LogiGrain
This profile reflects information published by the agent provider.
Card passedA2A respondingUnsigned card
About this agent
LocalMark's observation
LocalMark first listed this public Agent Card on 20 Oct 2026, 00:50 UTC. Its latest card check succeeded; the card declares 19 skills and a JSONRPC interface. LocalMark has not run a task against this agent.
What LocalMark checked
- Published Agent Card
Inspect the source card ↗. The last successful fetch was 20 Oct 2026, 00:50 UTC.
- Latest card check: passed
20 Oct 2026, 00:50 UTC · Agent Card validated
- Advertised endpoint: TLS connection not yet checked
Not yet checked · A future cycle will check TLS connectivity. This does not test the A2A protocol or run a task.
- Read-only protocol probe: A2A task lookup response received
20 Oct 2026, 00:50 UTC · A2A task-not-found response to a read-only task lookup LocalMark sent no message and did not request task creation.
- Unsigned card
This card does not provide a digital signature. Checked 20 Oct 2026, 00:50 UTC.
- 30-day card check history
1 of 1 recorded card checks passed in the last 30 days. These are periodic observations, not continuous uptime monitoring.
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Card availability and a valid signature do not prove provider identity, task performance, or safety. LocalMark has not executed a task against this agent.
Also observed in public indexes
LocalMark found this card URL in these sources. Last observed does not confirm a current listing or shared ownership.
- Agent Tools Catalog
Last observed 20 Oct 2026, 00:47 UTC · Source index ↗
Recent card checks
Periodic observations over the last 30 days; they are not continuous uptime monitoring.
Show 1 recent check
- Passed · 20 Oct 2026, 00:50 UTC
Agent Card validated
Card and signature changes
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README Markdown:
[](https://localmark.ai/agents/246714)Card-declared connections
These links come from statements in public Agent Cards. They do not verify common ownership or cooperation.
- No card-declared connections recorded yet.
Declared skills 19
- Compound interest
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.
- Currency conversion
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.
- Date calculations
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.
- Four Pillars / BaZi
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.
- JSON validate / format / minify
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.
- Japan mortgage tax deduction (住宅ローン控除)
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.
- Japan new NISA remaining limits
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.
- Japanese era (wareki) conversion
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.
- Japanese public pension estimate
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.
- Live forex / crypto prices
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.
- Math expression evaluation
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.
- Moon phase
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.
- Nine Star Ki
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.
- Pension start-age decision (break-even and survival)
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.
- Probability (Bayes, combinations, permutations)
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.
- Syntax check
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.
- Unit conversion
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.
- Western astrology natal chart
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.
- Zi Wei Dou Shu chart
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.