct match { case single +: Nil => s"Map[String, $single]"; case _ => "Map[String, Any]" }
+    def value = kvs.map { case (k, v) => k -> v.value }
+  }
 
   sealed trait Resolvable[T] {
     def resolve(input: Map[String, T]): T
diff --git a/openapi-codegen/core/src/test/scala/sttp/tapir/codegen/EndpointGeneratorSpec.scala b/openapi-codegen/core/src/test/scala/sttp/tapir/codegen/EndpointGeneratorSpec.scala
index e5bab6ecf6..f858a14fb7 100644
--- a/openapi-codegen/core/src/test/scala/sttp/tapir/codegen/EndpointGeneratorSpec.scala
+++ b/openapi-codegen/core/src/test/scala/sttp/tapir/codegen/EndpointGeneratorSpec.scala
@@ -249,4 +249,29 @@ class EndpointGeneratorSpec extends CompileCheckTestBase {
     generatedCode shouldCompile ()
   }
 
+  it should "generate attributes for specification extensions on path and operation objects" in {
+    val doc = TestHelpers.specificationExtensionDocs
+    val generatedCode = BasicGenerator.generateObjects(
+      doc,
+      "sttp.tapir.generated",
+      "TapirGeneratedEndpoints",
+      targetScala3 = false,
+      useHeadTagForObjectNames = false,
+      jsonSerdeLib = "circe"
+    )("TapirGeneratedEndpoints")
+    generatedCode should include(
+      """.attribute[String](new AttributeKey[String]("custom-string-extension-on-path"), "foobar")"""
+    )
+    generatedCode should include(
+      """.attribute[String](new AttributeKey[String]("custom-string-extension-on-operation"), "bazquux")"""
+    )
+    generatedCode should include(
+      """.attribute[Seq[String]](new AttributeKey[Seq[String]]("custom-list-extension-on-operation"), Vector("baz", "quux"))"""
+    )
+    generatedCode should include(
+      """.attribute[Map[String, Any]](new AttributeKey[Map[String, Any]]("custom-map-extension-on-path"), Map("bazkey" -> "bazval", "quuxkey" -> Vector("quux1", "quux2"))"""
+    )
+    generatedCode shouldCompile ()
+  }
+
 }