# ADDX

**Canonical:** https://apis.io/providers/addx/  
**Website:** https://addx.co/  
**APIs profiled:** 1

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.

## Kin Score — 27.4 / 100 (thin)

Scored 2026-09-07 under rubric 0.20.0.

| Facet | Score |
|---|---|
| Discoverability | 66.7 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 57.1 |
| Commercial Clarity | 35.5 |
| Access Clarity | 35.5 |

## Agent readiness — 10.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (1)

- **ADDX Open API** — Publicly documented REST API that connects an external system to the ADDX platform. Roughly 68 operations across five documented groups — Account Management (account, balance, E...

## Security (2)

- **Addx Authentication** — 1 scheme
- **Addx Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Addx Plans Pricing**

## Tags

Digital Securities Exchange, Private Markets, Tokenization, Alternative Investments, Wealth Management, Capital Markets, Fintech, Digital Assets, Investment Platform, Singapore

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/addx/). Scores are computed from the provider's own public artifacts under a published rubric.