diff --git a/pki/pki.go b/pki/pki.go
index 30b31a9a9..1727d8a8b 100644
--- a/pki/pki.go
+++ b/pki/pki.go
@@ -9,7 +9,7 @@ import (
 	"strings"
 
 	"github.com/cloudflare/circl/sign"
-	"github.com/cloudflare/circl/sign/api"
+	"github.com/cloudflare/circl/sign/schemes"
 )
 
 var allSchemesByOID map[string]sign.Scheme
@@ -23,14 +23,14 @@ type pkixPrivKey struct {
 
 func init() {
 	allSchemesByOID = make(map[string]sign.Scheme)
-	for _, scheme := range api.AllSchemes() {
+	for _, scheme := range schemes.All() {
 		if cert, ok := scheme.(CertificateScheme); ok {
 			allSchemesByOID[cert.Oid().String()] = scheme
 		}
 	}
 
 	allSchemesByTLS = make(map[uint]sign.Scheme)
-	for _, scheme := range api.AllSchemes() {
+	for _, scheme := range schemes.All() {
 		if tlsScheme, ok := scheme.(TLSScheme); ok {
 			allSchemesByTLS[tlsScheme.TLSIdentifier()] = scheme
 		}
diff --git a/pki/pki_test.go b/pki/pki_test.go
index 1f24cb27f..07d3ddd70 100644
--- a/pki/pki_test.go
+++ b/pki/pki_test.go
@@ -4,11 +4,11 @@ import (
 	"testing"
 
 	"github.com/cloudflare/circl/pki"
-	"github.com/cloudflare/circl/sign/api"
+	"github.com/cloudflare/circl/sign/schemes"
 )
 
 func TestPEM(t *testing.T) {
-	for _, scheme := range api.AllSchemes() {
+	for _, scheme := range schemes.All() {
 		scheme := scheme
 		t.Run(scheme.Name(), func(t *testing.T) {
 			if scheme == nil {
diff --git a/sign/api/api.go b/sign/schemes/schemes.go
similarity index 61%
rename from sign/api/api.go
rename to sign/schemes/schemes.go
index 44cd2e90d..587435251 100644
--- a/sign/api/api.go
+++ b/sign/schemes/schemes.go
@@ -1,5 +1,5 @@
-// Package api contains a register of signature algorithms.
-package api
+// Package schemes contains a register of signature algorithms.
+package schemes
 
 import (
 	"github.com/cloudflare/circl/sign"
@@ -25,9 +25,9 @@ func init() {
 	}
 }
 
-// SchemeByName returns the scheme with the given name and nil if it is not
+// ByName returns the scheme with the given name and nil if it is not
 // supported.
-func SchemeByName(name string) sign.Scheme { return allSchemeNames[name] }
+func ByName(name string) sign.Scheme { return allSchemeNames[name] }
 
-// AllSchemes returns all signature schemes supported.
-func AllSchemes() []sign.Scheme { a := allSchemes; return a[:] }
+// All returns all signature schemes supported.
+func All() []sign.Scheme { a := allSchemes; return a[:] }
diff --git a/sign/api/api_test.go b/sign/schemes/schemes_test.go
similarity index 92%
rename from sign/api/api_test.go
rename to sign/schemes/schemes_test.go
index f041cd4fb..b311a23a7 100644
--- a/sign/api/api_test.go
+++ b/sign/schemes/schemes_test.go
@@ -1,15 +1,15 @@
-package api_test
+package schemes_test
 
 import (
 	"fmt"
 	"testing"
 
 	"github.com/cloudflare/circl/sign"
-	"github.com/cloudflare/circl/sign/api"
+	"github.com/cloudflare/circl/sign/schemes"
 )
 
 func TestApi(t *testing.T) {
-	allSchemes := api.AllSchemes()
+	allSchemes := schemes.All()
 	for _, scheme := range allSchemes {
 		scheme := scheme
 		t.Run(scheme.Name(), func(t *testing.T) {
@@ -86,7 +86,7 @@ func TestApi(t *testing.T) {
 				t.FailNow()
 			}
 
-			scheme2 := api.SchemeByName(scheme.Name())
+			scheme2 := schemes.ByName(scheme.Name())
 			if scheme2 == nil || scheme2 != scheme {
 				t.FailNow()
 			}
diff --git a/sign/sign.go b/sign/sign.go
index 56b6095ae..f16425493 100644
--- a/sign/sign.go
+++ b/sign/sign.go
@@ -1,4 +1,8 @@
 // Package sign provides unified interfaces for signature schemes.
+//
+// A register of schemes is available in the package
+//
+//  github.com/cloudflare/circl/sign/schemes
 package sign
 
 import (