diff --git a/README.md b/README.md
index c4e5ec8..348f8cc 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,64 @@
 # go-deepl
 
+Unofficial DeepL API client for Go.
+
+## Usage
+
+```go
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/candy12t/go-deepl"
+)
+
+func main() {
+	authkey := os.Getenv("DEEPL_AUTH_KEY")
+	client := deepl.NewClient(authkey)
+
+	translatetext, err := client.TranslateText(context.Background(), []string{"Hello world"}, "JA", deepl.TranslateOption{SourceLang: "EN"})
+	if err != nil {
+		log.Fatal(err)
+	}
+	b, err := json.Marshal(translatetext)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(string(b))
+}
+```
+
 ## References
 
 - [DeepL API](https://www.deepl.com/en/docs-api)
 
 ## APIs
 
-- [ ] translate text
-- [ ] translate documents
-- [ ] manage glossaries
-- [x] check usage and limits
-- [ ] retrieve supported languages
+### Translate Text
+
+- [x] POST /v2/translate
+
+### Translate Documents
+
+- [ ] POST /v2/document
+- [ ] POST /v2/document/{document_id}
+- [ ] POST /v2/document/{document_id}/result
+
+### Manage Glossaries
+
+- [x] GET /v2/glossary-language-pairs
+- [x] POST /v2/glossaries
+- [x] GET /v2/glossaries
+- [x] GET /v2/glossaries/{glossary_id}
+- [x] DELETE /v2/glossaries/{glossary_id}
+- [x] GET /v2/glossaries/{glossary_id}/entries
+
+### General
+
+- [x] GET /v2/usage
+- [x] GET /v2/languages