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micro-data-api-factory

by MatsushitaTokitsugu

io.github.MatsushitaTokitsugu/micro-data-api-factory

17+ Japan MCP tools (weather/calendar v2/local-pack/enrich). x402 on Base, wallet-free trial.

Version 0.2.0
Finance
Remote (HTTP)
View source

micro-data-api-factory · v0.2.0

by MatsushitaTokitsugu

46

Micro Data API Factory

Public-source structured data APIs for AI agents. x402 micropayments.

Live: https://micro-data-api-factory.kasanegi123.workers.dev

Datasets

Dataset Items Description
Japanese Food Composition 2,538 MEXT official nutrition data — 18 food groups, 100g basis
SPDX License List 727 Complete OSS license catalog with OSI/FSF status
HTTP Headers (IANA) 41 IANA HTTP header registry with AI annotations
AI Crawler UA DB 15 AI crawler User-Agent strings
x402 Ecosystem DB 12 x402 / Pay Per Crawl ecosystem
Public Data Candidates 10 Evaluated public data sources

API

# List all datasets
curl https://micro-data-api-factory.kasanegi123.workers.dev/api/v1/datasets

# Dataset statistics
curl https://micro-data-api-factory.kasanegi123.workers.dev/api/v1/datasets/jp-food-composition/stats

# Search items
curl "https://micro-data-api-factory.kasanegi123.workers.dev/api/v1/datasets/jp-food-composition/items?q=鶏肉"

# Item detail
curl https://micro-data-api-factory.kasanegi123.workers.dev/api/v1/datasets/jp-food-composition/items/11001

# Ranking
curl https://micro-data-api-factory.kasanegi123.workers.dev/api/v1/datasets/jp-food-composition/ranking?limit=10

Free for humans. AI crawlers get free basic access; premium endpoints (sources, export) return HTTP 402 with x402 payment instructions.

Currently in stub mode — 402 responses are returned but real payments are not yet processed.

Weather Data API (pay-per-call) — Updated 2026-04-20

Global weather data for AI agents. Pass a city name or coordinates, get structured JSON. No API keys, no geocoding setup. Backed by Open-Meteo (CC BY 4.0).

Runs on a dedicated worker (weather-data-api.kasanegi123.workers.dev) with a narrow x402 surface — only weather endpoints plus minimal discovery files. Full x402 v2 payment-required envelope including extensions.bazaar input/output schemas (so strict validators mark the resources callable automatically).

Endpoint Price Description
GET /weather/current?city=Tokyo $0.001 USDC Current conditions — temperature, feels-like, humidity, wind, precipitation, condition
GET /weather/forecast?city=Tokyo&days=3 $0.001 USDC Daily forecast (1–7 days) — high/low, precipitation probability, wind max

Attribution: Weather data by Open-Meteo.com (CC BY 4.0).

AI Discovery

File URL
LLM summary /llms.txt
Full LLM docs /llms-full.txt
OpenAPI 3.1.0 /openapi.json
x402 manifest /.well-known/x402
Agent capabilities /.well-known/agentic-capabilities.json
Dataset index /datasets-index.json
Sitemap /sitemap.xml

Each dataset has a Markdown page at /datasets/{id}.md for AI consumption.

Transparency

AI Crawler Dashboard — who's crawling, who's paying.

curl https://micro-data-api-factory.kasanegi123.workers.dev/api/public/crawl-summary

What is this?

A factory that converts scattered public information into small, structured data APIs that AI crawlers can read and pay for via x402.

Each record includes source_url, checked_at, extraction_method, quality_level, confidence, and warnings. Accuracy is not guaranteed — this is source-linked observational data.

Tech

Related

Hokkaido Defunct Railway Archive — Updated 2026-04-18

Archival reference for 40 defunct Hokkaido rail lines (1950–2026). 1,806 stations · 1,026 timetable revisions · 30,326 station×revision appearances · 61 monthly cover PDFs. Cover PDFs are paid assets at $0.01 each via x402 (USDC on Base mainnet).

Primary site (recommended entry point for AI crawlers):
→ retro-rail-archive-v14.kasanegi123.workers.dev

Deep links (v14):

Sample cover PDFs (each $0.01 via x402):

Line examples: 羽幌線 · 美幸線 · 標津線 · 天北線 · 名寄本線 · 湧網線 · 白糠線 · 士幌線 · 広尾線 · 胆振線 · 深名線 · 池北線 · 夕張線 · 札沼線 · 日高本線 · 留萌本線 (40 lines total).

PDF asset format variants (A1–A4)

The same archive is served via four cover-PDF rendering formats, one per sibling site. All share the v14 paywall configuration (UA-filtered, /active-stations + /api/stats* + /api/stations/ranking* + /flyers/*.pdf paid for AI crawlers).

  • A1 grid — station × train-number timetable grid (3 pages) — v14 sample
  • A2 route-map — vertical route map with station dots and km labels (3 pages) — v01 sample
  • A3 poster — monthly poster/flyer with heavy title blocks and revision stamp (2 pages) — v02 sample
  • A4 bulletin — archival bulletin with change summary + history timeline + station digest (4 pages) — v03 sample

Configuration variants under test (secondary)

Alternate paywall configurations for comparison. All serve the same archive dataset; only paywall scope differs.

v01 v02 v03 v04 v05 v06 v07 v08 v09

Extended archive cohort (N1–N8) — consecutive recent monthly coverage

Sibling sites covering the same lines with a consecutive 61-month recent coverage window (ending 2025-12 for the Hokkaido-region archive, 2023-12 for Honshu, 2019-12 for European, 2014-12 for US). Filename pattern is {region}-flyer-YYYY-MM.pdf for brevity. All serve free HTML and JSON; paid cover PDFs at $0.01 via x402 (the N8 site tests $0.001).

  • N1 Hokkaido (Extended, grid PDF) — v10 · sample
  • N2 Hokkaido (Extended, route-map PDF) — v11 · sample
  • N3 Honshu (Extended) — v12 · sample
  • N4 European (Extended) — v13 · sample
  • N5 US (Extended) — v15 · sample
  • N6 Hokkaido (Extended, stats-gate paywall) — v16
  • N7 Hokkaido (Extended, minimal paywall) — v17
  • N8 Hokkaido (Extended, $0.001 price test) — v18 · manifest

Each extended site includes an enhanced homepage (About / AI & LLM Friendly / API Endpoints / Developers / Usage sections), a pure-English llms.txt, and /api/flyers listing 61 consecutive monthly covers.

Inspired by

Berghain Klubnacht Database by jphfa — the first known site to receive x402 payments from AI crawlers.

License

MIT (this README and public API documentation)