OKLink

OKLink is a block explorer that covers many chains, Solana among them. It is run by OKG Technology Holdings, a firm listed in Hong Kong (01499.HK). It is not the older OKLink payments network tied to OKCoin, which still shows up in searches for the name.

With OKLink you can look up blocks, wallets, payments and tokens on Solana, Bitcoin, Ethereum and many other chains, all from one site. OKLink says it covers more than 170 chains. It also says it has tagged over 3 billion wallet addresses with labels, per its About page. The explorer is free. OKLink makes money from two paid tools: Onchain AML, which checks wallets and transfers for risk, and Chaintelligence, which helps trace stolen funds.

How the OKLink explorer works

OKLink reads data from each chain it supports and puts it in one database. The explorer is the free website on top of that database. Search for an address, a transaction hash or a token, and it shows the on-chain record with OKLink's labels added.

Those labels are the core of the business. A label tags an address as belonging to an exchange, a known protocol, a hacker or a large holder. That turns a raw string of characters into something a person can read. The same labels feed the paid compliance products, which score wallets by how close they sit to risky addresses.

OKG says it was founded in 2013 and has owned OKLink since 2018. The site links heavily into OKX xBTC$81,477.53-0.8%'s exchange and wallet. Its developer plugins are published under the @okxweb3 package name, so the two brands are closely tied.

OKLink Solana explorer: what it shows

OKLink's Solana explorer shows Solana blocks, wallets, payments, tokens and network stats. Its page also lists private labels, wallet alerts and checks on token approvals. Helius adds that it has boards for top Solana tokens and NFTs, in more than 12 languages.

The main reason to use OKLink for Solana is reach. Say you follow the same funds across Solana, Ethereum and Tron. One site with one set of labels is quicker than three explorers. For deep Solana work, such as reading a failed swap step by step, Solana's own explorers tend to show more.

OKLink API and API key: what still works

The full OKLink Explorer API has closed. Moralis says OKLink shut it on 20 May 2025, and told apps that used it to switch to a new provider. That API was the paid feed of block, payment, wallet and token data for apps.

The current developer docs now focus on one main job: checking smart contract code. You can verify normal and proxy contracts, and fetch a verified contract's code. Plugins work with Hardhat, Foundry and Truffle. OKLink says a check takes 30 to 60 seconds on average, and the docs show no fee per call.

These tools only work on EVM chains, such as Ethereum, BNB Chain, Polygon, Arbitrum, Base and X Layer. Solana is not on the list. You cannot verify a Solana program through OKLink.

If you want an OKLink API key to pull Solana data, that service is gone. Use a Solana data provider instead (see the options below).

OKLink Onchain AML: KYT and KYA checks

OKG launched Onchain AML in September 2023. It is sold to crypto firms, banks, DeFi teams and police. At launch it covered more than 100 chains. It has two main tools:

• KYT (Know Your Transaction) checks deposits and withdrawals. It links wallets to real firms, flags known bad wallets and sends alerts.
• KYA (Know Your Address) rates a single wallet by the kinds of risk it carries. Firms use it before they deal with that wallet.

An unofficial JavaScript kit for these tools also covers a token risk scanner. Onchain AML is for firms. OKLink does not offer a free "AML check" page for the public. Its old Onchain AML page returned an error when we checked in October 2026, so ask OKLink about access.

Chaintelligence for crypto investigations

Chaintelligence is OKLink's tool for police and regulators. It uses the same labels as Onchain AML. But it is built to follow stolen funds across many wallets and chains, not to check one transfer. OKG's 2023 launch notice lists it next to the explorer and Onchain AML.

Who OKLink is for

OKLink is best for people who track the same wallets on many chains. One set of labels saves time. Its lists of big transfers and exchange funds help you watch whales. The paying users are compliance teams at exchanges and payment firms.

It is a poor fit for two groups. Solana builders can't verify code on it, and its data API has closed. If you just want to check one Solana payment, a Solana-only explorer is quicker and clearer.

Is OKLink safe and reliable?

OKLink is a read-only website, so using the explorer puts no funds at risk. You never connect a wallet to look up an address. The risks are about trust in the data, not custody:

• Labels are OKLink's opinion. Address tags and risk scores are its own judgments and can be wrong or out of date. Treat a "hacker" or "high-risk" tag as a lead to check, not a verdict.
• Products can be withdrawn. The Explorer API shutdown shows that OKLink can close a service that apps depend on. Do not build anything critical on a single OKLink endpoint.
• Close ties to OKX. The site promotes OKX's exchange and wallet while also running a dashboard of exchange holdings. Cross-check exchange reserve data with another source.
• Closed models. The labels and risk models are not open source, so you cannot inspect how a score was reached.

OKLink runs no Solana programs, so there is no upgrade key or smart contract audit to check. OKG still loses money. It said its 2025 loss would be no more than HK$20 million, down from HK$40.3 million a year earlier, per its profit alert.

OKLink alternatives for Solana

For Solana, the main options are Solscan, SolanaFM, the official Solana Explorer and Orb from Helius. All four are built for Solana and show more detail. In September 2026 the official one added a way for AI agents to read chain data. OKLink's edge is that one site and one set of labels cover many chains.

On other chains, people weigh OKLink against Etherscan, BscScan, Tronscan and Blockchair. If you used its data API, Moralis has a guide to move over. For AML, OKLink competes with other risk firms. Check which chains they cover, how good their labels are and what they cost.