diff --git a/.deny.toml b/.deny.toml
index ea5a4af6..8930c2aa 100644
--- a/.deny.toml
+++ b/.deny.toml
@@ -76,6 +76,7 @@ ignore = [
     #{ crate = "a-crate-that-is-yanked@0.1.1", reason = "you can specify why you are ignoring the yanked crate" },
     { id = "RUSTSEC-2024-0320", reason = "Nothing we can do about it now." },
     { id = "RUSTSEC-2024-0370", reason = "Nothing we can do about it now." },
+    { id = "RUSTSEC-2023-0071", reason = "Nothing we can do about it now." },
 ]
 # If this is true, then cargo deny will use the git executable to fetch advisory database.
 # If this is false, then it uses a built-in git library.
diff --git a/.env b/.env
new file mode 100644
index 00000000..8a373d3e
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+DATABASE_URL=mysql://root:password@localhost:3306/lrzcc
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ca0f96a6..3f27c793 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,23 +19,18 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  SQLX_VERSION: 0.7.3
-  SQLX_FEATURES: "rustls,postgres"
+  SQLX_FEATURES: "rustls,mysql"
+  DATABASE_URL: "mysql://root:password@127.0.0.1:3306/lrzcc"
 
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
-    services:
-      postgres:
-        image: postgres:14
-        env:
-          POSTGRES_USER: postgres
-          POSTGRES_PASSWORD: password
-          POSTGRES_DB: postgres
-        ports:
-          - 5432:5432
     steps:
+      - uses: getong/mariadb-action@v1.11
+        with:
+          mysql database: 'lrzcc'
+          mysql root password: 'password'
       - name: Check out repository code
         uses: actions/checkout@v4
       - name: Rust Cache Action
@@ -49,8 +44,8 @@ jobs:
           --features ${{ env.SQLX_FEATURES }}
           --no-default-features
           --locked
-      - name: Install postgresql-client and mold
-        run: sudo apt update && sudo apt install postgresql-client mold -y
+      - name: Install mariadb-client and mold
+        run: sudo apt update && sudo apt install mariadb-client mold -y
       - name: Migrate database
         run: SKIP_DOCKER=true ./scripts/init_db.sh
       - name: Check sqlx offline data is up to date
diff --git a/.mariadb.cnf b/.mariadb.cnf
new file mode 100644
index 00000000..0504ef8a
--- /dev/null
+++ b/.mariadb.cnf
@@ -0,0 +1,7 @@
+[client]
+protocol = tcp
+host = 127.0.0.1
+port = 3306
+user = root
+password = password
+database = lrzcc
diff --git a/Cargo.lock b/Cargo.lock
index 1e853daa..f02b11a7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1542,6 +1542,7 @@ dependencies = [
  "cargo-husky",
  "config",
  "jzon",
+ "lrzcc-wire",
  "once_cell",
  "reqwest",
  "secrecy",
diff --git a/api/Cargo.toml b/api/Cargo.toml
index b5164578..6b6e526a 100644
--- a/api/Cargo.toml
+++ b/api/Cargo.toml
@@ -25,13 +25,13 @@ path = "src/main.rs"
 [features]
 default = ["all"]
 all = ["accounting", "budgeting", "hello", "pricing", "quota", "resources", "user"]
-accounting = []
-budgeting = []
-hello = []
-pricing = []
-quota = []
-resources = []
-user = []
+accounting = ["lrzcc-wire/accounting"]
+budgeting = ["lrzcc-wire/budgeting"]
+hello = ["lrzcc-wire/hello"]
+pricing = ["lrzcc-wire/pricing"]
+quota = ["lrzcc-wire/quota"]
+resources = ["lrzcc-wire/resources"]
+user = ["lrzcc-wire/user"]
 
 [dependencies]
 actix-web = "4"
@@ -49,6 +49,7 @@ config = "0.14"
 uuid = { version = "1.10", features = ["v4", "serde"] }
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 jzon = "0.12"
+lrzcc-wire = { version = "1.0", path = "../wire" }
 
 [dependencies.sqlx]
 version = "0.8"
@@ -57,7 +58,7 @@ features = [
     "runtime-tokio",
     "tls-rustls",
     "macros",
-    "postgres",
+    "mysql",
     "uuid",
     "chrono",
     "migrate",
diff --git a/api/configuration/base.yaml b/api/configuration/base.yaml
index adf411d8..64e4d84d 100644
--- a/api/configuration/base.yaml
+++ b/api/configuration/base.yaml
@@ -2,8 +2,8 @@ application:
   port: 8000
 database:
   host: "127.0.0.1"
-  port: 5432
-  username: "postgres"
+  port: 3306
+  username: "root"
   password: "password"
   database_name: "lrzcc"
 openstack:
diff --git a/api/migrations/20240912151726_create_project_table.sql b/api/migrations/20240912151726_create_project_table.sql
new file mode 100644
index 00000000..256e0df4
--- /dev/null
+++ b/api/migrations/20240912151726_create_project_table.sql
@@ -0,0 +1,6 @@
+CREATE TABLE project (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    name TEXT(255) UNIQUE NOT NULL,
+    openstack_id TEXT(255) UNIQUE NOT NULL,
+    user_class SMALLINT UNSIGNED NOT NULL
+);
diff --git a/api/src/configuration.rs b/api/src/configuration.rs
index 2cef6dad..e8f801b1 100644
--- a/api/src/configuration.rs
+++ b/api/src/configuration.rs
@@ -1,6 +1,6 @@
 use secrecy::{ExposeSecret, Secret};
 use serde_aux::field_attributes::deserialize_number_from_string;
-use sqlx::postgres::{PgConnectOptions, PgSslMode};
+use sqlx::mysql::{MySqlConnectOptions, MySqlSslMode};
 
 #[derive(Clone, serde::Deserialize)]
 pub struct Settings {
@@ -41,13 +41,13 @@ pub struct OpenStackSettings {
 }
 
 impl DatabaseSettings {
-    pub fn without_db(&self) -> PgConnectOptions {
+    pub fn without_db(&self) -> MySqlConnectOptions {
         let ssl_mode = if self.require_ssl {
-            PgSslMode::Require
+            MySqlSslMode::Required
         } else {
-            PgSslMode::Prefer
+            MySqlSslMode::Preferred
         };
-        PgConnectOptions::new()
+        MySqlConnectOptions::new()
             .host(&self.host)
             .port(self.port)
             .ssl_mode(ssl_mode)
@@ -55,7 +55,7 @@ impl DatabaseSettings {
             .password(self.password.expose_secret())
     }
 
-    pub fn with_db(&self) -> PgConnectOptions {
+    pub fn with_db(&self) -> MySqlConnectOptions {
         self.without_db().database(&self.database_name)
     }
 }
diff --git a/api/src/openstack.rs b/api/src/openstack.rs
index bb19a77e..7032b66d 100644
--- a/api/src/openstack.rs
+++ b/api/src/openstack.rs
@@ -60,7 +60,7 @@ pub struct OpenStack {
     token: TokenHandler,
 }
 
-#[derive(Debug, serde::Deserialize)]
+#[derive(Clone, Debug, serde::Deserialize)]
 pub struct ProjectMinimal {
     pub id: String,
     pub name: String,
diff --git a/api/src/routes/hello.rs b/api/src/routes/hello.rs
index 8afd4d60..3ac7c669 100644
--- a/api/src/routes/hello.rs
+++ b/api/src/routes/hello.rs
@@ -1,18 +1,15 @@
+use crate::openstack::ProjectMinimal;
+use actix_web::web::ReqData;
 use actix_web::HttpResponse;
+use lrzcc_wire::hello::Hello;
 
 #[tracing::instrument(name = "hello")]
-pub async fn hello() -> Result<HttpResponse, actix_web::Error> {
-    // TODO implement
-    Ok(HttpResponse::Ok().finish())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[tokio::test]
-    async fn hello_works() {
-        let response = hello().await.unwrap();
-        assert!(response.status().is_success())
-    }
+pub async fn hello(
+    project: ReqData<ProjectMinimal>,
+) -> Result<HttpResponse, actix_web::Error> {
+    Ok(HttpResponse::Ok()
+        .content_type("application/json")
+        .json(Hello {
+            message: format!("Hello, user {}!", project.name),
+        }))
 }
diff --git a/api/src/startup.rs b/api/src/startup.rs
index 3c41de44..7a8f00f8 100644
--- a/api/src/startup.rs
+++ b/api/src/startup.rs
@@ -5,8 +5,8 @@ use crate::routes::{health_check, hello};
 use actix_web::{
     dev::Server, middleware::from_fn, web, web::Data, App, HttpServer,
 };
-use sqlx::postgres::PgPoolOptions;
-use sqlx::PgPool;
+use sqlx::mysql::MySqlPoolOptions;
+use sqlx::MySqlPool;
 use std::net::TcpListener;
 use tracing_actix_web::TracingLogger;
 
@@ -50,7 +50,7 @@ pub struct ApplicationBaseUrl(pub String);
 
 async fn run(
     listener: TcpListener,
-    db_pool: PgPool,
+    db_pool: MySqlPool,
     base_url: String,
     openstack: OpenStack,
 ) -> Result<Server, anyhow::Error> {
@@ -78,6 +78,6 @@ async fn run(
     Ok(server)
 }
 
-pub fn get_connection_pool(configuration: &DatabaseSettings) -> PgPool {
-    PgPoolOptions::new().connect_lazy_with(configuration.with_db())
+pub fn get_connection_pool(configuration: &DatabaseSettings) -> MySqlPool {
+    MySqlPoolOptions::new().connect_lazy_with(configuration.with_db())
 }
diff --git a/api/tests/api/hello.rs b/api/tests/api/hello.rs
index 8e195128..a6b18a06 100644
--- a/api/tests/api/hello.rs
+++ b/api/tests/api/hello.rs
@@ -1,3 +1,4 @@
+use lrzcc_wire::hello::Hello;
 use uuid::Uuid;
 
 use crate::helpers::spawn_app;
@@ -52,7 +53,8 @@ async fn hello_works_with_valid_token() {
     let app = spawn_app().await;
     let client = reqwest::Client::new();
     let token = Uuid::new_v4().to_string();
-    app.mock_keystone_auth(&token, "project_id", "project_name")
+    let project_name = "project_name";
+    app.mock_keystone_auth(&token, "project_id", project_name)
         .mount(&app.keystone_server)
         .await;
 
@@ -66,4 +68,28 @@ async fn hello_works_with_valid_token() {
 
     // assert
     assert_eq!(response.status().as_u16(), 200);
+    assert_eq!(
+        response.headers().get("Content-Type").unwrap(),
+        "application/json"
+    );
+    let hello =
+        serde_json::from_str::<Hello>(&response.text().await.unwrap()).unwrap();
+    assert_eq!(hello.message, format!("Hello, user {}!", project_name));
+}
+
+#[tokio::test]
+async fn database_insert_works() {
+    // arrange
+    let app = spawn_app().await;
+
+    // act and assert
+    sqlx::query!(
+        "INSERT INTO project (name, openstack_id, user_class) VALUES (?, ?, ?)",
+        "test",
+        "some-uuid",
+        4,
+    )
+    .execute(&app.db_pool)
+    .await
+    .expect("Failed to insert user.");
 }
diff --git a/api/tests/api/helpers.rs b/api/tests/api/helpers.rs
index b768e494..5406f0ef 100644
--- a/api/tests/api/helpers.rs
+++ b/api/tests/api/helpers.rs
@@ -3,7 +3,7 @@ use lrzcc_api::startup::{get_connection_pool, Application};
 use lrzcc_api::telemetry::{get_subscriber, init_subscriber};
 use once_cell::sync::Lazy;
 use serde_json::json;
-use sqlx::{Connection, Executor, PgConnection, PgPool};
+use sqlx::{Connection, Executor, MySqlConnection, MySqlPool};
 use uuid::Uuid;
 use wiremock::matchers::{header, method, path};
 use wiremock::{Mock, MockServer, ResponseTemplate};
@@ -31,7 +31,7 @@ static TRACING: Lazy<()> = Lazy::new(|| {
 pub struct TestApp {
     pub address: String,
     pub _port: u16,
-    pub _db_pool: sqlx::PgPool,
+    pub db_pool: sqlx::MySqlPool,
     pub _api_client: reqwest::Client,
     pub keystone_server: MockServer,
     pub keystone_token: String,
@@ -70,7 +70,7 @@ pub async fn spawn_app() -> TestApp {
 
     let configuration = {
         let mut c = get_configuration().expect("Failed to read configuration.");
-        c.database.database_name = Uuid::new_v4().to_string();
+        c.database.database_name = Uuid::new_v4().simple().to_string();
         c.application.port = 0;
         c.openstack.keystone_endpoint = keystone_server.uri();
         c
@@ -102,7 +102,7 @@ pub async fn spawn_app() -> TestApp {
     let test_app = TestApp {
         address: format!("http://127.0.0.1:{}", application_port),
         _port: application_port,
-        _db_pool: get_connection_pool(&configuration.database),
+        db_pool: get_connection_pool(&configuration.database),
         _api_client: client,
         keystone_server,
         keystone_token,
@@ -110,22 +110,26 @@ pub async fn spawn_app() -> TestApp {
     test_app
 }
 
-async fn configure_database(config: &DatabaseSettings) -> PgPool {
+async fn configure_database(config: &DatabaseSettings) -> MySqlPool {
     // Create database
-    let mut connection = PgConnection::connect_with(&config.without_db())
+    let mut connection = MySqlConnection::connect_with(&config.without_db())
         .await
-        .expect("Failed to connect to Postgres.");
+        .expect("Failed to connect to MariaDB.");
     connection
         .execute(
-            format!(r#"CREATE DATABASE "{}";"#, config.database_name).as_str(),
+            format!(
+                "CREATE DATABASE IF NOT EXISTS `{}`;",
+                config.database_name
+            )
+            .as_str(),
         )
         .await
         .expect("Failed to create database.");
 
     // Migrate database
-    let connection_pool = PgPool::connect_with(config.with_db())
+    let connection_pool = MySqlPool::connect_with(config.with_db())
         .await
-        .expect("Failed to connect to Postgres.");
+        .expect("Failed to connect to MariaDB.");
     sqlx::migrate!("./migrations")
         .run(&connection_pool)
         .await
diff --git a/scripts/init_db.sh b/scripts/init_db.sh
index e65c2098..f8a23f5e 100755
--- a/scripts/init_db.sh
+++ b/scripts/init_db.sh
@@ -2,8 +2,8 @@
 set -x
 set -eo pipefail
 
-if ! [ -x "$(command -v psql)" ]; then
-    echo >&2 "Error: psql is not installed."
+if ! [ -x "$(command -v mariadb)" ]; then
+    echo >&2 "Error: mariadb-client is not installed."
     exit 1
 fi
 
@@ -15,32 +15,30 @@ if ! [ -x "$(command -v sqlx)" ]; then
     exit 1
 fi
 
-DB_USER=${POSTGRES_USER:=postgres}
-DB_PASSWORD="${POSTGRES_PASSWORD:=password}"
-DB_NAME="${POSTGRES_DB:=lrzcc}"
-DB_PORT="${POSTGRES_PORT:=5432}"
+DB_HOST="${MARIADB_HOST:=127.0.0.1}"
+DB_USER=${MARIADB_USER:=root}
+DB_PASSWORD="${MARIADB_PASSWORD:=password}"
+DB_NAME="${MARIADB_DB:=lrzcc}"
+DB_PORT="${MARIADB_PORT:=3306}"
 
 if [[ -z "${SKIP_DOCKER}" ]]
 then
     docker run \
-        -e POSTGRES_USER="${DB_USER}" \
-        -e POSTGRES_PASSWORD="${DB_PASSWORD}" \
-        -e POSTGRES_DB="${DB_NAME}" \
-        -p "${DB_PORT}":5432 \
-        -d postgres \
-        postgres -N 1000
+        -e MARIADB_ROOT_PASSWORD="${DB_PASSWORD}" \
+        -e MARIADB_DB="${DB_NAME}" \
+        -p "${DB_PORT}":3306 \
+        -d mariadb:latest
 fi
 
-export PGPASSWORD="${DB_PASSWORD}"
-until psql -h "localhost" -U "${DB_USER}" -p "${DB_PORT}" -c '\q'; do
-    >&2 echo "Postgres is still unavailable - sleeping"
+until mariadb -h "${DB_HOST}" -P "${DB_PORT}" -u "${DB_USER}" -p"${DB_PASSWORD}" -D "" -e "QUIT"; do
+    >&2 echo "MariaDB is still unavailable - sleeping"
     sleep 1
 done
 
->&2 echo "Postgres is up and running on port ${DB_PORT}!"
+>&2 echo "MariaDB is up and running on ${DB_HOST} on port ${DB_PORT}!"
 
-export DATABASE_URL=postgresql://${DB_USER}:${DB_PASSWORD}@localhost:${DB_PORT}/${DB_NAME}
+export DATABASE_URL=mysql://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}
 sqlx database create
 sqlx migrate run
 
->&2 echo "Postgres has been migrated, ready to go!"
+>&2 echo "MariaDB has been migrated, ready to go!"
diff --git a/scripts/mariadb.sh b/scripts/mariadb.sh
new file mode 100755
index 00000000..5bc442b4
--- /dev/null
+++ b/scripts/mariadb.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+mariadb --defaults-file=.mariadb.cnf