diff --git a/cmd/api/api.go b/cmd/api/api.go
index cae531a..82018e8 100644
--- a/cmd/api/api.go
+++ b/cmd/api/api.go
@@ -7,16 +7,26 @@ import (
 	"io"
 	"net/url"
 	"os"
+	"regexp"
 	"strings"
 
 	"github.com/spf13/cobra"
 
 	"github.com/gitlink-org/gitlink-cli/cmd/cmdutil"
 	"github.com/gitlink-org/gitlink-cli/internal/client"
+	"github.com/gitlink-org/gitlink-cli/internal/context"
 	"github.com/gitlink-org/gitlink-cli/internal/i18n"
 	"github.com/gitlink-org/gitlink-cli/internal/output"
 )
 
+// apiOwnerPlaceholder and apiRepoPlaceholder match the REST-style :owner / :repo
+// path placeholders used throughout the GitLink API docs and shortcut commands.
+// The \b boundary keeps :owner/:repo from matching longer tokens like :owner_id.
+var (
+	apiOwnerPlaceholder = regexp.MustCompile(`:owner\b`)
+	apiRepoPlaceholder  = regexp.MustCompile(`:repo\b`)
+)
+
 func NewAPICmd(translators ...*i18n.Translator) *cobra.Command {
 	tr := i18n.Default()
 	if len(translators) > 0 && translators[0] != nil {
@@ -30,6 +40,8 @@ func NewAPICmd(translators ...*i18n.Translator) *cobra.Command {
   gitlink-cli api GET /projects --query 'page=1&limit=10'
   gitlink-cli api POST /:owner/:repo/issues --body '{"subject":"Bug","description":"..."}'
   gitlink-cli api POST /:owner/:repo/issues --body-file issue.json
+  gitlink-cli api GET /:owner/:repo/commits --owner Gitlink --repo gitlink-cli
+  gitlink-cli api GET /v1/{{owner}}/gitlink-cli/issues --var owner=Gitlink
   gitlink-cli api --batch-file plan.json --dry-run
   gitlink-cli api --batch-file plan.json --var owner=Gitlink --var repo=gitlink-cli`,
 		Args: validateAPIArgs,
@@ -67,10 +79,9 @@ func runAPI(c *cobra.Command, args []string) error {
 	}
 
 	method := strings.ToUpper(args[0])
-	path := args[1]
-
-	if !strings.HasPrefix(path, "/") {
-		path = "/" + path
+	path, err := resolveAPIPath(c, args[1])
+	if err != nil {
+		return err
 	}
 
 	cli, err := client.New()
@@ -107,6 +118,42 @@ func runAPI(c *cobra.Command, args []string) error {
 	return output.Print(env, resolveFormat())
 }
 
+// resolveAPIPath prepares a single-call path: it renders {{var}} templates
+// supplied via --var (consistent with batch mode), substitutes the REST-style
+// :owner / :repo placeholders (resolved from --owner/--repo or the git remote,
+// exactly like the shortcut commands), and ensures a leading slash.
+func resolveAPIPath(c *cobra.Command, rawPath string) (string, error) {
+	path := rawPath
+
+	overrides, err := parseBatchVars(c)
+	if err != nil {
+		return "", err
+	}
+	if len(overrides) > 0 {
+		rendered, rerr := renderTemplate(path, overrides)
+		if rerr != nil {
+			return "", rerr
+		}
+		path = rendered
+	}
+
+	if apiOwnerPlaceholder.MatchString(path) || apiRepoPlaceholder.MatchString(path) {
+		owner, repo, rerr := context.ResolveOwnerRepo(cmdutil.Owner, cmdutil.Repo)
+		if rerr != nil {
+			return "", fmt.Errorf("path contains :owner/:repo placeholders but they could not be resolved: %w", rerr)
+		}
+		// ReplaceAllLiteralString avoids interpreting $ in owner/repo as a
+		// regexp replacement reference.
+		path = apiOwnerPlaceholder.ReplaceAllLiteralString(path, owner)
+		path = apiRepoPlaceholder.ReplaceAllLiteralString(path, repo)
+	}
+
+	if !strings.HasPrefix(path, "/") {
+		path = "/" + path
+	}
+	return path, nil
+}
+
 func readJSONBody(c *cobra.Command) (interface{}, error) {
 	bodyStr, _ := c.Flags().GetString("body")
 	bodyFile, _ := c.Flags().GetString("body-file")
diff --git a/cmd/api/api_test.go b/cmd/api/api_test.go
index dad41a8..eef0771 100644
--- a/cmd/api/api_test.go
+++ b/cmd/api/api_test.go
@@ -202,6 +202,56 @@ func TestRunAPINoPrefix(t *testing.T) {
 	}
 }
 
+func TestRunAPIResolvesOwnerRepoPlaceholders(t *testing.T) {
+	setupAPITest(t, func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/testowner/testrepo/commits.json" {
+			t.Fatalf("unexpected path: %s", r.URL.Path)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]interface{}{"ok": true})
+	})
+	cmdutil.Format = "json"
+	cmdutil.Owner, cmdutil.Repo = "testowner", "testrepo"
+	defer func() { cmdutil.Owner, cmdutil.Repo = "", "" }()
+
+	cmd := NewAPICmd()
+	cmd.SetArgs([]string{"GET", "/:owner/:repo/commits"})
+	if err := cmd.Execute(); err != nil {
+		t.Fatalf("runAPI :owner/:repo error: %v", err)
+	}
+}
+
+func TestRunAPIRendersVarTemplateSingleCall(t *testing.T) {
+	setupAPITest(t, func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/Mengz/gitlink-cli/issues.json" {
+			t.Fatalf("unexpected path: %s", r.URL.Path)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]interface{}{"ok": true})
+	})
+	cmdutil.Format = "json"
+	cmdutil.Owner, cmdutil.Repo = "", ""
+
+	cmd := NewAPICmd()
+	cmd.SetArgs([]string{"GET", "/v1/{{owner}}/gitlink-cli/issues", "--var", "owner=Mengz"})
+	if err := cmd.Execute(); err != nil {
+		t.Fatalf("runAPI --var single call error: %v", err)
+	}
+}
+
+func TestRunAPIMissingVarTemplateSingleCall(t *testing.T) {
+	setupAPITest(t, func(w http.ResponseWriter, r *http.Request) {
+		t.Fatal("should not reach server")
+	})
+	cmdutil.Format = "json"
+
+	cmd := NewAPICmd()
+	cmd.SetArgs([]string{"GET", "/{{missing}}", "--var", "present=1"})
+	if err := cmd.Execute(); err == nil {
+		t.Fatal("expected error for missing template variable")
+	}
+}
+
 func TestRenderBatchRequestsTemplateVars(t *testing.T) {
 	requests, err := renderBatchRequests([]batchRequest{
 		{
diff --git a/doc/changes/api-path-placeholders.md b/doc/changes/api-path-placeholders.md
new file mode 100644
index 0000000..3f5b870
--- /dev/null
+++ b/doc/changes/api-path-placeholders.md
@@ -0,0 +1,38 @@
+# 修复 `api` 命令单次调用不替换 `:owner/:repo` 占位符
+
+## 背景
+
+`gitlink-cli api <METHOD> <PATH>` 单次调用此前直接把 `<PATH>` 原样发送给服务端，**不会替换 REST 风格的 `:owner` / `:repo` 占位符**。这导致：
+
+- 该命令自身的帮助 `Example`（如 `api POST /:owner/:repo/issues`）跑不通；
+- 依赖 `:owner/:repo` 写法的 Skill / 文档（如 `api GET /:owner/:repo/commits`）报错；
+- 占位符替换能力此前只存在于 `--batch-file` 批处理模式的 `{{var}}` 模板中，单次调用无法复用。
+
+对应 Issue：`bug: api 命令单次调用不替换 :owner/:repo 占位符（0.2.0）`。
+
+## 变更
+
+`api` 单次调用现在按以下顺序处理路径：
+
+1. **`{{var}}` 模板渲染**：若提供了 `--var key=value`，复用与批处理模式相同的模板引擎渲染 `<PATH>` 中的 `{{key}}`，缺失变量时报错。
+2. **`:owner` / `:repo` 占位符替换**：当路径包含 `:owner` / `:repo` 时，使用与所有 shortcut 一致的解析逻辑 `context.ResolveOwnerRepo(--owner, --repo → git remote origin)` 解析仓库归属并替换；无法解析时给出明确错误提示。
+3. 保持原有的「缺失前导 `/` 自动补全」行为。
+
+不含占位符、且未传 `--var` 的调用（如 `api GET /users/me`）行为完全不变。
+
+## 示例
+
+```bash
+# 自动从当前 git 仓库或 --owner/--repo 解析
+gitlink-cli api GET /:owner/:repo/commits --owner Gitlink --repo gitlink-cli
+
+# 单次调用也支持 {{var}} 模板
+gitlink-cli api GET /v1/{{owner}}/gitlink-cli/issues --var owner=Gitlink
+```
+
+## 实现与测试
+
+- 改动集中在 `cmd/api/api.go`：新增 `resolveAPIPath` 辅助函数与 `:owner` / `:repo` 占位符正则（`\b` 边界避免误伤 `:owner_id` 等更长 token；`ReplaceAllLiteralString` 避免 `$` 被当作正则替换引用）。
+- 复用既有 `parseBatchVars` / `renderTemplate`（`cmd/api/batch.go`）与 `internal/context.ResolveOwnerRepo`，无新增依赖。
+- 更新命令 `Example` 帮助文案。
+- 新增单元测试：`:owner/:repo` 解析替换、单次调用 `{{var}}` 渲染、缺失模板变量报错；既有测试全部通过。