YangOpen

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Design, images & audio

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://yangopen.com/mcp

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

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

{
  "servers": {
    "yangopen": {
      "type": "http",
      "url": "https://yangopen.com/mcp"
    }
  }
}

https://yangopen.com/mcp

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

• list_voices

  The 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 2,600 — 182 Vietnamese (Northern, Central and Southern), Eng

• text_to_speech

  Turn 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 call once per part. The link works for 24 hours; give it to t

• text_to_speech_plus

  Turn 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, and the answer states what was charged and the balance left.

• get_balance

  The 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_link

  A 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, Excel or PowerPoint file for word_to_pdf, excel_to_pdf or powerpoint_to_pdf, up to 25 MB. It gives the file_id to pass to them.

• remove_background

  Cut 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 uploads it through get_upload_link) or image_url. The result l

• colorize_photo

  Colour 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 when the result is ready. Give the photo as file_id (the user u

• sharpen_image

  Make 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 when the result is ready. Give the photo as file_id (the user u

• expand_image

  Extend 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. Can take up to a minute. 5 free runs a day for each image too

• scan_document

  Turn 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, then 25 credits a run, charged only when the result is read

• word_to_pdf

  Turn 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, then 25 credits a file, charged only when the PDF is ready. Gi

• excel_to_pdf

  Turn an Excel workbook (.xlsx or .xls, up to 25 MB) into a PDF on YangOpen's server, with each sheet on one page so a wide sheet is not cut. 5 free files a day, then 25 credits a file, charged only when the PDF is ready. Give the file as file_id (the user uploads it through get_u

• powerpoint_to_pdf

  Turn a PowerPoint presentation (.pptx or .ppt, up to 25 MB) into a PDF on YangOpen's server, one slide a page. 5 free files a day, then 25 credits a file, charged only when the PDF is ready. Give the file as file_id (the user uploads it through get_upload_link) or file_url. The P

• convert_vietnamese_font

  Turn 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 is guessed from the text unless you name it. Up to 5,000 ch

• convert_time

  What 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.

• number_to_words

  Write a number in Vietnamese and English words, for an invoice or a receipt: 1.250.000 becomes "một triệu hai trăm năm mươi nghìn" and "one million two hundred fifty thousand". A dot or comma before exactly three digits groups thousands (1.250, 12,500); before other digits it is

• count_text

  Count a text the way a writer does: words, characters with and without spaces, sentences, paragraphs, lines, and reading and speaking time. Vietnamese syllables count as words (the way Word counts them); a word is a run of letters and digits between spaces, so "e-mail", "COVID-19

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026

• ! Caution

  Maker matches the repo

  The registry lists no source repo, so we cannot match the publisher (yangopen.com) to the code

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 131 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 17 tool descriptions and found no hidden instructions to the AI

Compared with others in Design, images & audioi

• More stars than 0% of the other 2805 servers in this category
• Published to the registry more recently than 69% of the other 2805 servers in this category
• Basic checks equal to or better than 44% of the other 2805 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

No README found in the repo