diff --git a/admin/admin.go b/admin/admin.go
index 4cd5cf043..da9934b55 100644
--- a/admin/admin.go
+++ b/admin/admin.go
@@ -7,8 +7,9 @@ import (
 	"net/http"
 	"sync"
 
+	"github.com/ethereum-optimism/supersim/config"
 	"github.com/ethereum/go-ethereum/log"
-
+	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/gin-gonic/gin"
 )
 
@@ -19,15 +20,24 @@ type AdminServer struct {
 	cancel context.CancelFunc
 	wg     sync.WaitGroup
 
+	rpcServer     *rpc.Server
+	networkConfig *config.NetworkConfig
+
 	port uint64
 }
 
-func NewAdminServer(log log.Logger, port uint64) *AdminServer {
-	return &AdminServer{log: log, port: port}
+type RPCMethods struct {
+	Log           log.Logger
+	NetworkConfig *config.NetworkConfig
+}
+
+func NewAdminServer(log log.Logger, port uint64, networkConfig *config.NetworkConfig) *AdminServer {
+	return &AdminServer{log: log, port: port, networkConfig: networkConfig}
 }
 
 func (s *AdminServer) Start(ctx context.Context) error {
-	router := setupRouter()
+	router := s.setupRouter()
+
 	s.srv = &http.Server{Handler: router}
 
 	listener, err := net.Listen("tcp", fmt.Sprintf(":%d", s.port))
@@ -73,13 +83,69 @@ func (s *AdminServer) Endpoint() string {
 	return fmt.Sprintf("http://127.0.0.1:%d", s.port)
 }
 
-func setupRouter() *gin.Engine {
+func (s *AdminServer) ConfigAsString() string {
+	return fmt.Sprintf("Admin Server: %s\n\n", s.Endpoint())
+}
+
+func filterByChainID(chains []config.ChainConfig, chainId uint64) *config.ChainConfig {
+	for _, chain := range chains {
+		if chain.ChainID == chainId {
+			return &chain
+		}
+	}
+	return nil
+}
+
+func (s *AdminServer) setupRouter() *gin.Engine {
 	gin.SetMode(gin.ReleaseMode)
 	router := gin.New()
 	router.Use(gin.Recovery())
 
+	rpcServer := rpc.NewServer()
+	rpcMethods := &RPCMethods{
+		Log:           s.log,
+		NetworkConfig: s.networkConfig,
+	}
+
+	if err := rpcServer.RegisterName("admin", rpcMethods); err != nil {
+		s.log.Error("failed to register RPC methods:", "error", err)
+		return nil
+	}
+
 	router.GET("/ready", func(c *gin.Context) {
 		c.String(http.StatusOK, "OK")
 	})
+
+	router.POST("/", gin.WrapH(rpcServer))
+
 	return router
 }
+
+func (m *RPCMethods) GetConfig(args *struct{}) *config.NetworkConfig {
+
+	m.Log.Debug("admin_getConfig")
+	return m.NetworkConfig
+}
+
+func (m *RPCMethods) GetL1Addresses(args *uint64) *map[string]string {
+	chain := filterByChainID(m.NetworkConfig.L2Configs, *args)
+	if chain == nil {
+		m.Log.Error("chain not found", "chainID", *args)
+		return nil
+	}
+
+	reply := map[string]string{
+		"AddressManager":                    chain.L2Config.L1Addresses.AddressManager.String(),
+		"L1CrossDomainMessengerProxy":       chain.L2Config.L1Addresses.L1CrossDomainMessengerProxy.String(),
+		"L1ERC721BridgeProxy":               chain.L2Config.L1Addresses.L1ERC721BridgeProxy.String(),
+		"L1StandardBridgeProxy":             chain.L2Config.L1Addresses.L1StandardBridgeProxy.String(),
+		"L2OutputOracleProxy":               chain.L2Config.L1Addresses.L2OutputOracleProxy.String(),
+		"OptimismMintableERC20FactoryProxy": chain.L2Config.L1Addresses.OptimismMintableERC20FactoryProxy.String(),
+		"OptimismPortalProxy":               chain.L2Config.L1Addresses.OptimismPortalProxy.String(),
+		"SystemConfigProxy":                 chain.L2Config.L1Addresses.SystemConfigProxy.String(),
+		"ProxyAdmin":                        chain.L2Config.L1Addresses.ProxyAdmin.String(),
+		"SuperchainConfig":                  chain.L2Config.L1Addresses.SuperchainConfig.String(),
+	}
+	m.Log.Debug("admin_getL2Addresses")
+	return &reply
+}
diff --git a/admin/admin_test.go b/admin/admin_test.go
index 2360d2595..e426b6067 100644
--- a/admin/admin_test.go
+++ b/admin/admin_test.go
@@ -9,15 +9,20 @@ import (
 	"time"
 
 	"github.com/ethereum-optimism/optimism/op-service/testlog"
+	"github.com/ethereum-optimism/supersim/config"
+	"github.com/ethereum-optimism/supersim/testutils"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
 func TestAdminServerBasicFunctionality(t *testing.T) {
+	networkConfig := config.GetDefaultNetworkConfig(uint64(time.Now().Unix()), "")
 	testlog := testlog.Logger(t, log.LevelInfo)
 
 	ctx, cancel := context.WithCancel(context.Background())
-	adminServer := NewAdminServer(testlog, 0)
+	adminServer := NewAdminServer(testlog, 0, &networkConfig)
 	t.Cleanup(func() { cancel() })
 
 	require.NoError(t, adminServer.Start(ctx))
@@ -43,3 +48,49 @@ func TestAdminServerBasicFunctionality(t *testing.T) {
 	}
 	require.Error(t, err)
 }
+
+func TestGetL1AddressesRPC(t *testing.T) {
+	networkConfig := config.GetDefaultNetworkConfig(uint64(time.Now().Unix()), "")
+	testlog := testlog.Logger(t, log.LevelInfo)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	adminServer := NewAdminServer(testlog, 0, &networkConfig)
+	t.Cleanup(func() { cancel() })
+
+	require.NoError(t, adminServer.Start(ctx))
+
+	waitErr := testutils.WaitForWithTimeout(context.Background(), 500*time.Millisecond, 10*time.Second, func() (bool, error) {
+		// Dial the RPC server
+		client, err := rpc.Dial(adminServer.Endpoint())
+		require.NoError(t, err)
+
+		var addresses map[string]string
+		chainID := uint64(902)
+		err = client.CallContext(context.Background(), &addresses, "admin_getL1Addresses", chainID)
+
+		require.NoError(t, err)
+
+		expectedAddresses := map[string]string{
+			"AddressManager":                    "0x90D0B458313d3A207ccc688370eE76B75200EadA",
+			"L1CrossDomainMessengerProxy":       "0xeCA0f912b4bd255f3851951caE5775CC9400aA3B",
+			"L1ERC721BridgeProxy":               "0xdC0917C61A4CD589B29b6464257d564C0abeBB2a",
+			"L1StandardBridgeProxy":             "0x67B2aB287a32bB9ACe84F6a5A30A62597b10AdE9",
+			"L2OutputOracleProxy":               "0x0000000000000000000000000000000000000000",
+			"OptimismMintableERC20FactoryProxy": "0xd4E933aa1f37A755135d7623488a383f8208CC7c",
+			"OptimismPortalProxy":               "0x35e67BC631C327b60C6A39Cff6b03a8adBB19c2D",
+			"ProxyAdmin":                        "0x0000000000000000000000000000000000000000",
+			"SuperchainConfig":                  "0x0000000000000000000000000000000000000000",
+			"SystemConfigProxy":                 "0xFb295Aa436F23BE2Bd17678Adf1232bdec02FED1",
+		}
+
+		for key, expectedValue := range expectedAddresses {
+			if addresses[key] != expectedValue {
+				return false, nil
+			}
+		}
+
+		return true, nil
+	})
+
+	assert.NoError(t, waitErr)
+}
diff --git a/supersim.go b/supersim.go
index 0eeb2e194..5abf52a68 100644
--- a/supersim.go
+++ b/supersim.go
@@ -65,7 +65,8 @@ func NewSupersim(log log.Logger, envPrefix string, closeApp context.CancelCauseF
 		return nil, fmt.Errorf("failed to create orchestrator")
 	}
 
-	adminServer := admin.NewAdminServer(log, cliConfig.AdminPort)
+	adminServer := admin.NewAdminServer(log, cliConfig.AdminPort, &networkConfig)
+
 	return &Supersim{log, cliConfig, &networkConfig, o, adminServer}, nil
 }
 
@@ -108,7 +109,7 @@ func (s *Supersim) ConfigAsString() string {
 
 	fmt.Fprintln(&b, "Supersim Config")
 	fmt.Fprintln(&b, "-----------------------")
-	fmt.Fprintf(&b, "Admin Server: %s\n\n", s.adminServer.Endpoint())
+	fmt.Fprintf(&b, s.adminServer.ConfigAsString())
 
 	fmt.Fprintln(&b, "Chain Configuration")
 	fmt.Fprintln(&b, "-----------------------")