{"domain":"logigrain.net","count":1,"changes":[{"captured_at":"2026-10-24T15:10:21.073839","card_hash":"bffe8f2f57333dffa6150adc756732c6fcc9234f33f44c977966d47cb67e94ad","previous_card_hash":null,"diff":{"skills_added":[{"id":"code","name":"Syntax check","description":"Syntax check for JSON, HTML and CSS snippets. Executed via the paid HTTP endpoint https://logigrain.net/api/code (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["syntax","validation","html","css","json"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"compound","name":"Compound interest","description":"Compound interest with optional monthly contributions. Executed via the paid HTTP endpoint https://logigrain.net/api/compound (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["finance","compound interest"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"convert","name":"Currency conversion","description":"Currency conversion using live exchange rates (cached 60 s). Executed via the paid HTTP endpoint https://logigrain.net/api/convert (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["currency","exchange rate","forex"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"convert-unit","name":"Unit conversion","description":"Unit conversion: length, weight, speed, data, area, volume, energy, temperature. Executed via the paid HTTP endpoint https://logigrain.net/api/convert-unit (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["unit conversion","measurement"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"date","name":"Date calculations","description":"Date difference, add days, Unix timestamp conversion, weekday count. Executed via the paid HTTP endpoint https://logigrain.net/api/date (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["date","calendar","business days"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"era","name":"Japanese era (wareki) conversion","description":"Japanese era (wareki: 令和/平成/昭和/大正/明治) to Gregorian and back, with real-date and era-start validation, plus Japanese fiscal year. Executed via the paid HTTP endpoint https://logigrain.net/api/era (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["japanese era","wareki","calendar","和暦"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"feed","name":"Live forex / crypto prices","description":"Live forex rates or crypto prices (cached). Executed via the paid HTTP endpoint https://logigrain.net/api/feed (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["forex","crypto","prices"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"housing-loan","name":"Japan mortgage tax deduction (住宅ローン控除)","description":"Japan mortgage tax deduction (住宅ローン控除) for move-ins 2026-2030 under the FY2026 reform: borrowing limit and 13/10-year period by new/resale/used, performance class, special household and floor area, dated transitional rules, yearly deduction or a full-period projection from a loan with the income-tax/resident-tax split. Refuses older move-ins instead of mixing rules; asks for missing facts. Rules checked against the National Tax Agency tax answers (law as of 2026-04-01) and cross-checked by an independent implementation. Executed via the paid HTTP endpoint https://logigrain.net/api/housing-loan (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["japan","mortgage","tax deduction","housing","住宅ローン控除"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"json","name":"JSON validate / format / minify","description":"JSON validate, format or minify, with key count and depth. Executed via the paid HTTP endpoint https://logigrain.net/api/json (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["json","validation","formatting"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"kyusei","name":"Nine Star Ki","description":"Nine Star Ki (九星気学): main star and monthly star with solar-term boundaries computed astronomically (within about 15 minutes, 1900-2150), Japan time. Executed via the paid HTTP endpoint https://logigrain.net/api/kyusei (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["nine star ki","kyusei","九星気学"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"math","name":"Math expression evaluation","description":"Safe math expression evaluation (no code execution): functions, constants, variables. Executed via the paid HTTP endpoint https://logigrain.net/api/math (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["math","calculator","expression"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"moon","name":"Moon phase","description":"Moon phase from a true ephemeris: age, illumination, phase name (Japanese/English), next full and new moon date and time (within about 2 minutes), timezone aware. Executed via the paid HTTP endpoint https://logigrain.net/api/moon (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["moon","lunar phase","full moon","new moon","月齢"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"nenkin","name":"Japanese public pension estimate","description":"Japanese public pension estimate (老齢基礎年金) using official parameters for the current fiscal year (FY2026 full amount 847,300 yen): exemptions, early claim/deferral rates, fuka-nenkin. Returns the rule year used and a quotable sentence; asks for the contribution record instead of guessing; warns when parameters are stale. Executed via the paid HTTP endpoint https://logigrain.net/api/nenkin (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["japan","pension","nenkin","老齢基礎年金"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"nenkin-deferral","name":"Pension start-age decision (break-even and survival)","description":"When to start the Japanese public pension: break-even age of early claim or deferral versus a baseline, probability of living to that age from the official Japanese life table (令和7年簡易生命表, by sex), and expected lifetime total for each start age 60-75. Returns the rule year used, assumptions, what would change the answer, and a quotable sentence. Totals cross-checked by an independent implementation. Executed via the paid HTTP endpoint https://logigrain.net/api/nenkin-deferral (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["japan","pension","deferral","life table","繰下げ","生命表"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"nisa","name":"Japan new NISA remaining limits","description":"Japan new NISA limits: how much can still be bought this year and next year under the annual limits (つみたて 1.2M / 成長 2.4M yen) and the 18M-yen lifetime book-value limit (成長 up to 12M). Selling frees the book value (cost), not the sale price, from the next year. Returns the rule basis, assumptions, what would change the answer and a quotable sentence; asks for book values instead of guessing. Rules checked against the FSA NISA site. Executed via the paid HTTP endpoint https://logigrain.net/api/nisa (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["japan","nisa","tax-free investment","limits","新NISA"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"probability","name":"Probability (Bayes, combinations, permutations)","description":"Bayes theorem, exact combinations and permutations (big-integer exact result). Executed via the paid HTTP endpoint https://logigrain.net/api/probability (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["probability","bayes","combinatorics"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"seiyo","name":"Western astrology natal chart","description":"Western astrology natal chart (西洋占星術): Sun-Neptune longitudes and signs, ASC/MC, Placidus and whole-sign houses, aspects. Verified against Swiss Ephemeris (planets mostly within 0.03 deg, cusps within 0.01 deg, 1950-2024). Executed via the paid HTTP endpoint https://logigrain.net/api/seiyo (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["astrology","natal chart","horoscope","ephemeris","西洋占星術"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"shibu","name":"Zi Wei Dou Shu chart","description":"Zi Wei Dou Shu (紫微斗数) natal chart: lunar date, 命宮/身宮, 五行局, 14 major stars, auxiliary and malefic stars, 四化, 大限, optional 流年. Lunar-new-year boundary; documented leap-month convention. Executed via the paid HTTP endpoint https://logigrain.net/api/shibu (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["zi wei dou shu","purple star astrology","紫微斗数"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]},{"id":"shichu","name":"Four Pillars / BaZi","description":"Four Pillars / BaZi (四柱推命): year, month, day and hour pillars with solar-term boundaries in JST. Pillars cross-checked against an independent Chinese-calendar library on 3,000 random datetimes. Executed via the paid HTTP endpoint https://logigrain.net/api/shichu (x402, $0.001 USDC per call on Base); this A2A interface returns the exact request to make.","tags":["bazi","four pillars","chinese astrology","四柱推命"],"inputModes":["application/json","text/plain"],"outputModes":["application/json","text/plain"]}],"skills_removed":[],"skills_changed":[],"fields_changed":[{"field":"name","before":null,"after":"LogiGrain"},{"field":"description","before":null,"after":"Deterministic astronomy, calendar, divination and Japanese public-system calculations (Western astrology, Four Pillars, Nine Star Ki, Zi Wei Dou Shu, moon phase, Japanese era, Japanese public pension) plus utility math. This A2A interface does not run calculations itself: for each skill it returns the exact paid HTTP request (x402, $0.001 USDC per call on Base mainnet) that produces the result. Send a data part {\"skill\": \"<skill id>\", \"params\": {...}} or a short text naming the skill."},{"field":"version","before":null,"after":"3.9.0"},{"field":"protocolVersion","before":null,"after":"0.3"},{"field":"url","before":null,"after":"https://logigrain.net/a2a"},{"field":"documentationUrl","before":null,"after":"https://logigrain.net/llms.txt"},{"field":"preferredTransport","before":null,"after":"JSONRPC"},{"field":"supportedInterfaces","before":null,"after":[{"url":"https://logigrain.net/a2a","protocolBinding":"JSONRPC","protocolVersion":"1.0"},{"url":"https://logigrain.net/a2a","protocolBinding":"JSONRPC","protocolVersion":"0.3"}]},{"field":"capabilities","before":null,"after":{"streaming":false,"pushNotifications":false,"extendedAgentCard":false}},{"field":"provider","before":null,"after":{"organization":"LogiGrain","url":"https://logigrain.net"}}],"other_changed":true,"is_empty":false,"human_summary":"added 19 skills · name ∅ → LogiGrain · description ∅ → Deterministic astronomy, calendar, divin · version ∅ → 3.9.0 · protocolVersion ∅ → 0.3 · url ∅ → https://logigrain.net/a2a · documentationUrl ∅ → https://logigrain.net/llms.txt · preferredTransport ∅ → JSONRPC · supportedInterfaces ∅ → https://logigrain.net/a2a (JSONRPC), htt · capabilities ∅ → none · provider ∅ → LogiGrain"}}]}