BaZi (Four Pillars) calculation from birth date, time, and location via public remote MCP.
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Calculates a BaZi (Four Pillars of Destiny, 八字, 四柱推命, Saju) chart from a birth date, time and place with the InsightBaZi engine, and shows it as a chart card. Use it when the user asks for a BaZi chart, or for their Four Pillars, Day Master, Ten Gods, element balance or 10-year luck pillars to be worked out from a birth date. It applies true solar time from the birthplace longitude and historical daylight-saving rules, changes the Day Pillar at 23:00, the year at Lichun and months at solar terms. The chart card is the user-facing result. After a chart-only request, briefly confirm it is ready; do not duplicate its chart, tables or element breakdown. Interpret the structured result only if requested, or provide a text chart if explicitly requested.
IANA time zone of the birthplace, for example Asia/Bangkok or America/New_York.
Birth date in the Gregorian calendar, YYYY-MM-DD.
Needed only for the 10-year luck pillars, whose direction depends on it.
Language for chart labels. Use the closest match to the user's language; use en when none matches.
Longitude of the birth city in decimal degrees, east positive, used only for the true-solar-time correction. Give the city's longitude when the birth city is known; never the user's current location.
Clock time on the birth record, 24-hour HH:MM, exactly as recorded (do not adjust for daylight saving). Omit when the user does not know it.
Birth city as the user gave it, shown on the card. This is the place of birth, never the user's current location.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http bazi https://www.insightbazi.com/api/mcp
Calculates a BaZi (Four Pillars of Destiny, 八字, 四柱推命, Saju) chart from a birth date, time and place with the InsightBaZi engine, and shows it as a chart card. Use it when the user asks for a BaZi chart, or for their Four Pillars, Day Master, Ten Gods, element balance or 10-year luck pillars to be worked out from a birth date. It applies true solar time from the birthplace longitude and historical daylight-saving rules, changes the Day Pillar at 23:00, the year at Lichun and months at solar terms. The chart card is the user-facing result. After a chart-only request, briefly confirm it is ready; do not duplicate its chart, tables or element breakdown. Interpret the structured result only if requested, or provide a text chart if explicitly requested.
| Argument | Type | Description |
|---|---|---|
| gender | string | Needed only for the 10-year luck pillars, whose direction depends on it. |
| language | string | Language for chart labels. Use the closest match to the user's language; use en when none matches. |
| timezone* | string | IANA time zone of the birthplace, for example Asia/Bangkok or America/New_York. |
| longitude | number | Longitude of the birth city in decimal degrees, east positive, used only for the true-solar-time correction. Give the city's longitude when the birth city is known; never the user's current location. |
| birth_date* | string | Birth date in the Gregorian calendar, YYYY-MM-DD. |
| birth_time | string | Clock time on the birth record, 24-hour HH:MM, exactly as recorded (do not adjust for daylight saving). Omit when the user does not know it. |
| birthplace | string | Birth city as the user gave it, shown on the card. This is the place of birth, never the user's current location. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"birth_date",
"timezone"
],
"properties": {
"gender": {
"enum": [
"male",
"female"
],
"type": "string",
"description": "Needed only for the 10-year luck pillars, whose direction depends on it."
},
"language": {
"enum": [
"en",
"zh",
"zh-hant",
"ja",
"ko",
"th",
"id",
"es",
"pt",
"fr"
],
"type": "string",
"default": "en",
"description": "Language for chart labels. Use the closest match to the user's language; use en when none matches."
},
"timezone": {
"type": "string",
"description": "IANA time zone of the birthplace, for example Asia/Bangkok or America/New_York."
},
"longitude": {
"type": "number",
"maximum": 180,
"minimum": -180,
"description": "Longitude of the birth city in decimal degrees, east positive, used only for the true-solar-time correction. Give the city's longitude when the birth city is known; never the user's current location."
},
"birth_date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"description": "Birth date in the Gregorian calendar, YYYY-MM-DD."
},
"birth_time": {
"type": "string",
"pattern": "^([01]\\d|2[0-3]):[0-5]\\d$",
"description": "Clock time on the birth record, 24-hour HH:MM, exactly as recorded (do not adjust for daylight saving). Omit when the user does not know it."
},
"birthplace": {
"type": "string",
"maxLength": 120,
"description": "Birth city as the user gave it, shown on the card. This is the place of birth, never the user's current location."
}
}
}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.