# HTX trading API vs Kraken API

> Kraken scores 71 (BB) 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-kraken
- Markdown: https://www.anchorterminal.com/compare/htx-vs-kraken.md (~4,700 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

Kraken API scores 71 (BB) on agent readiness against HTX trading API's 43.3 (E), and leads in every scored category. 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
- Kraken API: grade BB, 71/100, rank #159 of 1349. Markdown https://www.anchorterminal.com/tools/kraken.md · JSON https://www.anchorterminal.com/api/v1/tools/kraken.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.

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

### Kraken API (BB)

Good for: An agent that trades spot, xStocks, forex or futures on a person's Kraken account from a local machine, with paper trading to test first and an approval gate on live orders.

Ahead on:
- Reliability, 67 against 38
- Schema & documentation, 80 against 40
- Agent ergonomics, 79 against 69
- Security & auth, 80 against 51
- Payments & pricing, 40 against 15
- Maintenance & community, 81 against 57
- Transparency & trust, 65 against 25

Also in its favour:
- Agent-ready, a grade of BB or better
- Runs on your own machine
- Free to start without a card

Watch for: No self-service spot sandbox; the spot UAT environment is on request through an account manager, and paper trading lives in the CLI


## Why the edge

### Schema & documentation: Kraken API +40

- 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.
- Kraken API (80): No OpenAPI file was found for the REST API in the docs read; the CLI's agents/tool-catalog.json gives JSON Schema inputs for all 188 commands and the 152 MCP tools (15 of 25). The docs serve Markdown twins such as quickstart.md and the CLI ships llms.txt, AGENTS.md and CONTEXT.md (10). Endpoint pages and guides on order lifecycle, errors and rate limits say what each call does, with less on when not to use one (15 of 20). Enums for order types, time in force and flags, and enums and required fields in the tool catalogue (12 of 15). Python, Node.js and cURL examples, an errors guide and the CLI's error-catalog.json with retry guidance (13 of 15). A changelog of 120 dated entries with deprecations dated (15). 15 + 10 + 15 + 12 + 13 + 15 = 80.

### Transparency & trust: Kraken API +40

- 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.
- Kraken API (65): The editorial half. A closed service with clear terms naming regional Payward entities under California law; the CLI is MIT (15 of 30). The privacy notice was not read (5 of 30). The changelog dates deprecations and the terms carry a last-updated date (16 of 20). No subprocessor or data-location statement read (0 of 20). 15 + 5 + 16 + 0 = 36.

### Reliability: Kraken API +29

- 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.
- Kraken API (67): Read with the hosted lines on the spot API. status.kraken.com is a Statuspage site with REST, WebSocket and FIX components (20). The incidents feed read covers 4 September to 3 November 2026. On 30 October spot and derivatives clients could not connect or submit orders across web, mobile, REST, WebSocket and FIX for 59 minutes 39 seconds, rated minor by Kraken; on 28 October some FIX clients were rejected on reconnection for 1 hour 59 minutes while other interfaces worked; the futures engine was degraded for 3 minutes on 13 October. A whole-exchange order outage 21 seconds short of an hour is read as one major (10 of 30). Numeric limits per key by tier and per pair for the matching engine (15). EAPI:Rate limit exceeded and EService:Throttled with a retry timestamp, a client order id and a validate flag on orders, but no Retry-After header (12 of 15). No SLA (0). Generally available (10). 20 + 10 + 15 + 12 + 0 + 10 = 67.

### Security & auth: Kraken API +29

- HTX trading API (51): HMAC-signed keys with Read, Trade and Withdraw permissions, sub-user keys without Withdraw, up to 20 bound IPs, revocation in the account and a 90-day expiry without IP binding. The AccessKeyId and the HMAC signature travel as query parameters; the secret does not, so no deduction for a secret in the URL (24 of 30). Read-only keys and withdraw-free keys exist; no server-side confirmation for orders or withdrawals (14 of 20). The API returns the exchange's own data, no untrusted content (10). No per-call log or key-use history found for the operator (3 of 15). No security.txt, disclosure policy or certification found on the pages that loaded (0 of 20). 24 + 14 + 10 + 3 + 0 = 51.
- Kraken API (80): Keys with nine named permissions, optional expiry, IP restriction and nonce window, plus an OAuth sign-in from the CLI (authorisation code with PKCE, public client) that mints a no-withdrawal key expiring within 90 days or a read-only key (30). Read-only and no-withdrawal keys, position limits and pair allowlists in account settings, and MCP approval prompts for 33 dangerous tools (18 of 20). The API returns no untrusted content; the CLI docs warn that the feedback tool uploads a local file without approval (10). Keys and their permissions are listed in settings and ledgers record activity, but no per-call log for the operator was found (6 of 15). A valid security.txt, a bug bounty policy page, SECURITY.md and a secure SDLC workflow in the CLI; certifications not read (16 of 20). 30 + 18 + 10 + 6 + 16 = 80.

### Payments & pricing: Kraken API +25

- 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.
- Kraken API (40): No machine payment protocol (0). Maker and taker fees by tier published without login (20). Public market data, paper trading and the futures demo need no account or card (20). A person signs up, verifies and mints a key or approves the OAuth sign-in (0). 0 + 20 + 20 + 0 = 40.

### Maintenance & community: Kraken API +24

- 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.
- Kraken API (81): Read as a closed service with an open-source client. Changelog entry of 27 October 2026 and kraken-cli v0.5.1 on 29 October (30). Fourteen changelog entries since 19 August 2026 and CLI tags on 6 and 7 August and 28 and 29 October (20). A public changelog, api@kraken.com, a status page and a CLI repository merging pull requests at the end of October; issue replies not read (11 of 15). An official Rust SDK pushed in October 2026 and a Go module from January; the MCP server is not in the official registry (12 of 15). The CLI has release and secure SDLC workflows, deny.toml and a pinned toolchain; the SDK's CI not read (8 of 10). 30 + 20 + 11 + 12 + 8 = 81.

## Score by category

| Category | Weight | HTX trading API | Kraken API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 38 | 67 | Kraken API +29 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 40 | 80 | Kraken API +40 |
| Agent ergonomics | 13% (16.2 this run) | 69 | 79 | Kraken API +10 |
| Security & auth | 14% (17.5 this run) | 51 | 80 | Kraken API +29 |
| Payments & pricing | 10% (12.5 this run) | 15 | 40 | Kraken API +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 57 | 81 | Kraken API +24 |
| Transparency & trust | 7% (8.8 this run) | 25 | 65 | Kraken API +40 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **43.3 · E** | **71 · BB** | |

## Facts side by side

| Fact | HTX trading API | Kraken API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | HTX | Payward, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | stdio |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | Proprietary hosted service under Kraken's Global Terms of Service (30 October 2026). kraken-cli, which carries the kraken-mcp server, is MIT |
| Tools exposed | 0 | 152 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2026-10-21 | 2026-10-29 |
| Terms last updated | no date given | 2026-10-30 |
| Privacy policy last updated | no document linked | 2026-10-21 |
| 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 | yes |
| Terms or service can change without notice | yes | yes |
| Arbitration or class-action waiver | yes | yes |
| Popularity | 684 stars | 795 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.

**Kraken API.** Kraken pairs a documented REST, WebSocket and FIX API with the open-source kraken-cli, whose kraken-mcp server gates 33 dangerous tools behind approval and signs in by OAuth with a no-withdrawal key. Spot has no self-service sandbox, no OpenAPI file was found, and a 59-minute connectivity outage hit every interface on 30 October 2026.

## 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

### Kraken API

1. Start kraken-mcp with -s market,paper,feedback or the default services; add trade only with a least-privilege key, and never pass --allow-dangerous on an agent that reads untrusted input
2. Ask the person to run kraken auth login in their own terminal; it needs a browser and saves a no-withdrawal key that expires in 90 days at most
3. Send a fresh --cl-ord-id on each order and run it with --validate first; after a network error look the order up before sending it again
4. Keep the nonce strictly increasing per key and stay under the tier's counter, since EAPI:Rate limit exceeded has no Retry-After header
5. Test strategies in a paper workspace, which fills at live prices with no account, before a live workspace

## Questions

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

Kraken API scores 71 (BB) on agent readiness against HTX trading API's 43.3 (E), and leads in every scored category.

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

HTX trading API needs an API key. Kraken API takes an API key or an OAuth sign-in.

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

No hosted endpoint is listed for HTX trading API. Kraken API runs on your own machine, with no hosted endpoint listed.


## For agents

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

## Other comparisons with HTX trading API or Kraken API

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