{"success":true,"version":"v1","request":{"tool":"list_calculators","category":"yijing"},"result":{"entity_type":"calculator_list","status":"completed","count":11,"calculators":[{"calculator_id":"bagua","entity_type":"calculator","name":"Bagua Trigram Lookup (八卦)","category":"yijing","tool_name":"lookup_bagua_trigram","description":"Looks up one of the eight trigrams (八卦, bagua) and returns its lines, Fuxi (先天, xiantian) and Luoshu (洛书, later-heaven) numbers, directions in both arrangements, element, yin/yang, family member, body part, animal, attribute and season, plus a table of all eight.","use_when":"You need the structured attributes of a trigram (乾 兑 离 震 巽 坎 艮 坤) or the whole eight-trigram table, e.g. to build or explain a hexagram, a compass arrangement or a feng shui reference.","do_not_use_when":"You need a six-line hexagram (use hexagram-lookup), a person's Ming Gua trigram from a birth year (use ming-gua) or the Luoshu magic square (use luoshu-square).","required_inputs":["trigram"],"optional_inputs":[],"urls":{"html":"https://tttkmbb.com/yijing/bagua","markdown":"https://tttkmbb.com/yijing/bagua.md","schema":"https://tttkmbb.com/api/v1/calculators/bagua","api":"https://tttkmbb.com/api/v1/calculate/bagua"}},{"calculator_id":"hexagram-lookup","entity_type":"calculator","name":"I Ching Hexagram Lookup (六十四卦)","category":"yijing","tool_name":"lookup_iching_hexagram","description":"Identifies one of the 64 hexagrams (六十四卦, liushisi gua) from its King Wen number, name, two trigrams or line digits and returns its lines, trigrams, nuclear (互卦, hugua), inverse (综卦, zonggua) and opposite (错卦, cuogua) hexagrams, its Jing Fang palace (京房八宫, Jingfang bagong) with 世/应 (shi/ying) lines, and the received judgment text (卦辞, guaci).","use_when":"You need to identify or describe a hexagram, convert between its number, name, trigram pair and line pattern, or find its derived hexagrams and palace position.","do_not_use_when":"You have moving lines and need the changed hexagram and reading rule (use hexagram-change), or you need to cast a hexagram from a date or numbers (use meihua-yishu).","required_inputs":[],"optional_inputs":["king_wen_number","name","upper_trigram","lower_trigram","lines"],"urls":{"html":"https://tttkmbb.com/yijing/hexagram-lookup","markdown":"https://tttkmbb.com/yijing/hexagram-lookup.md","schema":"https://tttkmbb.com/api/v1/calculators/hexagram-lookup","api":"https://tttkmbb.com/api/v1/calculate/hexagram-lookup"}},{"calculator_id":"hexagram-change","entity_type":"calculator","name":"Hexagram Change Calculator (变卦)","category":"yijing","tool_name":"calculate_hexagram_change","description":"Applies moving lines (动爻, dongyao) to a hexagram and returns the changed hexagram (之卦, zhigua), the nuclear hexagrams of both, the line titles of the moving lines and which text to read according to the traditional rule attributed to Zhu Xi (朱熹).","use_when":"You have a cast hexagram with one or more moving lines (from coins, yarrow stalks, Plum Blossom or Liu Yao) and need the resulting hexagram and the reading convention.","do_not_use_when":"You only need to identify a hexagram without moving lines (use hexagram-lookup) or you need to cast the hexagram itself (use meihua-yishu or liuyao).","required_inputs":["hexagram"],"optional_inputs":["moving_lines"],"urls":{"html":"https://tttkmbb.com/yijing/hexagram-change","markdown":"https://tttkmbb.com/yijing/hexagram-change.md","schema":"https://tttkmbb.com/api/v1/calculators/hexagram-change","api":"https://tttkmbb.com/api/v1/calculate/hexagram-change"}},{"calculator_id":"five-elements","entity_type":"calculator","name":"Five Elements Relation (五行生克)","category":"yijing","tool_name":"analyze_five_element_relation","description":"Determines the Wuxing (五行) relation between two elements — generating (相生, xiangsheng), controlling (相克, xiangke) or same — and returns the full generating and controlling cycles plus the traditional correspondence profile of each element (direction, season, colour, planet, organs, taste, emotion, climate, Hetu numbers, stems, branches, trigrams).","use_when":"You need to know how two of Wood, Fire, Earth, Metal and Water relate in the five-element cycles, or the classical correspondences of an element, e.g. when interpreting stems, branches, trigrams or a Bazi chart.","do_not_use_when":"You need relations between specific stems and branches such as 六合 or 三合 (use stem-branch-relations) or trigram attributes (use bagua).","required_inputs":["element_a","element_b"],"optional_inputs":[],"urls":{"html":"https://tttkmbb.com/yijing/five-elements","markdown":"https://tttkmbb.com/yijing/five-elements.md","schema":"https://tttkmbb.com/api/v1/calculators/five-elements","api":"https://tttkmbb.com/api/v1/calculate/five-elements"}},{"calculator_id":"stem-branch-relations","entity_type":"calculator","name":"Stem and Branch Relations (干支合冲刑害)","category":"yijing","tool_name":"analyze_stem_branch_relations","description":"Finds the traditional relations among a set of heavenly stems (天干, tiangan) and earthly branches (地支, dizhi): stem combinations (五合, wuhe) and clashes (相冲, xiangchong), branch six-combinations (六合, liuhe), three-harmony frames (三合局, sanheju, incl. 半合 banhe), directional combinations (三会, sanhui), clashes (六冲, liuchong), harms (六害, liuhai), punishments (相刑 xiangxing, 自刑 zixing) and destructions (相破, xiangpo).","use_when":"You have stems or branches from a Bazi chart, a date or a Liu Yao chart and need to list which of them combine, clash, harm or punish each other.","do_not_use_when":"You need the abstract five-element relation between two elements (use five-elements) or the stems and branches of a date (use sexagenary-cycle or bazi-four-pillars).","required_inputs":["characters"],"optional_inputs":[],"urls":{"html":"https://tttkmbb.com/yijing/stem-branch-relations","markdown":"https://tttkmbb.com/yijing/stem-branch-relations.md","schema":"https://tttkmbb.com/api/v1/calculators/stem-branch-relations","api":"https://tttkmbb.com/api/v1/calculate/stem-branch-relations"}},{"calculator_id":"ming-gua","entity_type":"calculator","name":"Ming Gua Calculator (命卦 / Eight Mansions)","category":"yijing","tool_name":"calculate_ming_gua","description":"Computes the personal trigram (命卦, minggua) and Kua number from the birth year and sex by the Luoshu year-star method, assigns the East Four / West Four group (东四命 dongsiming / 西四命 xisiming) and lists the four favourable and four unfavourable directions of the Eight Mansions (八宅, bazhai) school.","use_when":"You need someone's Kua number, Ming Gua trigram or Eight Mansions directions from a birth date, with the year boundary at 立春 (default) or Chinese New Year.","do_not_use_when":"You need the annual Flying Star of a year (use nine-star-feng-shui), the zodiac animal (use chinese-zodiac) or a full Bazi chart (use bazi-four-pillars).","required_inputs":["birth_date","sex"],"optional_inputs":["boundary"],"urls":{"html":"https://tttkmbb.com/yijing/ming-gua","markdown":"https://tttkmbb.com/yijing/ming-gua.md","schema":"https://tttkmbb.com/api/v1/calculators/ming-gua","api":"https://tttkmbb.com/api/v1/calculate/ming-gua"}},{"calculator_id":"luoshu-square","entity_type":"calculator","name":"Luoshu Square (洛书)","category":"yijing","tool_name":"describe_luoshu_square","description":"Describes a palace of the Luoshu magic square (洛书, Lo Shu): its colour name (一白 … 九紫), later-heaven trigram, direction, element, season and family member, together with the full grid, the magic constant 15, the Hetu (河图) partner number and the opposite palace.","use_when":"You need the meaning of a Luoshu / Flying Star number 1–9, the palace grid, or which trigram and direction a number stands for.","do_not_use_when":"You need a personal Kua number (use ming-gua) or the annual/monthly flying stars of a period (use nine-star-feng-shui).","required_inputs":[],"optional_inputs":["number"],"urls":{"html":"https://tttkmbb.com/yijing/luoshu-square","markdown":"https://tttkmbb.com/yijing/luoshu-square.md","schema":"https://tttkmbb.com/api/v1/calculators/luoshu-square","api":"https://tttkmbb.com/api/v1/calculate/luoshu-square"}},{"calculator_id":"meihua-yishu","entity_type":"calculator","name":"Plum Blossom Numerology (梅花易数)","category":"yijing","tool_name":"cast_plum_blossom_hexagram","description":"Casts an I Ching hexagram by the Plum Blossom (Meihua Yishu) method of Shao Yong from the lunar year, month, day and hour (年月日时起卦) or from two or three given numbers, then derives the moving line, changed hexagram (之卦), nuclear hexagram (互卦), the 体 (Ti, self) and 用 (Yong, matter) trigrams and their five-element relations.","use_when":"You need a Plum Blossom hexagram cast for a moment or from numbers, with the upper/lower trigram arithmetic, the moving line and the 体/用 five-element reading laid out step by step.","do_not_use_when":"You already have six lines from coins or yarrow (use liuyao for a 六爻 chart or hexagram-change for plain line changes), or you only want a hexagram's text and structure (use hexagram-lookup).","required_inputs":[],"optional_inputs":["method","date","time","number_1","number_2","number_3","add_hour_to_moving_line"],"urls":{"html":"https://tttkmbb.com/yijing/meihua-yishu","markdown":"https://tttkmbb.com/yijing/meihua-yishu.md","schema":"https://tttkmbb.com/api/v1/calculators/meihua-yishu","api":"https://tttkmbb.com/api/v1/calculate/meihua-yishu"}},{"calculator_id":"liuyao","entity_type":"calculator","name":"Liu Yao Hexagram Chart (六爻)","category":"yijing","tool_name":"chart_liuyao_hexagram","description":"Builds the full Liu Yao (six-lines coin oracle) chart for six cast lines: original and changed hexagrams, the 京房 palace with 世/应 lines, the 纳甲 stem-branch of every line, six relatives (六亲) against the palace element, six beasts (六神) from the day stem, void branches (旬空), day and month relations and hidden lines (伏神).","use_when":"You have six lines cast with three coins (or as 0/1 digits with moving positions) and need the traditional 六爻 chart for a given day, including 纳甲, 六亲, 六神, 世应, 旬空, 月破 and 伏神.","do_not_use_when":"You want to cast a hexagram from a time or numbers (use meihua-yishu), or only need the structural change of lines without the calendar layer (use hexagram-change).","required_inputs":["lines"],"optional_inputs":["moving_lines","date","time"],"urls":{"html":"https://tttkmbb.com/yijing/liuyao","markdown":"https://tttkmbb.com/yijing/liuyao.md","schema":"https://tttkmbb.com/api/v1/calculators/liuyao","api":"https://tttkmbb.com/api/v1/calculate/liuyao"}},{"calculator_id":"number-numerology","entity_type":"calculator","name":"Number Numerology (数字数理)","category":"yijing","tool_name":"evaluate_number_numerology","description":"Reduces a phone, licence-plate or account number to a number 1–81 (last four digits mod 80, or the digit sum) and reports its rating and traditional gloss from the 81 数理 table of five-grid numerology, plus the five-element mapping of its digits under the 河图 and the common 数字五行 conventions, digit counts and the digital root.","use_when":"You want the traditional 81-number (数理) rating and five-element breakdown of a phone number, plate number, account tail or other digit string.","do_not_use_when":"You want the five grids of a personal name (use name-numerology) or an I Ching hexagram cast from numbers (use meihua-yishu); ratings are cultural, not statements about luck.","required_inputs":["number"],"optional_inputs":["method"],"urls":{"html":"https://tttkmbb.com/yijing/number-numerology","markdown":"https://tttkmbb.com/yijing/number-numerology.md","schema":"https://tttkmbb.com/api/v1/calculators/number-numerology","api":"https://tttkmbb.com/api/v1/calculate/number-numerology"}},{"calculator_id":"name-numerology","entity_type":"calculator","name":"Name Numerology – Five Grids (五格剖象法)","category":"yijing","tool_name":"calculate_name_five_grids","description":"Computes the five grids (天格, 人格, 地格, 总格, 外格) of a Chinese name from the 康熙字典 stroke counts of the surname and given-name characters, rates each grid with the 81 数理 table, assigns five elements by the last digit and evaluates the 三才 (heaven-human-earth) configuration by the generating and controlling cycles.","use_when":"You have the Kangxi stroke counts of a one- or two-character surname and a one- or two-character given name and want the 五格 numbers, their ratings, the 三才 elements and its 生克 assessment.","do_not_use_when":"You need stroke counts themselves (look them up in the 康熙字典; simplified-character counts give different grids), or you want a number rating for a phone or plate (use number-numerology).","required_inputs":["surname_strokes","given_name_strokes"],"optional_inputs":["surname","given_name"],"urls":{"html":"https://tttkmbb.com/yijing/name-numerology","markdown":"https://tttkmbb.com/yijing/name-numerology.md","schema":"https://tttkmbb.com/api/v1/calculators/name-numerology","api":"https://tttkmbb.com/api/v1/calculate/name-numerology"}}]},"timestamp":"2026-09-24T08:33:28Z","next_actions":[],"links":{"docs":"https://tttkmbb.com/calculators.md"}}