OKLink
Multi-chain block explorer and onchain data platform covering Bitcoin, Ethereum, TRON, Solana and more.
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OKLink key facts
| Category | Block explorer |
|---|---|
| Chains | Bitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon, Arbitrum, Optimism, Aptos, X Layer and others |
| Platforms | Web, API |
| Company | OKLink Fintech Limited, Hong Kong (Explorer services) |
| Chains | Bitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon, Base, Arbitrum, Optimism, Sui, X Layer and others |
| US availability | Not available: section 3.3 of the Terms lists the US and all US territories as restricted territories |
What is OKLink?
OKLink is a multi-chain block explorer and Web3 data platform. Its explorer list includes Bitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon, Base, Arbitrum, Sui and X Layer. The explorer is operated by OKLink Fintech Limited, a Hong Kong company, and adds a CEX assets dashboard and a gas tracker.
How OKLink works
OKLink exposes its explorer data through a v5 REST API under /api/v5/explorer, where each request names a chain by chainShortName, such as ETH.
Contract verification works by upload: you submit source code, OKLink compiles it and matches the bytecode against the chain, and the contract page then shows the code. The docs put average processing at 30 to 60 seconds and support single-file Solidity, standard JSON input and Vyper, with up to 10 linked libraries.
Developer tools in the same API cover address and token approval lookups, domain risk detection, transaction broadcasting and proxy contract verification, with separate endpoints to check a verification result by GUID. For Hardhat there is the @okxweb3/hardhat-explorer-verify plugin, and Foundry users point forge verify-contract at the OKLink verify URL with an OKLink API key.
How to start with OKLink
- Read OKLink's Terms of Service first.
- Section 3.3 says OKLink may restrict or prohibit use from certain regions, which at this time include the United States of America and all US territories, such as Puerto Rico, American Samoa, Guam, the Northern Mariana Islands and the US Virgin Islands, alongside Mainland China, Cuba, Iran, North Korea, Syria, Bangladesh and Bolivia, and tells anyone who does not meet the eligibility rules not to use the service.
- Developers outside those regions apply for an API key through the quickstart section of the OKLink API docs.
Risks to know before using OKLink
- The terms, last updated June 7, 2023, name Hong Kong companies as the contracting parties, including OKLink Trust Limited, a registered trust company under license TC007017, all indirect subsidiaries of OKG Technology Holdings, listed in Hong Kong under stock code 1499.
- Because the terms tell anyone who does not meet the eligibility rules, including the restricted-territory list, not to use the service, the site and API are not offered to US residents.
- OKLink's docs show per-query consumption for each endpoint, but the pages we read do not publish plan prices or rate limits.
- That means you cannot estimate API costs, or compare them with Etherscan's published tiers, until you register and apply for a key.
OKLink alternatives
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Where OKLink ranks on DappAtlas
OKLink pros and cons
- Dozens of chains, UTXO and EVM, in one explorer
- CEX asset and fund flow dashboard
- Contract verification plugins for Hardhat, Foundry and Truffle
- Terms list the United States as a restricted territory
- API rate limits and prices are not published in the docs
- Links out heavily to OKX products
- Some listed testnets are sunset
OKLink FAQ
What is OKLink?
OKLink is a multi-chain block explorer and Web3 data platform. Its explorer list includes Bitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon, Base, Arbitrum, Sui and X Layer. The explorer is operated by OKLink Fintech Limited, a Hong Kong company, and adds a CEX assets dashboard and a gas tracker.
Which chains does OKLink support?
Bitcoin, Ethereum, TRON, Solana, BNB Chain, Polygon, Arbitrum, Optimism, Aptos, X Layer and others.
Is OKLink available in the US?
Not available: section 3.3 of the Terms lists the US and all US territories as restricted territories, according to OKLink’s own page (checked Sep 26, 2026).
Sources
How this page works
Sources: OKLink: official site, OKLink: Terms of Services, OKLink: Homepage. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.