diff --git a/src/api/v2/queries/history.ts b/src/api/v2/queries/history.ts
index 5a157f9..d4f1df2 100644
--- a/src/api/v2/queries/history.ts
+++ b/src/api/v2/queries/history.ts
@@ -3,6 +3,7 @@ import { getCeramicClient } from "../../../util/config.js";
 import { resolveHistory, type CeramicClient } from "@desci-labs/desci-codex-lib";
 import parentLogger from "../../../logger.js";
 import { resolveDpid } from "../resolvers/dpid.js";
+import { isDpid } from "../../../util/validation.js";
 
 const logger = parentLogger.child({
     module: "api/v2/queries/history",
@@ -95,9 +96,6 @@ export const getVersions = async (ceramic: CeramicClient, streamId: string) => {
     }));
 };
 
-/** Consider ID a dPID if it looks like a number */
-const isDpid = (id: string) => /^[0-9]+$/.test(id);
-
 const getCodexHistories = async (streamIds: string[]) => {
     if (streamIds.length === 0) return [];
 
diff --git a/src/api/v2/resolvers/generic.ts b/src/api/v2/resolvers/generic.ts
index 1834bac..56a6d63 100644
--- a/src/api/v2/resolvers/generic.ts
+++ b/src/api/v2/resolvers/generic.ts
@@ -7,6 +7,7 @@ import analytics, { LogEventType } from "../../../analytics.js";
 import { getIpfsGateway, getNodesUrl } from "../../../util/config.js";
 import { DpidResolverError, resolveDpid } from "./dpid.js";
 import type { HistoryQueryResult } from "../queries/history.js";
+import { isDpid, isVersionString } from "../../../util/validation.js";
 
 const MODULE_PATH = "/api/v2/resolvers/generic" as const;
 
@@ -68,7 +69,7 @@ export const resolveGenericHandler = async (
     logger.info({ path, query }, `Resolving path: ${path}`);
 
     const [dpid, ...rest] = path.split("/");
-    if (!matchPlainDpid(dpid)) {
+    if (!isDpid(dpid)) {
         logger.error({ path }, "invalid dpid");
         return res.status(400).send({
             error: "invalid dpid",
@@ -95,7 +96,7 @@ export const resolveGenericHandler = async (
     let suffix = "";
     if (rest.length > 0) {
         const maybeVersionString = rest[0];
-        if (matchVersion(maybeVersionString)) {
+        if (isVersionString(maybeVersionString)) {
             versionIx = getVersionIndex(maybeVersionString);
             suffix = rest.slice(1).join("/");
             logger.info({ dpid, path, versionIx, suffix }, "extracted version from path");
@@ -235,10 +236,6 @@ export const resolveGenericHandler = async (
     }
 };
 
-const matchPlainDpid = (path: string) => /\d+/.test(path);
-
-const matchVersion = (path: string) => /v?\d+/.test(path);
-
 const getVersionIndex = (versionString: string): number => {
     let index;
     if (versionString.startsWith("v")) {
diff --git a/src/util/validation.ts b/src/util/validation.ts
new file mode 100644
index 0000000..e882dc8
--- /dev/null
+++ b/src/util/validation.ts
@@ -0,0 +1,3 @@
+export const isDpid = (id: string) => /^[0-9]+$/.test(id);
+
+export const isVersionString = (maybeVersion: string) => /v?\d/.test(maybeVersion);