HTX

HTX (formerly Huobi Global) is a cryptocurrency exchange founded in 2013 that offers spot trading, futures and derivatives, margin trading, trading bots, copy trading, and earn/staking products across BTC, ETH, XRP and 600+ digital assets. HTX exposes a public developer platform (HTX Open Platform) with a REST API and a WebSocket streaming API covering market data, account and wallet management, sub-user administration, spot and conditional order placement, and cross/isolated margin lending. Requests are authenticated with an AccessKey and an HMAC-SHA256 (Signature Version 2) request signature. Official client SDKs are published under the HuobiRDCenter GitHub organization for Java, Python, Go, C++ and C#, with separate contract/futures variants. HTX was surfaced as a portfolio company of Hongshan (formerly Sequoia Capital China).

HTX is listed with 2 APIs on the APIs.io network, including Spot REST API, and 1 more. Tagged areas include Company, Technology, Cryptocurrency, Cryptocurrency Exchange, and Trading.

The HTX catalog on APIs.io includes 1 event-driven AsyncAPI specification.

HTX’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, signup flow, changelog, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

44.3/100 developing ▲ 12.5 Agent 22/100 agent aware Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

2 APIs

Company Technology Cryptocurrency Cryptocurrency Exchange Trading Digital Assets Blockchain Financial Services Market Data WebSocket

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 44.3/100 · developing

Contract Quality 9.3 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 5.8 / 17

Operational Transparency 5.2 / 11

Contract Governance 0.5 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/htx: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

HTX Spot REST API

The HTX Spot REST API provides HTTP access to reference data (system status, symbols, currencies, chains), market data (klines, tickers, depth, trades, 24h summaries), account a...

HTX WebSocket API

The HTX WebSocket API provides a two-way real-time channel for subscribing to market data (klines, market depth, trade detail, best bid/offer) and to authenticated account and o...

Rate Limits 1

Documented rate limits and quota policies.

Htx Rate Limits

2 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Huobi / HTX WebSocket API

AsyncAPI 2.6 specification for Huobi (HTX) public WebSocket Market Data API and WebSocket v2 Asset & Order subscription API. ## Envelope conventions ### Market data (v1, /ws) - ...

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Htx Authentication

apiKey · 1 scheme

SECURITY

Htx Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

IntegrationEdges

IntegrationEdges

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Deprecation

Support

ChangeLog

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: htx
name: HTX
description: HTX (formerly Huobi Global) is a cryptocurrency exchange founded in 2013 that offers spot trading, futures and
  derivatives, margin trading, trading bots, copy trading, and earn/staking products across BTC, ETH, XRP and 600+ digital
  assets. HTX exposes a public developer platform (HTX Open Platform) with a REST API and a WebSocket streaming API covering
  market data, account and wallet management, sub-user administration, spot and conditional order placement, and cross/isolated
  margin lending. Requests are authenticated with an AccessKey and an HMAC-SHA256 (Signature Version 2) request signature.
  Official client SDKs are published under the HuobiRDCenter GitHub organization for Java, Python, Go, C++ and C#, with separate
  contract/futures variants. HTX was surfaced as a portfolio company of Hongshan (formerly Sequoia Capital China).
url: https://raw.githubusercontent.com/api-evangelist/htx/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://www.htx.com/favicon.ico
x-type: company
x-source: vc-portfolio
x-backed-by:
- hongshan
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Technology
- Cryptocurrency
- Cryptocurrency Exchange
- Trading
- Digital Assets
- Blockchain
- Financial Services
- Market Data
- WebSocket
tags_raw:
- Company
- Technology
- Cryptocurrency
- Crypto Exchange
- Trading
- Digital Assets
- Blockchain
- Financial Services
- Market Data
- WebSocket
- Financial-Services
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Deprecation
  url: lifecycle/htx-lifecycle.yml
- type: IntegrationEdges
  url: integrations/htx-integration-edges.yml
- url: https://www.htx.com/news/
  type: Blog
- type: Website
  url: https://htx.com
- type: DeveloperPortal
  url: https://www.htx.com/en-us/opend/
- type: Documentation
  url: https://www.htx.com/en-us/opend/newApiPages/
- type: APIReference
  url: https://huobiapi.github.io/docs/spot/v1/en/
- type: GettingStarted
  url: https://www.htx.com/support/360000203002
- type: GitHubOrganization
  url: https://github.com/HuobiRDCenter
- type: Support
  url: https://www.htx.com/support/
- type: TermsOfService
  url: https://www.htx.com/support/360000298561/
- type: PrivacyPolicy
  url: https://www.htx.com/en-us/about/privacy/
- type: SignUp
  url: https://www.htx.com/en-us/register/
- type: ChangeLog
  url: changelog/htx-changelog.yml
- type: Packages
  url: packages/htx-packages.yml
- type: SDKs
  url: packages/htx-packages.yml
- type: Authentication
  url: authentication/htx-authentication.yml
- type: Conventions
  url: conventions/htx-conventions.yml
- type: ErrorCatalog
  url: errors/htx-error-codes.yml
- type: Lifecycle
  url: lifecycle/htx-lifecycle.yml
- type: RateLimits
  url: rate-limits/htx-rate-limits.yml
- type: Conformance
  url: conformance/htx-conformance.yml
- type: DomainSecurity
  url: security/htx-domain-security.yml
apis:
- aid: htx:htx-spot-api
  name: HTX Spot REST API
  humanURL: https://www.htx.com/en-us/opend/newApiPages/
  baseURL: https://api.huobi.pro
  tags:
  - Market Data
  - Account
  - Wallets
  - Order
  - Trading
  - Margin
  - Sub-user
  tags_raw:
  - Market Data
  - Account
  - Wallet
  - Orders
  - Trading
  - Margin
  - Sub-user
  properties:
  - url: https://www.htx.com/en-us/opend/newApiPages/
    type: Documentation
  - url: https://huobiapi.github.io/docs/spot/v1/en/
    type: APIReference
  - url: asyncapi/htx-websocket-asyncapi.yml
    type: AsyncAPI
    x-moved-from: huobi:asyncapi/huobi-asyncapi.yml (consolidated into htx 2026-10-13, approved by Kin Lane)
  description: The HTX Spot REST API provides HTTP access to reference data (system status, symbols, currencies, chains),
    market data (klines, tickers, depth, trades, 24h summaries), account and balance information, wallet deposits/withdrawals,
    sub-user management, spot and conditional order placement and querying, and cross/isolated margin lending. Base hosts
    are api.huobi.pro and the AWS-optimized api-aws.huobi.pro. Authentication uses AccessKeyId plus an HMAC-SHA256 Signature
    Version 2 request signature.
- aid: htx:htx-websocket-api
  name: HTX WebSocket API
  humanURL: https://www.htx.com/en-us/opend/newApiPages/
  baseURL: https://api.huobi.pro
  tags:
  - WebSocket
  - Market Data
  - Streaming
  - Account
  - Order
  tags_raw:
  - WebSocket
  - Market Data
  - Streaming
  - Account
  - Orders
  properties:
  - url: https://www.htx.com/en-us/opend/newApiPages/
    type: Documentation
  - url: https://huobiapi.github.io/docs/spot/v1/en/
    type: APIReference
  description: The HTX WebSocket API provides a two-way real-time channel for subscribing to market data (klines, market depth,
    trade detail, best bid/offer) and to authenticated account and order update topics. Public market data streams over wss://api.huobi.pro/ws
    and authenticated account/order streams over wss://api.huobi.pro/ws/v2, with heartbeat and rate-limit controls.
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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