リクエストボディを[byte]型の配列にしてからInvoke-RestMethodコマンドレットで送信します。 $postText = @{text="日本語"} | ConvertTo-Json -Compress $postBody = [Text.Encoding]::UTF8.GetBytes($postText) $postUri = "http://localhost:3000/api/texts" Invoke-RestMethod -Method POST -Uri $postUri -Body $postBody -ContentType application/json
![PowerShellで日本語を含むJSONをPOST - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/fae045c5448b451849be6e32c965357a3a445067/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9UG93ZXJTaGVsbCVFMyU4MSVBNyVFNiU5NyVBNSVFNiU5QyVBQyVFOCVBQSU5RSVFMyU4MiU5MiVFNSU5MCVBQiVFMyU4MiU4MEpTT04lRTMlODIlOTJQT1NUJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmcz0yNmVjNWM1YmE3ZmQ3ODIxN2U4N2I3YjYwZWE2OTc1Nw%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBLYWtlaUFraWhpa28mdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPTg1YzRhOTAxNzIyOTIwMTNhY2JhNWViYjJmNjI5MTg0%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3D651e227c23fdd6454f6ed720a65b53e2)