# HTX trading API vs KuCoin

> KuCoin scores 53.9 (D) to HTX trading's 43.3 (E) for exchange market data. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/htx-vs-kucoin
- Markdown: https://www.anchorterminal.com/compare/htx-vs-kucoin.md (~4,350 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-03

KuCoin scores 53.9 (D) on agent readiness against HTX trading API's 43.3 (E), and leads in 6 of 7 scored categories. HTX trading API leads on agent ergonomics. Both do exchange market data.

- HTX trading API: grade E, 43.3/100, rank #1166 of 1349. Markdown https://www.anchorterminal.com/tools/htx.md · JSON https://www.anchorterminal.com/api/v1/tools/htx.json
- KuCoin: grade D, 53.9/100, rank #891 of 1349. Markdown https://www.anchorterminal.com/tools/kucoin.md · JSON https://www.anchorterminal.com/api/v1/tools/kucoin.json
- Best crypto exchange APIs and MCP servers for AI agents: https://www.anchorterminal.com/best/crypto-exchanges/index.md
- All 210 exchanges comparisons: https://www.anchorterminal.com/compare/crypto-exchanges/index.md

## Which one, for what

### HTX trading API (E)

Good for: Spot and USDT-margined derivatives for agents that can hold an HTX key, with no MCP server and no testnet.

Ahead on:
- Agent ergonomics, 69 against 62

Watch for: No official MCP server; the only one in the MCP registry is a third party's read-only ticker server

### KuCoin (D)

Good for: An agent trading spot, margin and futures in a person's KuCoin account outside the restricted list, with no sandbox and no MCP server, so through the SDK or raw REST.

Ahead on:
- Reliability, 45 against 38
- Schema & documentation, 60 against 40
- Payments & pricing, 35 against 15
- Maintenance & community, 73 against 57
- Transparency & trust, 54 against 25

Watch for: No official MCP server; the registry's `kucoin` entry is a third party's keyless market-data package


## Why the edge

### Transparency & trust: KuCoin +29

- HTX trading API (25): The editorial half. A closed service whose user agreement exists but couldn't be read (script-drawn pages), so the licence clarity is unknown rather than unclear (10 of 30). The privacy policy was not read (0 of 30, unchecked). The testnet shutdown and the 2022 changelog entries are dated, with no deprecation policy (5 of 20). No subprocessor or data-location statement read (0 of 20). 10 + 0 + 5 + 0 = 15.
- KuCoin (54): The editorial half. A closed hosted service with terms that are clear on use, liability and law but name no company (12 of 30). The privacy policy gives retention periods by purpose and provider (2 years after closure, 14 months for Firebase, 3 years for Jumio, 5 years for Sumsub) and names 41 services, with no data centre locations (22 of 30). Endpoints are removed and fields deprecated in dated changelog entries with no notice period or policy (8 of 20). Third parties named by service, locations not stated beyond transfers around the globe (10 of 20). 52.

### Schema & documentation: KuCoin +20

- HTX trading API (40): No OpenAPI or other machine-readable contract found in the docs or the GitHub accounts (0). No llms.txt on htx.com, and the readable reference is a static page (0). Each endpoint states its purpose and parameters, without when-to-use guidance (12 of 20). Parameter tables carry types, required flags and enums for order types and states (10 of 15). Request and response examples throughout and error-code tables with messages (11 of 15). Versions v1 and v2 are mixed in one reference whose last changelog entry is 24 June 2022, while HTX's newer docs on htx.com couldn't be read (7 of 15). 0 + 0 + 12 + 10 + 11 + 7 = 40.
- KuCoin (60): No OpenAPI or other machine-readable contract was found; the docs link a Postman workspace and the universal SDK is generated from an internal spec (8 of 25). No llms.txt; the skills hub ships Markdown SKILL.md files with endpoint tables for seven product areas, read-only (6 of 10). One docs page per endpoint with a description, permission and weight, but no when-to-use guidance (12 of 20). Typed parameter tables with enums for type and side and required flags (11 of 15). Request and response examples per endpoint and a unified six-digit error code scheme introduced with V2 (10 of 15). Dated changelog with V1 to V2 versioning (13 of 15). 60.

### Payments & pricing: KuCoin +20

- HTX trading API (15): No machine payment protocol (0). The fee schedule at htx.com/fee is drawn by script and answered no text, so no price is recorded first-hand (0 of 20, unchecked). Public market data needs no key, card or account; trading needs a verified and funded account. Judgement call (15 of 20). A person must sign up in a browser and pass identity checks (0). 0 + 0 + 15 + 0 = 15.
- KuCoin (35): No machine payment protocol (0). The spot base fee is stated in support articles without login, the futures base rate and the full tier table sit in images or behind script (15 of 20). Market data needs no key, no card is asked for at sign-up (20). A person registers, verifies identity and mints the key in a browser (0). 35.

### Maintenance & community: KuCoin +16

- HTX trading API (57): Read as a closed service. The readable changelog ends on 24 June 2022, but the official contract SDKs were pushed on 21 October 2026 and the spot SDKs in April and July 2026, so the API surface is still being maintained; judgement call (20 of 30). SDK pushes on 30 July, 23 August and 21 October 2026 are commits, not releases (10 of 20). A Telegram group for API support and a support centre, neither tested; GitHub issues not read (8 of 15). Official SDKs in five languages (15). No CI seen, dependencies not checked (4 of 10). 20 + 10 + 8 + 15 + 4 = 57.
- KuCoin (73): Read as a closed hosted service. The changelog's newest past entry is 2 November 2026 and the universal SDK was pushed 15 September (30). Nine dated changelog entries since 5 August 2026 (20). A Telegram API group (t.me/KuCoin_API) and api@kucoin.com for limit requests, no public issue tracker for the API; the SDK repository's issues were not checked (10 of 25). Official SDKs current in five languages, no MCP registry presence (13 of 15). No package health signal checked (0 of 10). 73.

### Reliability: KuCoin +7

- HTX trading API (38): Read with the hosted lines. No status page found; status.htx.com does not resolve and nothing on htx.com was readable (0). No readable incident history (5). Rate limits documented per endpoint with numbers, 100 order calls per 2 seconds per UID and so on, with remaining-quota headers (15). No 429 or Retry-After behaviour is documented and the only limit error named is 1006 for conditional orders; a client-order-id unique within 8 hours and an idempotent withdrawal id give safe retries on writes (8 of 15). No SLA found (0). The spot and swap APIs are generally available (10). 0 + 5 + 15 + 8 + 0 + 10 = 38.
- KuCoin (45): Graded with the hosted lines on the API at api.kucoin.com. No status page found (status.kucoin.com does not resolve, the docs link none), so 0 for the page and 5 for no readable history. Rate limits are published per VIP level with per-endpoint weights and IP limits for public endpoints (15). Every response carries gw-ratelimit-limit, gw-ratelimit-remaining and gw-ratelimit-reset, 429000 is documented with a wait rule, and orders take a clientOid the docs recommend as a UUID (15). No SLA (0). The UTA V2 API is the production surface (10). 45.

### Agent ergonomics: HTX trading API +7

- HTX trading API (69): Graded on the REST API. Responses can be sized with depth types, size and limit parameters on books, candles and history (15 of 25). Paging by from, size and direct on orders and history (14 of 20). Errors return err-code strings with messages, listed in tables (13 of 20). A client-order-id unique within 8 hours and idempotent withdrawal ids make retries safe, with no idempotency header on other writes (14 of 20). Few required parameters and official SDKs in five languages (13 of 15). 15 + 14 + 13 + 14 + 13 = 69.
- KuCoin (62): Read for the API alone, since there is no MCP server. Responses take limit and cursor parameters on list endpoints and the order book depth is a parameter (14 of 25). Pagination and symbol filters on orders, fills and ledgers (15 of 20). Codes and messages per response, with the V2 scheme claimed to be clearer; the rate-limit page's own examples contradict its table, which costs an agent a turn (12 of 20). clientOid on orders makes retries safe; no MCP annotations to read (10 of 20). Three required fields on a spot order, official SDKs in five languages (11 of 15). 62.

## Score by category

| Category | Weight | HTX trading API | KuCoin | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 38 | 45 | KuCoin +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 40 | 60 | KuCoin +20 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 62 | HTX trading API +7 |
| Security & auth | 14% (17.5 this run) | 51 | 55 | KuCoin +4 |
| Payments & pricing | 10% (12.5 this run) | 15 | 35 | KuCoin +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 57 | 73 | KuCoin +16 |
| Transparency & trust | 7% (8.8 this run) | 25 | 54 | KuCoin +29 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **43.3 · E** | **53.9 · D** | |

## Facts side by side

| Fact | HTX trading API | KuCoin |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | HTX | KuCoin |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Tools exposed | 0 | none |
| Read-only variant documented | no | yes |
| llms.txt | no | no |
| Last release | 2026-10-21 | 2026-11-02 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | no document linked | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | yes | yes |
| Popularity | 684 stars | 55 stars |

## Verdicts

**HTX trading API.** HTX's API has per-endpoint rate limits, read, trade and withdraw key permissions with IP binding, and SDKs in five languages. No official MCP server exists, the testnet is closed, the public reference is still Huobi's with a 2022 changelog, and the fee schedule, terms and restricted countries are on script-drawn pages we couldn't read.

**KuCoin.** KuCoin publishes pooled rate limits with remaining and reset headers, scoped keys where withdrawals and transfers need an IP allow-list, an official SDK in five languages and read-only agent skills. It runs no MCP server, has no sandbox, status page or OpenAPI file, and its terms name no legal entity.

## Before you call either

### HTX trading API

1. Ask the operator for a key with Read and Trade only and bound to your IP addresses; a key without IP binding expires after 90 days
2. Send a fresh client-order-id of up to 64 characters with every order and reuse it only on retry; a repeat within 8 hours answers invalid.client.order.id
3. Watch X-HB-RateLimit-Requests-Remain and pace at under 100 order calls per 2 seconds per UID; limits are shared by every key on the account
4. There is no testnet; try order logic with the smallest size the market allows
5. Confirm the person's country is served before trading; the restricted list in the user agreement couldn't be read here

### KuCoin

1. Mint a key with General only for research; add Spot or Futures only with an IP allow-list, since unbound trading keys are disabled after 30 days of inactivity
2. Send a UUID clientOid on every order and keep it for the retry, and read the order back by clientOid before placing again
3. Budget requests by weight against gw-ratelimit-remaining and sleep for gw-ratelimit-reset milliseconds on 429000; sub-accounts share the pool
4. There is no sandbox, so rehearse with the smallest order size on a dedicated sub-account
5. Use the UTA V2 endpoints and hosts; the Classic API loses endpoints without notice, as the margin credit endpoints did on 21 October 2026

## Questions

### Which is better for AI agents, HTX trading API or KuCoin?

KuCoin scores 53.9 (D) on agent readiness against HTX trading API's 43.3 (E), and leads in 6 of 7 scored categories. HTX trading API leads on agent ergonomics.

### Do HTX trading API and KuCoin need an API key?

Both need an API key.

### Can an agent call HTX trading API and KuCoin without installing anything?

No hosted endpoint is listed for HTX trading API. No hosted endpoint is listed for KuCoin.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/htx-vs-kucoin.json, and with the fewest tokens: https://www.anchorterminal.com/compare/htx-vs-kucoin.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "htx", "b": "kucoin"}`. From a terminal: `anchor compare htx kucoin`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/htx.json and https://www.anchorterminal.com/api/v1/tools/kucoin.json

## Other comparisons with HTX trading API or KuCoin

- [Bitfinex API vs HTX trading API](https://www.anchorterminal.com/compare/bitfinex-vs-htx.md)
- [Bitfinex API vs KuCoin](https://www.anchorterminal.com/compare/bitfinex-vs-kucoin.md)
- [Bitget vs HTX trading API](https://www.anchorterminal.com/compare/bitget-vs-htx.md)
- [Bitget vs KuCoin](https://www.anchorterminal.com/compare/bitget-vs-kucoin.md)
- [Bithumb Open API vs HTX trading API](https://www.anchorterminal.com/compare/bithumb-vs-htx.md)
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- [Bitstamp API vs HTX trading API](https://www.anchorterminal.com/compare/bitstamp-vs-htx.md)
- [Bitstamp API vs KuCoin](https://www.anchorterminal.com/compare/bitstamp-vs-kucoin.md)
- [Bybit vs HTX trading API](https://www.anchorterminal.com/compare/bybit-vs-htx.md)
- [Bybit vs KuCoin](https://www.anchorterminal.com/compare/bybit-vs-kucoin.md)
- [Crypto.com Exchange API vs HTX trading API](https://www.anchorterminal.com/compare/crypto-com-exchange-vs-htx.md)
- [Crypto.com Exchange API vs KuCoin](https://www.anchorterminal.com/compare/crypto-com-exchange-vs-kucoin.md)
- [Gate vs HTX trading API](https://www.anchorterminal.com/compare/gate-io-vs-htx.md)
- [Gate vs KuCoin](https://www.anchorterminal.com/compare/gate-io-vs-kucoin.md)
- [Gemini Exchange API vs HTX trading API](https://www.anchorterminal.com/compare/gemini-exchange-vs-htx.md)
- [Gemini Exchange API vs KuCoin](https://www.anchorterminal.com/compare/gemini-exchange-vs-kucoin.md)
- [HTX trading API vs Hyperliquid](https://www.anchorterminal.com/compare/htx-vs-hyperliquid.md)
- [HTX trading API vs Kraken API](https://www.anchorterminal.com/compare/htx-vs-kraken.md)
- [HTX trading API vs MEXC API](https://www.anchorterminal.com/compare/htx-vs-mexc.md)
- [HTX trading API vs OKX API](https://www.anchorterminal.com/compare/htx-vs-okx.md)
- [HTX trading API vs Uniswap Trading API](https://www.anchorterminal.com/compare/htx-vs-uniswap.md)
- [HTX trading API vs Upbit Open API](https://www.anchorterminal.com/compare/htx-vs-upbit.md)
- [KuCoin vs MEXC API](https://www.anchorterminal.com/compare/kucoin-vs-mexc.md)
- [KuCoin vs OKX API](https://www.anchorterminal.com/compare/kucoin-vs-okx.md)
- [KuCoin vs Uniswap Trading API](https://www.anchorterminal.com/compare/kucoin-vs-uniswap.md)
- [KuCoin vs Upbit Open API](https://www.anchorterminal.com/compare/kucoin-vs-upbit.md)
- [Binance API vs HTX trading API](https://www.anchorterminal.com/compare/binance-vs-htx.md)
- [Binance API vs KuCoin](https://www.anchorterminal.com/compare/binance-vs-kucoin.md)
- [Coinbase Advanced Trade API vs HTX trading API](https://www.anchorterminal.com/compare/coinbase-advanced-trade-vs-htx.md)
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- [Coinbase MCP server (Coinbase for Agents) vs KuCoin](https://www.anchorterminal.com/compare/coinbase-mcp-vs-kucoin.md)
- [Kraken API vs KuCoin](https://www.anchorterminal.com/compare/kraken-vs-kucoin.md)
- [Deribit vs HTX trading API](https://www.anchorterminal.com/compare/deribit-vs-htx.md)
- [Deribit vs KuCoin](https://www.anchorterminal.com/compare/deribit-vs-kucoin.md)
- [dYdX vs HTX trading API](https://www.anchorterminal.com/compare/dydx-vs-htx.md)
- [dYdX vs KuCoin](https://www.anchorterminal.com/compare/dydx-vs-kucoin.md)
- [Hyperliquid vs KuCoin](https://www.anchorterminal.com/compare/hyperliquid-vs-kucoin.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp