diff --git a/scarb/src/bin/scarb/main.rs b/scarb/src/bin/scarb/main.rs
index 8d2bfb2b5..ba529cf63 100644
--- a/scarb/src/bin/scarb/main.rs
+++ b/scarb/src/bin/scarb/main.rs
@@ -75,6 +75,7 @@ fn cli_main(args: ScarbArgs) -> Result<()> {
         .offline(args.offline)
         .log_filter_directive(Some(scarb_log))
         .profile(args.profile_spec.determine()?)
+        .with_registry()
         .build()?;
 
     commands::run(args.command, &mut config)
diff --git a/scarb/src/core/config.rs b/scarb/src/core/config.rs
index ba30895f1..3a24e4de7 100644
--- a/scarb/src/core/config.rs
+++ b/scarb/src/core/config.rs
@@ -9,18 +9,20 @@ use camino::{Utf8Path, Utf8PathBuf};
 use once_cell::sync::OnceCell;
 use tokio::runtime::{Builder, Handle, Runtime};
 use tracing::trace;
+use url::Url;
 use which::which_in;
 
 use scarb_ui::{OutputFormat, Ui, Verbosity};
 
 use crate::compiler::plugin::CairoPluginRepository;
 use crate::compiler::{CompilerRepository, Profile};
+use crate::core::registry::DEFAULT_REGISTRY_INDEX;
 use crate::core::AppDirs;
 #[cfg(doc)]
 use crate::core::Workspace;
 use crate::flock::AdvisoryLock;
 use crate::internal::fsx;
-use crate::SCARB_ENV;
+use crate::{REGISTRY_URL_ENV, SCARB_ENV};
 
 use super::ManifestDependency;
 
@@ -46,6 +48,7 @@ pub struct Config {
     tokio_handle: OnceCell<Handle>,
     profile: Profile,
     http_client: OnceCell<reqwest::Client>,
+    registry_url: Url,
 }
 
 impl Config {
@@ -77,6 +80,7 @@ impl Config {
         if let Some(handle) = b.tokio_handle {
             tokio_handle.set(handle).unwrap();
         }
+        let registry_url = b.registry_url.unwrap_or(DEFAULT_REGISTRY_INDEX.clone());
 
         Ok(Self {
             manifest_path: b.manifest_path,
@@ -95,6 +99,7 @@ impl Config {
             tokio_handle,
             profile,
             http_client: OnceCell::new(),
+            registry_url,
         })
     }
 
@@ -285,6 +290,10 @@ impl Config {
         );
         self.http()
     }
+
+    pub fn registry_url(&self) -> &Url {
+        &self.registry_url
+    }
 }
 
 #[derive(Debug)]
@@ -303,6 +312,7 @@ pub struct ConfigBuilder {
     custom_source_patches: Option<Vec<ManifestDependency>>,
     tokio_handle: Option<Handle>,
     profile: Option<Profile>,
+    registry_url: Option<Url>,
 }
 
 impl ConfigBuilder {
@@ -322,6 +332,7 @@ impl ConfigBuilder {
             custom_source_patches: None,
             tokio_handle: None,
             profile: None,
+            registry_url: None,
         }
     }
 
@@ -405,4 +416,15 @@ impl ConfigBuilder {
         self.profile = Some(profile);
         self
     }
+
+    pub fn with_registry(mut self) -> Self {
+        self.registry_url = match env::var(REGISTRY_URL_ENV) {
+            Ok(value) => match Url::parse(&value) {
+                Ok(parsed_url) => Some(parsed_url),
+                Err(_) => panic!("Failed to parse url set by SCARB_REGISTRY_URL env variable"),
+            },
+            Err(_) => None,
+        };
+        self
+    }
 }
diff --git a/scarb/src/core/manifest/summary.rs b/scarb/src/core/manifest/summary.rs
index abb876f21..cb56e4955 100644
--- a/scarb/src/core/manifest/summary.rs
+++ b/scarb/src/core/manifest/summary.rs
@@ -7,7 +7,7 @@ use typed_builder::TypedBuilder;
 #[cfg(doc)]
 use crate::core::Manifest;
 use crate::core::{
-    Checksum, DepKind, DependencyVersionReq, ManifestDependency, PackageId, PackageName,
+    Checksum, DepKind, DependencyVersionReq, ManifestDependency, PackageId, PackageName, SourceId,
 };
 
 /// Subset of a [`Manifest`] that contains only the most important information about a package.
@@ -74,6 +74,7 @@ impl Summary {
             ManifestDependency::builder()
                 .name(PackageName::CORE)
                 .version_req(DependencyVersionReq::exact(&cairo_version))
+                .source_id(SourceId::for_std())
                 .build()
         });
         let mut deps: Vec<&ManifestDependency> = Vec::new();
diff --git a/scarb/src/core/manifest/toml_manifest.rs b/scarb/src/core/manifest/toml_manifest.rs
index 9a40ab91e..99a713649 100644
--- a/scarb/src/core/manifest/toml_manifest.rs
+++ b/scarb/src/core/manifest/toml_manifest.rs
@@ -356,10 +356,11 @@ impl TomlManifest {
 }
 
 impl TomlDependency {
-    fn resolve(&self) -> Cow<'_, DetailedTomlDependency> {
+    fn resolve(&self, registry_url: &Url) -> Cow<'_, DetailedTomlDependency> {
         match self {
             TomlDependency::Simple(version) => Cow::Owned(DetailedTomlDependency {
                 version: Some(version.clone()),
+                registry: Some(registry_url.to_owned()),
                 ..Default::default()
             }),
             TomlDependency::Detailed(detailed) => Cow::Borrowed(detailed),
@@ -392,6 +393,7 @@ impl TomlManifest {
         source_id: SourceId,
         profile: Profile,
         workspace_manifest: Option<&TomlManifest>,
+        registry_url: &Url,
     ) -> Result<Manifest> {
         let root = manifest_path
             .parent()
@@ -443,11 +445,18 @@ impl TomlManifest {
                     .and_then(|deps| deps.get(name.as_str()))
                     .cloned()
                     .ok_or_else(|| anyhow!("dependency `{}` not found in workspace", name.clone()))?
-                    .to_dependency(name.clone(), workspace_manifest_path, kind.clone())
+                    .to_dependency(
+                        name.clone(),
+                        workspace_manifest_path,
+                        kind.clone(),
+                        registry_url,
+                    )
             };
             let toml_dep = toml_dep
                 .clone()
-                .map(|dep| dep.to_dependency(name.clone(), manifest_path, kind.clone()))?
+                .map(|dep| {
+                    dep.to_dependency(name.clone(), manifest_path, kind.clone(), registry_url)
+                })?
                 .resolve(name.as_str(), inherit_ws)?;
             dependencies.push(toml_dep);
         }
@@ -959,8 +968,10 @@ impl TomlDependency {
         name: PackageName,
         manifest_path: &Utf8Path,
         dep_kind: DepKind,
+        registry_url: &Url,
     ) -> Result<ManifestDependency> {
-        self.resolve().to_dependency(name, manifest_path, dep_kind)
+        self.resolve(registry_url)
+            .to_dependency(name, manifest_path, dep_kind)
     }
 }
 
diff --git a/scarb/src/core/registry/index/config.rs b/scarb/src/core/registry/index/config.rs
index 136d68193..0a5d28f53 100644
--- a/scarb/src/core/registry/index/config.rs
+++ b/scarb/src/core/registry/index/config.rs
@@ -44,7 +44,7 @@ pub struct IndexConfig {
 }
 
 impl IndexConfig {
-    pub const WELL_KNOWN_PATH: &'static str = "config.json";
+    pub const WELL_KNOWN_PATH: &'static str = "api/v1/index/config.json";
 }
 
 #[derive(Copy, Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
diff --git a/scarb/src/core/registry/mod.rs b/scarb/src/core/registry/mod.rs
index dc1a235f0..ca205da81 100644
--- a/scarb/src/core/registry/mod.rs
+++ b/scarb/src/core/registry/mod.rs
@@ -1,5 +1,7 @@
 use anyhow::Result;
 use async_trait::async_trait;
+use once_cell::sync::Lazy;
+use url::Url;
 
 use crate::core::{ManifestDependency, Package, PackageId, Summary};
 
@@ -11,7 +13,10 @@ pub mod patch_map;
 pub mod patcher;
 pub mod source_map;
 
-pub const DEFAULT_REGISTRY_INDEX: &str = "https://there-is-no-default-registry-yet.com";
+pub static DEFAULT_REGISTRY_INDEX: Lazy<Url> = Lazy::new(|| {
+    Url::parse("https://there-is-no-default-registry-yet.com")
+        .expect("Default registry URL is invalid")
+});
 
 #[async_trait(?Send)]
 pub trait Registry {
diff --git a/scarb/src/core/source/id.rs b/scarb/src/core/source/id.rs
index fcc5387f6..38c6c1dff 100644
--- a/scarb/src/core/source/id.rs
+++ b/scarb/src/core/source/id.rs
@@ -237,8 +237,7 @@ impl SourceId {
 
     pub fn default_registry() -> Self {
         static CACHE: Lazy<SourceId> = Lazy::new(|| {
-            let url = Url::parse(DEFAULT_REGISTRY_INDEX).unwrap();
-            SourceId::new(url, SourceKind::Registry).unwrap()
+            SourceId::new(DEFAULT_REGISTRY_INDEX.clone(), SourceKind::Registry).unwrap()
         });
         *CACHE
     }
diff --git a/scarb/src/lib.rs b/scarb/src/lib.rs
index 47225fcbd..0df08f4d4 100644
--- a/scarb/src/lib.rs
+++ b/scarb/src/lib.rs
@@ -40,3 +40,4 @@ pub const STARKNET_PLUGIN_NAME: &str = "starknet";
 pub const TEST_PLUGIN_NAME: &str = "cairo_test";
 pub const TEST_ASSERTS_PLUGIN_NAME: &str = "assert_macros";
 pub const CAIRO_RUN_PLUGIN_NAME: &str = "cairo_run";
+pub const REGISTRY_URL_ENV: &str = "SCARB_REGISTRY_URL";
diff --git a/scarb/src/ops/resolve.rs b/scarb/src/ops/resolve.rs
index 2edfc044f..55a41f71a 100644
--- a/scarb/src/ops/resolve.rs
+++ b/scarb/src/ops/resolve.rs
@@ -75,7 +75,10 @@ pub fn resolve_workspace_with_opts(
             let cairo_version = crate::version::get().cairo.version.parse().unwrap();
             let version_req = DependencyVersionReq::exact(&cairo_version);
             patch_map.insert(
-                SourceId::default().canonical_url.clone(),
+                SourceId::for_registry(ws.config().registry_url())
+                    .expect("Failed to obtain registry url")
+                    .canonical_url
+                    .clone(),
                 [
                     ManifestDependency::builder()
                         .name(PackageName::CORE)
diff --git a/scarb/src/ops/workspace.rs b/scarb/src/ops/workspace.rs
index 6dbb9f7d2..d3db447a7 100644
--- a/scarb/src/ops/workspace.rs
+++ b/scarb/src/ops/workspace.rs
@@ -86,6 +86,7 @@ fn read_workspace_root<'c>(
                 source_id,
                 config.profile(),
                 Some(&toml_manifest),
+                config.registry_url(),
             )
             .with_context(|| format!("failed to parse manifest at: {manifest_path}"))?;
         let manifest = Box::new(manifest);
@@ -118,6 +119,7 @@ fn read_workspace_root<'c>(
                         source_id,
                         config.profile(),
                         Some(&toml_manifest),
+                        config.registry_url(),
                     )
                     .with_context(|| format!("failed to parse manifest at: {manifest_path}"))?;
                 let manifest = Box::new(manifest);