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Vietnamese Tử Vi charts, lunar calendar, good-day finder and age compatibility. Free, no sign-in.
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check_age_compatibility Read-only
Compares two people by birth year and gender using Vietnamese age-matching (nạp âm element, heavenly stem, earthly branch, Bát Trạch cung phi, zodiac animal) and returns a score out of 100 with each factor explained.
Install
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http tuvi https://lstuvi.com/mcp
Tools (10)
check_age_compatibilityCompares two people by birth year and gender using Vietnamese age-matching (nạp âm element, heavenly stem, earthly branch, Bát Trạch cung phi, zodiac animal) and returns a score out of 100 with each factor explained.
read-only
check_age_compatibility
Compares two people by birth year and gender using Vietnamese age-matching (nạp âm element, heavenly stem, earthly branch, Bát Trạch cung phi, zodiac animal) and returns a score out of 100 with each factor explained.
| Argument | Type | Description |
|---|---|---|
| person1* | object | |
| person2* | object |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"person1",
"person2"
],
"properties": {
"person1": {
"type": "object",
"required": [
"birth_year",
"gender"
],
"properties": {
"name": {
"type": "string",
"maxLength": 40
},
"gender": {
"enum": [
"nam",
"nu"
],
"type": "string",
"description": "\"nam\" = male, \"nu\" = female"
},
"birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920
}
}
},
"person2": {
"type": "object",
"required": [
"birth_year",
"gender"
],
"properties": {
"name": {
"type": "string",
"maxLength": 40
},
"gender": {
"enum": [
"nam",
"nu"
],
"type": "string",
"description": "\"nam\" = male, \"nu\" = female"
},
"birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920
}
}
}
}
}convert_lunar_solarConverts a date between the Gregorian calendar and the Vietnamese lunar calendar (with leap months, 1900–2100), and gives the can chi of the day, month and year plus the solar term.
read-only
convert_lunar_solar
Converts a date between the Gregorian calendar and the Vietnamese lunar calendar (with leap months, 1900–2100), and gives the can chi of the day, month and year plus the solar term.
| Argument | Type | Description |
|---|---|---|
| date* | string | YYYY-MM-DD; for lunar_to_solar this is the lunar year, month and day |
| direction* | string | |
| leap_month | boolean | lunar_to_solar only: true if the lunar month is a leap month |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"direction",
"date"
],
"properties": {
"date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "YYYY-MM-DD; for lunar_to_solar this is the lunar year, month and day"
},
"direction": {
"enum": [
"solar_to_lunar",
"lunar_to_solar"
],
"type": "string"
},
"leap_month": {
"type": "boolean",
"description": "lunar_to_solar only: true if the lunar month is a leap month"
}
}
}create_tuvi_chartBuilds a Vietnamese Tử Vi Đẩu Số (Purple Star) birth chart from Gregorian birth date, birth time and gender: lunar date, can chi, nạp âm, cục, the 12 palaces with their stars, and a short rule-based reading of each palace. Use when the user wants their Tử Vi chart or asks what their chart says.
read-only
create_tuvi_chart
Builds a Vietnamese Tử Vi Đẩu Số (Purple Star) birth chart from Gregorian birth date, birth time and gender: lunar date, can chi, nạp âm, cục, the 12 palaces with their stars, and a short rule-based reading of each palace. Use when the user wants their Tử Vi chart or asks what their chart says.
| Argument | Type | Description |
|---|---|---|
| name | string | |
| gender* | string | "nam" = male, "nu" = female |
| view_year | integer | Gregorian year to read the yearly luck for; default is the current year |
| birth_date* | string | Gregorian birth date, YYYY-MM-DD |
| birth_time* | string | Local clock time of birth in Vietnam time, HH:MM 24-hour. Use 12:00 if unknown and say so. |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"birth_date",
"birth_time",
"gender"
],
"properties": {
"name": {
"type": "string",
"maxLength": 60
},
"gender": {
"enum": [
"nam",
"nu"
],
"type": "string",
"description": "\"nam\" = male, \"nu\" = female"
},
"view_year": {
"type": "integer",
"maximum": 2200,
"minimum": 1900,
"description": "Gregorian year to read the yearly luck for; default is the current year"
},
"birth_date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Gregorian birth date, YYYY-MM-DD"
},
"birth_time": {
"type": "string",
"pattern": "^([01]?\\d|2[0-3]):[0-5]\\d$",
"description": "Local clock time of birth in Vietnam time, HH:MM 24-hour. Use 12:00 if unknown and say so."
}
}
}find_compatible_birth_yearsFor one person's birth year and gender, scores every partner birth year within a range by the same Vietnamese age-matching rules and returns the best and worst matching years.
read-only
find_compatible_birth_years
For one person's birth year and gender, scores every partner birth year within a range by the same Vietnamese age-matching rules and returns the best and worst matching years.
| Argument | Type | Description |
|---|---|---|
| range | integer | years around the birth year to scan, default 10 |
| gender* | string | "nam" = male, "nu" = female |
| birth_year* | integer | |
| partner_gender | string | default: the opposite gender |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"birth_year",
"gender"
],
"properties": {
"range": {
"type": "integer",
"maximum": 30,
"minimum": 1,
"description": "years around the birth year to scan, default 10"
},
"gender": {
"enum": [
"nam",
"nu"
],
"type": "string",
"description": "\"nam\" = male, \"nu\" = female"
},
"birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920
},
"partner_gender": {
"enum": [
"nam",
"nu"
],
"type": "string",
"description": "default: the opposite gender"
}
}
}find_good_daysRanks the days of one Gregorian month for an activity (wedding, opening a shop, moving house, signing a contract, travel…) by Vietnamese day-selection rules, optionally checked against the birth years of the people involved. Returns the best days with reasons and good hours, and the days to avoid.
read-only
find_good_days
Ranks the days of one Gregorian month for an activity (wedding, opening a shop, moving house, signing a contract, travel…) by Vietnamese day-selection rules, optionally checked against the birth years of the people involved. Returns the best days with reasons and good hours, and the days to avoid.
| Argument | Type | Description |
|---|---|---|
| year* | integer | Gregorian year |
| month* | integer | Gregorian month |
| activity* | string | Activity: viec-chung = Việc chung; cuoi-hoi = Cưới hỏi; an-hoi = Ăn hỏi; khai-truong = Khai trương; nhap-trach = Nhập trạch, chuyển nhà; dong-tho = Động thổ; lam-nha = Làm nhà, sửa nhà; mua-xe = Mua xe; ky-hop-dong = Ký hợp đồng; xuat-hanh = Xuất hành |
| birth_year | integer | Birth year of the person doing it (for weddings: the bride) |
| partner_birth_year | integer | Weddings and engagements only: birth year of the groom |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"activity",
"month",
"year"
],
"properties": {
"year": {
"type": "integer",
"maximum": 2100,
"minimum": 1900,
"description": "Gregorian year"
},
"month": {
"type": "integer",
"maximum": 12,
"minimum": 1,
"description": "Gregorian month"
},
"activity": {
"enum": [
"viec-chung",
"cuoi-hoi",
"an-hoi",
"khai-truong",
"nhap-trach",
"dong-tho",
"lam-nha",
"mua-xe",
"ky-hop-dong",
"xuat-hanh"
],
"type": "string",
"description": "Activity: viec-chung = Việc chung; cuoi-hoi = Cưới hỏi; an-hoi = Ăn hỏi; khai-truong = Khai trương; nhap-trach = Nhập trạch, chuyển nhà; dong-tho = Động thổ; lam-nha = Làm nhà, sửa nhà; mua-xe = Mua xe; ky-hop-dong = Ký hợp đồng; xuat-hanh = Xuất hành"
},
"birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920,
"description": "Birth year of the person doing it (for weddings: the bride)"
},
"partner_birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920,
"description": "Weddings and engagements only: birth year of the groom"
}
}
}get_2027_forecast_by_birth_yearReturns the traditional facts for a birth year in the lunar year 2027 (Đinh Mùi): age, relation of the birth branch and stem with the year, element relation, Tam Tai, Kim Lâu, and the yearly palace for men and women.
read-only
get_2027_forecast_by_birth_year
Returns the traditional facts for a birth year in the lunar year 2027 (Đinh Mùi): age, relation of the birth branch and stem with the year, element relation, Tam Tai, Kim Lâu, and the yearly palace for men and women.
| Argument | Type | Description |
|---|---|---|
| birth_year* | integer | Gregorian birth year (the person's lunar year of birth) |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"birth_year"
],
"properties": {
"birth_year": {
"type": "integer",
"maximum": 2100,
"minimum": 1920,
"description": "Gregorian birth year (the person's lunar year of birth)"
}
}
}get_articleReturns the summary of one lstuvi.com article by slug (from search_articles): the short answer, key points and FAQ, or the opening of the article.
read-only
get_article
Returns the summary of one lstuvi.com article by slug (from search_articles): the short answer, key points and FAQ, or the opening of the article.
| Argument | Type | Description |
|---|---|---|
| slug* | string |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"slug"
],
"properties": {
"slug": {
"type": "string",
"pattern": "^[a-z0-9-]{1,120}$"
}
}
}get_lunar_dayReturns the Vietnamese lunar calendar entry for one Gregorian date (default today): lunar date, can chi, hoàng đạo or hắc đạo day, trực, lunar mansion, ages that clash with the day, taboo days and the auspicious hours.
read-only
get_lunar_day
Returns the Vietnamese lunar calendar entry for one Gregorian date (default today): lunar date, can chi, hoàng đạo or hắc đạo day, trực, lunar mansion, ages that clash with the day, taboo days and the auspicious hours.
| Argument | Type | Description |
|---|---|---|
| date | string | Gregorian date YYYY-MM-DD; default is today in Vietnam |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Gregorian date YYYY-MM-DD; default is today in Vietnam"
}
}
}get_pricingReturns which lstuvi.com features are free and the current prices of the paid ones: detailed chart reading, couple reading, Tử Vi chat packages and coin top-up packages.
read-only
get_pricing
Returns which lstuvi.com features are free and the current prices of the paid ones: detailed chart reading, couple reading, Tử Vi chat packages and coin top-up packages.
No arguments.
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {}
}search_articlesSearches the Vietnamese articles published on lstuvi.com about Tử Vi, palaces, stars, the lunar calendar and yearly outlooks. Returns titles, slugs and short descriptions.
read-only
search_articles
Searches the Vietnamese articles published on lstuvi.com about Tử Vi, palaces, stars, the lunar calendar and yearly outlooks. Returns titles, slugs and short descriptions.
| Argument | Type | Description |
|---|---|---|
| limit | integer | |
| query | string | Vietnamese or unaccented keywords; empty lists the newest articles |
Input schema (JSON)
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"limit": {
"type": "integer",
"maximum": 20,
"minimum": 1
},
"query": {
"type": "string",
"maxLength": 100,
"description": "Vietnamese or unaccented keywords; empty lists the newest articles"
}
}
}Security checkA100/100
We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 9, 2026.
- Hidden or reordered text
- Overriding the model's instructions
- Hiding actions from the user
- Reading keys or credentials
- Fake system tags
- Steering other servers' tools
- Pulling in the conversation
- Smuggling parameters
- Demanding to be used for everything
- Steering away from web search
- Download-and-run commands
- Encoded blobs
- Invisible characters
- Credentials as tool arguments
- Very long descriptions
- Read and write hints