diff --git a/gui/examples/config.json b/gui/examples/config.json
index 0f1b17a8..f40a1bf2 100644
--- a/gui/examples/config.json
+++ b/gui/examples/config.json
@@ -2,10 +2,18 @@
   "api": {
     "root": "http://127.0.0.1:5000"
   },
-  "default": {
-    "model": "stable-diffusion-onnx-v1-5",
-    "platform": "amd",
-    "scheduler": "euler-a",
-    "prompt": "an astronaut eating a hamburger"
+  "params": {
+    "model": {
+      "default": "stable-diffusion-onnx-v1-5"
+    },
+    "platform": {
+      "default": "amd"
+    },
+    "scheduler": {
+      "default": "euler-a"
+    },
+    "prompt": {
+      "default": "an astronaut eating a hamburger"
+    }
   }
 }
\ No newline at end of file
diff --git a/gui/package.json b/gui/package.json
index dd12f2de..2d18ce3f 100644
--- a/gui/package.json
+++ b/gui/package.json
@@ -13,7 +13,9 @@
     "@mui/icons-material": "^5.11.0",
     "@mui/lab": "^5.0.0-alpha.114",
     "@mui/material": "^5.11.3",
+    "@types/lodash": "^4.14.191",
     "@types/node": "^18.11.18",
+    "lodash": "^4.17.21",
     "noicejs": "^5.0.0-3",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
diff --git a/gui/src/api/client.ts b/gui/src/api/client.ts
index df054a7e..b5928a72 100644
--- a/gui/src/api/client.ts
+++ b/gui/src/api/client.ts
@@ -1,4 +1,5 @@
 import { doesExist, NotImplementedError } from '@apextoaster/js-utils';
+import { ConfigParams } from '../config';
 
 export interface BaseImgParams {
   /**
@@ -57,6 +58,7 @@ export interface ApiResponse {
 
 export interface ApiClient {
   models(): Promise<Array<string>>;
+  params(): Promise<ConfigParams>;
   platforms(): Promise<Array<string>>;
   schedulers(): Promise<Array<string>>;
 
@@ -136,6 +138,11 @@ export function makeClient(root: string, f = fetch): ApiClient {
       const res = await f(path);
       return await res.json() as Array<string>;
     },
+    async params(): Promise<ConfigParams> {
+      const path = new URL(joinPath('settings', 'params'), root);
+      const res = await f(path);
+      return await res.json() as ConfigParams;
+    },
     async schedulers(): Promise<Array<string>> {
       const path = new URL(joinPath('settings', 'schedulers'), root);
       const res = await f(path);
diff --git a/gui/src/components/ImageControl.tsx b/gui/src/components/ImageControl.tsx
index 64e0d629..76623b5c 100644
--- a/gui/src/components/ImageControl.tsx
+++ b/gui/src/components/ImageControl.tsx
@@ -1,28 +1,30 @@
 import { doesExist } from '@apextoaster/js-utils';
 import { Casino } from '@mui/icons-material';
-import { IconButton, Stack, TextField } from '@mui/material';
+import { Button, Stack, TextField } from '@mui/material';
 import * as React from 'react';
 
 import { BaseImgParams } from '../api/client.js';
-import { CONFIG_DEFAULTS } from '../config.js';
+import { ConfigParams } from '../config.js';
 import { NumericField } from './NumericField.js';
 
 export interface ImageControlProps {
+  config: ConfigParams;
   params: BaseImgParams;
+
   onChange?: (params: BaseImgParams) => void;
 }
 
 export function ImageControl(props: ImageControlProps) {
-  const { params } = props;
+  const { config, params } = props;
 
   return <Stack spacing={2}>
     <Stack direction='row' spacing={4}>
       <NumericField
         decimal
         label='CFG'
-        min={CONFIG_DEFAULTS.cfg.min}
-        max={CONFIG_DEFAULTS.cfg.max}
-        step={CONFIG_DEFAULTS.cfg.step}
+        min={config.cfg.min}
+        max={config.cfg.max}
+        step={config.cfg.step}
         value={params.cfg}
         onChange={(cfg) => {
           if (doesExist(props.onChange)) {
@@ -35,9 +37,9 @@ export function ImageControl(props: ImageControlProps) {
       />
       <NumericField
         label='Steps'
-        min={CONFIG_DEFAULTS.steps.min}
-        max={CONFIG_DEFAULTS.steps.max}
-        step={CONFIG_DEFAULTS.steps.step}
+        min={config.steps.min}
+        max={config.steps.max}
+        step={config.steps.step}
         value={params.steps}
         onChange={(steps) => {
           if (doesExist(props.onChange)) {
@@ -50,9 +52,9 @@ export function ImageControl(props: ImageControlProps) {
       />
       <NumericField
         label='Seed'
-        min={CONFIG_DEFAULTS.seed.min}
-        max={CONFIG_DEFAULTS.seed.max}
-        step={CONFIG_DEFAULTS.seed.step}
+        min={config.seed.min}
+        max={config.seed.max}
+        step={config.seed.step}
         value={params.seed}
         onChange={(seed) => {
           if (doesExist(props.onChange)) {
@@ -63,17 +65,21 @@ export function ImageControl(props: ImageControlProps) {
           }
         }}
       />
-      <IconButton onClick={() => {
-        const seed = Math.floor(Math.random() * CONFIG_DEFAULTS.seed.max);
-        if (doesExist(props.onChange)) {
-          props.onChange({
-            ...params,
-            seed,
-          });
-        }
-      }}>
-        <Casino />
-      </IconButton>
+      <Button
+        variant='outlined'
+        startIcon={<Casino />}
+        onClick={() => {
+          const seed = Math.floor(Math.random() * config.seed.max);
+          if (doesExist(props.onChange)) {
+            props.onChange({
+              ...params,
+              seed,
+            });
+          }
+        }}
+      >
+        New Seed
+      </Button>
     </Stack>
     <TextField label='Prompt' variant='outlined' value={params.prompt} onChange={(event) => {
       if (doesExist(props.onChange)) {
diff --git a/gui/src/components/Img2Img.tsx b/gui/src/components/Img2Img.tsx
index 1bb1f08a..84f6d989 100644
--- a/gui/src/components/Img2Img.tsx
+++ b/gui/src/components/Img2Img.tsx
@@ -4,7 +4,7 @@ import * as React from 'react';
 import { useMutation, useQuery } from 'react-query';
 
 import { ApiClient, BaseImgParams } from '../api/client.js';
-import { Config, CONFIG_DEFAULTS, IMAGE_FILTER, STALE_TIME } from '../config.js';
+import { ConfigParams, IMAGE_FILTER, STALE_TIME } from '../config.js';
 import { SCHEDULER_LABELS } from '../strings.js';
 import { ImageInput } from './ImageInput.js';
 import { ImageCard } from './ImageCard.js';
@@ -17,7 +17,7 @@ const { useState } = React;
 
 export interface Img2ImgProps {
   client: ApiClient;
-  config: Config;
+  config: ConfigParams;
 
   model: string;
   platform: string;
@@ -43,14 +43,14 @@ export function Img2Img(props: Img2ImgProps) {
   });
 
   const [source, setSource] = useState<File>();
-  const [strength, setStrength] = useState(CONFIG_DEFAULTS.strength.default);
+  const [strength, setStrength] = useState(config.strength.default);
   const [params, setParams] = useState<BaseImgParams>({
-    cfg: CONFIG_DEFAULTS.cfg.default,
-    seed: CONFIG_DEFAULTS.seed.default,
-    steps: CONFIG_DEFAULTS.steps.default,
-    prompt: config.default.prompt,
+    cfg: config.cfg.default,
+    seed: config.seed.default,
+    steps: config.steps.default,
+    prompt: config.prompt.default,
   });
-  const [scheduler, setScheduler] = useState(config.default.scheduler);
+  const [scheduler, setScheduler] = useState(config.scheduler.default);
 
   return <Box>
     <Stack spacing={2}>
@@ -67,15 +67,15 @@ export function Img2Img(props: Img2ImgProps) {
         />
       </Stack>
       <ImageInput filter={IMAGE_FILTER} label='Source' onChange={setSource} />
-      <ImageControl params={params} onChange={(newParams) => {
+      <ImageControl config={config} params={params} onChange={(newParams) => {
         setParams(newParams);
       }} />
       <NumericField
         decimal
         label='Strength'
-        min={CONFIG_DEFAULTS.strength.min}
-        max={CONFIG_DEFAULTS.strength.max}
-        step={CONFIG_DEFAULTS.strength.step}
+        min={config.strength.min}
+        max={config.strength.max}
+        step={config.strength.step}
         value={strength}
         onChange={(value) => {
           setStrength(value);
diff --git a/gui/src/components/Inpaint.tsx b/gui/src/components/Inpaint.tsx
index 48172f80..d20c3e84 100644
--- a/gui/src/components/Inpaint.tsx
+++ b/gui/src/components/Inpaint.tsx
@@ -5,7 +5,7 @@ import * as React from 'react';
 import { useMutation, useQuery } from 'react-query';
 
 import { ApiClient, ApiResponse, BaseImgParams, equalResponse } from '../api/client.js';
-import { Config, CONFIG_DEFAULTS, DEFAULT_BRUSH, IMAGE_FILTER, STALE_TIME } from '../config.js';
+import { Config, ConfigParams, DEFAULT_BRUSH, IMAGE_FILTER, STALE_TIME } from '../config.js';
 import { SCHEDULER_LABELS } from '../strings.js';
 import { ImageInput } from './ImageInput.js';
 import { ImageCard } from './ImageCard.js';
@@ -57,7 +57,7 @@ export interface Point {
 
 export interface InpaintProps {
   client: ApiClient;
-  config: Config;
+  config: ConfigParams;
 
   model: string;
   platform: string;
@@ -166,12 +166,12 @@ export function Inpaint(props: InpaintProps) {
   const [mask, setMask] = useState<File>();
   const [source, setSource] = useState<File>();
   const [params, setParams] = useState<BaseImgParams>({
-    cfg: CONFIG_DEFAULTS.cfg.default,
-    seed: CONFIG_DEFAULTS.seed.default,
-    steps: CONFIG_DEFAULTS.steps.default,
-    prompt: config.default.prompt,
+    cfg: config.cfg.default,
+    seed: config.seed.default,
+    steps: config.steps.default,
+    prompt: config.prompt.default,
   });
-  const [scheduler, setScheduler] = useState(config.default.scheduler);
+  const [scheduler, setScheduler] = useState(config.scheduler.default);
 
   useEffect(() => {
     const canvas = mustExist(canvasRef.current);
@@ -190,11 +190,11 @@ export function Inpaint(props: InpaintProps) {
   function renderCanvas() {
     return <canvas
       ref={canvasRef}
-      height={CONFIG_DEFAULTS.height.default}
-      width={CONFIG_DEFAULTS.width.default}
+      height={config.height.default}
+      width={config.width.default}
       style={{
-        maxHeight: CONFIG_DEFAULTS.height.default,
-        maxWidth: CONFIG_DEFAULTS.width.default,
+        maxHeight: config.height.default,
+        maxWidth: config.width.default,
       }}
       onClick={(event) => {
         const canvas = mustExist(canvasRef.current);
@@ -271,22 +271,25 @@ export function Inpaint(props: InpaintProps) {
           }}
         />
         <Button
+          variant='outlined'
           startIcon={<FormatColorFill />}
           onClick={() => floodMask(floodBelow)}>
           Gray to black
         </Button>
         <Button
+          variant='outlined'
           startIcon={<Gradient />}
           onClick={() => grayscaleMask()}>
           Grayscale
         </Button>
         <Button
+          variant='outlined'
           startIcon={<FormatColorFill />}
           onClick={() => floodMask(floodAbove)}>
           Gray to white
         </Button>
       </Stack>
-      <ImageControl params={params} onChange={(newParams) => {
+      <ImageControl config={config} params={params} onChange={(newParams) => {
         setParams(newParams);
       }} />
       <Button onClick={() => upload.mutate()}>Generate</Button>
diff --git a/gui/src/components/OnnxWeb.tsx b/gui/src/components/OnnxWeb.tsx
index caa91e67..24331e1b 100644
--- a/gui/src/components/OnnxWeb.tsx
+++ b/gui/src/components/OnnxWeb.tsx
@@ -4,7 +4,7 @@ import * as React from 'react';
 import { useQuery } from 'react-query';
 
 import { ApiClient } from '../api/client.js';
-import { Config, STALE_TIME } from '../config.js';
+import { Config, ConfigParams, STALE_TIME } from '../config.js';
 import { MODEL_LABELS, PLATFORM_LABELS } from '../strings.js';
 import { Img2Img } from './Img2Img.js';
 import { Inpaint } from './Inpaint.js';
@@ -15,15 +15,15 @@ const { useState } = React;
 
 export interface OnnxWebProps {
   client: ApiClient;
-  config: Config;
+  config: ConfigParams;
 }
 
 export function OnnxWeb(props: OnnxWebProps) {
   const { client, config } = props;
 
   const [tab, setTab] = useState('txt2img');
-  const [model, setModel] = useState(config.default.model);
-  const [platform, setPlatform] = useState(config.default.platform);
+  const [model, setModel] = useState(config.model.default);
+  const [platform, setPlatform] = useState(config.platform.default);
 
   const models = useQuery('models', async () => client.models(), {
     staleTime: STALE_TIME,
diff --git a/gui/src/components/Txt2Img.tsx b/gui/src/components/Txt2Img.tsx
index a299e13c..eb8f055d 100644
--- a/gui/src/components/Txt2Img.tsx
+++ b/gui/src/components/Txt2Img.tsx
@@ -3,7 +3,7 @@ import * as React from 'react';
 import { useMutation, useQuery } from 'react-query';
 
 import { ApiClient, BaseImgParams } from '../api/client.js';
-import { Config, CONFIG_DEFAULTS, STALE_TIME } from '../config.js';
+import { ConfigParams, STALE_TIME } from '../config.js';
 import { SCHEDULER_LABELS } from '../strings.js';
 import { ImageCard } from './ImageCard.js';
 import { ImageControl } from './ImageControl.js';
@@ -15,7 +15,7 @@ const { useState } = React;
 
 export interface Txt2ImgProps {
   client: ApiClient;
-  config: Config;
+  config: ConfigParams;
 
   model: string;
   platform: string;
@@ -40,15 +40,15 @@ export function Txt2Img(props: Txt2ImgProps) {
     staleTime: STALE_TIME,
   });
 
-  const [height, setHeight] = useState(CONFIG_DEFAULTS.height.default);
-  const [width, setWidth] = useState(CONFIG_DEFAULTS.width.default);
+  const [height, setHeight] = useState(config.height.default);
+  const [width, setWidth] = useState(config.width.default);
   const [params, setParams] = useState<BaseImgParams>({
-    cfg: CONFIG_DEFAULTS.cfg.default,
-    seed: CONFIG_DEFAULTS.seed.default,
-    steps: CONFIG_DEFAULTS.steps.default,
-    prompt: config.default.prompt,
+    cfg: config.cfg.default,
+    seed: config.seed.default,
+    steps: config.steps.default,
+    prompt: config.prompt.default,
   });
-  const [scheduler, setScheduler] = useState(config.default.scheduler);
+  const [scheduler, setScheduler] = useState(config.scheduler.default);
 
   return <Box>
     <Stack spacing={2}>
@@ -64,15 +64,15 @@ export function Txt2Img(props: Txt2ImgProps) {
           }}
         />
       </Stack>
-      <ImageControl params={params} onChange={(newParams) => {
+      <ImageControl config={config} params={params} onChange={(newParams) => {
         setParams(newParams);
       }} />
       <Stack direction='row' spacing={4}>
         <NumericField
           label='Width'
-          min={CONFIG_DEFAULTS.width.min}
-          max={CONFIG_DEFAULTS.width.max}
-          step={CONFIG_DEFAULTS.width.step}
+          min={config.width.min}
+          max={config.width.max}
+          step={config.width.step}
           value={width}
           onChange={(value) => {
             setWidth(value);
@@ -80,9 +80,9 @@ export function Txt2Img(props: Txt2ImgProps) {
         />
         <NumericField
           label='Height'
-          min={CONFIG_DEFAULTS.height.min}
-          max={CONFIG_DEFAULTS.height.max}
-          step={CONFIG_DEFAULTS.height.step}
+          min={config.height.min}
+          max={config.height.max}
+          step={config.height.step}
           value={height}
           onChange={(value) => {
             setHeight(value);
diff --git a/gui/src/config.ts b/gui/src/config.ts
index e18f59a1..f2d7f2e7 100644
--- a/gui/src/config.ts
+++ b/gui/src/config.ts
@@ -1,17 +1,45 @@
 import { Img2ImgParams, STATUS_SUCCESS, Txt2ImgParams } from './api/client.js';
 
+export interface ConfigNumber {
+  default: number;
+  min: number;
+  max: number;
+  step: number;
+}
+
+export interface ConfigString {
+  default: string;
+  keys: Array<string>;
+}
+
+export type KeyFilter<T extends object> = {
+  [K in keyof T]: T[K] extends number ? K : T[K] extends string ? K : never;
+}[keyof T];
+
+export type ConfigRanges<T extends object> = {
+  [K in KeyFilter<T>]: T[K] extends number ? ConfigNumber : T[K] extends string ? ConfigString : never;
+};
+
+export type ConfigParams = ConfigRanges<Required<Img2ImgParams & Txt2ImgParams>>;
+
 export interface Config {
   api: {
     root: string;
   };
-  default: {
-    model: string;
-    platform: string;
-    scheduler: string;
-    prompt: string;
+  params: {
+    model: ConfigString;
+    platform: ConfigString;
+    scheduler: ConfigString;
+    prompt: ConfigString;
   };
 }
 
+export const DEFAULT_BRUSH = 8;
+export const IMAGE_FILTER = '.bmp, .jpg, .jpeg, .png';
+export const IMAGE_STEP = 8;
+export const IMAGE_MAX = 512;
+export const STALE_TIME = 3_000;
+
 export async function loadConfig(): Promise<Config> {
   const configPath = new URL('./config.json', window.origin);
   const configReq = await fetch(configPath);
@@ -21,70 +49,3 @@ export async function loadConfig(): Promise<Config> {
     throw new Error('could not load config');
   }
 }
-
-export interface ConfigRange {
-  default: number;
-  min: number;
-  max: number;
-  step: number;
-}
-
-export type KeyFilter<T extends object> = {
-  [K in keyof T]: T[K] extends number ? K : T[K] extends string ? K : never;
-}[keyof T];
-
-export type ConfigRanges<T extends object> = {
-  [K in KeyFilter<T>]: T[K] extends number ? ConfigRange : T[K] extends string ? string : never;
-};
-
-export const DEFAULT_BRUSH = 8;
-export const IMAGE_FILTER = '.bmp, .jpg, .jpeg, .png';
-export const IMAGE_STEP = 8;
-export const IMAGE_MAX = 512;
-
-export const CONFIG_DEFAULTS: ConfigRanges<Required<Img2ImgParams & Txt2ImgParams>> = {
-  cfg: {
-    default: 6,
-    min: 1,
-    max: 30,
-    step: 0.1,
-  },
-  height: {
-    default: IMAGE_MAX,
-    min: IMAGE_STEP,
-    max: IMAGE_MAX,
-    step: IMAGE_STEP,
-  },
-  model: '',
-  negativePrompt: '',
-  platform: '',
-  prompt: 'an astronaut eating a hamburger',
-  scheduler: '',
-  steps: {
-    default: 25,
-    min: 1,
-    max: 200,
-    step: 1,
-  },
-  seed: {
-    default: -1,
-    min: -1,
-    // eslint-disable-next-line @typescript-eslint/no-magic-numbers
-    max: (2 ** 32) - 1,
-    step: 1,
-  },
-  strength: {
-    default: 0.5,
-    min: 0,
-    max: 1,
-    step: 0.01,
-  },
-  width: {
-    default: IMAGE_MAX,
-    min: IMAGE_STEP,
-    max: IMAGE_MAX,
-    step: IMAGE_STEP,
-  },
-};
-
-export const STALE_TIME = 3_000;
diff --git a/gui/src/main.tsx b/gui/src/main.tsx
index 32c0a63a..0a9fb32f 100644
--- a/gui/src/main.tsx
+++ b/gui/src/main.tsx
@@ -1,22 +1,25 @@
 /* eslint-disable no-console */
 import { mustExist } from '@apextoaster/js-utils';
+import { merge } from 'lodash';
 import * as React from 'react';
 import ReactDOM from 'react-dom/client';
 import { QueryClient, QueryClientProvider } from 'react-query';
 
 import { makeClient } from './api/client.js';
 import { OnnxWeb } from './components/OnnxWeb.js';
-import { loadConfig } from './config.js';
+import { ConfigParams, loadConfig } from './config.js';
 
 export async function main() {
   const config = await loadConfig();
   const client = makeClient(config.api.root);
+  const params = await client.params();
+  const merged = merge(params, config.params) as ConfigParams;
   const query = new QueryClient();
 
   const appElement = mustExist(document.getElementById('app'));
   const app = ReactDOM.createRoot(appElement);
   app.render(<QueryClientProvider client={query}>
-    <OnnxWeb client={client} config={config} />
+    <OnnxWeb client={client} config={merged} />
   </QueryClientProvider>);
 }
 
diff --git a/gui/yarn.lock b/gui/yarn.lock
index cd7d69cf..fb7596a2 100644
--- a/gui/yarn.lock
+++ b/gui/yarn.lock
@@ -541,6 +541,11 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ==
 
+"@types/lodash@^4.14.191":
+  version "4.14.191"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.191.tgz#09511e7f7cba275acd8b419ddac8da9a6a79e2fa"
+  integrity sha512-BdZ5BCCvho3EIXw6wUCXHe7rS53AIDPLE+JzwgT+OsJk53oBfbSmZZ7CX4VaRoN78N+TJpFi9QPlfIVNmJYWxQ==
+
 "@types/mocha@^10.0.1":
   version "10.0.1"
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-10.0.1.tgz#2f4f65bb08bc368ac39c96da7b2f09140b26851b"
@@ -2028,6 +2033,11 @@ lodash.merge@^4.6.2:
   resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
   integrity sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==
 
+lodash@^4.17.21:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
 log-symbols@4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-4.1.0.tgz#3fbdbb95b4683ac9fc785111e792e558d4abd503"