# KuCoin vs MEXC API

> MEXC scores 56.3 (C) to KuCoin's 53.9 (D) for exchange market data. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/kucoin-vs-mexc
- Markdown: https://www.anchorterminal.com/compare/kucoin-vs-mexc.md (~3,000 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

MEXC API scores 56.3 (C) on agent readiness against KuCoin's 53.9 (D), and leads in 5 of 7 scored categories. Both do exchange market data.

- 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
- MEXC API: grade C, 56.3/100, rank #791 of 1349. Markdown https://www.anchorterminal.com/tools/mexc.md · JSON https://www.anchorterminal.com/api/v1/tools/mexc.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

### 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.

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

### MEXC API (C)

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:
- Security & auth, 65 against 55

Also in its favour:
- Runs on your own machine

Watch for: No sandbox or testnet; only an order-validation endpoint


## Why the edge

### Security & auth: MEXC API +10

- KuCoin (55): API key with a user-set passphrase, HMAC-SHA256 signing, nine permission groups, IP allow-lists required for Withdrawal and FlexTransfers, trading keys without an IP disabled after 30 days of inactivity, revocation on the management page; no OAuth and no expiry on General keys (24 of 30). A General-only key is a true read-only mode and withdrawals are a separate permission; no confirmation step for writes beyond the key scope (12 of 20). Tools return the exchange's own data (10). The API key info endpoint shows permissions and IP lists; no per-call audit log was found (5 of 15). No security.txt, no disclosure policy or bounty on a page we could read, a whistleblower notice on the legal page (4 of 20). 55.
- MEXC API (65): Granular permissions (account read, trade, withdraw, transfer), per-pair restriction, up to 10 linked IPs, 90-day expiry without an IP, renewal and revocation in the account, 30 keys per account (26 of 30). A read-only MCP mode that hides write tools, a confirmation step before orders and transfers in the CLI and MCP, and --yes that agents are told not to add; nothing server-side confirms an API order (17 of 20). The API returns exchange data, and the CLI security page warns that agents may be led by web pages or files into unwanted actions (12 of 15). CLI confirmations are logged and reported to MEXC with no operator access described; an apiKeyInfo endpoint shows key settings (6 of 15). No security.txt, disclosure policy or bug bounty found; a proof-of-reserves page exists (4 of 20). 26 + 17 + 12 + 6 + 4 = 65.

## Score by category

| Category | Weight | KuCoin | MEXC API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 43 | KuCoin +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 64 | MEXC API +4 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 64 | MEXC API +2 |
| Security & auth | 14% (17.5 this run) | 55 | 65 | MEXC API +10 |
| Payments & pricing | 10% (12.5 this run) | 35 | 31 | KuCoin +4 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 75 | MEXC API +2 |
| Transparency & trust | 7% (8.8 this run) | 54 | 58 | MEXC API +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **53.9 · D** | **56.3 · C** | |

## Facts side by side

| Fact | KuCoin | MEXC API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | KuCoin | MEXC (Comoros) Ltd |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | stdio |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Tools exposed | none | 299 |
| Read-only variant documented | yes | yes |
| llms.txt | no | yes |
| Last release | 2026-11-02 | 2026-10-23 |
| Terms last updated | no date given | 2026-10-13 |
| Privacy policy last updated | no date given | 2026-06-01 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | 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 | 55 stars | 315 stars |

## Verdicts

**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.

**MEXC API.** MEXC publishes granular key permissions, per-pair key limits, weighted rate limits with Retry-After and a dated changelog, and its official CLI runs a read-only-capable MCP server with confirmation before any fund movement. There is no sandbox or status page, API futures orders pay a higher fee schedule, and the user agreement excludes the US, UK, EU members and others.

## Before you call either

### 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

### MEXC API

1. Use a key limited to SPOT_ACCOUNT_READ and SPOT_DEAL_WRITE, the pairs you trade and your IP addresses; keys without a linked IP expire after 90 days
2. Start the MCP server as `mexc mcp spot --read-only` unless the task trades, and never pass `--yes`; orders and transfers wait for the person's confirmation
3. Call POST /api/v3/order/test before a live order, since there is no sandbox
4. On 429 or 418 wait for Retry-After; order placement and cancellation share 12 requests a second per UID, and repeated breaches ban the IP for up to 3 days
5. Treat a 5xx on an order as unknown, not failed, and query the order before retrying; set newClientOrderId so the order can be found

## Questions

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

MEXC API scores 56.3 (C) on agent readiness against KuCoin's 53.9 (D), and leads in 5 of 7 scored categories.

### Do KuCoin and MEXC API need an API key?

Both need an API key.

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

No hosted endpoint is listed for KuCoin. MEXC API runs on your own machine, with no hosted endpoint listed.


## For agents

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

## Other comparisons with KuCoin or MEXC API

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