Bitget vs Kraken API

Bitget 40

Graded with the hosted lines on the UTA v3 API at api.bitget.com. No status page found (status.bitget.com does not resolve, the docs link none), so 0 for the page and 5 for no readable history; the September 2026 breach is in the deduction, not here. Rate limits are published as 6,000 per IP per minute and per-endpoint UID limits by VIP level (15). An x-mbx-used-remain-limit header is documented and the agent SDK backs off on 429, orders take a clientOid of up to 64 characters, but the breach error code and a Retry-After rule were not read (10 of 15). No SLA (0). UTA v3 is the production API (10). 40.

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.

Bitget 62

API keys with read or read-and-write permission, a passphrase, HMAC-SHA256 or RSA signing, IP binding recommended, 50 keys per UID, revocation on the management page; no OAuth and no separate withdrawal scope in the docs read (22 of 30). --read-only strips write tools at start, --paper-trading routes to demo, and high-risk writes need confirm: true (18 of 20). Tools return the exchange's own data (10). Request and response hooks are forwarded as MCP log notifications; no per-call audit log on Bitget's side was found (6 of 15). security@bitget.com in the toolkit README, no security.txt, Mandiant and SlowMist reports on the September breach, a proof-of-reserves repository, no bounty page read (6 of 20). 62.

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.

Bitget 74

The agent SDK ships openapi.yaml with 109 typed UTA v3 operations from which the tools are generated, a machine-readable contract from the vendor's own organisation though not on the docs site (20 of 25). llms.txt in the SDK and MCP repositories; the docs site has none (6 of 10). Intent tools with a discover tool that explains each verb, action and its risk level, and the server's initialize instructions state surface, modules and read-only posture (15 of 20). Typed inputs with enums and required fields from the OpenAPI source (12 of 15). Examples in the quick start and READMEs, a REST error code page in the legacy docs that we did not read in full (9 of 15). Changelog by day with preview notices and effective dates (12 of 15). 74.

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.