# MEXC API vs OKX API (slim)

> OKX scores 64.3 (B) to MEXC's 56.3 (C) for exchange market data. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/mexc-vs-okx.md (~4,350 tokens) · this version ~2,180 tokens · JSON https://www.anchorterminal.com/compare/mexc-vs-okx.json · canonical https://www.anchorterminal.com/compare/mexc-vs-okx
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-04
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

OKX API scores 64.3 (B) on agent readiness against MEXC API's 56.3 (C), and leads in 6 of 7 scored categories. MEXC API leads on payments & pricing. Both do exchange market data.

- MEXC API: C 56.3, rank #743 of 1349 · https://www.anchorterminal.com/tools/mexc.min.md
- OKX API: B 64.3, rank #432 of 1349 · https://www.anchorterminal.com/tools/okx.min.md
- MEXC API, good for Spot and futures for agents in served countries that want a vendor-built MCP server with read-only and confirmation modes. Ahead on Payments & pricing, 31 against 20.
- OKX API, good for An agent trading spot, perpetuals, futures or options on a person's OKX account from a local machine, with demo trading to test first and grid or DCA bots through the kit. Ahead on Reliability, 65 against 43; Schema & documentation, 73 against 64; Agent ergonomics, 77 against 64; Maintenance & community, 81 against 75. Also Free to start without a card.

| Category | MEXC API | OKX API |
| --- | --- | --- |
| Reliability (16%) | 43 | 65 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 64 | 73 |
| Agent ergonomics (13%) | 64 | 77 |
| Security & auth (14%) | 65 | 68 |
| Payments & pricing (10%) | 31 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 75 | 81 |
| Transparency & trust (7%) | 58 | 62 |

| Fact (where they differ) | MEXC API | OKX API |
| --- | --- | --- |
| Vendor | MEXC (Comoros) Ltd | OKX |
| Licence | none | Proprietary hosted service under OKX's Terms of Service (29 October 2026) and API Agreement (28 July 2026). The Agent Trade Kit (MCP server, CLI and skills) is MIT |
| Tools exposed | 299 | 170 |
| Last release | 2026-10-23 | 2026-10-28 |
| Terms last updated | 2026-10-13 | 2026-10-29 |
| Privacy policy last updated | 2026-06-01 | couldn't be read |
| Terms restrict automated access | yes | not found in the text |
| Popularity | 315 stars | 499 stars, 1.8k npm/wk |

Why the edge:
- Reliability, OKX API +22: MEXC API 43 (Read with the hosted lines. No status page found; status.mexc.com does not resolve and llms.txt points to a maintenance-updates feed (0). No readable incident history (5). Rate limits documented with numbers, 300 weight per 10 seconds per IP, 500 per UID, 12 order requests a second per UID, 100 WebSocket messages a second (15). 429 and 418 carry Retry-After with ban lengths stated, a 5xx is to be treated as unknown rather than failed, an order-test endpoint exists, and newClientOrderId is optional with no idempotency promise (13 of 15). No SLA found (0). Spot and futures are generally available, futures order placement having reopened on 31 March 2026 after being closed since July 2022 (10). 0 + 5 + 15 + 13 + 0 + 10 = 43.); OKX API 65 (Read with the hosted lines on the V5 REST API. okx.com/status is OKX's own page with issue descriptions, maintenance notices and deposit and withdrawal status, but no component history or feed (10 of 20). It lists no incident between 5 August and 3 November 2026; its newest entry is from March 2024, and whether every incident reaches the page cannot be told, so read as clean with a doubt (20 of 30). Rate limits per endpoint, per User ID and per sub-account with numbers, and WebSocket limits (15). Error 50011 on a limit, a clOrdId on orders and a cap of 3 amendments in flight, but no Retry-After or backoff guidance found (10 of 15). No SLA (0). Generally available (10). 10 + 20 + 15 + 10 + 0 + 10 = 65.)
- Agent ergonomics, OKX API +13: MEXC API 64 (Graded on the REST API with the CLI's MCP mode. Responses take limit parameters and the MCP read-only market subset is 22 tools, but a full spot MCP category lists 123 tools (15 of 25). startTime, endTime and limit on history, symbol filters on open orders (14 of 20). Numeric codes with messages, a 30035 order-limit code added 23 October 2026, 5xx guidance (14 of 20). newClientOrderId is optional with no idempotency guarantee; the CLI adds --dry-run and a confirmation step (10 of 20). Few required parameters; SDKs in five languages whose repository was last pushed in February 2024 (11 of 15). 15 + 14 + 14 + 10 + 11 = 64.); OKX API 77 (limit parameters on books, candles and history, and in the kit --modules and --read-only narrow 170 tools to the three default modules; no field selection (17 of 25). after, before and limit cursors on history endpoints (18 of 20). Numeric codes with messages, such as 51020 for an invalid quantity, and the kit returns a structured error block with code, message and endpoint (17 of 20). clOrdId on orders, batch endpoints and a cap of 3 amendments in flight; the kit sets readOnlyHint on query tools but destructiveHint false on order tools and has no idempotency key (13 of 20). python-okx, the CLI and a demo profile, with passphrase and HMAC signing on every private call (12 of 15). 17 + 18 + 17 + 13 + 12 = 77.)
- Payments & pricing, MEXC API +11: MEXC API 31 (No machine payment protocol (0). Fees published without login on MEXC's own fee guide (20 October 2026) and a 2024 announcement, with a separate API futures schedule; the fee page itself is drawn by script (16 of 20). Public market data needs no key or card; trading needs a verified and funded account. Judgement call (15 of 20). A person must sign up in a browser, and futures need identity verification (0). 0 + 16 + 15 + 0 = 31.); OKX API 20 (No machine payment protocol (0). The fee table loads by script and the fee FAQ defers to the logged-in view, so no rate was read (0 of 20, unchecked). Public market data and demo trading need no funded account or card (20). A person signs up, verifies and mints a key (0). 0 + 0 + 20 + 0 = 20.)
- Schema & documentation, OKX API +9: MEXC API 64 (No OpenAPI found; a Postman collection and the CLI's 25 capability reference files are the nearest machine-readable contract (5 of 25). llms.txt on mexc.com, written for assistants and pointing at the API docs and legal pages (7 of 10). Per-endpoint pages with purpose, parameters and permissions, without when-not-to-use guidance (13 of 20). Typed parameters with enums for order types, statuses and intervals (11 of 15). Examples on each endpoint and a separate error-code page with numeric codes and messages (13 of 15). Versioned API (v3) with a dated changelog of 72 entries to 23 October 2026 (15). 5 + 7 + 13 + 11 + 13 + 15 = 64.); OKX API 73 (No OpenAPI file was found in the V5 docs; the kit's tool definitions are typed TypeScript with annotations, and the organisation has an undescribed ai-builder-openapi-md repository we did not read (12 of 25). okx.com/llms.txt exists and links the API and Agent Trade Kit pages, though the V5 docs have no Markdown twins (5 of 10). Each endpoint states its rate limit, rule, parameters and notes (15 of 20). Enums for ordType, tdMode and instType with required flags (12 of 15). Request and response examples per endpoint and an error code list with messages (14 of 15). A dated changelog with an upcoming-changes section that labels breaking changes and dates sunsets (15). 12 + 5 + 15 + 12 + 14 + 15 = 73.)
- Maintenance & community, OKX API +6: MEXC API 75 (Read as a closed service. Last dated change 23 October 2026 in both the spot and futures logs (30). Spot entries on 14 August, 24 August, 11 September and 23 October 2026, futures on 1 September, 11 September, 19 October and 23 October (20). An API support Telegram group, a ticket form and dated changelogs; GitHub issues not read (10 of 15). The official SDK repository was last pushed in February 2024 while the CLI is current (10 of 15). The CLI ships platform binaries with no dependencies and no public repository or CI; the SDK is stale (5 of 10). 30 + 20 + 10 + 10 + 5 = 75.); OKX API 81 (Read as a closed service with an open-source kit. Changelog entry of 27 October 2026 and kit v1.5.0 on 28 October (30). Changelog entries on 3, 6, 11, 18, 20 and 26 August, 15, 29 and 30 September and 27 October, and kit releases on 20 and 21 August, 1, 7, 14 and 23 September, 19 and 28 October (20). A public changelog, a Telegram community for the kit and GitHub issues whose replies were not read (10 of 15). python-okx is named as the official SDK and the kit is current; the MCP server is not in the official registry (12 of 15). The kit runs CI on push and pull request across Node 18, 20 and 26 with unit tests and coverage (9 of 10). 30 + 20 + 10 + 12 + 9 = 81.)