# Sfox

**Canonical:** https://apis.io/providers/sfox/  
**Website:** https://www.sfox.com/api/  
**APIs profiled:** 3

sFOX is a unified crypto prime brokerage and infrastructure platform for professional and institutional investors — asset managers, hedge funds, family offices, and financial institutions. It aggregates liquidity from 30+ providers across 80+ markets for smart-routed best execution, and combines that with bankruptcy-remote custody (sFOX SAFE, via SAFE Trust Company), staking, credit, and post-trade settlement in one platform. sFOX exposes a REST API, a WebSocket streaming API, and a FIX API for trading, account management, RFQ, transfers, custody, staking, market data, and reporting; a separate white-label "Connect" API covers end-user onboarding, KYC/KYB, bank linking (Plaid/Dwolla), payments, withdrawals, and SSO for businesses building crypto products.

## Kin Score — 44.7 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 44.7).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 48.9 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 47.6 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

Regulatory layer — **Securities & Market Data**: 55.0 (matched via tags).

## Agent readiness — 31.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (3)

- **sFOX REST API** — REST API for trading, order management, RFQ, account balances and transactions, transfers/deposits/withdrawals, custody (sFOX SAFE), staking, post-trade settlement, market data,...
- **sFOX WebSocket API** — Real-time streaming API for market data (order book, trades, ticker) and private account data (open orders, trades, balances, post-trade settlement). Authenticate then subscribe...
- **sFOX Connect API** — White-label REST + WebSocket API for businesses: end-user management, KYC/KYB and Enhanced Due Diligence, bank-account linking (Plaid), ACH (Dwolla) and wire payments, withdrawa...

## MCP servers (1)

- **Sfox MCP Server**

## Security (2)

- **Sfox Authentication** — apiKey · 1 scheme
- **Sfox Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Cryptocurrency, Prime Brokerage, Trading, Digital Asset Custody, Liquidity, Staking, Institutional, Financial-Services, Market Data, WebSocket, FIX

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