diff --git a/.eslintignore b/.eslintignore
index f5f8a9e7ccd..2487b54410d 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,5 +1,6 @@
 packages/api/app/bundle.api.js
 packages/api/dist
+packages/api/@types
 packages/api/migrations
 
 packages/crdt/dist
diff --git a/.eslintrc.js b/.eslintrc.js
index c411995fc87..2131f232a39 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -163,6 +163,11 @@ module.exports = {
       { patterns: [...restrictedImportPatterns, ...restrictedImportColors] },
     ],
 
+    '@typescript-eslint/ban-ts-comment': [
+      'error',
+      { 'ts-ignore': 'allow-with-description' },
+    ],
+
     // Rules disable during TS migration
     '@typescript-eslint/no-var-requires': 'off',
     'prefer-const': 'warn',
diff --git a/.gitignore b/.gitignore
index 691472708e3..9777ed2d001 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 !data/.gitkeep
 /data2
 packages/api/dist
+packages/api/@types
 packages/crdt/dist
 packages/desktop-electron/client-build
 packages/desktop-electron/.electron-symbols
diff --git a/packages/api/index.js b/packages/api/index.js
deleted file mode 100644
index 4473e540c86..00000000000
--- a/packages/api/index.js
+++ /dev/null
@@ -1,38 +0,0 @@
-// eslint-disable-next-line import/extensions
-import * as bundle from './app/bundle.api.js';
-import * as injected from './injected';
-import { validateNodeVersion } from './validateNodeVersion';
-
-let actualApp;
-export const internal = bundle.lib;
-
-// DEPRECATED: remove the next line in @actual-app/api v7
-export * as methods from './methods';
-
-export * from './methods';
-export * as utils from './utils';
-
-export async function init(config = {}) {
-  if (actualApp) {
-    return;
-  }
-
-  validateNodeVersion();
-
-  global.fetch = (...args) =>
-    import('node-fetch').then(({ default: fetch }) => fetch(...args));
-
-  await bundle.init(config);
-  actualApp = bundle.lib;
-
-  injected.override(bundle.lib.send);
-  return bundle.lib;
-}
-
-export async function shutdown() {
-  if (actualApp) {
-    await actualApp.send('sync');
-    await actualApp.send('close-budget');
-    actualApp = null;
-  }
-}
diff --git a/packages/api/index.ts b/packages/api/index.ts
new file mode 100644
index 00000000000..0e2c6fcd70b
--- /dev/null
+++ b/packages/api/index.ts
@@ -0,0 +1,55 @@
+// @ts-ignore: false-positive commonjs module error on build until typescript 5.3
+import type {
+  RequestInfo as FetchRequestInfo,
+  RequestInit as FetchRequestInit,
+} from 'node-fetch'; // with { 'resolution-mode': 'import' };
+
+// loot-core types
+import type { initConfig } from 'loot-core/server/main';
+
+// eslint-disable-next-line import/extensions
+import * as bundle from './app/bundle.api.js';
+import * as injected from './injected';
+import { validateNodeVersion } from './validateNodeVersion';
+
+let actualApp: null | typeof bundle.lib;
+export const internal = bundle.lib;
+
+// DEPRECATED: remove the next line in @actual-app/api v7
+export * as methods from './methods';
+
+export * from './methods';
+export * as utils from './utils';
+
+export async function init(config: initConfig = {}) {
+  if (actualApp) {
+    return;
+  }
+
+  validateNodeVersion();
+
+  if (!globalThis.fetch) {
+    globalThis.fetch = (url: URL | RequestInfo, init?: RequestInit) => {
+      return import('node-fetch').then(({ default: fetch }) =>
+        fetch(
+          url as unknown as FetchRequestInfo,
+          init as unknown as FetchRequestInit,
+        ),
+      ) as unknown as Promise<Response>;
+    };
+  }
+
+  await bundle.init(config);
+  actualApp = bundle.lib;
+
+  injected.override(bundle.lib.send);
+  return bundle.lib;
+}
+
+export async function shutdown() {
+  if (actualApp) {
+    await actualApp.send('sync');
+    await actualApp.send('close-budget');
+    actualApp = null;
+  }
+}
diff --git a/packages/api/methods.js b/packages/api/methods.ts
similarity index 87%
rename from packages/api/methods.js
rename to packages/api/methods.ts
index 9af541f2670..272a9b4693a 100644
--- a/packages/api/methods.js
+++ b/packages/api/methods.ts
@@ -1,8 +1,14 @@
+// @ts-strict-ignore
+import type { Handlers } from 'loot-core/src/types/handlers';
+
 import * as injected from './injected';
 
 export { q } from './app/query';
 
-function send(name, args) {
+function send<K extends keyof Handlers, T extends Handlers[K]>(
+  name: K,
+  args?: Parameters<T>[0],
+): Promise<Awaited<ReturnType<T>>> {
   return injected.send(name, args);
 }
 
@@ -21,7 +27,7 @@ export async function loadBudget(budgetId) {
   return send('api/load-budget', { id: budgetId });
 }
 
-export async function downloadBudget(syncId, { password } = {}) {
+export async function downloadBudget(syncId, password?) {
   return send('api/download-budget', { syncId, password });
 }
 
@@ -95,7 +101,7 @@ export function getAccounts() {
   return send('api/accounts-get');
 }
 
-export function createAccount(account, initialBalance) {
+export function createAccount(account, initialBalance?) {
   return send('api/account-create', { account, initialBalance });
 }
 
@@ -103,7 +109,7 @@ export function updateAccount(id, fields) {
   return send('api/account-update', { id, fields });
 }
 
-export function closeAccount(id, transferAccountId, transferCategoryId) {
+export function closeAccount(id, transferAccountId?, transferCategoryId?) {
   return send('api/account-close', {
     id,
     transferAccountId,
@@ -127,7 +133,7 @@ export function updateCategoryGroup(id, fields) {
   return send('api/category-group-update', { id, fields });
 }
 
-export function deleteCategoryGroup(id, transferCategoryId) {
+export function deleteCategoryGroup(id, transferCategoryId?) {
   return send('api/category-group-delete', { id, transferCategoryId });
 }
 
@@ -143,7 +149,7 @@ export function updateCategory(id, fields) {
   return send('api/category-update', { id, fields });
 }
 
-export function deleteCategory(id, transferCategoryId) {
+export function deleteCategory(id, transferCategoryId?) {
   return send('api/category-delete', { id, transferCategoryId });
 }
 
diff --git a/packages/api/package.json b/packages/api/package.json
index 7c2d9a01e5b..b0433a638e8 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -7,17 +7,18 @@
     "node": ">=18.12.0"
   },
   "main": "dist/index.js",
-  "types": "dist/index.d.ts",
+  "types": "@types/index.d.ts",
   "files": [
     "dist"
   ],
   "scripts": {
     "build:app": "yarn workspace loot-core build:api",
-    "build:node": "tsc --p tsconfig.dist.json",
+    "build:node": "tsc --p tsconfig.dist.json && tsc-alias -p tsconfig.dist.json",
     "build:migrations": "cp migrations/*.sql dist/migrations",
     "build:default-db": "cp default-db.sqlite dist/",
-    "build": "rm -rf dist && yarn run build:app && yarn run build:node && yarn run build:migrations && yarn run build:default-db",
-    "test": "yarn run build:app && jest -c jest.config.js"
+    "build": "yarn run clean && yarn run build:app && yarn run build:node && yarn run build:migrations && yarn run build:default-db",
+    "test": "yarn run build:app && jest -c jest.config.js",
+    "clean": "rm -rf dist @types"
   },
   "dependencies": {
     "better-sqlite3": "^9.2.2",
@@ -31,6 +32,7 @@
     "@types/jest": "^27.5.0",
     "@types/uuid": "^9.0.2",
     "jest": "^27.0.0",
+    "tsc-alias": "^1.8.8",
     "typescript": "^5.0.2"
   }
 }
diff --git a/packages/api/tsconfig.dist.json b/packages/api/tsconfig.dist.json
index 6704cb1fb7c..12caac8f770 100644
--- a/packages/api/tsconfig.dist.json
+++ b/packages/api/tsconfig.dist.json
@@ -8,8 +8,12 @@
     "moduleResolution": "Node16",
     "noEmit": false,
     "declaration": true,
-    "outDir": "dist"
+    "outDir": "dist",
+    "declarationDir": "@types",
+    "paths": {
+      "loot-core/*": ["./@types/loot-core/*"],
+    }
   },
   "include": ["."],
-  "exclude": ["dist"]
+  "exclude": ["**/node_modules/*", "dist", "@types"]
 }
diff --git a/packages/loot-core/bin/build-api b/packages/loot-core/bin/build-api
new file mode 100755
index 00000000000..577e6342332
--- /dev/null
+++ b/packages/loot-core/bin/build-api
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -euo pipefail
+
+cd "$(dirname "$0")/.." || exit 1
+ROOT="$(pwd -P)"
+
+yarn tsc -p tsconfig.api.json --outDir ../api/@types/loot-core/
+# Copy existing handwritten .d.ts files, as tsc doesn't move them for us
+dest="../../api/@types/loot-core"
+cd src
+find . -type f -name "*.d.ts" | while read -r f
+do
+    d=$(dirname "${f}")
+    d="${dest}/${d}"
+    mkdir -p "${d}"
+    cp "${f}" "${d}"
+done
+cd "$ROOT"
+yarn webpack --config ./webpack/webpack.api.config.js;
+./bin/copy-migrations ../api
\ No newline at end of file
diff --git a/packages/loot-core/package.json b/packages/loot-core/package.json
index 48253fea564..aceb8e1f0a1 100644
--- a/packages/loot-core/package.json
+++ b/packages/loot-core/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "build:node": "cross-env NODE_ENV=production webpack --config ./webpack/webpack.desktop.config.js",
     "watch:node": "cross-env NODE_ENV=development webpack --config ./webpack/webpack.desktop.config.js --watch",
-    "build:api": "cross-env NODE_ENV=development webpack --config ./webpack/webpack.api.config.js; ./bin/copy-migrations ../api",
+    "build:api": "cross-env NODE_ENV=development ./bin/build-api",
     "build:browser": "cross-env NODE_ENV=production ./bin/build-browser",
     "watch:browser": "cross-env NODE_ENV=development ./bin/build-browser",
     "test": "npm-run-all -cp 'test:*'",
diff --git a/packages/loot-core/src/server/importers/ynab5.ts b/packages/loot-core/src/server/importers/ynab5.ts
index f9fb1337e0e..a9e32ebfe35 100644
--- a/packages/loot-core/src/server/importers/ynab5.ts
+++ b/packages/loot-core/src/server/importers/ynab5.ts
@@ -146,8 +146,8 @@ async function importTransactions(
   );
 
   const payeesByTransferAcct = payees
-    .filter((payee: YNAB5.Payee) => payee?.transfer_acct)
-    .map((payee: YNAB5.Payee) => [payee.transfer_acct, payee]);
+    .filter(payee => payee?.transfer_acct)
+    .map(payee => [payee.transfer_acct, payee] as [string, YNAB5.Payee]);
   const payeeTransferAcctHashMap = new Map<string, YNAB5.Payee>(
     payeesByTransferAcct,
   );
diff --git a/packages/loot-core/src/server/main.ts b/packages/loot-core/src/server/main.ts
index 3a80926cdc8..c1c219f7a7f 100644
--- a/packages/loot-core/src/server/main.ts
+++ b/packages/loot-core/src/server/main.ts
@@ -2251,8 +2251,14 @@ export async function initApp(isDev, socketName) {
   }
 }
 
+export type initConfig = {
+  dataDir?: string;
+  serverURL?: string;
+  password?: string;
+};
+
 // eslint-disable-next-line import/no-unused-modules
-export async function init(config) {
+export async function init(config: initConfig) {
   // Get from build
 
   let dataDir, serverURL;
diff --git a/packages/loot-core/src/server/mutators.ts b/packages/loot-core/src/server/mutators.ts
index abd44cf829e..f5eac7b1d80 100644
--- a/packages/loot-core/src/server/mutators.ts
+++ b/packages/loot-core/src/server/mutators.ts
@@ -51,7 +51,9 @@ export async function runHandler<T extends Handlers[keyof Handlers]>(
   }
 
   if (mutatingMethods.has(handler)) {
-    return runMutator(() => handler(args), { undoTag });
+    return runMutator(() => handler(args), { undoTag }) as Promise<
+      ReturnType<T>
+    >;
   }
 
   // When closing a file, it clears out all global state for the file. That
@@ -67,7 +69,7 @@ export async function runHandler<T extends Handlers[keyof Handlers]>(
   promise.then(() => {
     runningMethods.delete(promise);
   });
-  return promise;
+  return promise as Promise<ReturnType<T>>;
 }
 
 // These are useful for tests. Only use them in tests.
diff --git a/packages/loot-core/src/shared/schedules.ts b/packages/loot-core/src/shared/schedules.ts
index 23dbd9c4e8d..26c5c7692a7 100644
--- a/packages/loot-core/src/shared/schedules.ts
+++ b/packages/loot-core/src/shared/schedules.ts
@@ -1,5 +1,9 @@
 // @ts-strict-ignore
 import type { IRuleOptions } from '@rschedule/core';
+// eslint-disable-next-line import/no-duplicates
+import type { IByHourOfDayRuleRuleOptions } from '@rschedule/core/rules/ByHourOfDay';
+// eslint-disable-next-line import/no-duplicates
+import type { IFrequencyRuleOptions } from '@rschedule/core/rules/Frequency';
 
 import * as monthUtils from './months';
 import { q } from './query';
@@ -183,7 +187,9 @@ export function getRecurringDescription(config, dateFormat) {
 }
 
 export function recurConfigToRSchedule(config) {
-  const base: IRuleOptions = {
+  const base: IRuleOptions &
+    IFrequencyRuleOptions &
+    IByHourOfDayRuleRuleOptions = {
     start: monthUtils.parseDate(config.start),
     frequency: config.frequency.toUpperCase(),
     byHourOfDay: [12],
diff --git a/packages/loot-core/src/types/api-handlers.d.ts b/packages/loot-core/src/types/api-handlers.d.ts
index c4e8c2b11b8..30e85921835 100644
--- a/packages/loot-core/src/types/api-handlers.d.ts
+++ b/packages/loot-core/src/types/api-handlers.d.ts
@@ -54,10 +54,11 @@ export interface ApiHandlers {
     payees;
   }) => Promise<unknown>;
 
-  'api/transactions-import': (arg: {
-    accountId;
-    transactions;
-  }) => Promise<unknown>;
+  'api/transactions-import': (arg: { accountId; transactions }) => Promise<{
+    errors?: { message: string }[];
+    added;
+    updated;
+  }>;
 
   'api/transactions-add': (arg: {
     accountId;
diff --git a/packages/loot-core/tsconfig.api.json b/packages/loot-core/tsconfig.api.json
new file mode 100644
index 00000000000..5ffe224f8c9
--- /dev/null
+++ b/packages/loot-core/tsconfig.api.json
@@ -0,0 +1,12 @@
+{
+    "extends": "../../tsconfig.json",
+    "compilerOptions": {
+      "rootDir": "./src",
+      "declaration": true,
+      "emitDeclarationOnly": true,
+      "allowJs": false,
+      "noEmit": false,
+    },
+    "include": ["./typings", "./src/server/*"],
+    "exclude": ["**/node_modules/*", "**/build/*", "**/lib-dist/*", "./src/server/bench.ts"],
+  }
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index b7a18248790..a421798af08 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -29,6 +29,10 @@
     "module": "ES2022",
     // Until/if we build using tsc
     "noEmit": true,
+    "paths": {
+      // until we turn on composite/references
+      "loot-core/*": ["./packages/loot-core/src/*"],
+    },
     "plugins": [
       {
         "name": "typescript-strict-plugin",
diff --git a/upcoming-release-notes/2053.md b/upcoming-release-notes/2053.md
new file mode 100644
index 00000000000..1c882269dd3
--- /dev/null
+++ b/upcoming-release-notes/2053.md
@@ -0,0 +1,6 @@
+---
+category: Maintenance
+authors: [twk3]
+---
+
+Bundle loot-core types into the API
diff --git a/yarn.lock b/yarn.lock
index 669359f25af..88390827d57 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -31,6 +31,7 @@ __metadata:
     compare-versions: "npm:^6.1.0"
     jest: "npm:^27.0.0"
     node-fetch: "npm:^3.3.2"
+    tsc-alias: "npm:^1.8.8"
     typescript: "npm:^5.0.2"
     uuid: "npm:^9.0.0"
   languageName: unknown
@@ -6328,7 +6329,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"commander@npm:^9.4.1":
+"commander@npm:^9.0.0, commander@npm:^9.4.1":
   version: 9.5.0
   resolution: "commander@npm:9.5.0"
   checksum: 41c49b3d0f94a1fbeb0463c85b13f15aa15a9e0b4d5e10a49c0a1d58d4489b549d62262b052ae0aa6cfda53299bee487bfe337825df15e342114dde543f82906
@@ -9192,7 +9193,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"globby@npm:^11.1.0":
+"globby@npm:^11.0.4, globby@npm:^11.1.0":
   version: 11.1.0
   resolution: "globby@npm:11.1.0"
   dependencies:
@@ -12615,6 +12616,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"mylas@npm:^2.1.9":
+  version: 2.1.13
+  resolution: "mylas@npm:2.1.13"
+  checksum: 37f335424463c422f48d50317aa0a34fe410fabb146cbf27b453a0aa743732b5626f56deaa190bca2ce29836f809d88759007976dc78d5d22b75918a00586577
+  languageName: node
+  linkType: hard
+
 "nanoid@npm:^3.3.7":
   version: 3.3.7
   resolution: "nanoid@npm:3.3.7"
@@ -13569,6 +13577,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"plimit-lit@npm:^1.2.6":
+  version: 1.6.1
+  resolution: "plimit-lit@npm:1.6.1"
+  dependencies:
+    queue-lit: "npm:^1.5.1"
+  checksum: e4eaf018dc311fd4d452954c10992cd8a9eb72d168ec2274bb831d86558422703e1405a8978ffdd5c418654e6a25e10a0765a39bf3ce3a84dc799fe6268e0ea4
+  languageName: node
+  linkType: hard
+
 "plist@npm:^3.0.4, plist@npm:^3.0.5":
   version: 3.1.0
   resolution: "plist@npm:3.1.0"
@@ -13817,6 +13834,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"queue-lit@npm:^1.5.1":
+  version: 1.5.2
+  resolution: "queue-lit@npm:1.5.2"
+  checksum: 8dd45c79bd25b33b0c7d587391eb0b4acc4deb797bf92fef62b2d8e7c03b64083f5304f09d52a18267d34d020cc67ccde97a88185b67590eeccb194938ff1f98
+  languageName: node
+  linkType: hard
+
 "queue-microtask@npm:^1.2.2":
   version: 1.2.3
   resolution: "queue-microtask@npm:1.2.3"
@@ -16074,6 +16098,22 @@ __metadata:
   languageName: node
   linkType: hard
 
+"tsc-alias@npm:^1.8.8":
+  version: 1.8.8
+  resolution: "tsc-alias@npm:1.8.8"
+  dependencies:
+    chokidar: "npm:^3.5.3"
+    commander: "npm:^9.0.0"
+    globby: "npm:^11.0.4"
+    mylas: "npm:^2.1.9"
+    normalize-path: "npm:^3.0.0"
+    plimit-lit: "npm:^1.2.6"
+  bin:
+    tsc-alias: dist/bin/index.js
+  checksum: 145d7bb23a618e1136c8addd4b4ed23a1d503a37d3fc5b3698a993fea9331180a68853b0e78ff50fb3fb7ed95d4996a2d82f77395814bbd1c40adee8a9151d90
+  languageName: node
+  linkType: hard
+
 "tsconfck@npm:^2.1.0":
   version: 2.1.2
   resolution: "tsconfck@npm:2.1.2"