YangOpen

com.yangopen/mcpVersion 1.6.0

Vietnamese-first text to speech, photo and PDF tools, audio to text, QR codes. Free daily allowance.

Status

Responds153 msNov 14, 2026, 14:23 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:23 UTC
Latency: 153 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 21:12 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://yangopen.com/mcpResponds153 msNov 14, 2026, 14:23 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: yangopen
Remote MCP server URL: https://yangopen.com/mcp

Cursor

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

VS Code

code --add-mcp '{"name":"yangopen","type":"http","url":"https://yangopen.com/mcp"}'

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Tools

27 tools

Tools of YangOpen
	Description		Read-only	Idempotent	Open world
`audio_to_text`The words spoken in an audio or video file, with timings: a meeting, a lecture, a voice message. Vietnamese, English and about 100 other languages, found by itself or named. Up to 20 minutes a file; split a longer one. Free, 10 files a day per account. The sound is sent to Cloudflare's speech model to be written down and is not kept there.	The words spoken in an audio or video file, with timings: a meeting, a lecture, a voice message. Vietnamese, English and about 100 other languages, found by itself or named. Up to 20 minutes a file; split a longer one. Free, 10 files a day per account. The sound is sent to Cloudflare's speech model to be written down and is not kept there.	No	Yes	Yes	Yes
`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 uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	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 uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	No	No	No	Yes
`compress_image`Shrink a picture's file size, keeping its pixel size. Optionally change it to JPEG or WebP, which are smaller than PNG for photos. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Shrink a picture's file size, keeping its pixel size. Optionally change it to JPEG or WebP, which are smaller than PNG for photos. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`compress_pdf`Shrink a PDF, mostly by resizing its pictures. low keeps print quality, medium (default) suits the screen and email, high is smallest. A PDF that cannot get smaller comes back unchanged. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Shrink a PDF, mostly by resizing its pictures. low keeps print quality, medium (default) suits the screen and email, high is smallest. A PDF that cannot get smaller comes back unchanged. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`convert_currency`Convert an amount between currencies at today's market rate (updated daily), and for the Vietnamese đồng also Vietcombank's buy and sell prices. ISO codes like USD, EUR, JPY, CNY, KRW. Free.	Convert an amount between currencies at today's market rate (updated daily), and for the Vietnamese đồng also Vietcombank's buy and sell prices. ISO codes like USD, EUR, JPY, CNY, KRW. Free.	No	Yes	Yes	Yes
`convert_image`Change a picture to JPEG, PNG or WebP: an iPhone HEIC photo to JPG, a PNG to WebP, a TIFF or BMP to PNG. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Change a picture to JPEG, PNG or WebP: an iPhone HEIC photo to JPG, a PNG to WebP, a TIFF or BMP to PNG. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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.	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.	No	Yes	Yes	No
`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 characters a call. Free. For a whole Word or Excel file, send the user to https://yangopen.com/vi/tools/font-to-unicode/.	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 characters a call. Free. For a whole Word or Excel file, send the user to https://yangopen.com/vi/tools/font-to-unicode/.	No	Yes	Yes	No
`delete_pdf_pages`The PDF without the pages named. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	The PDF without the pages named. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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 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 link works for 24 hours; give it to the user exactly as returned.	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 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 link works for 24 hours; give it to the user exactly as returned.	No	No	No	Yes
`extract_pdf_pages`A new PDF with only the pages chosen, in the order written: split a PDF, or reorder its pages. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	A new PDF with only the pages chosen, in the order written: split a PDF, or reorder its pages. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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.	The user's YangOpen credit balance, what it buys (Plus voice characters, paid image runs), the prices, and where to top up. Changes nothing.	Not declared	Yes	Not declared	No
`get_upload_link`A one-time page where the user uploads the file a tool needs: a photo, another picture, a PDF or a recording, up to 25 MB each. They may choose several at once (up to 20, for merge_pdf or images_to_pdf); they arrive in the order chosen. It gives the file_id to pass to the tools. You cannot hand over a file from this chat yourself: give the user the link, ask them to open it and choose the file, and continue when they say it is done. In a client that can run shell commands (Claude Code), upload a local file yourself with the upload_command. The link works for 1 hour; the file is kept for 24 hours. Free.	A one-time page where the user uploads the file a tool needs: a photo, another picture, a PDF or a recording, up to 25 MB each. They may choose several at once (up to 20, for merge_pdf or images_to_pdf); they arrive in the order chosen. It gives the file_id to pass to the tools. You cannot hand over a file from this chat yourself: give the user the link, ask them to open it and choose the file, and continue when they say it is done. In a client that can run shell commands (Claude Code), upload a local file yourself with the upload_command. The link works for 1 hour; the file is kept for 24 hours. Free.	No	No	No	No
`images_to_pdf`Make one PDF from 1 to 20 pictures, one per page, in the order given. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Make one PDF from 1 to 20 pictures, one per page, in the order given. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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), English, Spanish, Mandarin, French, Japanese and Korean; search them by language, gender and words in the name or style. Returns the id to pass to text_to_speech (free) or text_to_speech_plus (plus).	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), English, Spanish, Mandarin, French, Japanese and Korean; search them by language, gender and words in the name or style. Returns the id to pass to text_to_speech (free) or text_to_speech_plus (plus).	Not declared	Yes	Not declared	No
`make_qr_code`A QR code picture (PNG) for a link, text, phone number or Wi-Fi login (WIFI:T:WPA;S:name;P:password;;). Free, with a daily limit per account. The link works for 24 hours.	A QR code picture (PNG) for a link, text, phone number or Wi-Fi login (WIFI:T:WPA;S:name;P:password;;). Free, with a daily limit per account. The link works for 24 hours.	No	No	Yes	Yes
`merge_pdf`Join 2 to 20 PDFs into one, in the order given. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Join 2 to 20 PDFs into one, in the order given. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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 the decimal mark (12,5 or 2.75). Free; the Vietnamese money line is included.	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 the decimal mark (12,5 or 2.75). Free; the Vietnamese money line is included.	No	Yes	Yes	No
`pdf_to_images`Each page as a PNG or JPEG picture. One page gives a picture; several give a ZIP of them. Up to 30 pages a call. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Each page as a PNG or JPEG picture. One page gives a picture; several give a ZIP of them. Up to 30 pages a call. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`read_qr_code`The text of every QR code and barcode (EAN, UPC, Code 128…) found in a photo or screenshot. Free, with a daily limit per account.	The text of every QR code and barcode (EAN, UPC, Code 128…) found in a photo or screenshot. Free, with a daily limit per account.	No	Yes	Yes	Yes
`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 link works for 24 hours; give it to the user exactly as returned.	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 link works for 24 hours; give it to the user exactly as returned.	No	No	No	Yes
`resize_image`Change a picture's pixel size: by percent, or to a width and/or height (the shape kept unless fit is exact or cover). Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Change a picture's pixel size: by percent, or to a width and/or height (the shape kept unless fit is exact or cover). Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`rotate_pdf`Turn every page, or the pages named, clockwise by 90, 180 or 270 degrees. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	Turn every page, or the pages named, clockwise by 90, 180 or 270 degrees. Free, with a daily limit per account. Give the file through get_upload_link (file_id) or a public link. The result link works for 24 hours; give it to the user exactly as returned.	No	No	Yes	Yes
`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 ready. Give the photo as file_id (the user uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	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 ready. Give the photo as file_id (the user uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	No	No	No	Yes
`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 uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	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 uploads it through get_upload_link) or image_url. The result link works for 24 hours; give it to the user exactly as returned.	No	No	No	Yes
`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 the user exactly as returned. The text is sent to an outside speech service to be read; it is not stored.	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 the user exactly as returned. The text is sent to an outside speech service to be read; it is not stored.	No	No	No	Yes
`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. Up to 1,000 characters per call for Vietnamese voices and 400 for the other languages; split longer text at sentence ends. Before a long job, tell the user the cost (characters ÷ 1,000 × 25 credits) and check get_balance. The link works for 24 hours; give it to the user exactly as returned.	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. Up to 1,000 characters per call for Vietnamese voices and 400 for the other languages; split longer text at sentence ends. Before a long job, tell the user the cost (characters ÷ 1,000 × 25 credits) and check get_balance. The link works for 24 hours; give it to the user exactly as returned.	No	No	No	No

Details

Registry status: Active
Published: Nov 13, 2026
Updated: Nov 13, 2026
Website: https://yangopen.com/#ai-assistant⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Design and mediaSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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