diff --git a/router/router.go b/router/router.go
index 733133e..fdff51d 100644
--- a/router/router.go
+++ b/router/router.go
@@ -41,6 +41,51 @@ type Key struct {
 	CreatedAt string `json:"createdAt,omitempty"`
 }
 
+type ChatCompletionMessage struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+
+	// This property isn't in the official documentation, but it's in
+	// the documentation for the official library for python:
+	// - https://github.com/openai/openai-python/blob/main/chatml.md
+	// - https://github.com/openai/openai-cookbook/blob/main/examples/How_to_count_tokens_with_tiktoken.ipynb
+	Name string `json:"name,omitempty"`
+}
+
+type ChatCompletionRequest struct {
+	Model            string                  `json:"model"`
+	Messages         []ChatCompletionMessage `json:"messages"`
+	MaxTokens        int                     `json:"max_tokens,omitempty"`
+	Temperature      float32                 `json:"temperature,omitempty"`
+	TopP             float32                 `json:"top_p,omitempty"`
+	N                int                     `json:"n,omitempty"`
+	Stream           bool                    `json:"stream,omitempty"`
+	Stop             []string                `json:"stop,omitempty"`
+	PresencePenalty  float32                 `json:"presence_penalty,omitempty"`
+	FrequencyPenalty float32                 `json:"frequency_penalty,omitempty"`
+	LogitBias        map[string]int          `json:"logit_bias,omitempty"`
+	User             string                  `json:"user,omitempty"`
+}
+
+type ChatCompletionChoice struct {
+	Index        int                   `json:"index"`
+	Message      ChatCompletionMessage `json:"message"`
+	FinishReason string                `json:"finish_reason"`
+}
+
+type ChatCompletionResponse struct {
+	ID      string                 `json:"id"`
+	Object  string                 `json:"object"`
+	Created int64                  `json:"created"`
+	Model   string                 `json:"model"`
+	Choices []ChatCompletionChoice `json:"choices"`
+	Usage   struct {
+		PromptTokens     int `json:"prompt_tokens"`
+		CompletionTokens int `json:"completion_tokens"`
+		TotalTokens      int `json:"total_tokens"`
+	} `json:"usage"`
+}
+
 func AuthMiddleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		if rootToken == "" {