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Card snapshot
logigrain.net
·
2026-10-24 15:10:21 UTC
·
bffe8f2f57333dffa6150adc756732c6fcc9234f33f44c977966d47cb67e94ad
This is a frozen copy of the agent's agent-card.json as we observed it at the timestamp above. We capture a new snapshot every time the card's content hash changes. Useful for: forensic drift analysis, verifying downstream callers see the right version, reproducing routing decisions made historically.
{
"name": "LogiGrain",
"description": "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.",
"supportedInterfaces": [
{
"url": "https://logigrain.net/a2a",
"protocolBinding": "JSONRPC",
"protocolVersion": "1.0"
},
{
"url": "https://logigrain.net/a2a",
"protocolBinding": "JSONRPC",
"protocolVersion": "0.3"
}
],
"provider": {
"organization": "LogiGrain",
"url": "https://logigrain.net"
},
"version": "3.9.0",
"documentationUrl": "https://logigrain.net/llms.txt",
"capabilities": {
"streaming": false,
"pushNotifications": false,
"extendedAgentCard": false
},
"defaultInputModes": [
"application/json",
"text/plain"
],
"defaultOutputModes": [
"application/json",
"text/plain"
],
"skills": [
{
"id": "seiyo",
"name": "Western astrology natal chart",
"description": "Western astrology natal chart (\u897f\u6d0b\u5360\u661f\u8853): 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",
"\u897f\u6d0b\u5360\u661f\u8853"
],
"examples": [
"Natal chart for 1990-05-15 08:30 in Tokyo"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "shichu",
"name": "Four Pillars / BaZi",
"description": "Four Pillars / BaZi (\u56db\u67f1\u63a8\u547d): 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",
"\u56db\u67f1\u63a8\u547d"
],
"examples": [
"Four pillars for 1990-05-15 08:30 (Japan time)"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "kyusei",
"name": "Nine Star Ki",
"description": "Nine Star Ki (\u4e5d\u661f\u6c17\u5b66): 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",
"\u4e5d\u661f\u6c17\u5b66"
],
"examples": [
"Main and monthly star for 1982-06-20 10:30"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "shibu",
"name": "Zi Wei Dou Shu chart",
"description": "Zi Wei Dou Shu (\u7d2b\u5fae\u6597\u6570) natal chart: lunar date, \u547d\u5bae/\u8eab\u5bae, \u4e94\u884c\u5c40, 14 major stars, auxiliary and malefic stars, \u56db\u5316, \u5927\u9650, optional \u6d41\u5e74. 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",
"\u7d2b\u5fae\u6597\u6570"
],
"examples": [
"Zi Wei Dou Shu chart for 1990-08-15 06:00, male"
],
"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",
"\u6708\u9f62"
],
"examples": [
"Moon phase and next full moon for 2026-10-15 in Japan time"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "era",
"name": "Japanese era (wareki) conversion",
"description": "Japanese era (wareki: \u4ee4\u548c/\u5e73\u6210/\u662d\u548c/\u5927\u6b63/\u660e\u6cbb) 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",
"\u548c\u66a6"
],
"examples": [
"Convert 2019-05-01 to the Japanese era"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "nenkin",
"name": "Japanese public pension estimate",
"description": "Japanese public pension estimate (\u8001\u9f62\u57fa\u790e\u5e74\u91d1) 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",
"\u8001\u9f62\u57fa\u790e\u5e74\u91d1"
],
"examples": [
"Basic pension for birth 1975-06-15, 456 paid months, starting at 67"
],
"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 (\u4ee4\u548c7\u5e74\u7c21\u6613\u751f\u547d\u8868, 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",
"\u7e70\u4e0b\u3052",
"\u751f\u547d\u8868"
],
"examples": [
"Is deferring the pension to 70 worth it for a man born 1975-06-15?"
],
"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 (\u3064\u307f\u305f\u3066 1.2M / \u6210\u9577 2.4M yen) and the 18M-yen lifetime book-value limit (\u6210\u9577 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",
"\u65b0NISA"
],
"examples": [
"How much NISA limit is left this year and next year after selling 1,000,000 yen of book value?"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"id": "housing-loan",
"name": "Japan mortgage tax deduction (\u4f4f\u5b85\u30ed\u30fc\u30f3\u63a7\u9664)",
"description": "Japan mortgage tax deduction (\u4f4f\u5b85\u30ed\u30fc\u30f3\u63a7\u9664) 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",
"\u4f4f\u5b85\u30ed\u30fc\u30f3\u63a7\u9664"
],
"examples": [
"How much mortgage tax deduction for a new ZEH home moving in April 2026, 40M yen loan at 0.8% for 35 years, family with a child?"
],
"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"
],
"examples": [
"10000 at 7% for 20 years"
],
"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"
],
"examples": [
"100 USD to JPY"
],
"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"
],
"examples": [
"100 kilometer to mile"
],
"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"
],
"examples": [
"Validate {\"key\":\"value\"}"
],
"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"
],
"examples": [
"sqrt(144)+2^10"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
},
{
"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"
],
"examples": [
"Check that an HTML snippet has no unclosed tags"
],
"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"
],
"examples": [
"BTC and ETH prices in USD"
],
"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"
],
"examples": [
"Days between 2026-01-01 and 2026-12-31"
],
"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"
],
"examples": [
"C(60,30) exactly"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json",
"text/plain"
]
}
],
"protocolVersion": "0.3",
"url": "https://logigrain.net/a2a",
"preferredTransport": "JSONRPC"
}