# 銀行くん

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 2 of 5 capability checks passed.

- host: bank.teraren.com
- url: https://bank.teraren.com/
- category: bank code api
- type: saas
- country: JP
- locations: Japan
- language: ja

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 2 of 5 checks passed.

- fail — Markdown negotiation
- fail — Markdown twin at a predictable URL
- PASS — llms.txt
- PASS — API catalog
- fail — MCP server answers

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **search** — "銀行名・読み・コードで検索"
- **query_api** — "無料 JSON API 登録不要・制限なし" → `https://bank.teraren.com/api`
- **contact** — "お問い合わせ" → `https://bank.teraren.com/contact`

## Summary

Provides a free API to instantly search bank codes, financial institution codes, and branch codes in Japan without registration.

## Context

2006 sites in this index share the type "saas"; 1410 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark