coinmkr.com

What It Is

CoinMkr is a cryptocurrency payment gateway and blockchain API platform focused on a non-custodial model. It allows merchants to integrate crypto payments into their websites, with funds sent directly to the merchant’s own wallet. The platform never takes custody of customer funds, which fundamentally improves asset security.

Core Details by Dimension

• Service type: Offers a payment gateway, wallet-as-a-service, and blockchain data monitoring services.
• Supported payment methods: Supports 7 major cryptocurrencies including BTC, ETH, and LTC, as well as 150+ fiat currencies as pricing units, with a built-in real-time exchange rate conversion API.
• Rates and fees: Its main selling point is 0% transaction fees, using a subscription + API Credits consumption model. The free plan includes 500 credits, while paid plans cost $5-$20/month, with 10% off annual billing. API calls consume credits, such as 3 credits for generating an address and 10 credits for a Webhook trigger.
• Settlement cycle: Because of its non-custodial architecture, funds are sent directly to the merchant’s wallet in real time, with no platform-side settlement delay. The actual speed depends on the underlying blockchain network.
• Compliance and licensing: No financial regulatory licenses are disclosed. Its terms of service are governed by the laws of Peru, and compliance transparency is relatively limited.
• Risk control: Uses HMAC signatures to verify Webhook callbacks and prevent forged requests. The non-custodial model also avoids the risks associated with centralized pooled funds.
• API and integration: Provides a RESTful API and PHP code examples, supports Hosted Checkout via redirect or embedded page, and is fairly developer-friendly.

Pricing

Very cost-effective. The key highlight is the 0% transaction fee: merchants only pay a fixed monthly fee based on API request volume, making it suitable for businesses with frequent orders of varying amounts.

Pros and Cons

Pros include zero transaction fees, full control over funds, and simple API integration. Cons include a relatively limited range of supported coins, lack of disclosed compliance licensing, and the possibility that high-frequency Webhook subscriptions may quickly consume credits, increasing hidden costs.

Who It’s For

Best suited for small and medium-sized crypto e-commerce businesses, independent developers, and Web3 projects that need a low-cost way to accept crypto payments.

Access from China

Access from China is unknown. However, given its cryptocurrency payment nature, domestic network access is likely to be restricted, and Chinese merchants may face payment compliance risks when using it. Alternatives such as CoinPayments may be worth considering.