diff --git a/Sequence Diagram.png b/Sequence Diagram.png
new file mode 100644
index 0000000..4cff77c
Binary files /dev/null and b/Sequence Diagram.png differ
diff --git a/src/server.js b/src/server.js
index 30f0ce3..6c144ae 100644
--- a/src/server.js
+++ b/src/server.js
@@ -1,13 +1,155 @@
-const express = require("express")
-const morgan = require("morgan")
-const cors = require("cors")
+const express = require('express')
+const morgan = require('morgan')
+const cors = require('cors')
 const app = express()
+let contacts = require('../data/contacts.js')
+let meetings = require('../data/meetings.js')
 
-app.use(morgan("dev"))
+app.use(morgan('dev'))
 app.use(cors())
 app.use(express.json())
 
 // write your app code here
 
+let nextId = 3
+
+app.get('/contacts', (req, res) => {
+    res.send({ contacts: contacts })
+})
+
+app.post('/contacts', (req, res) => {
+    const newContact = { id: nextId, ...req.body }
+
+    contacts.push(newContact)
+
+    nextId++
+
+    res.status(201).send({ contact: newContact })
+})
+
+app.get('/contacts/:id', (req, res) => {
+    const matchingContact = contacts.find((element) => {
+        return element.id === parseInt(req.params['id'])
+    })
+
+    if (!matchingContact) {
+        res.sendStatus(404)
+    }
+
+    res.send({ contact: matchingContact })
+})
+
+app.delete('/contacts/:id', (req, res) => {
+    const matchingContact = contacts.find((element) => {
+        return element.id === parseInt(req.params['id'])
+    })
+
+    if (!matchingContact) {
+        res.sendStatus(404)
+    }
+
+    contacts = contacts.filter((element) => {
+        return !(element.id === parseInt(req.params['id']))
+    })
+
+    meetings = meetings.filter((element) => {
+        return !(element.contactId === parseInt(req.params['id']))
+    })
+
+    res.send({ contact: matchingContact })
+})
+
+app.put('/contacts/:id', (req, res) => {
+    let matchingContact = contacts.find((element) => {
+        return element.id === parseInt(req.params['id'])
+    })
+
+    if (!matchingContact) {
+        res.sendStatus(404)
+    }
+
+    Object.keys(matchingContact).forEach((element) => {
+        matchingContact[element] = req.body[element]
+    })
+
+    matchingContact.id = parseInt(req.params['id'])
+
+    res.send({ contact: matchingContact })
+})
+
+let nextMeetingId = 4
+
+app.get('/meetings', (req, res) => {
+    res.send({ meetings: meetings })
+})
+
+app.post('/contacts/:id/meetings', (req, res) => {
+    const newMeeting = {
+        id: nextMeetingId,
+        contactId: parseInt(req.params['id']),
+        ...req.body,
+    }
+
+    meetings.push(newMeeting)
+
+    nextMeetingId++
+
+    res.status(201).send({ meeting: newMeeting })
+})
+
+app.get('/meetings/:id', (req, res) => {
+    const matchingMeeting = meetings.find((element) => {
+        return element.contactId === parseInt(req.params['id'])
+    })
+
+    if (!matchingMeeting) {
+        res.sendStatus(404)
+    }
+
+    res.send({ meeting: matchingMeeting })
+})
+
+app.delete('/meetings/:id', (req, res) => {
+    const matchingMeeting = meetings.find((element) => {
+        return element.id === parseInt(req.params['id'])
+    })
+
+    if (!matchingMeeting) {
+        res.sendStatus(404)
+    }
+
+    meetings = meetings.filter((element) => {
+        return !(element.id === parseInt(req.params['id']))
+    })
+
+    res.send({ meeting: matchingMeeting })
+})
+
+app.put('/meetings/:id', (req, res) => {
+    
+    let matchingMeeting = meetings.find((element, index) => {
+        return element.id === parseInt(req.params['id'])
+    })
+
+    if (!matchingMeeting) {
+        res.sendStatus(404)
+    }
+
+    Object.keys(matchingMeeting).forEach((element) => {
+        if (req.body[element]) {
+            matchingMeeting[element] = req.body[element]
+        }
+    })
+
+    res.send({ meeting: matchingMeeting })
+})
+
+app.get('/contacts/:id/meetings', (req, res) => {
+    const contactsMeetings = meetings.filter((element) => {
+        return element.contactId === parseInt(req.params['id'])
+    })
+
+    res.send({ meetings: contactsMeetings })
+})
 
 module.exports = app