Japan & Korea × Blockchain, Crypto & Web3

Blockchain, Crypto & Web3 in Japan & Korea

13 blockchain, crypto & web3 providers across Japan & Korea, publishing 17 APIs.

13 providers 17 published APIs 45 indexed documents

Blockchain, Crypto & Web3 across Japan & Korea — 13 providers on the APIs.io network sit in both cohorts, and between them they publish 17 indexed APIs.

7 of the 13 publish at least one machine-readable API; 6 publish nothing indexed at all. That split is the first thing worth reading here — a vertical can be well represented in a market and still have almost no programmable surface.

By Kin Score band: 4 thin, 4 minimal, 2 developing, 2 emerging, and 1 exemplar.

Leading by rating: PAY.JP, JPX (Japan Exchange Group), Paidy, Korbit, Bithumb, PayPay, and 7 more.

Region membership is derived from three explicit signals — a provider tag, a provider-name pattern, or a stated headquarters in the provider’s own description. This is a map of stated headquarters, not of markets served.

Providers (13)

Provider Description APIs Rating
PAY.JP PAY.JP is an online payment service operated by PAY, Inc. (PAY株式会社) in Japan. Its Stripe-style REST API lets merchants create charges, tokenize cards, manage customers, run subs... 1 exemplar
JPX (Japan Exchange Group) JPX (Japan Exchange Group) operates the Tokyo Stock Exchange, Osaka Exchange, and Tokyo Commodity Exchange, and sells Japanese market data through its JPX Market Innovation & Re... 8 developing
Paidy Paidy is a Japanese buy now, pay later (BNPL) and digital payment service that enables Japanese consumers to make purchases and pay later via monthly consolidated billing. Merch... 1 developing
Korbit Korbit is South Korea's first cryptocurrency exchange, founded in 2013 and headquartered in Seoul, offering KRW-denominated spot trading of bitcoin, ether and other digital asse... 1 thin
Bithumb Bithumb is South Korea's leading cryptocurrency exchange platform offering REST and WebSocket APIs for spot trading across KRW, BTC, and USDT markets. The APIs cover market data... 1 thin
PayPay PayPay is Japan's largest QR/barcode mobile-payment network (a SoftBank / Yahoo Japan / Paytm joint venture) with tens of millions of users. Its Open Payment API (OPA v2) lets p... 1 thin
Dunamu Dunamu Inc. (두나무 주식회사) is a South Korean fintech and blockchain company founded in April 2012 and headquartered at 369 Gangnam-daero, Seocho-gu, Seoul. Dunamu operates Upbit, Ko... 0 thin
Toss Toss is a Korean financial super-app operated by Viva Republica that provides REST APIs for payments, banking, credit scoring, identity verification, and financial services acro... 4 emerging
Kyash Kyash Inc. (株式会社Kyash) is a Tokyo-based fintech founded in 2015 that operates a consumer mobile wallet and Visa prepaid card in Japan, covering charging, peer-to-peer transfers,... 0 emerging
8percent 8percent (에잇퍼센트) is a Seoul-based fintech company, founded in November 2014, that built Korea's first-generation peer-to-peer lending marketplace and in June 2021 became the cou... 0 minimal
enechain enechain operates the largest energy exchange in Japan, offering trading opportunities for wholesale electricity and environmental values across an over-the-counter marketplace ... 0 minimal
Taiyaki Studios Taiyaki Studios is a Tokyo-based startup working to redefine how anime is consumed, delivering stories that are immediate, engaging, and satisfying. Surfaced as a portfolio comp... 0 minimal
NOD Games NOD Games is a Seoul-based blockchain game studio founded in 2019 by CEO Chanki Lee, building entertaining game content and open, player-owned game platforms where gamers and co... 0 minimal

Indexed API documents (45)

Two numbers, both real: these providers publish 17 APIs as their own documents, which the catalog indexes split one-per-resource into 45 documents.

PAY.JP 3D Secure API

PAY.JP
The 3D Secure API from PAY.JP — 4 operation(s) for 3d secure.

PAY.JP Account API

PAY.JP
The Account API from PAY.JP — 1 operation(s) for account.

PAY.JP Balances API

PAY.JP
The Balances API from PAY.JP — 2 operation(s) for balances.

PAY.JP Cards API

PAY.JP
The Cards API from PAY.JP — 2 operation(s) for cards.

PAY.JP Charges API

PAY.JP
The Charges API from PAY.JP — 6 operation(s) for charges.

PAY.JP Customers API

PAY.JP
The Customers API from PAY.JP — 2 operation(s) for customers.

PAY.JP Events API

PAY.JP
The Events API from PAY.JP — 2 operation(s) for events.

PAY.JP Plans API

PAY.JP
The Plans API from PAY.JP — 2 operation(s) for plans.

PAY.JP Platform API

PAY.JP
The Platform API from PAY.JP — 4 operation(s) for platform.

PAY.JP Statements API

PAY.JP
The Statements API from PAY.JP — 3 operation(s) for statements.

PAY.JP Subscriptions API

PAY.JP
The Subscriptions API from PAY.JP — 5 operation(s) for subscriptions.

PAY.JP Terms API

PAY.JP
The Terms API from PAY.JP — 2 operation(s) for terms.

PAY.JP Tokens API

PAY.JP
The Tokens API from PAY.JP — 3 operation(s) for tokens.

PAY.JP Transfers API

PAY.JP
The Transfers API from PAY.JP — 3 operation(s) for transfers.

J-Quants Equities API

JPX (Japan Exchange Group)
Listed issue master, daily and morning-session OHLCV, minute bars and tick trades (add-on), earnings calendar, and weekly trading by inve...

J-Quants Markets API

JPX (Japan Exchange Group)
Market-structure datasets under /v2/markets/* - trading calendar, short sale position reports, short ratio by sector, weekly margin inter...

J-Quants Indices API

JPX (Japan Exchange Group)
Daily OHLC for TOPIX and other JPX indices under /v2/indices/* endpoints, with plan-gated access (TOPIX from Light, full index set from S...

J-Quants Financials API

JPX (Japan Exchange Group)
Corporate financial data under /v2/fins/* - summary report figures (EPS, forecasts), detailed BS/PL/CF statements, and cash dividend data...

J-Quants Derivatives API

JPX (Japan Exchange Group)
Daily OHLC for Osaka Exchange futures and options under /v2/derivatives/*, including Nikkei 225 options (Standard plan) and the full futu...

J-Quants EDINET Data API

JPX (Japan Exchange Group)
Structured data extracted from EDINET regulatory filings under /v2/edinet/* - major shareholders, cross-shareholdings (policy holdings), ...

J-Quants TDnet Disclosure API

JPX (Japan Exchange Group)
Add-on access to TDnet timely-disclosure documents - a disclosure index (/td/list), document file retrieval (/td/files), and bulk CSV dow...

J-Quants Bulk Download API

JPX (Japan Exchange Group)
File-based delivery alongside the REST endpoints - list available bulk files (/bulk/list) and download gzipped CSV extracts (/bulk/get) f...

Paidy Checkout

Paidy
JavaScript-based checkout integration that enables consumers to authenticate with Paidy and authorize payments or create recurring paymen...

Paidy Payments API

Paidy
Manage payment authorizations, captures, refunds, updates, and closures.

Paidy Tokens API

Paidy
Manage recurring payment tokens for subscription billing.

Korbit Open API v2 WebSocket

Korbit
WebSocket streaming API for the Korbit exchange. Public channels stream ticker, orderbook and trade market data; private channels stream ...

Korbit Asset API

Korbit
The Asset API from Korbit — 1 operation(s) for asset.

Korbit Deposit (Crypto) API

Korbit
The Deposit (Crypto) API from Korbit — 3 operation(s) for deposit (crypto).

Korbit Deposit/Withdrawal (KRW) API

Korbit
The Deposit/Withdrawal (KRW) API from Korbit — 4 operation(s) for deposit/withdrawal (krw).

Korbit Other API

Korbit
The Other API from Korbit — 8 operation(s) for other.

Korbit Quotation API

Korbit
The Quotation API from Korbit — 6 operation(s) for quotation.

Korbit Trading API

Korbit
The Trading API from Korbit — 4 operation(s) for trading.

Korbit Withdrawal (Crypto) API

Korbit
The Withdrawal (Crypto) API from Korbit — 3 operation(s) for withdrawal (crypto).

Bithumb WebSocket API

Bithumb
Real-time WebSocket API for streaming market data including tickers, order books, and trade executions, as well as authenticated streams ...

Bithumb Account API

Bithumb
Asset account management

Bithumb General API

Bithumb
Server time and configuration

Bithumb Market Data API

Bithumb
Public spot market data endpoints

Bithumb Spot Trading API

Bithumb
Authenticated spot order management

Bithumb Wallet API

Bithumb
Deposit and withdrawal history

PayPay Payment API

PayPay
Everything involved in the payment life cycle

PayPay Payments API

PayPay
The Payments API from PayPay — 1 operation(s) for payments.

Toss Payments API

Toss
REST API for processing payments, authorizations, cancellations, and refunds through the Toss Payments platform. Supports card, virtual a...

Toss Pay API

Toss
Legacy REST API for Toss Pay payment transactions, merchant approval flows, refunds, and payment status checks. Operates on the pay.toss....

Toss Payments Webhooks

Toss
Event-driven webhook system for receiving real-time notifications on payment status changes, virtual account deposits, cancellations, Bra...

Toss Payments Payouts API

Toss
API for marketplace and platform operators to disburse funds to registered sellers. Supports seller registration, payout requests, and ev...

Other industries in Japan & Korea

Artificial Intelligence 36 Education & EdTech 21 Data & Analytics 20 Digital Health & Telehealth 14 Healthcare 14 IoT & Connected Devices 14 Supply Chain & Procurement 14 Telecommunications & Connectivity 14 Cybersecurity & Identity 13 Retail 13 Developer Tools & DevOps 12 Human Resources & Payroll 12 All of Japan & Korea →

Blockchain, Crypto & Web3 elsewhere

North America 62 Europe 43 Latin America 21 United Kingdom & Ireland 18 Southeast Asia 16 Africa 14 India & South Asia 12 DACH (Germany · Austria · Switzerland) 10 Greater China 9 Middle East 8 France & Iberia 6 Australia & New Zealand 4 All of Blockchain, Crypto & Web3 →

This page is the intersection of two independently computed cohorts: Japan & Korea and Blockchain, Crypto & Web3. A provider appears here only when it is already a member of both. Japan & Korea membership is matched on tag, name pattern, stated HQ, so this is a floor rather than a census — coverage gaps show up here as small numbers, not as absent pages.

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Tools for regions

6 MCP tools reach this
  • find_regionsBrowse and filter every region in the catalog.
  • get_region_leadersPRO — top-rated providers in this region.
  • cohort_statsPRO — the distribution across the region.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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