# CEX.IO

**Canonical:** https://apis.io/providers/cex-io/  
**Website:** https://cex.io  
**APIs profiled:** 9

CEX.IO is a cryptocurrency exchange founded in 2013 offering spot trading, buying and selling crypto with cards and bank transfers, staking and earn products, and a Prime brokerage service. It publishes two developer surfaces: the CEX.IO Spot Trading API (REST and WebSocket under trade.cex.io/api/spot) and the legacy CEX.IO Exchange API (REST under cex.io/api and WebSocket at ws.cex.io), both authenticated with API keys and HMAC signatures.

## Kin Score — 37.9 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-7.8 from 45.7).

| Facet | Score |
|---|---|
| Discoverability | 80.4 |
| Contract Quality | 47.1 |
| Contract Governance | 22.0 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 36.9 |
| Access Clarity | 15.8 |

Regulatory layer — **Securities & Market Data**: 19.4 (matched via tags).

## Agent readiness — 22.1 (agent-aware)

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

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (9)

- **CEX.IO Accounts API** — The Accounts API from CEX.IO — 4 operation(s) for accounts.
- **CEX.IO Fees API** — The Fees API from CEX.IO — 3 operation(s) for fees.
- **CEX.IO Funding API** — The Funding API from CEX.IO — 5 operation(s) for funding.
- **CEX.IO History API** — The History API from CEX.IO — 2 operation(s) for history.
- **CEX.IO Market Data API** — The Market Data API from CEX.IO — 4 operation(s) for market data.
- **CEX.IO Orders API** — The Orders API from CEX.IO — 4 operation(s) for orders.
- **CEX.IO Private API** — The Private API from CEX.IO — 16 operation(s) for private.
- **CEX.IO Public API** — The Public API from CEX.IO — 11 operation(s) for public.
- **CEX.IO Public Market Data API** — The Public Market Data API from CEX.IO — 8 operation(s) for public market data.

## Security (2)

- **Cex Io Authentication** — 2 schemes
- **Cex Io Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Cryptocurrency, Exchange, Trading, Market Data, WebSocket, Financial Services

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