diff --git a/integration/index.js b/integration/index.js
index 5ffedeb3..3e2b12f2 100644
--- a/integration/index.js
+++ b/integration/index.js
@@ -14,6 +14,8 @@ var sinon = require('sinon');
 var txData = require('./livenet-tx-data.json');
 var blockData = require('./livenet-block-data.json');
 var testTxData = require('./livenet-tx-data.json');
+var spentData = require('./livenet-spents.json').spent;
+var unspentData = require('./livenet-spents.json').unspent;
 var testBlockData = require('./testnet-block-data.json');
 
 describe('Basic Functionality', function() {
@@ -59,9 +61,25 @@ describe('Basic Functionality', function() {
       });
     });
   });
+    
+  describe.only('determine if outpoint is unspent/spent', function() {
+    spentData.forEach(function(data) {
+      it('for txid ' + data.txid + ' and output ' + data.outputIndex, function() {
+        var spent = bitcoind.isSpent(data.txid, data.outputIndex, true);
+        spent.should.equal(true);
+      });
+    });
+
+    unspentData.forEach(function(data) {
+      it('for txid ' + data.txid + ' and output ' + data.outputIndex, function() {
+        var spent = bitcoind.isSapent(data.txid, data.outputIndex, true);
+        spent.should.equal(false);
+      });
+    });
+  });
 
   describe('get blocks by hash', function() {
-
+    
     blockData.forEach(function(data) {
       var block = bitcore.Block.fromString(data);
       it('block ' + block.hash, function(done) {
diff --git a/integration/livenet-spents.json b/integration/livenet-spents.json
new file mode 100644
index 00000000..d8b84e52
--- /dev/null
+++ b/integration/livenet-spents.json
@@ -0,0 +1,18 @@
+{
+  "unspent": [
+    {
+      "txid": "0e3e2357e806b6cdb1f70b54c3a3a17b6714ee1f0e68bebb44a74b1efd512098",
+      "outputIndex": 0
+    }
+  ],
+  "spent": [
+    {
+      "txid": "0437cd7f8525ceed2324359c2d0ba26006d92d856a9c20fa0241106ee5a597c9",
+      "outputIndex": 0
+    },
+    {
+      "txid": "fff2525b8931402dd09222c50775608f75787bd2b87e56995a7bdd30f79702c4",
+      "outputIndex": 1
+    }
+  ]
+}
diff --git a/lib/bitcoind.js b/lib/bitcoind.js
index 045f4039..e9b6095a 100644
--- a/lib/bitcoind.js
+++ b/lib/bitcoind.js
@@ -323,6 +323,10 @@ Bitcoin.prototype.getBlockHeight = function(height, callback) {
   });
 };
 
+Bitcoin.prototype.isSpent = function(txid, outputIndex, queryMempool) {
+  return bitcoindjs.isSpent(txid, outputIndex, queryMempool);
+};
+
 Bitcoin.prototype.getTransaction =
 Bitcoin.prototype.getTx = function(txid, blockhash, callback) {
   if (bitcoin.stopping) return [];
diff --git a/src/bitcoindjs.cc b/src/bitcoindjs.cc
index 38e81bd9..cbf6870f 100644
--- a/src/bitcoindjs.cc
+++ b/src/bitcoindjs.cc
@@ -930,6 +930,43 @@ async_get_tx_after(uv_work_t *req) {
   delete req;
 }
 
+/**
+ * IsSpent()
+ * bitcoindjs.isSpent()
+ * Determine if an outpoint is spent
+ */
+NAN_METHOD(IsSpent) {
+  NanScope();
+
+  if (args.Length() > 3) {
+    return NanThrowError(
+      "Usage: bitcoindjs.isSpent(txid, outputIndex, queryMempool)");
+  }
+
+  // XXX: include the mempool in the coins viewcache
+
+  String::Utf8Value arg(args[0]->ToString());
+  std::string argStr = std::string(*arg);
+  const uint256 txid = uint256S(argStr);
+  int outputIndex = args[1]->IntegerValue();
+  bool queryMempool = args[2]->BooleanValue();
+
+  CCoinsViewCache &view = *pcoinsTip;
+
+  if (view.HaveCoins(txid)) {
+    const CCoins* coins = view.AccessCoins(txid);
+    if (!coins || !coins->IsAvailable(outputIndex)) {
+      NanReturnValue(NanNew<Boolean>(false));
+      return;
+    }
+  } else {
+    NanReturnValue(NanNew<Boolean>(false));
+    return;
+  }
+
+  NanReturnValue(NanNew<Boolean>(true));
+};
+
 /**
  * GetInfo()
  * bitcoindjs.getInfo()
@@ -997,6 +1034,7 @@ init(Handle<Object> target) {
   NODE_SET_METHOD(target, "getBlock", GetBlock);
   NODE_SET_METHOD(target, "getTransaction", GetTransaction);
   NODE_SET_METHOD(target, "getInfo", GetInfo);
+  NODE_SET_METHOD(target, "isSpent", IsSpent);
 
 }
 
diff --git a/src/bitcoindjs.h b/src/bitcoindjs.h
index 571e0c39..3a965149 100644
--- a/src/bitcoindjs.h
+++ b/src/bitcoindjs.h
@@ -27,3 +27,4 @@ NAN_METHOD(StopBitcoind);
 NAN_METHOD(GetBlock);
 NAN_METHOD(GetTransaction);
 NAN_METHOD(GetInfo);
+NAN_METHOD(IsSpent);