diff --git a/backend/src/@types/knex.d.ts b/backend/src/@types/knex.d.ts
index 7dcd63c0e..8a19670f0 100644
--- a/backend/src/@types/knex.d.ts
+++ b/backend/src/@types/knex.d.ts
@@ -722,6 +722,17 @@ declare module "knex/types/tables" {
       TPkiAcmeAccountsInsert,
       TPkiAcmeAccountsUpdate
     >;
+    [TableName.PkiAcmeOrder]: KnexOriginal.CompositeTableType<
+      TPkiAcmeOrders,
+      TPkiAcmeOrdersInsert,
+      TPkiAcmeOrdersUpdate
+    >;
+    [TableName.PkiAcmeAuth]: KnexOriginal.CompositeTableType<TPkiAcmeAuths, TPkiAcmeAuthsInsert, TPkiAcmeAuthsUpdate>;
+    [TableName.PkiAcmeChallenge]: KnexOriginal.CompositeTableType<
+      TPkiAcmeChallenges,
+      TPkiAcmeChallengesInsert,
+      TPkiAcmeChallengesUpdate
+    >;
     [TableName.CertificateTemplateEstConfig]: KnexOriginal.CompositeTableType<
       TCertificateTemplateEstConfigs,
       TCertificateTemplateEstConfigsInsert,
diff --git a/backend/src/db/migrations/20251027234547_add-pki-acme.ts b/backend/src/db/migrations/20251027234547_add-pki-acme.ts
index 781fe040e..285676c8f 100644
--- a/backend/src/db/migrations/20251027234547_add-pki-acme.ts
+++ b/backend/src/db/migrations/20251027234547_add-pki-acme.ts
@@ -56,6 +56,7 @@ export async function up(knex: Knex): Promise<void> {
       // Multi-value emails array
       t.specificType("emails", "text[]").notNullable();
 
+      // TODO: make public key a string instead of jsonb to make indexing much easier
       // Public key (JWK format)
       t.jsonb("publicKey").notNullable();
       // The JWS algorithm used to sign the public key when creating the account, e.g. "RS256", "ES256", "PS256", etc.
diff --git a/backend/src/ee/routes/v1/pki-acme-router.ts b/backend/src/ee/routes/v1/pki-acme-router.ts
index e0762b7f3..8361fd330 100644
--- a/backend/src/ee/routes/v1/pki-acme-router.ts
+++ b/backend/src/ee/routes/v1/pki-acme-router.ts
@@ -2,6 +2,7 @@
 import { z } from "zod";
 
 import {
+  CreateAcmeAccountBodySchema,
   CreateAcmeAccountResponseSchema,
   CreateAcmeOrderResponseSchema,
   CreateAcmeOrderSchema,
@@ -27,6 +28,7 @@ import { TCreateAcmeAccountPayload, TRawJwsPayload } from "@app/ee/services/pki-
 import { ApiDocsTags } from "@app/lib/api-docs";
 import { getConfig } from "@app/lib/config/env";
 import { readLimit, writeLimit } from "@app/server/config/rateLimiter";
+import { AcmeBadPublicKeyError } from "@app/ee/services/pki-acme/pki-acme-errors";
 
 export const registerPkiAcmeRouter = async (server: FastifyZodProvider) => {
   const appCfg = getConfig();
@@ -111,13 +113,24 @@ export const registerPkiAcmeRouter = async (server: FastifyZodProvider) => {
       }
     },
     handler: async (req, res) => {
-      const { payload, jwk } = await server.services.pkiAcme.validateCreateAcmeAccountJwsPayload(
-        req.body as TRawJwsPayload
+      const { payload, protectedHeader, jwk } = await server.services.pkiAcme.validateJwsPayload(
+        req.body as TRawJwsPayload,
+        async (protectedHeader) => {
+          if (!protectedHeader.jwk) {
+            throw new AcmeBadPublicKeyError({ detail: "JWK is required in the protected header" });
+          }
+          return protectedHeader.jwk as unknown as JsonWebKey;
+        },
+        CreateAcmeAccountBodySchema
       );
+      if (!jwk) {
+        throw new AcmeBadPublicKeyError({ detail: "JWK is required in the protected header" });
+      }
       const { status, body, headers } = await server.services.pkiAcme.createAcmeAccount(
         req.params.profileId,
+        protectedHeader.alg,
         jwk,
-        payload as TCreateAcmeAccountPayload
+        payload
       );
       // TODO: DRY
       res.code(status);
diff --git a/backend/src/ee/services/pki-acme/pki-acme-schemas.ts b/backend/src/ee/services/pki-acme/pki-acme-schemas.ts
index 599203dae..7e50b2108 100644
--- a/backend/src/ee/services/pki-acme/pki-acme-schemas.ts
+++ b/backend/src/ee/services/pki-acme/pki-acme-schemas.ts
@@ -20,11 +20,6 @@ export const RawJwsPayloadSchema = z.object({
   signature: z.string()
 });
 
-export const JwsPayloadSchema = z.object({
-  protectedHeader: ProtectedHeaderSchema,
-  payload: z.unknown()
-});
-
 // Directory endpoint
 export const GetAcmeDirectorySchema = z.object({
   params: z.object({
diff --git a/backend/src/ee/services/pki-acme/pki-acme-service.ts b/backend/src/ee/services/pki-acme/pki-acme-service.ts
index 57aa504b3..b75a76979 100644
--- a/backend/src/ee/services/pki-acme/pki-acme-service.ts
+++ b/backend/src/ee/services/pki-acme/pki-acme-service.ts
@@ -81,7 +81,8 @@ export const pkiAcmeServiceFactory = ({
         if (protectedHeader === undefined) {
           throw new AcmeMalformedError({ detail: "Protected header is required" });
         }
-        ProtectedHeaderSchema.parse(protectedHeader);
+        const parsedHeader = ProtectedHeaderSchema.parse(protectedHeader);
+        // TODO: consume the nonce here
         const jwk = await getJWK(protectedHeader);
         return await importJWK(jwk, protectedHeader.alg);
       });
diff --git a/backend/src/ee/services/pki-acme/pki-acme-types.ts b/backend/src/ee/services/pki-acme/pki-acme-types.ts
index 4bf7411c4..35571b0cb 100644
--- a/backend/src/ee/services/pki-acme/pki-acme-types.ts
+++ b/backend/src/ee/services/pki-acme/pki-acme-types.ts
@@ -1,5 +1,6 @@
 import { z } from "zod";
 
+import { JWSHeaderParameters } from "jose";
 import {
   CreateAcmeAccountBodySchema,
   CreateAcmeAccountResponseSchema,
@@ -12,7 +13,6 @@ import {
   GetAcmeAuthorizationResponseSchema,
   GetAcmeDirectoryResponseSchema,
   GetAcmeOrderResponseSchema,
-  JwsPayloadSchema,
   ListAcmeOrdersResponseSchema,
   ProtectedHeaderSchema,
   RawJwsPayloadSchema,
@@ -32,16 +32,16 @@ export type TRespondToAcmeChallengeResponse = z.infer<typeof RespondToAcmeChalle
 
 // Payload types
 export type TRawJwsPayload = z.infer<typeof RawJwsPayloadSchema>;
-export type TJwsPayload = z.infer<typeof JwsPayloadSchema>;
 export type TProtectedHeader = z.infer<typeof ProtectedHeaderSchema>;
 export type TCreateAcmeAccountPayload = z.infer<typeof CreateAcmeAccountBodySchema>;
 export type TCreateAcmeOrderPayload = z.infer<typeof CreateAcmeOrderBodySchema>;
 export type TDeactivateAcmeAccountPayload = z.infer<typeof DeactivateAcmeAccountBodySchema>;
 export type TFinalizeAcmeOrderPayload = z.infer<typeof FinalizeAcmeOrderBodySchema>;
 
-export type TJwsPayloadWithJwk = TJwsPayload & {
-  jwk: JsonWebKey;
-  alg: string;
+export type TJwsPayload<T> = {
+  protectedHeader: TProtectedHeader;
+  jwk?: JsonWebKey;
+  payload: T;
 };
 export type TAcmeResponse<TPayload> = {
   status: number;
@@ -50,7 +50,11 @@ export type TAcmeResponse<TPayload> = {
 };
 
 export type TPkiAcmeServiceFactory = {
-  validateCreateAcmeAccountJwsPayload(body: TRawJwsPayload): Promise<TJwsPayloadWithJwk>;
+  validateJwsPayload: <T>(
+    rawJwsPayload: TRawJwsPayload,
+    getJWK: (protectedHeader: JWSHeaderParameters) => Promise<JsonWebKey>,
+    schema: z.ZodSchema<T>
+  ) => Promise<TJwsPayload<T>>;
   getAcmeDirectory: (profileId: string) => Promise<TGetAcmeDirectoryResponse>;
   getAcmeNewNonce: (profileId: string) => Promise<string>;
   createAcmeAccount: (