# HashKey Cloud (HashQuark)

**Canonical:** https://apis.io/providers/hashquark/  
**Website:** https://www.hashkey.cloud  
**APIs profiled:** 2

HashKey Cloud, formerly HashQuark, is a Hong Kong-based blockchain infrastructure and Web3 staking provider (part of HashKey Group) that runs enterprise-grade validator nodes across 50+ mainstream proof-of-stake public chains including Ethereum, Cosmos, Solana, Polkadot, Avalanche, Sui and BNB Chain. It exposes a developer platform for institutional staking: a Staking API to onboard users, generate deposits, assign and exit validators and drive pooled staking; a Data API to track node status and daily/monthly/quarterly/ annual reward data; plus a dashboard, a Babylon BTC staking flow and a first-party Go SDK. Requests are authenticated with a custom Quark-Keccak256-ECDSA request-signing scheme keyed to an Ethereum keypair. Originally added to the API Evangelist network as a portfolio-lead stub (surfaced via Qiming), now enriched from HashKey Cloud's public developer surface.

## Kin Score — 22.5 / 100 (emerging)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 22.5).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 59.5 |
| Commercial Clarity | 10.5 |
| Access Clarity | 10.5 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| 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 |

## Access

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

## APIs (2)

- **HashKey Cloud Staking API** — Institutional staking API to onboard broker users, generate and track deposits, assign/exit validators, drive pooled staking and Babylon BTC staking across supported proof-of-st...
- **HashKey Cloud Data API** — Reporting API for node status and staking reward data (daily, monthly, quarterly and annual rewards) for integrated staking users. Shares the Quark-Keccak256-ECDSA authenticatio...

## Security (2)

- **Hashquark Authentication** — http · 1 scheme
- **Hashquark Domain Security** — TLSv1.2 · HSTS · DMARC

## Tags

Company, Blockchain, Staking, Web3, Validators, Cryptocurrency, Node Infrastructure, Proof of Stake, Ethereum, DeFi

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