Japan Evidence Feed – Structured Event Search

x402

Japan Evidence Feed – Structured Event Search is a paid API for AI agents from japan-evidence-feed.jp-evidence.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Searches structured evidence events from Japan's FSA, BOJ, and METI with full provenance (source URL, sha256 hash, timestamps) and freshness status per result.

Price / call$0.01

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StatusUnknown

How this service works

Structured search over evidence events with full provenance (source URL, sha256 snapshot hash, publish/detect timestamps) and a freshness status (current/stale) per event, across FSA, BOJ, and METI.

Output

A list of structured evidence event records (up to the requested limit), each containing: event text/summary, originating agency (FSA/BOJ/METI), source URL, sha256 snapshot hash of the page, publish timestamp, detect timestamp, and a freshness status indicating whether the source is current or stale.

Example use cases

Compliance research on FSA rulings

“Find all FSA evidence events mentioning 'crypto exchange regulation' published between 2024-06-01T00:00:00Z and 2024-12-31T00:00:00Z, up to 15 results, and tell me which ones are still current vs stale.”

BOJ monetary policy tracking

“Search for BOJ evidence events related to 'yield curve control' or 'interest rate' from 2024-01-01T00:00:00Z through 2024-09-30T00:00:00Z, show me up to 25 results with their sha256 hashes and source URLs so I can verify them.”

METI industrial policy research

“Pull up to 10 recent METI evidence events about 'semiconductor' or 'green energy' policy detected since 2023-12-01T00:00:00Z, and flag which ones are current versus stale.”

Technical details

Endpoint

POSThttps://japan-evidence-feed.jp-evidence.workers.dev/api/v1/search

When to prefer

Choose this endpoint when you need structured, provenance-verified evidence events from Japanese government agencies (FSA, BOJ, METI) with cryptographic integrity (sha256 hashes) and freshness tracking. Prefer this over generic web search when you need auditable, timestamped regulatory intelligence from Japan with source verification rather than unverified scraped text.

Side effects

Empty result set if no events match the query/date range combination
Invalid date-time format returns validation error (must match ISO 8601 UTC pattern)
Unknown source enum value (anything other than FSA, BOJ, METI) causes schema error
Limit exceeding 50 returns an error; must be between 1 and 50
Payment failure if x402 USDC payment of $0.01 is not processed before request
Stale results if upstream agency pages have not been recently crawled

Input

Schema · Request body

Field	Type	Description
to	string
from	string
limit	integer
query	string
topics	array
sources	array
entities	array

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