diff --git a/clients/horizonclient/effect_request_test.go b/clients/horizonclient/effect_request_test.go
index 6afd89a9ce..a0819274a4 100644
--- a/clients/horizonclient/effect_request_test.go
+++ b/clients/horizonclient/effect_request_test.go
@@ -143,7 +143,7 @@ func TestNextEffectsPage(t *testing.T) {
 	efp, err := client.Effects(effectRequest)
 
 	if assert.NoError(t, err) {
-		assert.Equal(t, len(efp.Embedded.Records), 2)
+		assert.Len(t, efp.Embedded.Records, 2)
 	}
 
 	hmock.On(
@@ -153,7 +153,88 @@ func TestNextEffectsPage(t *testing.T) {
 
 	nextPage, err := client.NextEffectsPage(efp)
 	if assert.NoError(t, err) {
-		assert.Equal(t, len(nextPage.Embedded.Records), 0)
+		assert.Len(t, nextPage.Embedded.Records, 0)
+	}
+}
+
+func TestSequenceBumpedNewSeq(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+	effectRequest := EffectRequest{ForAccount: "GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD"}
+	testCases := []struct {
+		desc    string
+		payload string
+	}{
+		{
+			desc:    "new_seq as a string",
+			payload: sequenceBumpedAsStringPage,
+		},
+		{
+			desc:    "new_seq as a number",
+			payload: sequenceBumpedAsNumberPage,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			hmock.On(
+				"GET",
+				"https://localhost/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects",
+			).ReturnString(200, tc.payload)
+
+			efp, err := client.Effects(effectRequest)
+
+			if assert.NoError(t, err) {
+				assert.Len(t, efp.Embedded.Records, 1)
+			}
+
+			effect, ok := efp.Embedded.Records[0].(effects.SequenceBumped)
+			assert.True(t, ok)
+			assert.Equal(t, int64(300000000000), effect.NewSeq)
+
+		})
+	}
+}
+
+func TestTradeEffectOfferID(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+	effectRequest := EffectRequest{ForAccount: "GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD"}
+	testCases := []struct {
+		desc    string
+		payload string
+	}{
+		{
+			desc:    "offer_id as a number",
+			payload: tradeEffectNumberOfferID,
+		},
+		{
+			desc:    "offer_id as a string",
+			payload: tradeEffectStringOfferID,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			hmock.On(
+				"GET",
+				"https://localhost/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects",
+			).ReturnString(200, tc.payload)
+
+			efp, err := client.Effects(effectRequest)
+
+			if assert.NoError(t, err) {
+				assert.Len(t, efp.Embedded.Records, 1)
+			}
+
+			effect, ok := efp.Embedded.Records[0].(effects.Trade)
+			assert.True(t, ok)
+			assert.Equal(t, int64(127538672), effect.OfferID)
+		})
 	}
 }
 
@@ -215,11 +296,159 @@ var firstEffectsPage = `{
         "weight": 1,
         "public_key": "GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD",
         "key": ""
-      }
+	  }
     ]
   }
 }`
 
+var sequenceBumpedAsNumberPage = `{
+	"_links": {
+	  "self": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=&limit=10&order=asc"
+	  },
+	  "next": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=1557363731492865-3&limit=10&order=asc"
+	  },
+	  "prev": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=1557363731492865-1&limit=10&order=desc"
+	  }
+	},
+	"_embedded": {
+	  "records": [
+		{
+		  "_links": {
+			"operation": {
+			  "href": "https://horizon-testnet.stellar.org/operations/249108107265"
+			},
+			"succeeds": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=desc\u0026cursor=249108107265-1"
+			},
+			"precedes": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=asc\u0026cursor=249108107265-1"
+			}
+		  },
+		  "id": "0000000249108107265-0000000001",
+		  "paging_token": "249108107265-1",
+		  "account": "GCQZP3IU7XU6EJ63JZXKCQOYT2RNXN3HB5CNHENNUEUHSMA4VUJJJSEN",
+		  "type": "sequence_bumped",
+		  "type_i": 43,
+		  "created_at": "2019-06-03T16:36:24Z",
+		  "new_seq": 300000000000
+		}
+	  ]
+	}
+  }`
+
+var sequenceBumpedAsStringPage = `{
+	"_links": {
+	  "self": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=&limit=10&order=asc"
+	  },
+	  "next": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=1557363731492865-3&limit=10&order=asc"
+	  },
+	  "prev": {
+		"href": "https://horizon-testnet.stellar.org/accounts/GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD/effects?cursor=1557363731492865-1&limit=10&order=desc"
+	  }
+	},
+	"_embedded": {
+	  "records": [
+		{
+		  "_links": {
+			"operation": {
+			  "href": "https://horizon-testnet.stellar.org/operations/249108107265"
+			},
+			"succeeds": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=desc\u0026cursor=249108107265-1"
+			},
+			"precedes": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=asc\u0026cursor=249108107265-1"
+			}
+		  },
+		  "id": "0000000249108107265-0000000001",
+		  "paging_token": "249108107265-1",
+		  "account": "GCQZP3IU7XU6EJ63JZXKCQOYT2RNXN3HB5CNHENNUEUHSMA4VUJJJSEN",
+		  "type": "sequence_bumped",
+		  "type_i": 43,
+		  "created_at": "2019-06-03T16:36:24Z",
+		  "new_seq": "300000000000"
+		}
+	  ]
+	}
+  }`
+
+var tradeEffectNumberOfferID = `
+{
+	"_embedded": {
+	  "records": [
+		{
+		  "_links": {
+			"operation": {
+			  "href": "https://horizon-testnet.stellar.org/operations/224209713045979100"
+			},
+			"succeeds": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=desc&cursor=224209713045979100-3"
+			},
+			"precedes": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=asc&cursor=224209713045979100-3"
+			}
+		  },
+		  "id": "2214209713045979100-0000000003",
+		  "paging_token": "224209713045979100-3",
+		  "account": "GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD",
+		  "type": "trade",
+		  "type_i": 33,
+		  "created_at": "2019-11-01T23:05:58Z",
+		  "seller": "GDUKMGUGDZQK6YHYA5Z6AY2G4XDSZPSZ3SW5UN3ARVMO6QSRDWP5YLEX",
+		  "offer_id": 127538672,
+		  "sold_amount": "14.5984123",
+		  "sold_asset_type": "native",
+		  "bought_amount": "1.0000000",
+		  "bought_asset_type": "credit_alphanum4",
+		  "bought_asset_code": "USD",
+		  "bought_asset_issuer": "GDUKMGUGDZQK6YHYA5Z6AY2G4XDSZPSZ3SW5UN3ARVMO6QSRDWP5YLEX"
+		}
+	  ]
+	}
+}
+`
+
+var tradeEffectStringOfferID = `
+{
+	"_embedded": {
+	  "records": [
+		{
+		  "_links": {
+			"operation": {
+			  "href": "https://horizon-testnet.stellar.org/operations/224209713045979100"
+			},
+			"succeeds": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=desc&cursor=224209713045979100-3"
+			},
+			"precedes": {
+			  "href": "https://horizon-testnet.stellar.org/effects?order=asc&cursor=224209713045979100-3"
+			}
+		  },
+		  "id": "2214209713045979100-0000000003",
+		  "paging_token": "224209713045979100-3",
+		  "account": "GCDIZFWLOTBWHTPODXCBH6XNXPFMSQFRVIDRP3JLEKQZN66G7NF3ANOD",
+		  "type": "trade",
+		  "type_i": 33,
+		  "created_at": "2019-11-01T23:05:58Z",
+		  "seller": "GDUKMGUGDZQK6YHYA5Z6AY2G4XDSZPSZ3SW5UN3ARVMO6QSRDWP5YLEX",
+		  "offer_id": "127538672",
+		  "sold_amount": "14.5984123",
+		  "sold_asset_type": "native",
+		  "bought_amount": "1.0000000",
+		  "bought_asset_type": "credit_alphanum4",
+		  "bought_asset_code": "USD",
+		  "bought_asset_issuer": "GDUKMGUGDZQK6YHYA5Z6AY2G4XDSZPSZ3SW5UN3ARVMO6QSRDWP5YLEX"
+		}
+	  ]
+	}
+}
+`
+
 var emptyEffectsPage = `{
   "_links": {
     "self": {
diff --git a/clients/horizonclient/offer_request_test.go b/clients/horizonclient/offer_request_test.go
index 4a150fb953..cc01f05aef 100644
--- a/clients/horizonclient/offer_request_test.go
+++ b/clients/horizonclient/offer_request_test.go
@@ -47,6 +47,8 @@ func TestNextOffersPage(t *testing.T) {
 		assert.Equal(t, len(offers.Embedded.Records), 2)
 	}
 
+	assert.Equal(t, int64(2946580), offers.Embedded.Records[0].ID)
+
 	hmock.On(
 		"GET",
 		"https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946581&limit=2&order=asc",
@@ -105,8 +107,47 @@ func TestOfferRequestStreamOffers(t *testing.T) {
 	}
 }
 
+func TestStringOfferID(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+
+	offerRequest := OfferRequest{ForAccount: "GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG", Limit: 1}
+
+	hmock.On(
+		"GET",
+		"https://localhost/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?limit=1",
+	).ReturnString(200, stringOffersPage)
+
+	offers, err := client.Offers(offerRequest)
+
+	if assert.NoError(t, err) {
+		assert.Equal(t, len(offers.Embedded.Records), 1)
+	}
+
+	assert.Equal(t, int64(2946580), offers.Embedded.Records[0].ID)
+}
+
 var offerStreamResponse = `data: {"_links":{"self":{"href":"https://horizon-testnet.stellar.org/offers/5269100"},"offer_maker":{"href":"https://horizon-testnet.stellar.org/accounts/GAQHWQYBBW272OOXNQMMLCA5WY2XAZPODGB7Q3S5OKKIXVESKO55ZQ7C"}},"id":5269100,"paging_token":"5269100","seller":"GAQHWQYBBW272OOXNQMMLCA5WY2XAZPODGB7Q3S5OKKIXVESKO55ZQ7C","selling":{"asset_type":"credit_alphanum4","asset_code":"DSQ","asset_issuer":"GBDQPTQJDATT7Z7EO4COS4IMYXH44RDLLI6N6WIL5BZABGMUOVMLWMQF"},"buying":{"asset_type":"credit_alphanum4","asset_code":"XCS6","asset_issuer":"GBH2V47NOZRC56QAYCPV5JUBG5NVFJQF5AQTUNFNWNDHSWWTKH2MWR2L"},"amount":"20.4266087","price_r":{"n":24819,"d":10000000},"price":"0.0024819","last_modified_ledger":674449,"last_modified_time":"2019-04-08T11:56:41Z"}
 `
+var emptyOffersPage = `{
+  "_links": {
+    "self": {
+      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946581&limit=2&order=asc"
+    },
+    "next": {
+      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946583&limit=2&order=asc"
+    },
+    "prev": {
+      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946582&limit=2&order=desc"
+    }
+  },
+  "_embedded": {
+    "records": []
+  }
+}`
 
 var firstOffersPage = `{
   "_links": {
@@ -188,19 +229,40 @@ var firstOffersPage = `{
   }
 }`
 
-var emptyOffersPage = `{
-  "_links": {
-    "self": {
-      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946581&limit=2&order=asc"
-    },
-    "next": {
-      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946583&limit=2&order=asc"
-    },
-    "prev": {
-      "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG/offers?cursor=2946582&limit=2&order=desc"
-    }
-  },
+var stringOffersPage = `{
   "_embedded": {
-    "records": []
+    "records": [
+      {
+        "_links": {
+          "self": {
+            "href": "https://horizon-testnet.stellar.org/offers/2946580"
+          },
+          "offer_maker": {
+            "href": "https://horizon-testnet.stellar.org/accounts/GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG"
+          }
+        },
+        "id": "2946580",
+        "paging_token": "2946580",
+        "seller": "GBZ5OD56VRTRQKMNADD6VUZUG3FCILMAMYQY5ZSC3AW3GBXNEPIK76IG",
+        "selling": {
+          "asset_type": "credit_alphanum4",
+          "asset_code": "HT",
+          "asset_issuer": "GCNSGHUCG5VMGLT5RIYYZSO7VQULQKAJ62QA33DBC5PPBSO57LFWVV6P"
+        },
+        "buying": {
+          "asset_type": "credit_alphanum4",
+          "asset_code": "BTC",
+          "asset_issuer": "GCNSGHUCG5VMGLT5RIYYZSO7VQULQKAJ62QA33DBC5PPBSO57LFWVV6P"
+        },
+        "amount": "33.7252478",
+        "price_r": {
+          "n": 15477,
+          "d": 43975000
+        },
+        "price": "0.0003519",
+        "last_modified_ledger": 363492,
+        "last_modified_time": "2019-05-16T08:35:22Z"
+      }
+    ]
   }
 }`
diff --git a/clients/horizonclient/operation_request_test.go b/clients/horizonclient/operation_request_test.go
index 925bbfc705..cec5c284b9 100644
--- a/clients/horizonclient/operation_request_test.go
+++ b/clients/horizonclient/operation_request_test.go
@@ -175,6 +175,50 @@ func TestOperationRequestStreamOperations(t *testing.T) {
 	}
 }
 
+func TestManageSellManageBuyOfferOfferID(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+
+	testCases := []struct {
+		desc    string
+		payload string
+	}{
+		{
+			desc:    "offer_id as a number",
+			payload: numberManageSellBuyOfferOperations,
+		},
+		{
+			desc:    "offer_id as a string",
+			payload: stringManageSellBuyOfferOperations,
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			hmock.On(
+				"GET",
+				"https://localhost/operations",
+			).ReturnString(200, tc.payload)
+			operationRequest := OperationRequest{}
+			ops, err := client.Operations(operationRequest)
+
+			if assert.NoError(t, err) {
+				assert.Equal(t, len(ops.Embedded.Records), 2)
+			}
+
+			mso, ok := ops.Embedded.Records[0].(operations.ManageSellOffer)
+			assert.True(t, ok)
+			assert.Equal(t, int64(127538671), mso.OfferID)
+
+			mbo, ok := ops.Embedded.Records[1].(operations.ManageBuyOffer)
+			assert.True(t, ok)
+			assert.Equal(t, int64(127538672), mbo.OfferID)
+		})
+	}
+}
+
 var operationStreamResponse = `data: {"_links":{"self":{"href":"https://horizon-testnet.stellar.org/operations/4934917427201"},"transaction":{"href":"https://horizon-testnet.stellar.org/transactions/1c1449106a54cccd8a2ec2094815ad9db30ae54c69c3309dd08d13fdb8c749de"},"effects":{"href":"https://horizon-testnet.stellar.org/operations/4934917427201/effects"},"succeeds":{"href":"https://horizon-testnet.stellar.org/effects?order=desc\u0026cursor=4934917427201"},"precedes":{"href":"https://horizon-testnet.stellar.org/effects?order=asc\u0026cursor=4934917427201"}},"id":"4934917427201","paging_token":"4934917427201","transaction_successful":true,"source_account":"GAIH3ULLFQ4DGSECF2AR555KZ4KNDGEKN4AFI4SU2M7B43MGK3QJZNSR","type":"create_account","type_i":0,"created_at":"2019-02-27T11:32:39Z","transaction_hash":"1c1449106a54cccd8a2ec2094815ad9db30ae54c69c3309dd08d13fdb8c749de","starting_balance":"10000.0000000","funder":"GAIH3ULLFQ4DGSECF2AR555KZ4KNDGEKN4AFI4SU2M7B43MGK3QJZNSR","account":"GDBLBBDIUULY3HGIKXNK6WVBISY7DCNCDA45EL7NTXWX5R4UZ26HGMGS"}
 `
 
@@ -192,7 +236,7 @@ var firstOperationsPage = `{
   },
   "_embedded": {
     "records": [
-      {
+      {	
         "_links": {
           "self": {
             "href": "https://horizon-testnet.stellar.org/operations/661424967681"
@@ -272,3 +316,191 @@ var emptyOperationsPage = `{
     "records": []
   }
 }`
+
+var numberManageSellBuyOfferOperations = `{
+	"_links": {
+	  "self": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967682&limit=2&order=asc"
+	  },
+	  "next": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967684&limit=2&order=asc"
+	  },
+	  "prev": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967683&limit=2&order=desc"
+	  }
+	},
+	"_embedded": {
+	  "records": [
+		{
+			"_links": {
+			  "self": {
+				"href": "https://horizon-testnet.stellar.org/operations/972702718365697"
+			  },
+			  "transaction": {
+				"href": "https://horizon-testnet.stellar.org/transactions/cfe9eba317025dd0cff111967a3709358153e9ee97472e67c17e42837dd50a52"
+			  },
+			  "effects": {
+				"href": "https://horizon-testnet.stellar.org/operations/972702718365697/effects"
+			  },
+			  "succeeds": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=desc\u0026cursor=972702718365697"
+			  },
+			  "precedes": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=asc\u0026cursor=972702718365697"
+			  }
+			},
+			"id": "972702718365697",
+			"paging_token": "972702718365697",
+			"transaction_successful": true,
+			"source_account": "GBPPEHGF322UNA62WHRHBCUBCVOIT3SLUY7U7XQEEISZ5B2JLZ3AYTDC",
+			"type": "manage_offer",
+			"type_i": 3,
+			"created_at": "2019-11-13T16:46:36Z",
+			"transaction_hash": "cfe9eba317025dd0cff111967a3709358153e9ee97472e67c17e42837dd50a52",
+			"amount": "1000.0000000",
+			"price": "0.1312531",
+			"price_r": {
+			  "n": 265,
+			  "d": 2019
+			},
+			"buying_asset_type": "credit_alphanum4",
+			"buying_asset_code": "BAT",
+			"buying_asset_issuer": "GBBJMSXCTLXVOYRL7SJ5ABLJ3GGCUFQXCFIXYUOHZZUDAZJKLXCO32AU",
+			"selling_asset_type": "native",
+			"offer_id": 127538671
+		  },
+		  {
+			"_links": {
+			  "self": {
+				"href": "https://horizon-testnet.stellar.org/operations/158041911595009"
+			  },
+			  "transaction": {
+				"href": "https://horizon-testnet.stellar.org/transactions/8a4db87e4749130ba32924943c2f219de497fe2d4f3e074187c5d2159ca2d134"
+			  },
+			  "effects": {
+				"href": "https://horizon-testnet.stellar.org/operations/158041911595009/effects"
+			  },
+			  "succeeds": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=desc&cursor=158041911595009"
+			  },
+			  "precedes": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=asc&cursor=158041911595009"
+			  }
+			},
+			"id": "158041911595009",
+			"paging_token": "158041911595009",
+			"transaction_successful": true,
+			"source_account": "GBBXM7GVMXZMQWDEKSWGEW6GT6XMPBLEVEPLYWIQF3SRS43AIJVU3QES",
+			"type": "manage_buy_offer",
+			"type_i": 12,
+			"created_at": "2019-11-01T17:06:47Z",
+			"transaction_hash": "8a4db87e4749130ba32924943c2f219de497fe2d4f3e074187c5d2159ca2d134",
+			"amount": "1.0000000",
+			"price": "0.5000000",
+			"price_r": {
+			  "n": 1,
+			  "d": 2
+			},
+			"buying_asset_type": "credit_alphanum12",
+			"buying_asset_code": "MosaiRMBA",
+			"buying_asset_issuer": "GBBWA24VLGPVMMFMF2OJHW3QHFVSILK2UJSNTORRC6QHK6EPTUADAJFA",
+			"selling_asset_type": "native",
+			"offer_id": 127538672
+		  }
+	  ]
+	}
+  }`
+
+var stringManageSellBuyOfferOperations = `{
+	"_links": {
+	  "self": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967682&limit=2&order=asc"
+	  },
+	  "next": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967684&limit=2&order=asc"
+	  },
+	  "prev": {
+		"href": "https://horizon-testnet.stellar.org/operations?cursor=661424967683&limit=2&order=desc"
+	  }
+	},
+	"_embedded": {
+	  "records": [
+		{
+			"_links": {
+			  "self": {
+				"href": "https://horizon-testnet.stellar.org/operations/972702718365697"
+			  },
+			  "transaction": {
+				"href": "https://horizon-testnet.stellar.org/transactions/cfe9eba317025dd0cff111967a3709358153e9ee97472e67c17e42837dd50a52"
+			  },
+			  "effects": {
+				"href": "https://horizon-testnet.stellar.org/operations/972702718365697/effects"
+			  },
+			  "succeeds": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=desc\u0026cursor=972702718365697"
+			  },
+			  "precedes": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=asc\u0026cursor=972702718365697"
+			  }
+			},
+			"id": "972702718365697",
+			"paging_token": "972702718365697",
+			"transaction_successful": true,
+			"source_account": "GBPPEHGF322UNA62WHRHBCUBCVOIT3SLUY7U7XQEEISZ5B2JLZ3AYTDC",
+			"type": "manage_offer",
+			"type_i": 3,
+			"created_at": "2019-11-13T16:46:36Z",
+			"transaction_hash": "cfe9eba317025dd0cff111967a3709358153e9ee97472e67c17e42837dd50a52",
+			"amount": "1000.0000000",
+			"price": "0.1312531",
+			"price_r": {
+			  "n": 265,
+			  "d": 2019
+			},
+			"buying_asset_type": "credit_alphanum4",
+			"buying_asset_code": "BAT",
+			"buying_asset_issuer": "GBBJMSXCTLXVOYRL7SJ5ABLJ3GGCUFQXCFIXYUOHZZUDAZJKLXCO32AU",
+			"selling_asset_type": "native",
+			"offer_id": "127538671"
+		  },
+		  {
+			"_links": {
+			  "self": {
+				"href": "https://horizon-testnet.stellar.org/operations/158041911595009"
+			  },
+			  "transaction": {
+				"href": "https://horizon-testnet.stellar.org/transactions/8a4db87e4749130ba32924943c2f219de497fe2d4f3e074187c5d2159ca2d134"
+			  },
+			  "effects": {
+				"href": "https://horizon-testnet.stellar.org/operations/158041911595009/effects"
+			  },
+			  "succeeds": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=desc&cursor=158041911595009"
+			  },
+			  "precedes": {
+				"href": "https://horizon-testnet.stellar.org/effects?order=asc&cursor=158041911595009"
+			  }
+			},
+			"id": "158041911595009",
+			"paging_token": "158041911595009",
+			"transaction_successful": true,
+			"source_account": "GBBXM7GVMXZMQWDEKSWGEW6GT6XMPBLEVEPLYWIQF3SRS43AIJVU3QES",
+			"type": "manage_buy_offer",
+			"type_i": 12,
+			"created_at": "2019-11-01T17:06:47Z",
+			"transaction_hash": "8a4db87e4749130ba32924943c2f219de497fe2d4f3e074187c5d2159ca2d134",
+			"amount": "1.0000000",
+			"price": "0.5000000",
+			"price_r": {
+			  "n": 1,
+			  "d": 2
+			},
+			"buying_asset_type": "credit_alphanum12",
+			"buying_asset_code": "MosaiRMBA",
+			"buying_asset_issuer": "GBBWA24VLGPVMMFMF2OJHW3QHFVSILK2UJSNTORRC6QHK6EPTUADAJFA",
+			"selling_asset_type": "native",
+			"offer_id": "127538672"
+		  }
+	  ]
+	}
+  }`
diff --git a/clients/horizonclient/trade_aggregation_request_test.go b/clients/horizonclient/trade_aggregation_request_test.go
index a2dcd9a21f..4d614412d3 100644
--- a/clients/horizonclient/trade_aggregation_request_test.go
+++ b/clients/horizonclient/trade_aggregation_request_test.go
@@ -119,9 +119,12 @@ func TestNextTradeAggregationsPage(t *testing.T) {
 	tradeAggs, err := client.TradeAggregations(taRequest)
 
 	if assert.NoError(t, err) {
-		assert.Equal(t, len(tradeAggs.Embedded.Records), 2)
+		assert.Len(t, tradeAggs.Embedded.Records, 2)
 	}
 
+	assert.Equal(t, int64(1565026860000), tradeAggs.Embedded.Records[0].Timestamp)
+	assert.Equal(t, int64(3), tradeAggs.Embedded.Records[0].TradeCount)
+
 	hmock.On(
 		"GET",
 		"https://horizon-testnet.stellar.org/trade_aggregations?base_asset_code=USD&base_asset_issuer=GDLEUZYDSFMWA5ZLQIOCYS7DMLYDKFS2KWJ5M3RQ3P3WS4L75ZTWKELP&base_asset_type=credit_alphanum4&counter_asset_code=BTC&counter_asset_issuer=GDLEUZYDSFMWA5ZLQIOCYS7DMLYDKFS2KWJ5M3RQ3P3WS4L75ZTWKELP&counter_asset_type=credit_alphanum4&limit=2&resolution=60000&start_time=0",
@@ -172,6 +175,38 @@ func TestPrevTradeAggregationsPage(t *testing.T) {
 	}
 }
 
+func TestTradeAggregationsPageStringPayload(t *testing.T) {
+	hmock := httptest.NewClient()
+	client := &Client{
+		HorizonURL: "https://localhost/",
+		HTTP:       hmock,
+	}
+
+	taRequest := TradeAggregationRequest{
+		StartTime:          testTime,
+		EndTime:            testTime,
+		Resolution:         DayResolution,
+		BaseAssetType:      AssetTypeNative,
+		CounterAssetType:   AssetType4,
+		CounterAssetCode:   "SLT",
+		CounterAssetIssuer: "GCKA6K5PCQ6PNF5RQBF7PQDJWRHO6UOGFMRLK3DYHDOI244V47XKQ4GP",
+		Order:              OrderDesc,
+	}
+
+	hmock.On(
+		"GET",
+		"https://localhost/trade_aggregations?base_asset_type=native&counter_asset_code=SLT&counter_asset_issuer=GCKA6K5PCQ6PNF5RQBF7PQDJWRHO6UOGFMRLK3DYHDOI244V47XKQ4GP&counter_asset_type=credit_alphanum4&end_time=1517521726000&offset=0&order=desc&resolution=86400000&start_time=1517521726000",
+	).ReturnString(200, stringTradeAggsPage)
+	tradeAggs, err := client.TradeAggregations(taRequest)
+
+	if assert.NoError(t, err) {
+		assert.Len(t, tradeAggs.Embedded.Records, 1)
+	}
+
+	assert.Equal(t, int64(1565026860000), tradeAggs.Embedded.Records[0].Timestamp)
+	assert.Equal(t, int64(3), tradeAggs.Embedded.Records[0].TradeCount)
+}
+
 var tradeAggsResponse = `{
   "_links": {
     "self": {
@@ -329,3 +364,37 @@ var emptyTradeAggsPage = `{
     "records": []
   }
 }`
+
+var stringTradeAggsPage = `{
+  "_embedded": {
+    "records": [
+      {
+        "timestamp": "1565026860000",
+        "trade_count": "3",
+        "base_volume": "23781.2128418",
+        "counter_volume": "2.0000000",
+        "avg": "0.0000841",
+        "high": "0.0000841",
+        "high_r": {
+          "N": 841,
+          "D": 10000000
+        },
+        "low": "0.0000841",
+        "low_r": {
+          "N": 841,
+          "D": 10000000
+        },
+        "open": "0.0000841",
+        "open_r": {
+          "N": 841,
+          "D": 10000000
+        },
+        "close": "0.0000841",
+        "close_r": {
+          "N": 841,
+          "D": 10000000
+        }
+      }
+    ]
+  }
+}`
diff --git a/protocols/horizon/base/main.go b/protocols/horizon/base/main.go
index e52deb76cc..d0ee50c479 100644
--- a/protocols/horizon/base/main.go
+++ b/protocols/horizon/base/main.go
@@ -1,5 +1,7 @@
 package base
 
+import "encoding/json"
+
 type Price struct {
 	N int32 `json:"n"`
 	D int32 `json:"d"`
@@ -21,3 +23,22 @@ type Asset struct {
 type Rehydratable interface {
 	Rehydrate() error
 }
+
+// ExtractOfferID extracts offer_id from a JSON payload
+// Action needed in release: horizon-v0.25.0: remove
+func ExtractOfferID(data []byte) (int64, error) {
+	var temp struct {
+		OfferID json.Number `json:"offer_id"`
+	}
+
+	if err := json.Unmarshal(data, &temp); err != nil {
+		return 0, err
+	}
+
+	offerID, err := temp.OfferID.Int64()
+	if err != nil {
+		return 0, err
+	}
+
+	return offerID, nil
+}
diff --git a/protocols/horizon/effects/main.go b/protocols/horizon/effects/main.go
index 2f45418cc5..030f6344d4 100644
--- a/protocols/horizon/effects/main.go
+++ b/protocols/horizon/effects/main.go
@@ -198,9 +198,35 @@ type AccountFlagsUpdated struct {
 
 type SequenceBumped struct {
 	Base
+	// Action needed in release: horizon-v0.25.0: make new_seq as string
 	NewSeq int64 `json:"new_seq"`
 }
 
+// UnmarshalJSON is the custom unmarshal method for SequenceBumped. It allows
+// parsing of new_seq as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (effect *SequenceBumped) UnmarshalJSON(data []byte) error {
+	var temp struct {
+		NewSeq json.Number `json:"new_seq"`
+	}
+
+	if err := json.Unmarshal(data, &effect.Base); err != nil {
+		return err
+	}
+
+	if err := json.Unmarshal(data, &temp); err != nil {
+		return err
+	}
+
+	newSeq, err := temp.NewSeq.Int64()
+	if err != nil {
+		return err
+	}
+	effect.NewSeq = newSeq
+
+	return nil
+}
+
 type SignerCreated struct {
 	Base
 	Weight    int32  `json:"weight"`
@@ -254,11 +280,10 @@ type TrustlineDeauthorized struct {
 	AssetCode string `json:"asset_code,omitempty"`
 }
 
-type Trade struct {
-	Base
-	Seller string `json:"seller"`
-	// Action needed in release: horizon-v0.23.0
-	OfferID           int64  `json:"offer_id"`
+// Action needed in release: horizon-v0.25.0: move back to Trade, remove
+// embedded struct
+type tradeBase struct {
+	Seller            string `json:"seller"`
 	SoldAmount        string `json:"sold_amount"`
 	SoldAssetType     string `json:"sold_asset_type"`
 	SoldAssetCode     string `json:"sold_asset_code,omitempty"`
@@ -269,6 +294,37 @@ type Trade struct {
 	BoughtAssetIssuer string `json:"bought_asset_issuer,omitempty"`
 }
 
+type Trade struct {
+	Base
+	tradeBase
+	// Action needed in release: horizon-v0.25.0: Make offer_id a string
+	OfferID int64 `json:"offer_id"`
+}
+
+// UnmarshalJSON is the custom unmarshal method for Trade. It allows
+// parsing of offer_id as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (effect *Trade) UnmarshalJSON(data []byte) error {
+	var tradeWithoutOfferID struct {
+		Base
+		tradeBase
+	}
+	if err := json.Unmarshal(data, &tradeWithoutOfferID); err != nil {
+		return err
+	}
+
+	offerID, err := base.ExtractOfferID(data)
+	if err != nil {
+		return err
+	}
+
+	effect.Base = tradeWithoutOfferID.Base
+	effect.tradeBase = tradeWithoutOfferID.tradeBase
+	effect.OfferID = offerID
+
+	return nil
+}
+
 // Effect contains methods that are implemented by all effect types.
 type Effect interface {
 	PagingToken() string
diff --git a/protocols/horizon/main.go b/protocols/horizon/main.go
index 687fffb5e3..7de04e0627 100644
--- a/protocols/horizon/main.go
+++ b/protocols/horizon/main.go
@@ -217,15 +217,13 @@ func (l Ledger) PagingToken() string {
 	return l.PT
 }
 
-// Offer is the display form of an offer to trade currency.
-type Offer struct {
+// Action needed in release: horizon-v0.25.0: Move back to Offer, remove embedded struct
+type offerBase struct {
 	Links struct {
 		Self       hal.Link `json:"self"`
 		OfferMaker hal.Link `json:"offer_maker"`
 	} `json:"_links"`
 
-	// Action needed in release: horizon-v0.23.0
-	ID                 int64      `json:"id"`
 	PT                 string     `json:"paging_token"`
 	Seller             string     `json:"seller"`
 	Selling            Asset      `json:"selling"`
@@ -237,10 +235,43 @@ type Offer struct {
 	LastModifiedTime   *time.Time `json:"last_modified_time"`
 }
 
+// Offer is the display form of an offer to trade currency.
+type Offer struct {
+	offerBase
+	// Action needed in release: horizon-v0.25.0: Make id a string
+	ID int64 `json:"id"`
+}
+
 func (o Offer) PagingToken() string {
 	return o.PT
 }
 
+// UnmarshalJSON is the custom unmarshal method for Offer. It allows
+// parsing of id as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (o *Offer) UnmarshalJSON(data []byte) error {
+	var temp struct {
+		ID json.Number `json:"id"`
+	}
+
+	if err := json.Unmarshal(data, &o.offerBase); err != nil {
+		return err
+	}
+
+	if err := json.Unmarshal(data, &temp); err != nil {
+		return err
+	}
+
+	offerID, err := temp.ID.Int64()
+	if err != nil {
+		return err
+	}
+
+	o.ID = offerID
+
+	return nil
+}
+
 // OrderBookSummary represents a snapshot summary of a given order book
 type OrderBookSummary struct {
 	Bids    []PriceLevel `json:"bids"`
@@ -374,12 +405,9 @@ type TradeEffect struct {
 	LedgerCloseTime   time.Time `json:"created_at"`
 }
 
-// TradeAggregation represents trade data aggregation over a period of time
-type TradeAggregation struct {
-	// Action needed in release: horizon-v0.22.0
-	Timestamp int64 `json:"timestamp"`
-	// Action needed in release: horizon-v0.22.0
-	TradeCount    int64     `json:"trade_count"`
+// Action needed in release: horizon-v0.25.0: Move back to TradeAggregation,
+// remove embedded struct
+type tradeAggregationBase struct {
 	BaseVolume    string    `json:"base_volume"`
 	CounterVolume string    `json:"counter_volume"`
 	Average       string    `json:"avg"`
@@ -393,11 +421,53 @@ type TradeAggregation struct {
 	CloseR        xdr.Price `json:"close_r"`
 }
 
+// TradeAggregation represents trade data aggregation over a period of time
+type TradeAggregation struct {
+	tradeAggregationBase
+	// Action needed in release: horizon-v0.25.0: Make timestamp a string
+	Timestamp int64 `json:"timestamp"`
+	// Action needed in release: horizon-v0.25.0: Make trade_count a string
+	TradeCount int64 `json:"trade_count"`
+}
+
 // PagingToken implementation for hal.Pageable. Not actually used
 func (res TradeAggregation) PagingToken() string {
 	return string(res.Timestamp)
 }
 
+// UnmarshalJSON is the custom unmarshal method for TradeAggregation. It allows
+// parsing of timestamp and trade_count as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (res *TradeAggregation) UnmarshalJSON(data []byte) error {
+	var temp struct {
+		Timestamp  json.Number `json:"timestamp"`
+		TradeCount json.Number `json:"trade_count"`
+	}
+
+	if err := json.Unmarshal(data, &res.tradeAggregationBase); err != nil {
+		return err
+	}
+
+	if err := json.Unmarshal(data, &temp); err != nil {
+		return err
+	}
+
+	timestamp, err := temp.Timestamp.Int64()
+	if err != nil {
+		return err
+	}
+
+	tradeCount, err := temp.TradeCount.Int64()
+	if err != nil {
+		return err
+	}
+
+	res.Timestamp = timestamp
+	res.TradeCount = tradeCount
+
+	return nil
+}
+
 // Transaction represents a single, successful transaction
 type Transaction struct {
 	Links struct {
diff --git a/protocols/horizon/operations/main.go b/protocols/horizon/operations/main.go
index 26aae2bd3e..2c5f9dfe2f 100644
--- a/protocols/horizon/operations/main.go
+++ b/protocols/horizon/operations/main.go
@@ -151,18 +151,57 @@ type CreatePassiveSellOffer struct {
 // is ManageSellOffer.
 type ManageSellOffer struct {
 	Offer
-	// Action needed in release: horizon-v0.23.0
+	// Action needed in release: horizon-v0.25.0: Make offer_id a string
 	OfferID int64 `json:"offer_id"`
 }
 
+// UnmarshalJSON is the custom unmarshal method for ManageSellOffer. It allows
+// parsing of offer_id as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (operation *ManageSellOffer) UnmarshalJSON(data []byte) error {
+	if err := json.Unmarshal(data, &operation.Offer); err != nil {
+		return err
+	}
+
+	offerID, err := base.ExtractOfferID(data)
+
+	if err != nil {
+		return err
+	}
+
+	operation.OfferID = offerID
+
+	return nil
+}
+
 // ManageBuyOffer is the json resource representing a single operation whose type
 // is ManageBuyOffer.
 type ManageBuyOffer struct {
 	Offer
-	// Action needed in release: horizon-v0.23.0
+
+	// Action needed in release: horizon-v0.25.0: Make offer_id a string
 	OfferID int64 `json:"offer_id"`
 }
 
+// UnmarshalJSON is the custom unmarshal method for ManageBuyOffer. It allows
+// parsing of offer_id as a string or an int64.
+// Action needed in release: horizon-v0.25.0: Delete
+func (operation *ManageBuyOffer) UnmarshalJSON(data []byte) error {
+	if err := json.Unmarshal(data, &operation.Offer); err != nil {
+		return err
+	}
+
+	offerID, err := base.ExtractOfferID(data)
+
+	if err != nil {
+		return err
+	}
+
+	operation.OfferID = offerID
+
+	return nil
+}
+
 // SetOptions is the json resource representing a single operation whose type is
 // SetOptions.
 type SetOptions struct {