diff --git a/server/lib/api/address.js b/server/lib/api/address.js
index cc9c077..1472f1b 100644
--- a/server/lib/api/address.js
+++ b/server/lib/api/address.js
@@ -1,21 +1,14 @@
 const logger  = require('../logger');
-const util    = require('../util');
 const db      = require('../db');
 
 module.exports = function AddressAPI(router) {
   router.get('/addr/:addr', (req, res) => {
     const addr = req.params.addr || '';
 
-    if (!util.isBitcoinAddress(addr)) {
-      return res.status(404).send({
-        error: 'Invalid bitcoin address',
-      });
-    }
-
-    return db.txs.getTxByAddress(addr, 0, 999999999, (error, txs) => {
-      if (error) {
+    return db.txs.getTxByAddress(addr, 0, 999999999, (err, txs) => {
+      if (err || txs.length === 0) {
         logger.log('error',
-          `getTxByBlock ${error}`);
+          `getTxByBlock ${err}`);
         return res.status(404).send();
       }
 
diff --git a/server/lib/api/block.js b/server/lib/api/block.js
index 3041c2c..9ca7636 100644
--- a/server/lib/api/block.js
+++ b/server/lib/api/block.js
@@ -1,17 +1,10 @@
 const logger = require('../logger');
 const db     = require('../db');
-const util   = require('../util');
 
 module.exports = function BlockAPI(router) {
   router.get('/block/:blockHash', (req, res) => {
     const blockHash = req.params.blockHash;
 
-    if (!util.isBlockHash(blockHash)) {
-      return res.status(404).send({
-        error: 'Invalid bitcoin address',
-      });
-    }
-
     // Pass Mongo params, fields and limit to db api.
     return db.blocks.getByHash(blockHash,
       (err, block) => {
@@ -70,12 +63,6 @@ module.exports = function BlockAPI(router) {
   router.get('/rawblock/:blockHash', (req, res) => {
     const blockHash = req.params.blockHash || '';
 
-    if (!util.isBlockHash(blockHash)) {
-      return res.status(400).send({
-        error: 'Invalid bitcoin address',
-      });
-    }
-
     // Pass Mongo params, fields and limit to db api.
     return db.blocks.getRawBlock(blockHash,
       (err, block) => {
diff --git a/server/lib/api/index.js b/server/lib/api/index.js
index c8aced1..db8693a 100644
--- a/server/lib/api/index.js
+++ b/server/lib/api/index.js
@@ -2,6 +2,7 @@ const express    = require('express');
 const config     = require('../../config');
 const bodyParser = require('body-parser');
 const helmet     = require('helmet');
+const sanitizer  = require('./middleware/sanitizer');
 
 const app = express();
 const api = express.Router();
@@ -11,11 +12,9 @@ app.use(cors);
 app.use(helmet());
 app.use(bodyParser.urlencoded({ extended: false }));
 app.use(bodyParser.json());
-
+app.use(sanitizer);
 // Serve insight ui front end from root dir public folder
 app.use(express.static('../app/www', { maxage: '1w' }));
-// Legacy UI - useful for 1:1 compares
-// app.use(express.static('./public', { maxage: '1w' }));
 
 app.set('json spaces', config.api.json_spaces);
 
diff --git a/server/lib/api/message.js b/server/lib/api/message.js
index e6e01b3..2ec2d13 100644
--- a/server/lib/api/message.js
+++ b/server/lib/api/message.js
@@ -1,17 +1,10 @@
 const Message = require('bitcore-message');
-const util    = require('../util');
 // Copied from previous source
 function verifyMessage(req, res) {
   const address   = req.body.address || req.query.address;
   const signature = req.body.signature || req.query.signature;
   const message   = req.body.message || req.query.message;
 
-  if (!util.isBitcoinAddress(address)) {
-    return res.status(400).send({
-      error: 'Invalid bitcoin address',
-    });
-  }
-
   if (!address || !signature || !message) {
     return res.json({
       message: 'Missing parameters (expected "address", "signature" and "message")',
diff --git a/server/lib/api/middleware/sanitizer.js b/server/lib/api/middleware/sanitizer.js
new file mode 100644
index 0000000..a8fb1de
--- /dev/null
+++ b/server/lib/api/middleware/sanitizer.js
@@ -0,0 +1,140 @@
+const util = require('../../util');
+
+// Strip the request, sanitize inputs, rebuild
+module.exports = function sanitize(req, res, next) {
+  const params = req.params || null;
+  const body   = req.body || null;
+  const query  = req.query || null;
+
+  let cleanParams = null;
+  let cleanBody   = null;
+  let cleanQuery  = null;
+
+  // req.params
+  if (params) {
+    // Transaction Id
+    if (params.txid  && !util.isTxid(params.txid)) {
+      return res.status(404).send({
+        error: 'Invalid Transaction Id',
+      });
+    }
+    // Address
+    if (params.addr && typeof (params.addr) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Bitcoin Address',
+      });
+    }
+    // Block Hash
+    if (params.blockHash && typeof (params.blockHash) !== 'string')  {
+      return res.status(404).send({
+        error: 'Invalid Block Hash',
+      });
+    }
+    // Height
+    if (params.height) {
+      if (typeof (params.height) !== 'number')  {
+        return res.status(404).send({
+          error: 'Invalid Block Hash',
+        });
+      }
+      params.height = parseInt(params.height, 10);
+    }
+
+    cleanParams = {
+      txid:      params.txid      || null,
+      addr:      params.addr      || null,
+      blockHash: params.blockHash || null,
+      height:    params.height    || null,
+    };
+  }
+
+  // req.body
+  if (body) {
+    // Signature
+    if (body.signature && typeof (body.signature) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Signature',
+      });
+    }
+    // Message
+    if (body.message && typeof (body.message) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Message',
+      });
+    }
+    // Address
+    if (body.address && !util.isBitcoinAddress(body.address)) {
+      return res.status(404).send({
+        error: 'Invalid Bitcoin Address',
+      });
+    }
+    cleanBody = {
+      signature: body.signature || null,
+      message:   body.message   || null,
+      address:   body.address   || null,
+    };
+  }
+
+  if (query) {
+    // Address
+    if (query.address && !util.isBitcoinAddress(query.address)) {
+      return res.status(404).send({
+        error: 'Invalid Bitcoin Address',
+      });
+    }
+    // Signature
+    if (query.signature && typeof (query.signature) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Signature',
+      });
+    }
+    // Message
+    if (query.message && typeof (query.message) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Message',
+      });
+    }
+    // q
+    if (query.q && typeof (query.q) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Q',
+      });
+    }
+    // Page Number
+    if (query.pageNum && typeof (query.pageNum) !== 'number') {
+      return res.status(404).send({
+        error: 'Invalid Page Number',
+      });
+    }
+    // Block (hash - implicit)
+    if (query.block && typeof (query.block) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Block',
+      });
+    }
+    // Raw Tx
+    if (query.rawtx && typeof (query.rawtx) !== 'string') {
+      return res.status(404).send({
+        error: 'Invalid Bitcoin Address',
+      });
+    }
+
+    cleanQuery = {
+      address:   query.address   || null,
+      signature: query.signature || null,
+      message:   query.message   || null,
+      q:         query.q         || null,
+      pageNum:   query.pageNum   || null,
+      block:     query.block     || null,
+      rawtx:     query.rawtx     || null,
+    };
+  }
+
+  // Strip off unexpected params
+  req.params = cleanParams;
+  req.body   = cleanBody;
+  req.query  = cleanQuery;
+
+  return next();
+};
+
diff --git a/server/lib/api/transaction.js b/server/lib/api/transaction.js
index 1552e07..00b29c6 100644
--- a/server/lib/api/transaction.js
+++ b/server/lib/api/transaction.js
@@ -2,34 +2,24 @@ const logger = require('../logger');
 const request = require('request');
 const config = require('../../config');
 const db = require('../db');
-const util = require('../util');
 
 const API_URL = `http://${config.bcoin_http}:${config.bcoin['http-port']}`;
 const MAX_TXS = config.api.max_txs;
-const TTL     = config.api.request_ttl;
 
 module.exports = function transactionAPI(router) {
   // Txs by txid
   router.get('/tx/:txid', (req, res) => {
-    if (!util.isTxid(req.params.txid)) {
-      return res.status(404).send({
-        error: 'Invalid transaction id',
-      });
-    }
-
     // Get max block height for calculating confirmations
     const height = db.blocks.bestHeight();
-    // Bcoin transaction data
     const txid = req.params.txid || '';
 
-    db.txs.getTxById(txid, (err, transaction) => {
-      if (err || !transaction) {
+    return db.txs.getTxById(txid, (err, tx) => {
+      if (err || !tx) {
         logger.log('error',
-          `/tx/:tid getTxById: ${err.err}`);
+          `/tx/:tid getTxById: ${err ? err.err : ''}`);
         return res.status(404).send();
       }
 
-      const tx = transaction;
       return res.send({
         txid: tx.hash,
         version: tx.version,
@@ -61,17 +51,9 @@ module.exports = function transactionAPI(router) {
   // query by address
   router.get('/txs', (req, res) => {
     const pageNum    = parseInt(req.query.pageNum, 10)  || 0;
-    const rangeStart = pageNum * MAX_TXS;
-    const rangeEnd   = rangeStart + MAX_TXS;
     const height     = db.blocks.bestHeight();
     // get txs for blockhash, start with best height to calc confirmations
     if (req.query.block) {
-      if (!util.isBlockHash(req.query.block)) {
-        return res.status(400).send({
-          error: 'Invalid block hash',
-        });
-      }
-
       return db.txs.getTxCountByBlock(req.query.block, (err, count) => {
         if (err) {
           logger.log('error',
@@ -115,16 +97,10 @@ module.exports = function transactionAPI(router) {
         });
       });
     } else if (req.query.address) {
-      if (!util.isBitcoinAddress(req.query.address)) {
-        return res.status(400).send({
-          error: 'Invalid bitcoin address',
-        });
-      }
-
       // Get txs by address, start with best height to calc confirmations
       const addr = req.query.address || '';
 
-      db.txs.getTxCountByAddress(req.query.address, (err, count) => {
+      return db.txs.getTxCountByAddress(addr, (err, count) => {
         if (err) {
           logger.log('error',
             `getTxByBlock ${err}`);
@@ -132,7 +108,7 @@ module.exports = function transactionAPI(router) {
         }
         const totalPages = Math.ceil(count / MAX_TXS);
 
-        return db.txs.getTxByAddress(req.query.address, pageNum, MAX_TXS, (error, txs) => {
+        return db.txs.getTxByAddress(addr, pageNum, MAX_TXS, (error, txs) => {
           if (error) {
             logger.log('error',
               `getTxByBlock ${error}`);
@@ -165,39 +141,38 @@ module.exports = function transactionAPI(router) {
           });
         });
       });
-    } else {
-      // Get last n txs
-      db.txs.getTopTransactions((err, txs) => {
-        if (err) {
-          logger.log('err',
-            `/txs getTopTransactions ${err}`);
-          return res.status(404).send(err);
-        }
-        return res.send(txs.map(tx => ({
-          txid: tx.hash,
-          fees: tx.fee / 1e8,
-          size: tx.size,
-          confirmations: (height - tx.height) + 1,
-          valueOut: tx.outputs.reduce((sum, output) => sum + output.value, 0) / 1e8,
-          vin: tx.inputs.map(input => ({
-            scriptSig: {
-              asm: input.script,
-            },
-            addr: input.address,
-            value: input.value / 1e8,
-          })),
-          vout: tx.outputs.map(output => ({
-            scriptPubKey: {
-              asm: output.script,
-              addresses: [output.address],
-            },
-            value: output.value / 1e8,
-          })),
-          isCoinBase: tx.inputs[0].prevout.hash === '0000000000000000000000000000000000000000000000000000000000000000',
-        })),
-        );
-      });
     }
+    // Get last n txs
+    return db.txs.getTopTransactions((err, txs) => {
+      if (err) {
+        logger.log('err',
+          `/txs getTopTransactions ${err}`);
+        return res.status(404).send(err);
+      }
+      return res.send(txs.map(tx => ({
+        txid: tx.hash,
+        fees: tx.fee / 1e8,
+        size: tx.size,
+        confirmations: (height - tx.height) + 1,
+        valueOut: tx.outputs.reduce((sum, output) => sum + output.value, 0) / 1e8,
+        vin: tx.inputs.map(input => ({
+          scriptSig: {
+            asm: input.script,
+          },
+          addr: input.address,
+          value: input.value / 1e8,
+        })),
+        vout: tx.outputs.map(output => ({
+          scriptPubKey: {
+            asm: output.script,
+            addresses: [output.address],
+          },
+          value: output.value / 1e8,
+        })),
+        isCoinBase: tx.inputs[0].prevout.hash === '0000000000000000000000000000000000000000000000000000000000000000',
+      })),
+      );
+    });
   });
 
   router.get('/rawtx/:txid', (req, res) => res.send(req.params.txid));
diff --git a/server/models/transaction.js b/server/models/transaction.js
index 2376357..f6f5c0e 100644
--- a/server/models/transaction.js
+++ b/server/models/transaction.js
@@ -7,7 +7,6 @@ const config = require('../config');
 const Schema = mongoose.Schema;
 // These limits can be overriden higher up the stack
 const MAX_TXS = config.api.max_txs;
-const MAX_PAGE_TXS = config.api.max_page_txs;
 
 const TransactionSchema = new Schema({
   hash:        { type: String, default: '' },