diff --git a/config.d.ts b/config.d.ts
index fe48d8883b..c10b631c8f 100644
--- a/config.d.ts
+++ b/config.d.ts
@@ -1 +1,2 @@
-export * from './dist/config';
+export { default as buildConfig } from './dist/src/config/build';
+export * from './dist/src/config/types';
diff --git a/config.js b/config.js
new file mode 100644
index 0000000000..8beaff3791
--- /dev/null
+++ b/config.js
@@ -0,0 +1 @@
+exports.buildConfig = require('./dist/src/config/build');
diff --git a/demo/payload.config.js b/demo/payload.config.js
index 5b4439ab23..2b7b07425a 100644
--- a/demo/payload.config.js
+++ b/demo/payload.config.js
@@ -1,3 +1,5 @@
+const { buildConfig } = require('../config');
+
 const Admin = require('./collections/Admin');
 const AllFields = require('./collections/AllFields');
 const AutoLabel = require('./collections/AutoLabel');
@@ -27,7 +29,7 @@ const BlocksGlobal = require('./globals/BlocksGlobal');
 const NavigationArray = require('./globals/NavigationArray');
 const GlobalWithStrictAccess = require('./globals/GlobalWithStrictAccess');
 
-module.exports = {
+module.exports = buildConfig({
   admin: {
     user: 'admins',
     // indexHTML: 'custom-index.html',
@@ -134,4 +136,4 @@ module.exports = {
     },
   },
   webpack: (config) => config,
-};
+});
diff --git a/src/collections/config/types.ts b/src/collections/config/types.ts
index 1044a44c91..c95c749be2 100644
--- a/src/collections/config/types.ts
+++ b/src/collections/config/types.ts
@@ -1,3 +1,5 @@
+import { Access, Hook } from '../../config/types';
+import { Field } from '../../fields/config/types';
 
 export type Collection = {
   slug: string;
diff --git a/src/config/build.ts b/src/config/build.ts
index b7af8bccde..628cefb315 100644
--- a/src/config/build.ts
+++ b/src/config/build.ts
@@ -1,12 +1,10 @@
-import { PayloadConfig } from '../types';
+import { Config } from './types';
 import sanitize from './sanitize';
 import validate from './validate';
 
-const buildConfig = (config: PayloadConfig) => {
+export default function buildConfig(config: Config): Config {
   const validated = validate(config);
   const sanitized = sanitize(validated);
 
   return sanitized;
-};
-
-module.exports = buildConfig;
+}
diff --git a/src/config/types.ts b/src/config/types.ts
index bcf5ad93c5..84fa32f599 100644
--- a/src/config/types.ts
+++ b/src/config/types.ts
@@ -1,8 +1,8 @@
 import { Express } from 'express';
-import { CSSProperties } from 'react';
 import { Transporter } from 'nodemailer';
 import SMTPConnection from 'nodemailer/lib/smtp-connection';
 import { Collection } from '../collections/config/types';
+import { Global } from '../globals/config/types';
 
 type MockEmailTransport = {
   transport?: 'mock';
@@ -67,6 +67,11 @@ export type Config = {
     graphQL?: string;
     graphQLPlayground?: string;
   };
+  express: {
+    json: {
+      limit?: number
+    }
+  },
   email?: EmailOptions;
   local?: boolean;
   defaultDepth?: number;
diff --git a/src/config/validate.ts b/src/config/validate.ts
index 9e30c4da83..e7099ece50 100644
--- a/src/config/validate.ts
+++ b/src/config/validate.ts
@@ -3,9 +3,9 @@ import * as configSchema from './schema.json';
 import * as collectionSchema from '../collections/config/schema.json';
 
 import InvalidSchema from '../errors/InvalidSchema';
-import { PayloadConfig } from './types';
+import { Config } from './types';
 
-const validateSchema = (config: PayloadConfig): PayloadConfig => {
+const validateSchema = (config: Config): Config => {
   const ajv = new Ajv({ useDefaults: true });
   const validate = ajv.addSchema(collectionSchema, '../collections/config/schema.json').compile(configSchema);
   const valid = validate(config);
diff --git a/src/email/mockHandler.ts b/src/email/mockHandler.ts
index 6b7b9cea74..1f82dd6673 100644
--- a/src/email/mockHandler.ts
+++ b/src/email/mockHandler.ts
@@ -1,17 +1,17 @@
-import nodemailer, { TestAccount, Transporter } from 'nodemailer';
-import { PayloadEmailOptions } from '../types';
+import nodemailer from 'nodemailer';
+import { EmailOptions } from '../config/types';
 import { MockEmailHandler } from './types';
 
-const mockEmailHandler = async (emailConfig: PayloadEmailOptions): Promise<MockEmailHandler> => {
+const mockEmailHandler = async (emailConfig: EmailOptions): Promise<MockEmailHandler> => {
   const testAccount = await nodemailer.createTestAccount();
 
   const smtpOptions = {
     ...emailConfig,
-    host: "smtp.ethereal.email",
+    host: 'smtp.ethereal.email',
     port: 587,
     secure: false,
-    fromName: emailConfig.fromName || "Payload CMS",
-    fromAddress: emailConfig.fromAddress || "info@payloadcms.com",
+    fromName: emailConfig.fromName || 'Payload CMS',
+    fromAddress: emailConfig.fromAddress || 'info@payloadcms.com',
     auth: {
       user: testAccount.user,
       pass: testAccount.pass,
diff --git a/src/email/types.ts b/src/email/types.ts
index 51177951f4..dbc81ccce9 100644
--- a/src/email/types.ts
+++ b/src/email/types.ts
@@ -2,6 +2,13 @@ import { TestAccount, Transporter } from 'nodemailer';
 import Mail from 'nodemailer/lib/mailer';
 import SMTPConnection from 'nodemailer/lib/smtp-connection';
 
+export type Message = {
+  from: string
+  to: string
+  subject: string
+  html: string
+}
+
 export type BuildEmailResult = Promise<{
   transport: Mail,
   transportOptions?: SMTPConnection.Options,
diff --git a/src/globals/config/types.ts b/src/globals/config/types.ts
index e69de29bb2..b1e1593a83 100644
--- a/src/globals/config/types.ts
+++ b/src/globals/config/types.ts
@@ -0,0 +1,15 @@
+import { Access } from '../../config/types';
+import { Field } from '../../fields/config/types';
+
+export type Global = {
+  slug: string;
+  label: string;
+  access?: {
+    create?: Access;
+    read?: Access;
+    update?: Access;
+    delete?: Access;
+    admin?: Access;
+  };
+  fields: Field[];
+};
diff --git a/src/index.ts b/src/index.ts
index 5575552022..41f08b9198 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -40,7 +40,7 @@ import performFieldOperations from './fields/performFieldOperations';
 import localOperations from './collections/operations/local';
 import localGlobalOperations from './globals/operations/local';
 import { encrypt, decrypt } from './auth/crypto';
-import { MockEmailHandler, BuildEmailResult } from './email/types';
+import { MockEmailHandler, BuildEmailResult, Message } from './email/types';
 
 require('isomorphic-fetch');
 
@@ -201,7 +201,7 @@ class Payload {
     if (typeof options.onInit === 'function') options.onInit();
   }
 
-  async sendEmail(message: string) {
+  async sendEmail(message: Message) {
     const email = await this.email;
     const result = email.transport.sendMail(message);
     return result;
diff --git a/src/utilities/checkDuplicateCollections.ts b/src/utilities/checkDuplicateCollections.ts
index b1998c57d6..b806adaf38 100644
--- a/src/utilities/checkDuplicateCollections.ts
+++ b/src/utilities/checkDuplicateCollections.ts
@@ -1,8 +1,9 @@
 import { DuplicateCollection } from '../errors';
+import { Collection } from '../collections/config/types';
 
 const getDuplicates = (arr) => arr.filter((item, index) => arr.indexOf(item) !== index);
 
-const checkDuplicateCollections = (collections) => {
+const checkDuplicateCollections = (collections: Collection[]): void => {
   const duplicateSlugs = getDuplicates(collections.map((c) => c.slug));
   if (duplicateSlugs.length > 0) {
     throw new DuplicateCollection('slug', duplicateSlugs);