aid: addx
name: ADDX
description: >-
  ADDX is a Singapore-headquartered digital securities exchange and private-markets investment platform,
  licensed by the Monetary Authority of Singapore for the issuance, custody and secondary trading of digital
  securities. Founded in 2017 as iSTOX, it tokenises and fractionalises private equity, private credit, hedge
  funds, structured products, fixed income and commercial paper so accredited investors can subscribe at
  roughly USD 10,000 rather than institutional minimums. Alongside the consumer web and mobile app, ADDX
  Advantage packages the same rails for wealth managers, brokers and external asset managers (EAMs), and the
  publicly documented ADDX Open API — an HMAC-signed REST surface of about 68 operations covering account and
  investor information, STO subscription and redemption, wallet, fiat and digital-asset flows, exchange
  order-book market data and investor reporting — lets those partners drive the platform from their own systems.
image: https://www.addx.co/images/Social_Share_Hero_image2.png
url: https://raw.githubusercontent.com/api-evangelist/addx/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-07'
modified: '2026-09-07'
tags:
- Digital Securities Exchange
- Private Markets
- Tokenization
- Alternative Investments
- Wealth Management
- Capital Markets
- Fintech
- Digital Assets
- Investment Platform
- Singapore
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: ADDX Open API
  description: >-
    Publicly documented REST API that connects an external system to the ADDX platform. Roughly 68 operations
    across five documented groups — Account Management (account, balance, EAM investor, portfolio, transaction
    and wallet detail, plus STO subscription, subsequent-subscription and redemption flows for both self and
    EAM-managed investors), Market Data (aggregated order book, market depth, market state, token list, ticker
    feed, trade feed, account balances on the trading engine), Reporting (report types, report listing,
    downloads), Fiat Flow (bank-account management, document upload, fiat deposit and withdrawal with OTP
    confirmation, wealth-manager distribute/collect) and Digital Assets (balances, deposit addresses, withdrawal
    fees, email and mobile OTP, identity verification, withdrawal confirmation). Requests are signed with an
    HMAC-SHA256 X-Signature over the timestamp and HTTP method using a Key ID and secret passphrase the user
    generates in the platform's API Settings. The base URL is deliberately not published — ADDX issues it per
    environment and per use case on request — so the documented paths are relative to a host only a provisioned
    partner holds.
  humanURL: https://api-docs.addx.co/open-api/
  image: https://www.addx.co/images/Social_Share_Hero_image2.png
  tags:
  - Digital Securities Exchange
  - Private Markets
  - Wealth Management
  - Digital Assets
  - Capital Markets
  properties:
  - type: APIReference
    url: https://api-docs.addx.co/open-api/
  - type: Authentication
    url: authentication/addx-authentication.yml
  - type: Conventions
    url: conventions/addx-conventions.yml
  - type: ErrorCatalog
    url: errors/addx-problem-types.yml
  - type: Lifecycle
    url: lifecycle/addx-lifecycle.yml
  - type: RateLimits
    url: rate-limits/addx-rate-limits.yml
  - type: DataModel
    url: data-model/addx-data-model.yml
  - type: X-MCPServerCandidate
    url: mcp/addx-mcp.yml
common:
- type: DomainSecurity
  url: security/addx-domain-security.yml
- type: Website
  url: https://addx.co/
- type: DeveloperPortal
  url: https://api-docs.addx.co/open-api/
- type: APIReference
  url: https://api-docs.addx.co/open-api/
- type: Documentation
  url: https://addx.co/en/how-addx-works/
- type: GettingStarted
  url: https://addx.co/en/get-started/
- type: SignUp
  url: https://client.addx.co/register
- type: Login
  url: https://client.addx.co/login
- type: Support
  url: https://addx.co/en/contact-us/
- type: Blog
  url: https://addx.co/en/insights/
- type: TermsOfService
  url: https://documents.addx.co/ADDX_Platform_Rules.pdf
- type: PrivacyPolicy
  url: https://addx.co/en/privacy-policy/
- type: Conformance
  url: conformance/addx-conformance.yml
- type: Compliance
  url: conformance/addx-conformance.yml
- type: Authentication
  url: authentication/addx-authentication.yml
- type: Conventions
  url: conventions/addx-conventions.yml
- type: ErrorCatalog
  url: errors/addx-problem-types.yml
- type: Lifecycle
  url: lifecycle/addx-lifecycle.yml
- type: RateLimits
  url: rate-limits/addx-rate-limits.yml
- type: Plans
  url: plans/addx-plans-pricing.yml
- type: Packages
  url: packages/addx-packages.yml
- type: DataModel
  url: data-model/addx-data-model.yml
- type: LLMsTxt
  url: llms/addx-llms.txt
- type: X-MCPServerCandidate
  url: mcp/addx-mcp.yml
x-enrichment:
  date: '2026-09-07'
  status: enriched
  artifacts_added: 13
  pass: local-v3