diff --git a/package.json b/package.json
index 3fcda03..aed9f2a 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "test:integration:testnet:local": "RESTURL=http://localhost:4000/v3/ mocha --timeout 30000 test/integration/testnet",
     "test:integration:free": "bash test/integration/test-free-tier.sh",
     "test:integration:free:testnet": "bash test/integration/testnet/test-free-tier.sh",
-    "test:temp": "nyc mocha --timeout 30000 test/unit/ipfs.js",
+    "test:temp": "mocha --timeout 30000 test/integration/testnet/ninsight.js",
     "test:integration:api": "RESTURL=https://api.fullstack.cash/v3/ mocha --timeout 30000 test/integration",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "coverage:report": "nyc --reporter=html mocha --timeout 25000 test/unit/",
diff --git a/src/bch-js.js b/src/bch-js.js
index 43b6532..7cbf12a 100644
--- a/src/bch-js.js
+++ b/src/bch-js.js
@@ -69,7 +69,7 @@ class BCHJS {
     this.OpenBazaar = new OpenBazaar(libConfig)
 
     // Bitcoin.com Ninsight indexer
-    this.Ninsight = new Ninsight()
+    this.Ninsight = new Ninsight(config)
 
     // ElectrumX indexer
     this.Electrumx = new Electrumx(libConfig)
diff --git a/src/ninsight.js b/src/ninsight.js
index 6b0f41c..eba6833 100644
--- a/src/ninsight.js
+++ b/src/ninsight.js
@@ -13,7 +13,11 @@ class Ninsight {
     // this.apiToken = config.apiToken
 
     // this.ninsightURL = `https://bch-explorer.api.bitcoin.com/v1/`
-    this.ninsightURL = `https://rest.bitcoin.com/v2`
+    if (config) {
+      this.ninsightURL = config.ninsightURL
+        ? config.ninsightURL
+        : `https://rest.bitcoin.com/v2`
+    }
 
     // Add JWT token to the authorization header.
     this.axiosOptions = {
@@ -62,15 +66,38 @@ class Ninsight {
    */
   async utxo(address) {
     try {
-      if (typeof address !== "string")
-        throw new Error(`address needs to be a string.`)
+      // if (typeof address !== "string")
+      //   throw new Error(`address needs to be a string.`)
+      //
+      // const response = await axios.get(
+      //   `${this.ninsightURL}/address/utxo/${address}`,
+      //   _this.axiosOptions
+      // )
 
-      const response = await axios.get(
-        `${this.ninsightURL}/address/utxo/${address}`,
-        _this.axiosOptions
-      )
+      // return response.data
 
-      return response.data
+      // Handle single address.
+      if (typeof address === "string") {
+        const response = await axios.get(
+          `${this.ninsightURL}/address/utxo/${address}`,
+          _this.axiosOptions
+        )
+        return response.data
+
+        // Handle array of addresses.
+      } else if (Array.isArray(address)) {
+        const response = await axios.post(
+          `${this.ninsightURL}/address/utxo`,
+          {
+            addresses: address
+          },
+          _this.axiosOptions
+        )
+
+        return response.data
+      }
+
+      throw new Error(`Input address must be a string or array of strings.`)
     } catch (error) {
       if (error.response && error.response.data) throw error.response.data
       else throw error
diff --git a/test/integration/ninsight.js b/test/integration/ninsight.js
index 098e972..fd6825b 100644
--- a/test/integration/ninsight.js
+++ b/test/integration/ninsight.js
@@ -33,5 +33,25 @@ describe(`#Ninsight`, () => {
       assert.property(result.utxos[0], "height")
       assert.property(result.utxos[0], "confirmations")
     })
+
+    it(`should POST utxo details for an array of addresses`, async () => {
+      const addr = [
+        "bitcoincash:qp3sn6vlwz28ntmf3wmyra7jqttfx7z6zgtkygjhc7",
+        "bitcoincash:qz0us0z6ucpqt07jgpad0shgh7xmwxyr3ynlcsq0wr"
+      ]
+
+      const result = await bchjs.Ninsight.utxo(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.isArray(result)
+      assert.isArray(result[0].utxos)
+
+      assert.property(result[0], "utxos")
+      assert.property(result[0], "legacyAddress")
+      assert.property(result[0], "cashAddress")
+      assert.property(result[0], "slpAddress")
+      assert.property(result[0], "scriptPubKey")
+      assert.property(result[0], "asm")
+    })
   })
 })
diff --git a/test/integration/testnet/ninsight.js b/test/integration/testnet/ninsight.js
new file mode 100644
index 0000000..bc292ac
--- /dev/null
+++ b/test/integration/testnet/ninsight.js
@@ -0,0 +1,65 @@
+const chai = require("chai")
+const assert = chai.assert
+const sinon = require("sinon")
+
+const BCHJS = require("../../../src/bch-js")
+const bchjs = new BCHJS({ ninsightURL: "https://trest.bitcoin.com/v2" })
+
+describe(`#Ninsight`, () => {
+  let sandbox
+  beforeEach(() => (sandbox = sinon.createSandbox()))
+  afterEach(() => sandbox.restore())
+
+  describe(`#utxo`, () => {
+    it(`should GET utxos for a single address`, async () => {
+      const addr = "bchtest:qzjtnzcvzxx7s0na88yrg3zl28wwvfp97538sgrrmr"
+
+      const result = await bchjs.Ninsight.utxo(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result, "utxos")
+      assert.property(result, "legacyAddress")
+      assert.property(result, "cashAddress")
+      assert.property(result, "slpAddress")
+      assert.property(result, "scriptPubKey")
+      assert.property(result, "asm")
+
+      assert.isArray(result.utxos)
+
+      assert.property(result.utxos[0], "txid")
+      assert.property(result.utxos[0], "vout")
+      assert.property(result.utxos[0], "amount")
+      assert.property(result.utxos[0], "satoshis")
+      assert.property(result.utxos[0], "height")
+      assert.property(result.utxos[0], "confirmations")
+    })
+
+    it(`should POST utxo details for an array of addresses`, async () => {
+      const addr = [
+        "bchtest:qzjtnzcvzxx7s0na88yrg3zl28wwvfp97538sgrrmr",
+        "bchtest:qp6hgvevf4gzz6l7pgcte3gaaud9km0l459fa23dul"
+      ]
+
+      const result = await bchjs.Ninsight.utxo(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.isArray(result)
+      assert.isArray(result[0].utxos)
+
+      assert.property(result[0], "utxos")
+      assert.property(result[0], "legacyAddress")
+      assert.property(result[0], "cashAddress")
+      assert.property(result[0], "slpAddress")
+      assert.property(result[0], "scriptPubKey")
+      assert.property(result[0], "asm")
+
+      // assert.hasAnyKeys(result[0][0], [
+      //   "txid",
+      //   "vout",
+      //   "value",
+      //   "height",
+      //   "confirmations"
+      // ])
+    })
+  })
+})
diff --git a/test/unit/fixtures/ninsight-mock.js b/test/unit/fixtures/ninsight-mock.js
index aca70ae..cfc4f62 100644
--- a/test/unit/fixtures/ninsight-mock.js
+++ b/test/unit/fixtures/ninsight-mock.js
@@ -21,6 +21,9 @@ const utxo = {
     "OP_DUP OP_HASH160 2fe2c4c5ef359bb2fe1a849f891cecffbcfb4f77 OP_EQUALVERIFY OP_CHECKSIG"
 }
 
+const utxoPost = [utxo, utxo]
+
 module.exports = {
-  utxo
+  utxo,
+  utxoPost
 }
diff --git a/test/unit/ninsight.js b/test/unit/ninsight.js
index 9ac2b45..a62d560 100644
--- a/test/unit/ninsight.js
+++ b/test/unit/ninsight.js
@@ -22,7 +22,10 @@ describe(`#Ninsight`, () => {
         assert.equal(true, false, "Unexpected result!")
       } catch (err) {
         //console.log(`err: `, err)
-        assert.include(err.message, `address needs to be a string`)
+        assert.include(
+          err.message,
+          `Input address must be a string or array of strings.`
+        )
       }
     })
 
@@ -51,5 +54,28 @@ describe(`#Ninsight`, () => {
       assert.property(result.utxos[0], "height")
       assert.property(result.utxos[0], "confirmations")
     })
+
+    it(`should POST utxo details for an array of addresses`, async () => {
+      // Mock the network call.
+      sandbox.stub(axios, "post").resolves({ data: mockData.utxoPost })
+
+      const addr = [
+        "bitcoincash:qp3sn6vlwz28ntmf3wmyra7jqttfx7z6zgtkygjhc7",
+        "bitcoincash:qz0us0z6ucpqt07jgpad0shgh7xmwxyr3ynlcsq0wr"
+      ]
+
+      const result = await bchjs.Ninsight.utxo(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.isArray(result)
+      assert.isArray(result[0].utxos)
+
+      assert.property(result[0], "utxos")
+      assert.property(result[0], "legacyAddress")
+      assert.property(result[0], "cashAddress")
+      assert.property(result[0], "slpAddress")
+      assert.property(result[0], "scriptPubKey")
+      assert.property(result[0], "asm")
+    })
   })
 })