diff --git a/src/api/v2/queries/history.ts b/src/api/v2/queries/history.ts
index 0710d87..973a56c 100644
--- a/src/api/v2/queries/history.ts
+++ b/src/api/v2/queries/history.ts
@@ -1,15 +1,16 @@
 import type { Request, Response } from "express";
 import { CACHE_TTL_ANCHORED, CACHE_TTL_PENDING, DPID_ENV, getCeramicClient } from "../../../util/config.js";
 import { type CeramicClient } from "@desci-labs/desci-codex-lib";
-import parentLogger from "../../../logger.js";
-import { resolveDpid } from "../resolvers/dpid.js";
+import parentLogger, { serializeError } from "../../../logger.js";
+import { DpidResolverError, resolveDpid } from "../resolvers/dpid.js";
 import { isDpid } from "../../../util/validation.js";
 import { CommitID, StreamID } from "@desci-labs/desci-codex-lib/dist/streams.js";
 import { getFromCache, keyBump, setToCache } from "../../../redis.js";
 import { cleanupEip155Address } from "../../../util/conversions.js";
 
+const MODULE_PATH = "api/v2/queries/history" as const;
 const logger = parentLogger.child({
-    module: "api/v2/queries/history",
+    module: MODULE_PATH,
 });
 
 export type HistoryQueryRequest = {
@@ -22,7 +23,15 @@ export type HistoryQueryParams = {
     id?: string;
 };
 
-export type HistoryQueryResponse = HistoryQueryResult[] | HistoryQueryError;
+export type ErrorResponse = {
+    error: string;
+    details: unknown;
+    body: unknown;
+    params: unknown;
+    path: typeof MODULE_PATH;
+};
+
+export type HistoryQueryResponse = HistoryQueryResult[] | ErrorResponse;
 
 export type HistoryVersion = {
     /** Manifest CID at this version */
@@ -44,8 +53,6 @@ export type HistoryQueryResult = {
     versions: HistoryVersion[];
 };
 
-export type HistoryQueryError = string;
-
 /**
  * For one or more IDs, fetch metadata and version history.
  * An ID can be both a streamID and a dPID, but a dPID lookup is a bit slower.
@@ -57,10 +64,20 @@ export const historyQueryHandler = async (
     const { id } = req.params;
     const { ids = [] } = req.body;
 
+    const baseError = {
+        params: req.params,
+        body: req.body,
+        path: MODULE_PATH,
+    };
+
     if (!Array.isArray(ids)) {
         // Received ids in body, but not as array
-        logger.error({ body: req.body, params: req.params }, "received malformed IDs");
-        return res.status(400).send("body.ids expects string[]");
+        logger.error(baseError, "received malformed IDs");
+        return res.status(400).send({
+            error: "invalid request",
+            details: "body.ids expects string[]",
+            ...baseError,
+        });
     }
 
     if (id) {
@@ -70,8 +87,12 @@ export const historyQueryHandler = async (
 
     if (ids.length === 0) {
         // Neither ID format was supplied
-        logger.error({ body: req.body, params: req.params }, "request missing IDs");
-        return res.status(400).send("missing /:id or ids array in body");
+        logger.error(baseError, "request missing IDs");
+        return res.status(400).send({
+            error: "invalid request",
+            details: "missing /:id or ids array in body",
+            ...baseError,
+        });
     }
 
     logger.info({ ids }, "handling history query");
@@ -87,9 +108,23 @@ export const historyQueryHandler = async (
         ]);
         const result = [...codexHistories, ...dpidHistories];
         return res.send(result);
-    } catch (error) {
-        logger.error({ ids, error }, "failed to compile histories");
-        return res.status(500).send("failed to compile histories");
+    } catch (e) {
+        if (e instanceof DpidResolverError) {
+            const errPayload = {
+                error: "failed to resolve dpid",
+                details: serializeError(e),
+                ...baseError,
+            };
+            logger.error(errPayload, "failed to resolve dpid");
+            return res.status(500).send(errPayload);
+        }
+        const errPayload = {
+            error: "failed to compile histories",
+            details: serializeError(e as Error),
+            ...baseError,
+        };
+        logger.error(errPayload, "failed to compile histories");
+        return res.status(500).send(errPayload);
     }
 };
 
diff --git a/src/api/v2/resolvers/codex.ts b/src/api/v2/resolvers/codex.ts
index e35f5c9..41166c1 100644
--- a/src/api/v2/resolvers/codex.ts
+++ b/src/api/v2/resolvers/codex.ts
@@ -1,5 +1,5 @@
 import type { Request, Response } from "express";
-import parentLogger from "../../../logger.js";
+import parentLogger, { serializeError } from "../../../logger.js";
 import { pidFromStringID, type PID } from "@desci-labs/desci-codex-lib";
 import { getCodexHistory, type HistoryQueryResult } from "../queries/history.js";
 
@@ -46,7 +46,7 @@ export const resolveCodexHandler = async (
     } catch (e) {
         const errPayload = {
             error: "Invalid stream or commit ID",
-            details: "Could not coerce ID into neither stream nor commitID",
+            details: serializeError(e as Error),
             params: req.params,
             path: MODULE_PATH,
         };
@@ -67,7 +67,7 @@ export const resolveCodexHandler = async (
         logger.error({ streamId, versionIx, err }, "failed to resolve stream");
         return res.status(404).send({
             error: "Could not resolve; does stream/version exist?",
-            details: err,
+            details: serializeError(err),
             params: req.params,
             path: MODULE_PATH,
         });
diff --git a/src/api/v2/resolvers/dpid.ts b/src/api/v2/resolvers/dpid.ts
index 81efa0c..6d2941d 100644
--- a/src/api/v2/resolvers/dpid.ts
+++ b/src/api/v2/resolvers/dpid.ts
@@ -1,5 +1,5 @@
 import type { Request, Response } from "express";
-import parentLogger from "../../../logger.js";
+import parentLogger, { serializeError } from "../../../logger.js";
 import { CACHE_TTL_ANCHORED, CACHE_TTL_PENDING, DPID_ENV, getDpidAliasRegistry } from "../../../util/config.js";
 import { ResolverError } from "../../../errors.js";
 import { getCodexHistory, type HistoryQueryResult, type HistoryVersion } from "../queries/history.js";
@@ -7,7 +7,7 @@ import { getFromCache, setToCache } from "../../../redis.js";
 import type { DpidAliasRegistry } from "@desci-labs/desci-contracts/dist/typechain-types/DpidAliasRegistry.js";
 import { BigNumber } from "ethers";
 
-const MODULE_PATH = "/api/v2/resolvers/codex" as const;
+const MODULE_PATH = "/api/v2/resolvers/dpid" as const;
 const logger = parentLogger.child({
     module: MODULE_PATH,
 });
@@ -53,7 +53,7 @@ export const resolveDpidHandler = async (
         if (e instanceof DpidResolverError) {
             const errPayload = {
                 error: e.message,
-                details: e.cause,
+                details: serializeError(e.cause),
                 params: req.params,
                 path: MODULE_PATH,
             };
@@ -63,7 +63,7 @@ export const resolveDpidHandler = async (
             const err = e as Error;
             const errPayload = {
                 error: err.message,
-                details: err,
+                details: serializeError(err),
                 params: req.params,
                 path: MODULE_PATH,
             };
@@ -148,8 +148,11 @@ export const resolveDpid = async (dpid: number, versionIx?: number): Promise<His
                 setToCache(streamCacheKey, "", CACHE_TTL_PENDING);
             }
         } else {
-            // The BigNumbers are parsed into objects, which ethers.BigNumber in fine with
             resolvedEntry = JSON.parse(fromCache);
+            // The BigNumbers are deserialized into objects, which ethers.BigNumber can instantiate from
+            resolvedEntry[1].forEach((v) => {
+                v[1] = BigNumber.from(v[1]);
+            });
         }
 
         const owner = resolvedEntry[0];
@@ -166,11 +169,11 @@ export const resolveDpid = async (dpid: number, versionIx?: number): Promise<His
                 version: "",
                 // When restored from redis, the BigNumber is deserialised as a regular object
                 // Ethers can instantiate the class from that format
-                time: BigNumber.from(time).toNumber(),
+                time: time.toNumber(),
                 manifest,
             })),
         };
-        logger.info(result, "manifest resolved via fallback to legacy entry");
+        logger.info({ dpid, owner, manifest: result.manifest }, "manifest resolved via fallback to legacy entry");
         return result;
     } catch (e) {
         throw new DpidResolverError({
@@ -199,10 +202,7 @@ const undupeIfLegacyDevHistory = (versions: LegacyVersion[]) => {
     }, [] as LegacyVersion[]);
 };
 
-const isLegacyDupe = (
-    [aCid, aTimeBn]: LegacyVersion, 
-    [bCid, bTimeBn]: LegacyVersion
-): Boolean => {
+const isLegacyDupe = ([aCid, aTimeBn]: LegacyVersion, [bCid, bTimeBn]: LegacyVersion): boolean => {
     const cidIsEqual = aCid === bCid;
     const timeIsEqual = aTimeBn.toNumber() === bTimeBn.toNumber();
     return cidIsEqual && timeIsEqual;
diff --git a/src/api/v2/resolvers/generic.ts b/src/api/v2/resolvers/generic.ts
index 94eaa11..6057f35 100644
--- a/src/api/v2/resolvers/generic.ts
+++ b/src/api/v2/resolvers/generic.ts
@@ -2,7 +2,7 @@ import type { Request, Response } from "express";
 import axios from "axios";
 import type { ResearchObjectV1 } from "@desci-labs/desci-models";
 
-import parentLogger from "../../../logger.js";
+import parentLogger, { serializeError } from "../../../logger.js";
 import analytics, { LogEventType } from "../../../analytics.js";
 import { IPFS_GATEWAY, getNodesUrl } from "../../../util/config.js";
 import { DpidResolverError, resolveDpid } from "./dpid.js";
@@ -152,7 +152,7 @@ export const resolveGenericHandler = async (
         if (e instanceof DpidResolverError) {
             const errPayload = {
                 error: e.message,
-                details: e.cause,
+                details: serializeError(e.cause),
                 ...baseError,
             };
             logger.error(errPayload, "failed to resolve dpid");
@@ -161,7 +161,7 @@ export const resolveGenericHandler = async (
             const err = e as Error;
             const errPayload = {
                 error: err.message,
-                details: err,
+                details: serializeError(err),
                 ...baseError,
             };
             logger.error(errPayload, "unexpected error occurred");
@@ -216,7 +216,7 @@ export const resolveGenericHandler = async (
             // Doesn't seem it was a validDagUrl
             const errPayload = {
                 error: "Failed to resolve DAG URL; check path and versioning",
-                details: e,
+                details: serializeError(e as Error),
                 ...baseError,
             };
             logger.error(errPayload, "got invalid DAG URL");
diff --git a/src/logger.ts b/src/logger.ts
index 06e13d2..eb1dba2 100644
--- a/src/logger.ts
+++ b/src/logger.ts
@@ -39,6 +39,8 @@ function omitBuffer(array: any) {
     });
 }
 
+export const serializeError = (e: Error) => pino.stdSerializers.err(e);
+
 process.on("uncaughtException", (err) => {
     logger.fatal(err, "uncaught exception");
 });