diff --git a/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt b/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt
new file mode 100644
index 0000000..88b4ae5
--- /dev/null
+++ b/src/main/kotlin/fr/dcproject/application/http/HttpErrorBadRequest.kt
@@ -0,0 +1,35 @@
+package fr.dcproject.application.http
+
+import fr.dcproject.application.http.HttpErrorBadRequest.InvalidParam
+import io.konform.validation.ValidationResult
+import io.ktor.http.HttpStatusCode
+
+class BadRequestException(val httpError: HttpErrorBadRequest) : Exception()
+
+class HttpErrorBadRequest(
+    statusCode: HttpStatusCode,
+    val title: String = statusCode.description,
+    val invalidParams: List<InvalidParam>,
+) {
+    val statusCode: Int = statusCode.value
+    data class InvalidParam(
+        val name: String,
+        val reason: String
+    )
+}
+
+fun ValidationResult<*>.toOutput() = HttpErrorBadRequest(
+    HttpStatusCode.BadRequest,
+    invalidParams = this.errors.map {
+        InvalidParam(
+            it.dataPath,
+            it.message
+        )
+    }
+)
+
+fun ValidationResult<*>.badRequestIfNotValid() {
+    if (errors.size > 0) {
+        throw BadRequestException(toOutput())
+    }
+}
diff --git a/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt b/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
index 319c0ee..76aa5bf 100644
--- a/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
+++ b/src/main/kotlin/fr/dcproject/application/http/HttpStatusError.kt
@@ -4,14 +4,11 @@ import com.github.jasync.sql.db.postgresql.exceptions.GenericDatabaseException
 import fr.dcproject.common.security.AccessDeniedException
 import fr.dcproject.component.auth.ForbiddenException
 import fr.dcproject.component.auth.user
-import io.konform.validation.ValidationResult
-import io.ktor.application.ApplicationCall
 import io.ktor.application.call
 import io.ktor.features.NotFoundException
 import io.ktor.features.StatusPages
 import io.ktor.http.HttpStatusCode
 import io.ktor.response.respond
-import io.ktor.util.pipeline.PipelineContext
 import java.util.concurrent.CompletionException
 
 class HttpError(
@@ -20,8 +17,6 @@ class HttpError(
     val type: String? = null,
     val title: String = cause?.message ?: statusCode.description,
     val detail: String? = null,
-    val invalidParams: List<InvalidParam>? = null,
-    val stackTrace: String? = cause?.stackTraceToString()
 ) {
     val statusCode: Int = statusCode.value
     data class InvalidParam(
@@ -30,30 +25,6 @@ class HttpError(
     )
 }
 
-fun ValidationResult<*>.toOutput(): HttpError {
-    return HttpError(
-        HttpStatusCode.BadRequest,
-        invalidParams = this.errors.map {
-            HttpError.InvalidParam(
-                it.dataPath,
-                it.message
-            )
-        }
-    )
-}
-
-suspend fun PipelineContext<*, ApplicationCall>.respondIfNotValid(validationResult: ValidationResult<*>): HttpError? {
-    if (validationResult.errors.size > 0) {
-        val out = validationResult.toOutput()
-        this.call.respond(
-            HttpStatusCode.BadRequest,
-            out
-        )
-        return out
-    }
-    return null
-}
-
 fun statusPagesInstallation(): StatusPages.Configuration.() -> Unit = {
     exception<CompletionException> { e ->
         val parent = e.cause?.cause
@@ -106,4 +77,7 @@ fun statusPagesInstallation(): StatusPages.Configuration.() -> Unit = {
             call.respond(HttpStatusCode.Forbidden, it)
         }
     }
+    exception<BadRequestException> { e ->
+        call.respond(HttpStatusCode.BadRequest, e.httpError)
+    }
 }
diff --git a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
index c1df6d6..2d8bd9a 100644
--- a/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
+++ b/src/main/kotlin/fr/dcproject/component/article/routes/FindArticles.kt
@@ -1,6 +1,6 @@
 package fr.dcproject.component.article.routes
 
-import fr.dcproject.application.http.respondIfNotValid
+import fr.dcproject.application.http.badRequestIfNotValid
 import fr.dcproject.common.response.toOutput
 import fr.dcproject.common.security.assert
 import fr.dcproject.common.validation.isUuid
@@ -74,7 +74,7 @@ object FindArticles {
 
     fun Route.findArticles(repo: ArticleRepository, ac: ArticleAccessControl) {
         get<ArticlesRequest> {
-            respondIfNotValid(it.validate())?.apply { return@get }
+            it.validate().badRequestIfNotValid()
 
             repo.findArticles(it)
                 .apply { ac.assert { canView(result, citizenOrNull) } }
diff --git a/src/main/resources/openapi.yaml b/src/main/resources/openapi.yaml
index e453251..7ce9bab 100644
--- a/src/main/resources/openapi.yaml
+++ b/src/main/resources/openapi.yaml
@@ -134,6 +134,12 @@ paths:
       tags:
         - article
       operationId: getArticle
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/sort'
+        - $ref: '#/components/parameters/direction'
+        - $ref: '#/components/parameters/search'
       responses:
         200:
           description: The Article objects
@@ -149,6 +155,12 @@ paths:
       tags:
         - article
       operationId: getArticleVersions
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/sort'
+        - $ref: '#/components/parameters/direction'
+        - $ref: '#/components/parameters/search'
       responses:
         200:
           description: The versions of Article
@@ -2224,20 +2236,8 @@ components:
       properties:
         statusCode:
           type: integer
-        type:
-          type: string
-          nullable: true
         title:
           type: string
-        detail:
-          type: string
-          nullable: true
-        cause:
-          type: string
-          nullable: true
-        stackTrace:
-          type: string
-          nullable: true
         invalidParams:
           type: array
           items: