How to Connect Ankr Paid RPC? OKX Funds and Usage Control

OKX

18 October 2026

Ankr's paid RPC does not directly accept OKX funds. You need to deposit money on the Ankr platform using a credit card or an Ethereum wallet, then convert it into API Credits to pay for request fees. Where OKX can help is this: if you choose to pay with an Ethereum wallet, you can withdraw USDT or ETH from OKX to a self-custody wallet such as MetaMask, then connect it to Ankr to complete the payment. Usage control is handled entirely on Ankr's Billing page. OKX is not involved in that part.

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Where the Paid RPC Connects and How Billing Works

Ankr's paid endpoints use the Premium URL structure: protocol + domain + chain path + your JWT token. A Premium endpoint for the Ethereum mainnet looks like this:

https://rpc.ankr.com/eth/6fe08843fa0966456eaa3fb19d4828b12389e71f48829f50df25e45bc5fd6cc5

The token is placed directly in the last part of the URL path. No extra auth header is needed. The same API key can also be used for the Advanced API, which supports multi-chain data queries. Its endpoint is https://rpc.ankr.com/multichain/.

Billing is calculated in API Credits, and the price is anchored to USD. In the pay-as-you-go model, 0.10 USD equals 1,000,000 API Credits, with a minimum deposit of $10. Different methods consume different amounts of credits:

Method Type	API Credits per Request	Equivalent USD
EVM-compatible chains (HTTPS)	200	$0.00002
Solana	500	$0.00005
Beacon Chains	700	$0.00007
Advanced API	700	$0.00007

This means a normal RPC call on an EVM chain, such as eth_call or eth_getBalance, costs $0.00002 per request. With $10, you can make roughly 500,000 EVM requests.

The Practical Path for Paying with OKX Funds

Ankr supports two payment flows: credit card and Ethereum wallet.

If you sign in to Ankr with Google, only the credit card option is available by default. To enable Ethereum wallet payment, you need to connect a wallet that has on-chain transaction history. Ankr clearly states that accounts without transaction records cannot be used for authentication. This rule blocks newly created wallets that have not had any on-chain interaction yet.

Using OKX funds means taking the Ethereum wallet route. The specific steps are:

Convert assets to ETH or USDT on OKX. If you already have either asset in your OKX account, skip this step.
Withdraw from OKX to a self-custody wallet such as MetaMask or Rabby. Withdraw ETH on the Ethereum mainnet. For USDT, make sure the network you choose, such as ERC-20 or another, is compatible with Ankr's payment flow. Ankr's Ethereum wallet payment relies on on-chain transaction confirmation. When paying with USDT, the exchange rate is calculated based on the ANKR/USD rate at the time of block verification.
Connect the wallet and deposit on the Ankr platform. Log in to the Ankr Web3 API platform, go to the Billing page, choose the payment type and amount, then confirm the transaction.

Pay-as-you-go supports three modes: one-time, recurring monthly, and Deal subscription. Only one-time payments can be made in USD, ANKR, or USDT/USDC. Recurring monthly and Deal subscriptions only accept USD via credit card. In other words, if you want to pay a monthly fee with cryptocurrency, that route is not available.

What You Can See in Usage Control

Ankr's Billing page is the main place to control usage. After depositing, your balance is converted into API Credits, and each request deducts from that balance. Ankr does not offer a public REST API for programmatically checking your balance or setting automatic alerts. Usage monitoring is mainly done through the platform interface.

If you want finer usage control at the code level, Ankr's Agent RPC MCP server provides account management interfaces, including API keys, allowlists, usage, billing reads, and team member management. This interface uses OAuth authentication, not an API key. The RPC API key will be rejected in the management interface.

About rate limits: Ankr's Premium plan offers higher request limits and priority request handling compared with free public endpoints, but the exact requests-per-minute cap is not given as a fixed number in public documentation. If you need exact rate limit figures to plan your application throughput, you need to check the plan details for your account inside the Ankr platform or contact Ankr to confirm.

A Common Pitfall

In October 2026, Ankr corrected a batch of Premium URL formats. The old style of placing the API key under the /http/ path is no longer accepted and will return the -32052 API key is not allowed to access blockchain error. The correct form is to put the key under the /premium-http//YOUR_ANKR_API_KEY/ path. If you copied a URL from an old tutorial or sample code, check whether the path prefix is /premium-http/.

Also, Sui's JSON-RPC interface has been gradually retired after September 30, 2026. Ankr recommends migrating to gRPC or GraphQL. If your project uses Sui, this is not a usage control issue, but the interface itself needs to change.