diff --git a/src/api/splatnet3-types.ts b/src/api/splatnet3-types.ts
index db29234..37a7da8 100644
--- a/src/api/splatnet3-types.ts
+++ b/src/api/splatnet3-types.ts
@@ -244,6 +244,51 @@ export interface CurrentFestResult {
 /** c1553ac75de0a3ea497cdbafaa93e95b BankaraBattleHistoriesQuery */
 export type BankaraBattleHistoriesResult = unknown;
 
+/** 817618ce39bcf5570f52a97d73301b30 CoopHistoryQuery */
+export interface CoopHistoryResult {
+    coopResult: {
+        historyGroups: {
+            nodes: CoopHistoryGroup[];
+        };
+        historyGroupsOnlyFirst: unknown;
+        monthlyGear: unknown;
+        pointCard: unknown;
+        regularAverageClearWave: unknown;
+        regularGrade: unknown;
+        regularGradePoint: unknown;
+        scale: unknown;
+    }
+}
+interface CoopHistoryGroup {
+    historyDetails: {
+        nodes: CoopHistoryDetail[];
+    };
+}
+interface CoopHistoryDetail {
+    afterGrade: unknown;
+    afterGradePoint: unknown;
+    bossResult: unknown;
+    coopStage: unknown;
+    gradePointDiff: unknown;
+    id: string;
+    memberResults: unknown;
+    myResult: unknown;
+    nextHistoryDetail: {
+        id: string;
+    } | null;
+    previousHistoryDetail: {
+        id: string;
+    } | null;
+    resultWave: unknown;
+    waveResults: unknown;
+    weapons: unknown;
+}
+
+/** f3799a033f0a7ad4b1b396f9a3bafb1e CoopHistoryDetailQuery */
+export interface CoopHistoryDetailResult {
+    coopHistoryDetail: unknown;
+}
+
 /** 7d8b560e31617e981cf7c8aa1ca13a00 LatestBattleHistoriesQuery */
 export interface LatestBattleHistoriesResult {
     latestBattleHistories: {
diff --git a/src/api/splatnet3.ts b/src/api/splatnet3.ts
index 26c2f1b..cbda764 100644
--- a/src/api/splatnet3.ts
+++ b/src/api/splatnet3.ts
@@ -5,7 +5,7 @@ import { NintendoAccountUser } from './na.js';
 import { defineResponse, ErrorResponse } from './util.js';
 import CoralApi from './coral.js';
 import { timeoutSignal } from '../util/misc.js';
-import { BankaraBattleHistoriesResult, BattleHistoryCurrentPlayerResult, BulletToken, CurrentFestResult, FriendListResult, GraphQLRequest, GraphQLResponse, HistoryRecordResult, HomeResult, LatestBattleHistoriesResult, PrivateBattleHistoriesResult, RegularBattleHistoriesResult, RequestId, SettingResult, StageScheduleResult, VsHistoryDetailResult  } from './splatnet3-types.js';
+import { BankaraBattleHistoriesResult, BattleHistoryCurrentPlayerResult, BulletToken, CurrentFestResult, FriendListResult, GraphQLRequest, GraphQLResponse, HistoryRecordResult, HomeResult, LatestBattleHistoriesResult, PrivateBattleHistoriesResult, RegularBattleHistoriesResult, RequestId, SettingResult, StageScheduleResult, VsHistoryDetailResult, CoopHistoryResult, CoopHistoryDetailResult } from './splatnet3-types.js';
 
 const debug = createDebug('nxapi:api:splatnet3');
 
@@ -143,7 +143,13 @@ export default class SplatNet3Api {
     }
 
     async getCoopHistory() {
-        return this.persistedQuery<unknown>(RequestId.CoopHistoryQuery, {});
+        return this.persistedQuery<CoopHistoryResult>(RequestId.CoopHistoryQuery, {});
+    }
+
+    async getCoopHistoryDetail(id: string) {
+        return this.persistedQuery<CoopHistoryDetailResult>(RequestId.CoopHistoryDetailQuery, {
+            coopHistoryDetailId: id
+        });
     }
 
     static async createWithCoral(nso: CoralApi, user: NintendoAccountUser) {
diff --git a/src/cli/splatnet3/dump-results.ts b/src/cli/splatnet3/dump-results.ts
index 2f5a9e6..e3bbb38 100644
--- a/src/cli/splatnet3/dump-results.ts
+++ b/src/cli/splatnet3/dump-results.ts
@@ -28,7 +28,7 @@ export function builder(yargs: Argv<ParentArguments>) {
         type: 'boolean',
         default: true,
     }).option('coop', {
-        describe: 'Include coop (Salmon Run) results',
+        describe: 'Include coop (salmon run) results',
         type: 'boolean',
         default: true,
     });
@@ -51,9 +51,9 @@ export async function handler(argv: ArgumentsCamelCase<Arguments>) {
     if (argv.battles) {
         await dumpResults(splatnet, directory);
     }
-    // if (argv.coop) {
-    //     await dumpCoopResults(splatnet, directory);
-    // }
+    if (argv.coop) {
+        await dumpCoopResults(splatnet, directory);
+    }
 }
 
 export async function dumpResults(
@@ -97,3 +97,37 @@ export async function dumpResults(
         else debug('Skipped %d battle results, files already exist', skipped.length);
     }
 }
+
+export async function dumpCoopResults(splatnet: SplatNet3Api, directory: string) {
+    debug('Fetching coop results');
+    const results = await splatnet.getCoopHistory();
+
+    const skipped = [];
+
+    // Reverse coop history order so oldest records are downloaded first
+    for (const group of results.data.coopResult.historyGroups.nodes.reverse()) {
+        for (const item of group.historyDetails.nodes.reverse()) {
+            const id_str = Buffer.from(item.id, 'base64').toString() || item.id;
+
+            const filename = 'splatnet3-coopHistory-' + id_str + '.json';
+            const file = path.join(directory, filename);
+
+            try {
+                await fs.stat(file);
+                skipped.push(item.id);
+            } catch (err) {
+                debug('Fetching co-op history %s', id_str);
+                const result = await splatnet.getCoopHistoryDetail(item.id);
+
+                debug('Writing %s', filename);
+                await fs.writeFile(file, JSON.stringify({
+                    result: result.data.coopHistoryDetail,
+                }, null, 4) + '\n', 'utf-8');
+            }
+        }
+    }
+
+    if (skipped.length) {
+        debug('Skipped %d co-op history, files already exist', skipped.length);
+    }
+}