iHash API Documentation — PayKing Corporation

iHash API

Zero-Data Identity Verification Infrastructure — PayKing Corporation

API v1.0 — LIVE

Overview

iHash API enables enterprises to verify and seal digital identities without storing personal data. Only cryptographic hashes are stored on server. Original data never leaves the client. Zero PII custody risk.

Base URL: https://ishashsign.com/api/v1

Authentication

Include your API key in every request header:

X-API-Key: YOUR_API_KEY

To obtain an API key, contact: mearida@hanmail.net

Endpoints

GET /auth/merchant-salt Get merchant salt for client-side hashing

Response

{
  "success": true,
  "merchantId": "merchant_abc123",
  "merchantSalt": "a3f9d2e1b8c7...",
  "code": "SALT_OK"
}

POST /auth/signup Register identity — only hash stored

Request Body

identHash*stringSHA-256 hash of (name + idNumber + merchantSalt)

email*stringUser email (stored as plain text)

noncestring32-byte random nonce

Response

{
  "success": true,
  "userId": "usr_xyz789",
  "identHash": "a1b2c3d4e5f6...",
  "code": "SIGNUP_OK"
}

POST /auth/verify Verify identity hash on-chain

Request Body

identHash*stringHash to verify

Response

{
  "success": true,
  "valid": true,
  "timestamp": "2026-05-30T10:22:00Z",
  "code": "VERIFY_OK"
}

POST /hash/seal Seal any document or file hash on-chain

Request Body

dataHash*stringSHA-256 hash of the document/file

labelstringOptional label (contract, voice, deed, etc.)

Response

{
  "success": true,
  "sealHash": "b2c3d4e5f6a1...",
  "timestamp": "2026-05-30T10:22:00Z",
  "code": "SEAL_OK"
}

Use Cases

→ Telco KYC — Verify subscribers without storing national ID numbers

→ Fintech Onboarding — AML-compliant identity binding for wallet accounts

→ Insurance Claims — Seal claim documents with tamper-proof timestamps

→ Healthcare — Patient identity verification without PII custody

→ Real Estate — Ownership transfer with IdentHash standard (KR Patent 10-2026-0068484)

Try It Now

Test the live demo at ishashsign.com or request an API key to integrate.

Live Demo →