diff --git a/cpa-repo/src/main/kotlin/no/nav/emottak/cpa/App.kt b/cpa-repo/src/main/kotlin/no/nav/emottak/cpa/App.kt
index 22832c80..d7b130a1 100644
--- a/cpa-repo/src/main/kotlin/no/nav/emottak/cpa/App.kt
+++ b/cpa-repo/src/main/kotlin/no/nav/emottak/cpa/App.kt
@@ -14,6 +14,7 @@ import io.ktor.server.routing.get
 import no.nav.emottak.cpa.config.DatabaseConfig
 import no.nav.emottak.cpa.config.mapHikariConfig
 import no.nav.emottak.melding.model.Header
+import no.nav.emottak.melding.model.SignatureDetailsRequest
 import no.nav.emottak.melding.model.ValidationResult
 
 fun main() {
@@ -47,17 +48,13 @@ fun Application.myApplicationModule() {
             call.respond(partyInfo.getCertificateForEncryption())
         }
 
-        get("/cpa/{$CPA_ID}/party/{$PARTY_TYPE}/{$PARTY_ID}/signing/certificate/{$ROLE}/{$SERVICE}/{$ACTION}") {
-            val cpaId = call.parameters[CPA_ID] ?: throw BadRequestException("Mangler $CPA_ID")
-            val partyType = call.parameters[PARTY_TYPE] ?: throw BadRequestException("Mangler $PARTY_TYPE")
-            val partyId = call.parameters[PARTY_ID] ?: throw BadRequestException("Mangler $PARTY_ID")
-            val role = call.parameters[ROLE] ?: throw BadRequestException("Mangler $ROLE")
-            val service = call.parameters[SERVICE] ?: throw BadRequestException("Mangler $SERVICE")
-            val action = call.parameters[ACTION] ?: throw BadRequestException("Mangler $ACTION")
-            val cpa = getCpa(cpaId) ?: throw NotFoundException("Ingen CPA med ID $cpaId funnet")
-            val partyInfo = cpa.getPartyInfoByTypeAndID(partyType, partyId)
+        post("/signing/certificate") {
+            val signatureDetailsRequest = call.receive(SignatureDetailsRequest::class)
+            val cpa = getCpa(signatureDetailsRequest.cpaId) ?: throw NotFoundException("Ingen CPA med ID ${signatureDetailsRequest.cpaId} funnet")
+            val partyInfo = cpa.getPartyInfoByTypeAndID(signatureDetailsRequest.partyType, signatureDetailsRequest.partyId)
 
-            call.respond(partyInfo.getCertificateForSignatureValidation(role, service, action))
+            call.respond(partyInfo.getCertificateForSignatureValidation(
+                signatureDetailsRequest.role, signatureDetailsRequest.service, signatureDetailsRequest.action))
         }
     }
 }
diff --git a/ebms-provider/src/main/kotlin/no/nav/emottak/ebms/HttpClientUtil.kt b/ebms-provider/src/main/kotlin/no/nav/emottak/ebms/HttpClientUtil.kt
index 5a703247..4b01f706 100644
--- a/ebms-provider/src/main/kotlin/no/nav/emottak/ebms/HttpClientUtil.kt
+++ b/ebms-provider/src/main/kotlin/no/nav/emottak/ebms/HttpClientUtil.kt
@@ -14,6 +14,7 @@ import no.nav.emottak.melding.model.Header
 import no.nav.emottak.melding.model.PayloadRequest
 import no.nav.emottak.melding.model.PayloadResponse
 import no.nav.emottak.melding.model.SignatureDetails
+import no.nav.emottak.melding.model.SignatureDetailsRequest
 import no.nav.emottak.melding.model.ValidationResult
 import org.oasis_open.committees.ebxml_msg.schema.msg_header_2_0.MessageHeader
 
@@ -32,7 +33,15 @@ fun getPublicSigningDetails(messageHeader: MessageHeader): SignatureDetails = ru
 }
 
 suspend fun getPublicSigningDetails(cpaId: String, partyType: String, partyId: String, service: String, action: String, role: String): SignatureDetails {
-    return httpClientUtil.makeHttpRequest("$cpaRepoEndpoint/cpa/$cpaId/party/$partyType/$partyId/signing/certificate/$role/$service/$action").body<SignatureDetails>()
+    val request = SignatureDetailsRequest(
+        cpaId = cpaId,
+        partyType = partyType,
+        partyId = partyId,
+        role = role,
+        service = service,
+        action = action
+    )
+    return httpClientUtil.postSignatureDetailsRequest("$cpaRepoEndpoint/signing/certificate", request)
 }
 
 class HttpClientUtil {
@@ -56,6 +65,13 @@ class HttpClientUtil {
         }.body()
     }
 
+    suspend fun postSignatureDetailsRequest(urlString: String, request: SignatureDetailsRequest): SignatureDetails {
+        return client.post(urlString) {
+            setBody(request)
+            contentType(Json)
+        }.body()
+    }
+
     suspend fun makeHttpRequest(urlString: String): HttpResponse {
         val response: HttpResponse = client.request(urlString) {
             method = HttpMethod.Get
diff --git a/felles/src/main/kotlin/no/nav/emottak/melding/model/SignatureDetails.kt b/felles/src/main/kotlin/no/nav/emottak/melding/model/SignatureDetails.kt
index 9bb6850a..30e8a24c 100644
--- a/felles/src/main/kotlin/no/nav/emottak/melding/model/SignatureDetails.kt
+++ b/felles/src/main/kotlin/no/nav/emottak/melding/model/SignatureDetails.kt
@@ -5,3 +5,13 @@ data class SignatureDetails(
     val signatureAlgorithm: String,
     val hashFunction: String
 )
+
+
+data class SignatureDetailsRequest(
+    val cpaId: String,
+    val partyType: String,
+    val partyId: String,
+    val role: String,
+    val service: String,
+    val action: String
+)
\ No newline at end of file