diff --git a/src/bch-js.js b/src/bch-js.js
index 649aba4..9fc7be1 100644
--- a/src/bch-js.js
+++ b/src/bch-js.js
@@ -38,6 +38,7 @@ const Ecash = require('./ecash')
 // Indexers
 const Ninsight = require('./ninsight')
 const Electrumx = require('./electrumx')
+const PsfSlpIndexer = require('./psf-slp-indexer')
 
 class BCHJS {
   constructor (config) {
@@ -120,6 +121,8 @@ class BCHJS {
 
     this.DSProof = new DSProof(libConfig)
     this.eCash = new Ecash()
+
+    this.PsfSlpIndexer = new PsfSlpIndexer(libConfig)
   }
 }
 
diff --git a/src/psf-slp-indexer.js b/src/psf-slp-indexer.js
new file mode 100644
index 0000000..7a614ac
--- /dev/null
+++ b/src/psf-slp-indexer.js
@@ -0,0 +1,292 @@
+/*
+  This library interacts with the PSF slp indexer REST API endpoints operated
+  by FullStack.cash
+*/
+// Public npm libraries
+const axios = require('axios')
+
+// let _this
+
+class PsfSlpIndexer {
+  constructor (config) {
+    this.restURL = config.restURL
+    this.apiToken = config.apiToken
+    this.authToken = config.authToken
+
+    if (this.authToken) {
+      // Add Basic Authentication token to the authorization header.
+      this.axiosOptions = {
+        headers: {
+          authorization: this.authToken
+        }
+      }
+    } else {
+      // Add JWT token to the authorization header.
+      this.axiosOptions = {
+        headers: {
+          authorization: `Token ${this.apiToken}`
+        }
+      }
+    }
+
+    // _this = this
+  }
+
+  /**
+   * @api PsfSlpIndexer.status()  status()
+   * @apiName Status
+   * @apiGroup PSF SLP
+   * @apiDescription Return status from psf slp indexer.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     let status = await bchjs.PsfSlpIndexer.status();
+   *     console.log(status);
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   *  {
+   *    "status": {
+   *      "startBlockHeight": 543376,
+   *      "syncedBlockHeight": 723249,
+   *      "chainBlockHeight": 722679
+   *     }
+   *  }
+   *
+   */
+  async status () {
+    try {
+      const response = await axios.get(
+        `${this.restURL}psf/slp/status`,
+        this.axiosOptions
+      )
+      return response.data
+    } catch (error) {
+      if (error.response && error.response.data) throw error.response.data
+      else throw error
+    }
+  }
+
+  /**
+   * @api PsfSlpIndexer.balance()  balance()
+   * @apiName SLP Balance
+   * @apiGroup PSF SLP
+   * @apiDescription Return slp balance for a single address.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     let balance = await bchjs.PsfSlpIndexer.balance('bitcoincash:qzmd5vxgh9m22m6fgvm57yd6kjnjl9qnwywsf3583n');
+   *     console.log(balance);
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   *  {
+   *    balance: {
+   *      utxos: [
+   *        {
+   *          txid: 'a24a6a4abf06fabd799ecea4f8fac6a9ff21e6a8dd6169a3c2ebc03665329db9',
+   *          vout: 1,
+   *          type: 'token',
+   *          qty: '1800',
+   *          tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *          address: 'bitcoincash:qrqy3kj7r822ps6628vwqq5k8hyjl6ey3y4eea2m4s'
+   *        }
+   *      ],
+   *      txs: [
+   *        {
+   *          txid: '078b2c48ed1db0d5d5996f2889b8d847a49200d0a781f6aa6752f740f312688f',
+   *          height: 717796
+   *        },
+   *        {
+   *          txid: 'a24a6a4abf06fabd799ecea4f8fac6a9ff21e6a8dd6169a3c2ebc03665329db9',
+   *          height: 717832
+   *        }
+   *      ],
+   *      balances: [
+   *        {
+   *          tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *          qty: '1800'
+   *        }
+   *      ]
+   *    }
+   *  }
+   *
+   */
+  async balance (address) {
+    try {
+      // Handle single address.
+      if (typeof address === 'string') {
+        const response = await axios.post(
+          `${this.restURL}psf/slp/address`,
+          { address },
+          this.axiosOptions
+        )
+        return response.data
+      }
+      throw new Error('Input address must be a string.')
+    } catch (error) {
+      if (error.response && error.response.data) throw error.response.data
+      else throw error
+    }
+  }
+
+  /**
+   * @api PsfSlpIndexer.tokenStats()  tokenStats()
+   * @apiName Token Stats
+   * @apiGroup PSF SLP
+   * @apiDescription Return list stats for a single slp token.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     let tokenStats = await bchjs.PsfSlpIndexer.tokenStats('a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2');
+   *     console.log(tokenStats);
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   * {
+   *   tokenData: {
+   *     type: 1,
+   *     ticker: 'TROUT',
+   *     name: "Trout's test token",
+   *     tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *     documentUri: 'troutsblog.com',
+   *     documentHash: '',
+   *     decimals: 2,
+   *     mintBatonIsActive: true,
+   *     tokensInCirculationBN: '100098953386',
+   *     tokensInCirculationStr: '100098953386',
+   *     blockCreated: 622414,
+   *     totalBurned: '1046614',
+   *     totalMinted: '100100000000'
+   *     txs: [
+   *       {
+   *         txid: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *         height: 622414,
+   *         type: 'GENESIS',
+   *         qty: '100000000000'
+   *       }
+   *     ]
+   *   }
+   * }
+   *
+   */
+
+  async tokenStats (tokenId) {
+    try {
+      // Handle single address.
+      if (typeof tokenId === 'string') {
+        const response = await axios.post(
+          `${this.restURL}psf/slp/token`,
+          { tokenId },
+          this.axiosOptions
+        )
+        return response.data
+      }
+      throw new Error('Input tokenId must be a string.')
+    } catch (error) {
+      if (error.response && error.response.data) throw error.response.data
+      else throw error
+    }
+  }
+
+  /**
+   * @api PsfSlpIndexer.tx()  tx()
+   * @apiName SLP Transaction Data
+   * @apiGroup PSF SLP
+   * @apiDescription Return slp transaction data.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     let txData = await bchjs.PsfSlpIndexer.tx('a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2');
+   *     console.log(txData);
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   * {
+   *   txData: {
+   *     txid: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *     hash: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *     version: 2,
+   *     size: 339,
+   *     locktime: 0,
+   *     vin: [
+   *       {
+   *         txid: '8370db30d94761ab9a11b71ecd22541151bf6125c8c613f0f6fab8ab794565a7',
+   *         vout: 0,
+   *         scriptSig: {
+   *           asm: '304402207e9631c53dfc8a9a793d1916469628c6b7c5780c01c2f676d51ef21b0ba4926f022069feb471ec869a49f8d108d0aaba04e7cd36e60a7500109d86537f55698930d4[ALL|FORKID] 02791b19a39165dbd83403d6df268d44fd621da30581b0b6e5cb15a7101ed58851',
+   *           hex: '47304402207e9631c53dfc8a9a793d1916469628c6b7c5780c01c2f676d51ef21b0ba4926f022069feb471ec869a49f8d108d0aaba04e7cd36e60a7500109d86537f55698930d4412102791b19a39165dbd83403d6df268d44fd621da30581b0b6e5cb15a7101ed58851'
+   *         },
+   *         sequence: 4294967295,
+   *         address: 'bitcoincash:qpvsg9vl9a5mlf37a7n3yce6pktdctn73qwgaqm3wq',
+   *         value: 0.00051303,
+   *         tokenQty: 0,
+   *         tokenQtyStr: '0',
+   *         tokenId: null
+   *       }
+   *     ],
+   *     vout: [
+   *       {
+   *         value: 0,
+   *         n: 0,
+   *         scriptPubKey: {
+   *           asm: 'OP_RETURN 5262419 1 47454e45534953 54524f5554 54726f75742773207465737420746f6b656e 74726f757473626c6f672e636f6d 0 2 2 000000174876e800',
+   *           hex: '6a04534c500001010747454e455349530554524f55541254726f75742773207465737420746f6b656e0e74726f757473626c6f672e636f6d4c000102010208000000174876e800',
+   *           type: 'nulldata'
+   *         },
+   *         tokenQtyStr: '0',
+   *         tokenQty: 0
+   *       }
+   *     ],
+   *     hex: '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',
+   *     blockhash: '0000000000000000009f65225a3e12e23a7ea057c869047e0f36563a1f410267',
+   *     confirmations: 97398,
+   *     time: 1581773131,
+   *     blocktime: 1581773131,
+   *     blockheight: 622414,
+   *     isSlpTx: true,
+   *     tokenTxType: 'GENESIS',
+   *     tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *     tokenType: 1,
+   *     tokenTicker: 'TROUT',
+   *     tokenName: "Trout's test token",
+   *     tokenDecimals: 2,
+   *     tokenUri: 'troutsblog.com',
+   *     tokenDocHash: '',
+   *     isValidSlp: true
+   *   }
+   * }
+   *
+   */
+  async tx (txid) {
+    try {
+      // Handle single address.
+      if (typeof txid === 'string') {
+        const response = await axios.post(
+          `${this.restURL}psf/slp/txid`,
+          { txid },
+          this.axiosOptions
+        )
+        return response.data
+      }
+      throw new Error('Input txid must be a string.')
+    } catch (error) {
+      if (error.response && error.response.data) throw error.response.data
+      else throw error
+    }
+  }
+}
+
+module.exports = PsfSlpIndexer
diff --git a/test/integration/chains/bchn/psf-slp-indexer.integration.js b/test/integration/chains/bchn/psf-slp-indexer.integration.js
new file mode 100644
index 0000000..979510d
--- /dev/null
+++ b/test/integration/chains/bchn/psf-slp-indexer.integration.js
@@ -0,0 +1,74 @@
+/*
+  Integration tests for the psf-slp-indexer.js library
+*/
+
+const assert = require('chai').assert
+
+const BCHJS = require('../../../../src/bch-js')
+let bchjs
+
+describe('#psf-slp-indexer', () => {
+  beforeEach(async () => {
+    // Introduce a delay so that the BVT doesn't trip the rate limits.
+    if (process.env.IS_USING_FREE_TIER) await sleep(3000)
+
+    bchjs = new BCHJS()
+  })
+
+  describe('#status', () => {
+    it('should return the status of the indexer.', async () => {
+      const result = await bchjs.PsfSlpIndexer.status()
+      // console.log('result: ', result)
+
+      assert.property(result.status, 'startBlockHeight')
+      assert.property(result.status, 'syncedBlockHeight')
+      assert.property(result.status, 'chainBlockHeight')
+    })
+  })
+
+  describe('#balance', () => {
+    it('should get balance data for an address.', async () => {
+      const addr = 'bitcoincash:qzmd5vxgh9m22m6fgvm57yd6kjnjl9qnwywsf3583n'
+
+      const result = await bchjs.PsfSlpIndexer.balance(addr)
+      // console.log('result: ', result)
+
+      assert.property(result.balance, 'utxos')
+      assert.property(result.balance, 'txs')
+      assert.property(result.balance, 'balances')
+    })
+  })
+
+  describe('#tokenStats', () => {
+    it('should get stats on a token', async () => {
+      const tokenId =
+        '38e97c5d7d3585a2cbf3f9580c82ca33985f9cb0845d4dcce220cb709f9538b0'
+
+      const result = await bchjs.PsfSlpIndexer.tokenStats(tokenId)
+      // console.log('result: ', result)
+
+      assert.property(result.tokenData, 'documentUri')
+      assert.property(result.tokenData, 'txs')
+      assert.property(result.tokenData, 'totalBurned')
+    })
+  })
+
+  describe('#tx', () => {
+    it('should get hydrated tx data', async () => {
+      const txid =
+        '83361c34cac2ea7f9ca287fca57a96cc0763719f0cdf4850f9696c1e68eb635c'
+
+      const result = await bchjs.PsfSlpIndexer.tx(txid)
+      // console.log('result: ', result)
+
+      assert.property(result.txData, 'vin')
+      assert.property(result.txData, 'vout')
+      assert.property(result.txData, 'isValidSlp')
+    })
+  })
+})
+
+// Promise-based sleep function
+function sleep (ms) {
+  return new Promise(resolve => setTimeout(resolve, ms))
+}
diff --git a/test/unit/fixtures/psf-slp-indexer-mock.js b/test/unit/fixtures/psf-slp-indexer-mock.js
new file mode 100644
index 0000000..c5541a0
--- /dev/null
+++ b/test/unit/fixtures/psf-slp-indexer-mock.js
@@ -0,0 +1,130 @@
+/*
+  Mocking data for unit tests for the PSF SLP INDEXER library.
+*/
+
+'use strict'
+
+const tokenStats = {
+  tokenData: {
+    type: 1,
+    ticker: 'TP03',
+    name: 'Test Plugin 03',
+    tokenId: '13cad617d523c8eb4ab11fff19c010e0e0a4ea4360b58e0c8c955a45a146a669',
+    documentUri: 'fullstack.cash',
+    documentHash: '',
+    decimals: 0,
+    mintBatonIsActive: false,
+    tokensInCirculationBN: '1',
+    tokensInCirculationStr: '1',
+    blockCreated: 722420,
+    totalBurned: '0',
+    totalMinted: '1',
+    txs: [
+      {
+        txid: '13cad617d523c8eb4ab11fff19c010e0e0a4ea4360b58e0c8c955a45a146a669',
+        height: 722420,
+        type: 'GENESIS',
+        qty: '1'
+      }
+    ]
+  }
+}
+
+const txData = {
+  txData: {
+    txid: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+    hash: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+    version: 2,
+    size: 339,
+    locktime: 0,
+    vin: [
+      {
+        txid: '8370db30d94761ab9a11b71ecd22541151bf6125c8c613f0f6fab8ab794565a7',
+        vout: 0,
+        scriptSig: {
+          asm: '304402207e9631c53dfc8a9a793d1916469628c6b7c5780c01c2f676d51ef21b0ba4926f022069feb471ec869a49f8d108d0aaba04e7cd36e60a7500109d86537f55698930d4[ALL|FORKID] 02791b19a39165dbd83403d6df268d44fd621da30581b0b6e5cb15a7101ed58851',
+          hex: '47304402207e9631c53dfc8a9a793d1916469628c6b7c5780c01c2f676d51ef21b0ba4926f022069feb471ec869a49f8d108d0aaba04e7cd36e60a7500109d86537f55698930d4412102791b19a39165dbd83403d6df268d44fd621da30581b0b6e5cb15a7101ed58851'
+        },
+        sequence: 4294967295,
+        address: 'bitcoincash:qpvsg9vl9a5mlf37a7n3yce6pktdctn73qwgaqm3wq',
+        value: 0.00051303,
+        tokenQty: 0,
+        tokenQtyStr: '0',
+        tokenId: null
+      }
+    ],
+    vout: [
+      {
+        value: 0,
+        n: 0,
+        scriptPubKey: {
+          asm: 'OP_RETURN 5262419 1 47454e45534953 54524f5554 54726f75742773207465737420746f6b656e 74726f757473626c6f672e636f6d 0 2 2 000000174876e800',
+          hex: '6a04534c500001010747454e455349530554524f55541254726f75742773207465737420746f6b656e0e74726f757473626c6f672e636f6d4c000102010208000000174876e800',
+          type: 'nulldata'
+        },
+        tokenQtyStr: '0',
+        tokenQty: 0
+      }
+    ],
+    hex: '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',
+    blockhash: '0000000000000000009f65225a3e12e23a7ea057c869047e0f36563a1f410267',
+    confirmations: 97398,
+    time: 1581773131,
+    blocktime: 1581773131,
+    blockheight: 622414,
+    isSlpTx: true,
+    tokenTxType: 'GENESIS',
+    tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+    tokenType: 1,
+    tokenTicker: 'TROUT',
+    tokenName: "Trout's test token",
+    tokenDecimals: 2,
+    tokenUri: 'troutsblog.com',
+    tokenDocHash: '',
+    isValidSlp: true
+  }
+}
+const balance = {
+  balance: {
+    utxos: [
+      {
+        txid: 'a24a6a4abf06fabd799ecea4f8fac6a9ff21e6a8dd6169a3c2ebc03665329db9',
+        vout: 1,
+        type: 'token',
+        qty: '1800',
+        tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+        address: 'bitcoincash:qrqy3kj7r822ps6628vwqq5k8hyjl6ey3y4eea2m4s'
+      }
+    ],
+    txs: [
+      {
+        txid: '078b2c48ed1db0d5d5996f2889b8d847a49200d0a781f6aa6752f740f312688f',
+        height: 717796
+      },
+      {
+        txid: 'a24a6a4abf06fabd799ecea4f8fac6a9ff21e6a8dd6169a3c2ebc03665329db9',
+        height: 717832
+      }
+    ],
+    balances: [
+      {
+        tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+        qty: '1800'
+      }
+    ]
+  }
+}
+
+const status = {
+  status: {
+    startBlockHeight: 543376,
+    syncedBlockHeight: 722860,
+    chainBlockHeight: 722679
+  }
+}
+module.exports = {
+  tokenStats,
+  txData,
+  balance,
+  status
+}
diff --git a/test/unit/psf-slp-indexer.js b/test/unit/psf-slp-indexer.js
new file mode 100644
index 0000000..f695cc7
--- /dev/null
+++ b/test/unit/psf-slp-indexer.js
@@ -0,0 +1,258 @@
+const chai = require('chai')
+const assert = chai.assert
+const axios = require('axios')
+const sinon = require('sinon')
+
+const BCHJS = require('../../src/bch-js')
+const bchjs = new BCHJS()
+
+const mockData = require('./fixtures/psf-slp-indexer-mock')
+
+describe('#PsfSlpIndexer', () => {
+  let sandbox
+  beforeEach(() => (sandbox = sinon.createSandbox()))
+  afterEach(() => sandbox.restore())
+
+  describe('#status', () => {
+    it('should GET status', async () => {
+      // Stub the network call.
+      sandbox.stub(axios, 'get').resolves({ data: mockData.status })
+
+      const result = await bchjs.PsfSlpIndexer.status()
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      assert.property(result, 'status')
+      assert.property(result.status, 'startBlockHeight')
+      assert.property(result.status, 'syncedBlockHeight')
+      assert.property(result.status, 'chainBlockHeight')
+    })
+
+    it('should handle axios error', async () => {
+      try {
+        // Stub the network call.
+        sandbox.stub(axios, 'get').throws(new Error('test error'))
+
+        await bchjs.PsfSlpIndexer.status()
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.include(err.message, 'test error')
+      }
+    })
+    it('should handle request error', async () => {
+      try {
+        // Stub the network call.
+        const testErr = new Error()
+        testErr.response = { data: { status: 422 } }
+        sandbox.stub(axios, 'get').throws(testErr)
+
+        await bchjs.PsfSlpIndexer.status()
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.equal(err.status, 422)
+      }
+    })
+  })
+
+  describe('#balance', () => {
+    it('should GET balance', async () => {
+      // Stub the network call.
+      sandbox.stub(axios, 'post').resolves({ data: mockData.balance })
+      const addr = 'bitcoincash:qzmd5vxgh9m22m6fgvm57yd6kjnjl9qnwywsf3583n'
+      const result = await bchjs.PsfSlpIndexer.balance(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      assert.property(result, 'balance')
+
+      assert.property(result.balance, 'utxos')
+      assert.property(result.balance, 'txs')
+      assert.property(result.balance, 'balances')
+      assert.isArray(result.balance.utxos)
+      assert.isArray(result.balance.txs)
+      assert.isArray(result.balance.balances)
+    })
+    it('should throw an error for improper input', async () => {
+      try {
+        const addr = 12345
+
+        await bchjs.PsfSlpIndexer.balance(addr)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        // console.log(`err: `, err)
+        assert.include(err.message, 'Input address must be a string.')
+      }
+    })
+    it('should handle axios error', async () => {
+      try {
+        // Stub the network call.
+        sandbox.stub(axios, 'post').throws(new Error('test error'))
+
+        const addr = 'bitcoincash:qzmd5vxgh9m22m6fgvm57yd6kjnjl9qnwywsf3583n'
+
+        await bchjs.PsfSlpIndexer.balance(addr)
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.include(err.message, 'test error')
+      }
+    })
+    it('should handle request error', async () => {
+      try {
+        // Stub the network call.
+        const testErr = new Error()
+        testErr.response = { data: { status: 422 } }
+        sandbox.stub(axios, 'post').throws(testErr)
+
+        const addr = 'bitcoincash:qzmd5vxgh9m22m6fgvm57yd6kjnjl9qnwywsf3583n'
+
+        await bchjs.PsfSlpIndexer.balance(addr)
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.equal(err.status, 422)
+      }
+    })
+  })
+
+  describe('#tokenStats', () => {
+    it('should GET token stats', async () => {
+      // Stub the network call.
+      sandbox.stub(axios, 'post').resolves({ data: mockData.tokenStats })
+
+      const tokenId =
+        'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+      const result = await bchjs.PsfSlpIndexer.tokenStats(tokenId)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      assert.property(result, 'tokenData')
+      assert.property(result.tokenData, 'type')
+      assert.property(result.tokenData, 'ticker')
+      assert.property(result.tokenData, 'name')
+      assert.property(result.tokenData, 'tokenId')
+      assert.property(result.tokenData, 'documentUri')
+      assert.property(result.tokenData, 'documentHash')
+      assert.property(result.tokenData, 'decimals')
+      assert.property(result.tokenData, 'mintBatonIsActive')
+      assert.property(result.tokenData, 'tokensInCirculationBN')
+      assert.property(result.tokenData, 'tokensInCirculationStr')
+      assert.property(result.tokenData, 'blockCreated')
+      assert.property(result.tokenData, 'totalBurned')
+      assert.property(result.tokenData, 'totalMinted')
+      assert.property(result.tokenData, 'txs')
+    })
+    it('should throw an error for improper input', async () => {
+      try {
+        const tokenId = 12345
+
+        await bchjs.PsfSlpIndexer.tokenStats(tokenId)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        // console.log(`err: `, err)
+        assert.include(err.message, 'Input tokenId must be a string.')
+      }
+    })
+    it('should handle axios error', async () => {
+      try {
+        // Stub the network call.
+        sandbox.stub(axios, 'post').throws(new Error('test error'))
+
+        const tokenId =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.tokenStats(tokenId)
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.include(err.message, 'test error')
+      }
+    })
+    it('should handle request error', async () => {
+      try {
+        // Stub the network call.
+        const testErr = new Error()
+        testErr.response = { data: { status: 422 } }
+        sandbox.stub(axios, 'post').throws(testErr)
+
+        const tokenId =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.tokenStats(tokenId)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.equal(err.status, 422)
+      }
+    })
+  })
+
+  describe('#tx', () => {
+    it('should GET transaction data', async () => {
+      // Stub the network call.
+      sandbox.stub(axios, 'post').resolves({ data: mockData.txData })
+
+      const txid =
+        'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+      const result = await bchjs.PsfSlpIndexer.tx(txid)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      assert.property(result, 'txData')
+      assert.property(result.txData, 'txid')
+      assert.property(result.txData, 'hash')
+      assert.property(result.txData, 'version')
+      assert.property(result.txData, 'size')
+      assert.property(result.txData, 'locktime')
+      assert.property(result.txData, 'vin')
+      assert.property(result.txData, 'vout')
+      assert.property(result.txData, 'hex')
+      assert.property(result.txData, 'blockhash')
+      assert.property(result.txData, 'confirmations')
+      assert.property(result.txData, 'time')
+      assert.property(result.txData, 'blocktime')
+      assert.property(result.txData, 'blockheight')
+      assert.property(result.txData, 'isSlpTx')
+      assert.property(result.txData, 'tokenTxType')
+      assert.property(result.txData, 'tokenId')
+      assert.property(result.txData, 'tokenType')
+      assert.property(result.txData, 'tokenTicker')
+      assert.property(result.txData, 'tokenName')
+      assert.property(result.txData, 'tokenDecimals')
+      assert.property(result.txData, 'tokenUri')
+      assert.property(result.txData, 'tokenDocHash')
+      assert.property(result.txData, 'isValidSlp')
+    })
+    it('should throw an error for improper input', async () => {
+      try {
+        const txid = 12345
+
+        await bchjs.PsfSlpIndexer.tx(txid)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        // console.log(`err: `, err)
+        assert.include(err.message, 'Input txid must be a string.')
+      }
+    })
+    it('should handle axios error', async () => {
+      try {
+        // Stub the network call.
+        sandbox.stub(axios, 'post').throws(new Error('test error'))
+
+        const txid =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.tx(txid)
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.include(err.message, 'test error')
+      }
+    })
+    it('should handle request error', async () => {
+      try {
+        // Stub the network call.
+        const testErr = new Error()
+        testErr.response = { data: { status: 422 } }
+        sandbox.stub(axios, 'post').throws(testErr)
+
+        const txid =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.tx(txid)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.equal(err.status, 422)
+      }
+    })
+  })
+})