diff --git a/assets/api core diagram.png b/assets/api core diagram.png
new file mode 100644
index 0000000..5c68e45
Binary files /dev/null and b/assets/api core diagram.png differ
diff --git a/src/server.js b/src/server.js
index 30f0ce3..663269e 100644
--- a/src/server.js
+++ b/src/server.js
@@ -1,3 +1,5 @@
+// import contacts from "../data/contacts"
+
 const express = require("express")
 const morgan = require("morgan")
 const cors = require("cors")
@@ -8,6 +10,124 @@ app.use(cors())
 app.use(express.json())
 
 // write your app code here
+// tried to import contacts but it would crash my terminal using npm start
+// console.log(contacts)
+const contacts = [
+    {
+      id: 1,
+      firstName: "John",
+      lastName: "Carmack",
+      street: "10 Keen Street",
+      city: "London",
+      type: "work",
+      email: "test@test.com",
+      linkedin: "https://www.linkedin.com/school/boolean-uk/",
+      twitter: "https://twitter.com/booleanuk"
+    },
+    {
+      id: 2,
+      firstName: "Grace",
+      lastName: "Hopper",
+      street: "32 Deebug Road",
+      city: "London",
+      type: "personal",
+      email: "test@test.com",
+      linkedin: "https://www.linkedin.com/school/boolean-uk/",
+      twitter: "https://twitter.com/booleanuk"
+    }
+]
+
+let idCount = 3
+// const contacts = JSON.parse([
+//   {
+//     "id": 1,
+//     "firstName": "John",
+//     "lastName": "Carmack",
+//     "street": "10 Keen Street",
+//     "city": "London",
+//     "type": "work",
+//     "email": "test@test.com",
+//     "linkedin": "https://www.linkedin.com/school/boolean-uk/",
+//     "twitter": "https://twitter.com/booleanuk"
+//   },
+//   {
+//     "id": 2,
+//     "firstName": "Grace",
+//     "lastName": "Hopper",
+//     "street": "32 Deebug Road",
+//     "city": "London",
+//     "type": "personal",
+//     "email": "test@test.com",
+//     "linkedin": "https://www.linkedin.com/school/boolean-uk/",
+//     "twitter": "https://twitter.com/booleanuk"
+//   }
+// ])
+
+// console.log(contacts)
+
+app.get("/contacts", (req, res) => {
+  res.status(200).json({
+    contacts
+  })
+})
+
+app.get("/contacts/:id", (req, res) => {
+  const id = Number(req.params.id)
+  // console.log(id)
+  const contact = contacts.find(con => con.id === id)
+  // console.log(contact)
+  res.json({
+    contact
+  })
+})
+
+app.post("/contacts", (req, res) => {
+  // console.log(req.body)
+  let newContact = req.body
+  newContact.id = idCount
+  idCount++
+
+  contacts.push(newContact)
+  res.status(201).json({
+    contact: newContact
+  })
+})
+
+app.delete("/contacts/:id", (req, res) => {
+  const id = Number(req.params.id)
+  let contactIndex
+  for (let x = 0; x < contacts.length; x++) {
+    if (contacts[x].id === id) {
+      contactIndex = x
+    }
+  }
+  let contact = contacts.splice(contactIndex, 1)
+  // console.log(contact)
+  res.status(200).json({
+    contact: contact[0]
+  })
+})
+
+app.put("/contacts/:id", (req, res) => {
+  const id = Number(req.params.id)
+  // console.log(req.body)
+  let contactIndex
+  let newContact = req.body
+  newContact.id = id 
+  contacts.forEach((contact, index) => {
+    if(contact.id === id) {
+      contactIndex = index
+    }
+  })
+  contacts.splice(contactIndex, 1, newContact)
+
+
+  res.status(200).json({
+    contact: newContact
+  })
+})
+
+
 
 
 module.exports = app