# BigONE

**Canonical:** https://apis.io/providers/bigone/  
**Website:** https://big.one  
**APIs profiled:** 5

BigONE is a cryptocurrency exchange (big.one) offering spot trading, contract (perpetual futures) trading, instant convert (flash swap) and wallet services. Its developer program at open.big.one documents four REST APIs on api.big.one (Spot v3, Wallet v3, Convert sapi v1 and Contract v2), JWT (HS256) authentication, and WebSocket streams, and publishes the OpenAPI definitions in the bigone-eng/openapi-specs GitHub repository and the WebSocket protobuf in bigone-eng/websocket-proto.

## Kin Score — 34.5 / 100 (thin)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-6.2 from 40.7).

| Facet | Score |
|---|---|
| Discoverability | 71.4 |
| Contract Quality | 62.2 |
| Contract Governance | 22.0 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 32.7 |
| Access Clarity | 0.0 |

Regulatory layer — **Securities & Market Data**: 15.7 (matched via tags).

## Agent readiness — 38.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | verified |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | documented |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| 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 | no |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

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

## APIs (16)

- **BigONE WebSocket API** — Real-time spot market data and private order/account streams at wss://api.big.one/ws/v2 (JSON or protobuf messages, defined in the published websocket.proto), plus contract stre...
- **BigONE Account API** — Account Balance
- **BigONE Asset API** — Wallet Assets
- **BigONE Assets API** — Asset information
- **BigONE Deposit API** — Wallet Deposits
- **BigONE Funding Account API** — Funding Account Balances
- **BigONE Market Data API** — Public Market Data
- **BigONE Order API** — Order Management
- **BigONE Ping API** — The Ping API from BigONE — 1 operation(s) for ping.
- **BigONE Position API** — Position Management
- **BigONE Quote API** — Get quotes for conversion
- **BigONE Ranges API** — Trading range limits
- **BigONE Trade API** — Trade History
- **BigONE Trades API** — Execute and manage trades
- **BigONE Transfer API** — Wallet Transfers
- **BigONE Withdrawal API** — Wallet Withdrawals

## Agentic access (1)

- **Bigone Agentic Access** — 50 operations · 13 acting

## Security (2)

- **Bigone Authentication** — http · 1 scheme
- **Bigone Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Cryptocurrency, Exchange, Trading, Derivatives, Wallets, Market Data

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