YangOpen

Connect it to your AI

Claude Code

claude mcp add --transport http yangopen https://yangopen.com/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://yangopen.com/mcp

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "yangopen": {
      "url": "https://yangopen.com/mcp"
    }
  }
}

Tools it offers

13 tools, as the server itself reported during our check on Oct 31, 2026.

• list_voicesThe YangOpen voices. tier "free" (default): sixteen free voices — two Vietnamese (Southern accent), American and British English, Mandarin, Japanese, Korean, Thai, French and Spanish. tier "plus": the paid voices, about
• text_to_speechTurn text into speech with a free YangOpen voice and get a link to the MP3. It costs no credit; it counts against the user's free daily allowance. Up to 3,000 characters per call: split longer text at sentence ends and c
• text_to_speech_plusTurn text into speech with a Plus voice and get a link to the MP3. Spends the user's prepaid YangOpen credit: 25 credits per 1,000 characters, rounded up to whole credits. The charge is made only when the MP3 is ready, a
• get_balanceThe user's YangOpen credit balance, what it buys (Plus voice characters, paid image runs), the prices, and where to top up. Changes nothing.
• get_upload_linkA one-time page where the user uploads a file for the tools that need one: a photo (JPEG, PNG or WebP) for the image tools and scan_document, or a Word file (.docx or .doc) for word_to_pdf, up to 25 MB. It gives the file
• remove_backgroundCut the main subject out of a photo and get a PNG with a transparent background. 5 free runs a day for each image tool, then 25 credits a run, charged only when the result is ready. Give the photo as file_id (the user up
• colorize_photoColour a black-and-white or toned (sepia) photo, with faces restored. A photo that already has colour comes back as it was and costs nothing. 5 free runs a day for each image tool, then 25 credits a run, charged only whe
• sharpen_imageMake a blurry, small or old photo sharp and larger (AI upscaling). It can also restore faces, and clean scratches and dust from an old print. 5 free runs a day for each image tool, then 25 credits a run, charged only whe
• expand_imageExtend a photo with AI-painted surroundings: to a new shape such as 16:9 (a cover), 9:16 (a phone story) or 1:1, or by a share of its size on the sides you choose. It never crops: the original pixels stay as they were. C
• scan_documentTurn a phone photo of a page (a document, a receipt, a page of a book) into a flat, straight scan: the page is found, cut out of the background and unbent, and comes back as a JPEG. 5 free runs a day for each image tool,
• word_to_pdfTurn a Word document (.docx or .doc, up to 25 MB) into a PDF with the layout Word gave it, on YangOpen's server. A few hundred pages take under half a minute; a much longer document may not finish. 5 free files a day, th
• convert_vietnamese_fontTurn Vietnamese text typed in the old fonts (TCVN3/ABC such as .VnTime, or VNI such as VNI-Times) into Unicode, so it reads right in any font: "Céng hßa x· héi chñ nghÜa" becomes "Cộng hòa xã hội chủ nghĩa". The old font
• convert_timeWhat a time in one place is in other places, with daylight saving applied for that date. Name zones the IANA way (Asia/Ho_Chi_Minh, America/New_York, Europe/London, Australia/Sydney) or UTC. Free.

Questions