diff --git a/package.json b/package.json
index df9c1ce..990ef00 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,7 @@
     "clean": "rm -rf lib",
     "start": "node lib/index.js",
     "dev": "ts-node src/index.ts",
+    "server-lite": "ts-node src/serverLite.ts",
     "dlob-publish": "ts-node src/publishers/dlobPublisher.ts",
     "trades-publish": "ts-node src/publishers/tradesPublisher.ts",
     "ws-manager": "ts-node src/wsConnectionManager.ts",
diff --git a/src/core/metrics.ts b/src/core/metrics.ts
index 6b102f7..09e920f 100644
--- a/src/core/metrics.ts
+++ b/src/core/metrics.ts
@@ -7,13 +7,6 @@ import {
 	MeterProvider,
 	View,
 } from '@opentelemetry/sdk-metrics-base';
-import {
-	ORDERBOOK_UPDATE_INTERVAL,
-	commitHash,
-	driftEnv,
-	endpoint,
-	wsEndpoint,
-} from '..';
 import { SlotSource } from '@drift-labs/sdk';
 
 /**
@@ -93,15 +86,6 @@ const runtimeSpecsGauge = meter.createObservableGauge(
 		description: 'Runtime sepcification of this program',
 	}
 );
-const bootTimeMs = Date.now();
-runtimeSpecsGauge.addCallback((obs) => {
-	obs.observe(bootTimeMs, {
-		commit: commitHash,
-		driftEnv,
-		rpcEndpoint: endpoint,
-		wsEndpoint: wsEndpoint,
-	});
-});
 
 let healthStatus: HEALTH_STATUS = HEALTH_STATUS.Ok;
 const healthStatusGauge = meter.createObservableGauge(
@@ -171,7 +155,7 @@ const responseStatusCounter = meter.createCounter(
 	}
 );
 
-const healthCheckInterval = 2 * (ORDERBOOK_UPDATE_INTERVAL ?? 1000); // ORDERBOOK_UPDATE_INTERVAL is NaN here for some reason ... hardcode to 1000.
+const healthCheckInterval = 2000;
 let lastHealthCheckSlot = -1;
 let lastHealthCheckState = true; // true = healthy, false = unhealthy
 let lastHealthCheckPerformed = Date.now() - healthCheckInterval;
@@ -245,4 +229,5 @@ export {
 	setLastReceivedWsMsgTs,
 	accountUpdatesCounter,
 	cacheHitCounter,
+	runtimeSpecsGauge,
 };
diff --git a/src/index.ts b/src/index.ts
index b117104..44f73fd 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -39,6 +39,7 @@ import {
 	accountUpdatesCounter,
 	cacheHitCounter,
 	setLastReceivedWsMsgTs,
+	runtimeSpecsGauge,
 } from './core/metrics';
 import { handleResponseTime } from './core/middleware';
 import {
@@ -125,6 +126,17 @@ app.use((req, _res, next) => {
 	next();
 });
 
+// Metrics defined here
+const bootTimeMs = Date.now();
+runtimeSpecsGauge.addCallback((obs) => {
+	obs.observe(bootTimeMs, {
+		commit: commitHash,
+		driftEnv,
+		rpcEndpoint: endpoint,
+		wsEndpoint: wsEndpoint,
+	});
+});
+
 app.use(errorHandler);
 const server = http.createServer(app);
 
diff --git a/src/serverLite.ts b/src/serverLite.ts
new file mode 100644
index 0000000..8a03b22
--- /dev/null
+++ b/src/serverLite.ts
@@ -0,0 +1,464 @@
+import { program } from 'commander';
+import compression from 'compression';
+import cors from 'cors';
+import express from 'express';
+import rateLimit from 'express-rate-limit';
+import morgan from 'morgan';
+
+import { Commitment, Connection } from '@solana/web3.js';
+
+import { logger, setLogLevel } from './utils/logger';
+
+import * as http from 'http';
+import {
+	handleHealthCheck,
+	cacheHitCounter,
+	runtimeSpecsGauge,
+} from './core/metrics';
+import { handleResponseTime } from './core/middleware';
+import { errorHandler, normalizeBatchQueryParams, sleep } from './utils/utils';
+import { RedisClient } from './utils/redisClient';
+import {
+	DriftEnv,
+	MarketType,
+	PerpMarkets,
+	SlotSubscriber,
+	SpotMarkets,
+	isVariant,
+	initialize,
+} from '@drift-labs/sdk';
+
+require('dotenv').config();
+
+const REDIS_HOST = process.env.REDIS_HOST || 'localhost';
+const REDIS_PORT = process.env.REDIS_PORT || '6379';
+const REDIS_PASSWORD = process.env.REDIS_PASSWORD;
+
+const driftEnv = (process.env.ENV || 'devnet') as DriftEnv;
+const commitHash = process.env.COMMIT;
+//@ts-ignore
+const sdkConfig = initialize({ env: process.env.ENV });
+
+const stateCommitment: Commitment = 'processed';
+const serverPort = process.env.PORT || 6969;
+const rateLimitCallsPerSecond = process.env.RATE_LIMIT_CALLS_PER_SECOND
+	? parseInt(process.env.RATE_LIMIT_CALLS_PER_SECOND)
+	: 1;
+
+const SLOT_STALENESS_TOLERANCE =
+	parseInt(process.env.SLOT_STALENESS_TOLERANCE) || 20;
+const loadTestAllowed = process.env.ALLOW_LOAD_TEST?.toLowerCase() === 'true';
+
+const logFormat =
+	':remote-addr - :remote-user [:date[clf]] ":method :url HTTP/:http-version" :status :res[content-length] ":referrer" ":user-agent" :req[x-forwarded-for]';
+const logHttp = morgan(logFormat, {
+	skip: (_req, res) => res.statusCode <= 500,
+});
+
+const app = express();
+app.use(cors({ origin: '*' }));
+app.use(compression());
+app.set('trust proxy', 1);
+app.use(logHttp);
+app.use(handleResponseTime);
+app.use(
+	rateLimit({
+		windowMs: 1000, // 1 second
+		max: rateLimitCallsPerSecond,
+		standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
+		legacyHeaders: false, // Disable the `X-RateLimit-*` headers
+		skip: (req, _res) => {
+			if (!loadTestAllowed) {
+				return false;
+			}
+
+			return req.headers['user-agent'].includes('k6');
+		},
+	})
+);
+
+// Metrics defined here
+const bootTimeMs = Date.now();
+runtimeSpecsGauge.addCallback((obs) => {
+	obs.observe(bootTimeMs, {
+		commit: commitHash,
+		driftEnv,
+		rpcEndpoint: endpoint,
+		wsEndpoint: wsEndpoint,
+	});
+});
+
+// strip off /dlob, if the request comes from exchange history server LB
+app.use((req, _res, next) => {
+	if (req.url.startsWith('/dlob')) {
+		req.url = req.url.replace('/dlob', '');
+		if (req.url === '') {
+			req.url = '/';
+		}
+	}
+	next();
+});
+
+app.use(errorHandler);
+const server = http.createServer(app);
+
+// Default keepalive is 5s, since the AWS ALB timeout is 60 seconds, clients
+// sometimes get 502s.
+// https://shuheikagawa.com/blog/2019/04/25/keep-alive-timeout/
+// https://stackoverflow.com/a/68922692
+server.keepAliveTimeout = 61 * 1000;
+server.headersTimeout = 65 * 1000;
+
+const opts = program.opts();
+setLogLevel(opts.debug ? 'debug' : 'info');
+
+const endpoint = process.env.ENDPOINT;
+const wsEndpoint = process.env.WS_ENDPOINT;
+logger.info(`RPC endpoint:       ${endpoint}`);
+logger.info(`WS endpoint:        ${wsEndpoint}`);
+logger.info(`DriftEnv:           ${driftEnv}`);
+logger.info(`Commit:             ${commitHash}`);
+
+const main = async () => {
+	// Redis connect
+	logger.info('Connecting to redis');
+	const redisClient = new RedisClient(REDIS_HOST, REDIS_PORT, REDIS_PASSWORD);
+	await redisClient.connect();
+
+	// Slot subscriber for source
+	const connection = new Connection(endpoint, {
+		commitment: stateCommitment,
+		wsEndpoint,
+	});
+	const slotSubscriber = new SlotSubscriber(connection);
+	await slotSubscriber.subscribe();
+
+	app.get(
+		'/health',
+		handleHealthCheck(2 * SLOT_STALENESS_TOLERANCE * 400, slotSubscriber)
+	);
+	app.get(
+		'/',
+		handleHealthCheck(2 * SLOT_STALENESS_TOLERANCE * 400, slotSubscriber)
+	);
+
+	app.get('/l2', async (req, res, next) => {
+		try {
+			const {
+				marketIndex,
+				marketType,
+				depth,
+				includeVamm,
+				includePhoenix,
+				includeSerum,
+				grouping, // undefined or PRICE_PRECISION
+				includeOracle,
+			} = req.query;
+
+			const { normedMarketType, normedMarketIndex, error } = validateDlobQuery(
+				driftEnv,
+				marketType as string,
+				marketIndex as string
+			);
+			if (error) {
+				res.status(400).send(error);
+				return;
+			}
+
+			const isSpot = isVariant(normedMarketType, 'spot');
+
+			let adjustedDepth = depth ?? '10';
+			if (grouping !== undefined) {
+				// If grouping is also supplied, we want the entire book depth.
+				// we will apply depth after grouping
+				adjustedDepth = '-1';
+			}
+
+			let l2Formatted: any;
+			let slotDiff: number;
+			if (
+				!isSpot &&
+				`${includeVamm}`.toLowerCase() === 'true' &&
+				`${includeOracle}`.toLowerCase().toLowerCase() === 'true' &&
+				!grouping
+			) {
+				let redisL2: string;
+				if (parseInt(adjustedDepth as string) === 5) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_perp_${normedMarketIndex}_depth_5`
+					);
+				} else if (parseInt(adjustedDepth as string) === 20) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_perp_${normedMarketIndex}_depth_20`
+					);
+				} else if (parseInt(adjustedDepth as string) === 100) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_perp_${normedMarketIndex}_depth_100`
+					);
+				}
+				if (redisL2) {
+					slotDiff =
+						slotSubscriber.getSlot() - parseInt(JSON.parse(redisL2).slot);
+					if (slotDiff < SLOT_STALENESS_TOLERANCE) {
+						l2Formatted = redisL2;
+					}
+				}
+			} else if (
+				isSpot &&
+				`${includeSerum}`.toLowerCase() === 'true' &&
+				`${includePhoenix}`.toLowerCase() === 'true' &&
+				`${includeOracle}`.toLowerCase() === 'true' &&
+				!grouping
+			) {
+				let redisL2: string;
+				if (parseInt(adjustedDepth as string) === 5) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_spot_${normedMarketIndex}_depth_5`
+					);
+				} else if (parseInt(adjustedDepth as string) === 20) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_spot_${normedMarketIndex}_depth_20`
+					);
+				} else if (parseInt(adjustedDepth as string) === 100) {
+					redisL2 = await redisClient.client.get(
+						`last_update_orderbook_spot_${normedMarketIndex}_depth_100`
+					);
+				}
+				if (redisL2) {
+					slotDiff =
+						slotSubscriber.getSlot() - parseInt(JSON.parse(redisL2).slot);
+					if (slotDiff < SLOT_STALENESS_TOLERANCE) {
+						l2Formatted = redisL2;
+					}
+				}
+			}
+
+			if (l2Formatted) {
+				cacheHitCounter.add(1, {
+					miss: false,
+				});
+				res.writeHead(200);
+				res.end(l2Formatted);
+				return;
+			} else {
+				if (slotDiff) {
+					res.writeHead(500);
+					res.end(`Slot too stale : ${slotDiff}`);
+				} else {
+					res.writeHead(400);
+					res.end(`Bad Request: no cached L2 found`);
+				}
+			}
+		} catch (err) {
+			next(err);
+		}
+	});
+
+	app.get('/batchL2', async (req, res, next) => {
+		try {
+			const {
+				marketName,
+				marketIndex,
+				marketType,
+				depth,
+				includeVamm,
+				includePhoenix,
+				includeSerum,
+				includeOracle,
+				grouping, // undefined or PRICE_PRECISION
+			} = req.query;
+
+			const normedParams = normalizeBatchQueryParams({
+				marketName: marketName as string | undefined,
+				marketIndex: marketIndex as string | undefined,
+				marketType: marketType as string | undefined,
+				depth: depth as string | undefined,
+				includeVamm: includeVamm as string | undefined,
+				includePhoenix: includePhoenix as string | undefined,
+				includeSerum: includeSerum as string | undefined,
+				includeOracle: includeOracle as string | undefined,
+				grouping: grouping as string | undefined,
+			});
+
+			if (normedParams === undefined) {
+				res
+					.status(400)
+					.send(
+						'Bad Request: all params for batch request must be the same length'
+					);
+				return;
+			}
+
+			const l2s = await Promise.all(
+				normedParams.map(async (normedParam) => {
+					const { normedMarketType, normedMarketIndex, error } =
+						validateDlobQuery(
+							driftEnv,
+							normedParam['marketType'] as string,
+							normedParam['marketIndex'] as string
+						);
+					if (error) {
+						res.status(400).send(`Bad Request: ${error}`);
+						return;
+					}
+
+					const isSpot = isVariant(normedMarketType, 'spot');
+
+					let adjustedDepth = normedParam['depth'] ?? '10';
+					if (normedParam['grouping'] !== undefined) {
+						// If grouping is also supplied, we want the entire book depth.
+						// we will apply depth after grouping
+						adjustedDepth = '-1';
+					}
+
+					let l2Formatted: any;
+					if (
+						!isSpot &&
+						normedParam['includeVamm'].toLowerCase() === 'true' &&
+						normedParam['includeOracle'].toLowerCase() === 'true' &&
+						!normedParam['grouping']
+					) {
+						let redisL2: string;
+						if (parseInt(adjustedDepth as string) === 5) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_perp_${normedMarketIndex}_depth_5`
+							);
+						} else if (parseInt(adjustedDepth as string) === 20) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_perp_${normedMarketIndex}_depth_20`
+							);
+						} else if (parseInt(adjustedDepth as string) === 100) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_perp_${normedMarketIndex}_depth_100`
+							);
+						}
+						if (redisL2) {
+							const parsedRedisL2 = JSON.parse(redisL2);
+							if (
+								slotSubscriber.getSlot() - parseInt(parsedRedisL2.slot) <
+								SLOT_STALENESS_TOLERANCE
+							)
+								l2Formatted = parsedRedisL2;
+						}
+					} else if (
+						isSpot &&
+						normedParam['includePhoenix'].toLowerCase() === 'true' &&
+						normedParam['includeSerum'].toLowerCase() === 'true' &&
+						!normedParam['grouping']
+					) {
+						let redisL2: string;
+						if (parseInt(adjustedDepth as string) === 5) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_spot_${normedMarketIndex}_depth_5`
+							);
+						} else if (parseInt(adjustedDepth as string) === 20) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_spot_${normedMarketIndex}_depth_20`
+							);
+						} else if (parseInt(adjustedDepth as string) === 100) {
+							redisL2 = await redisClient.client.get(
+								`last_update_orderbook_spot_${normedMarketIndex}_depth_100`
+							);
+						}
+						if (redisL2) {
+							const parsedRedisL2 = JSON.parse(redisL2);
+							if (
+								slotSubscriber.getSlot() - parseInt(parsedRedisL2.slot) <
+								SLOT_STALENESS_TOLERANCE
+							)
+								l2Formatted = parsedRedisL2;
+						}
+
+						if (l2Formatted) {
+							cacheHitCounter.add(1, {
+								miss: false,
+							});
+							return l2Formatted;
+						}
+					}
+				})
+			);
+
+			res.writeHead(200);
+			res.end(JSON.stringify({ l2s }));
+		} catch (err) {
+			next(err);
+		}
+	});
+
+	server.listen(serverPort, () => {
+		logger.info(`DLOB server listening on port http://localhost:${serverPort}`);
+	});
+};
+
+export const validateDlobQuery = (
+	driftEnv: DriftEnv,
+	marketType?: string,
+	marketIndex?: string
+): {
+	normedMarketType?: MarketType;
+	normedMarketIndex?: number;
+	error?: string;
+} => {
+	let normedMarketType: MarketType = undefined;
+	let normedMarketIndex: number = undefined;
+	if (marketIndex === undefined || marketType === undefined) {
+		return {
+			error:
+				'Bad Request: (marketName) or (marketIndex and marketType) must be supplied',
+		};
+	}
+
+	// validate marketType
+	switch ((marketType as string).toLowerCase()) {
+		case 'spot': {
+			normedMarketType = MarketType.SPOT;
+			normedMarketIndex = parseInt(marketIndex as string);
+			const spotMarketIndicies = SpotMarkets[driftEnv].map(
+				(mkt) => mkt.marketIndex
+			);
+			if (!spotMarketIndicies.includes(normedMarketIndex)) {
+				return {
+					error: 'Bad Request: invalid marketIndex',
+				};
+			}
+			break;
+		}
+		case 'perp': {
+			normedMarketType = MarketType.PERP;
+			normedMarketIndex = parseInt(marketIndex as string);
+			const perpMarketIndicies = PerpMarkets[driftEnv].map(
+				(mkt) => mkt.marketIndex
+			);
+			if (!perpMarketIndicies.includes(normedMarketIndex)) {
+				return {
+					error: 'Bad Request: invalid marketIndex',
+				};
+			}
+			break;
+		}
+		default:
+			return {
+				error: 'Bad Request: marketType must be either "spot" or "perp"',
+			};
+	}
+
+	return {
+		normedMarketType,
+		normedMarketIndex,
+	};
+};
+
+async function recursiveTryCatch(f: () => void) {
+	try {
+		await f();
+	} catch (e) {
+		console.error(e);
+		await sleep(15000);
+		await recursiveTryCatch(f);
+	}
+}
+
+recursiveTryCatch(() => main());
+
+export { commitHash, endpoint, sdkConfig, wsEndpoint };