Crypto Gloss

Etherscan

Etherscan is a blockchain explorer and data service for inspecting public Ethereum transactions, addresses, tokens and smart contracts. It presents indexed blockchain data alongside labels and other supplementary information; it is not a wallet or a guarantee that a listed asset is safe.

What you can check

  • Transactions: search a transaction hash to inspect status, block inclusion, sender, recipient, fees and decoded activity where available.
  • Addresses: review balances, transfers and contract interactions without obtaining control of the address.
  • Contracts: inspect published source code and read available functions; carefully review any write operation before signing.

A blockchain explorer is useful when a wallet says a transfer was sent but a recipient has not credited it. Check the correct network, transaction status, destination and asset contract. A successful blockchain transaction does not establish that an exchange has completed its own deposit checks.

Verified source code is not a security audit

Verification helps relate submitted source code and compilation settings to deployed bytecode. It does not prove that a smart contract is free of vulnerabilities, fairly governed or economically sound. Proxy contracts can introduce an additional implementation and upgrade authority that must also be inspected.

Reading public information usually does not require a wallet connection. Sending a write transaction does: a signature may change permissions or move assets, and successful execution can incur gas costs. A familiar name or explorer label is not a substitute for checking the exact contract address.

Token approvals

An ERC-20 approval can let a spender transfer tokens within an allowance. Etherscan’s approval tools help inspect supported permissions and prepare revocations, but should not be treated as a complete inventory of every possible authorization on every chain. Revoking an allowance is a separate transaction; disconnecting a website alone does not cancel it.

API access and limits

Etherscan’s API supports multiple EVM chains through a shared account/key system and a chain identifier. Coverage varies by endpoint, network and plan. On the October 2026 review date, the rate-limit documentation listed the free tier at three calls per second and 100,000 calls per day on selected chains, without PRO endpoints. Higher tiers have different allowances; check the documentation before building an integration rather than relying on an old five-calls-per-second assumption.

Limitations

Address ownership labels are interpretations, and decoded activity can be incomplete. A displayed token balance or airdrop does not establish liquidity or legitimacy. Confirm consequential findings against another data source or a node when appropriate, especially when the explorer and a wallet disagree.

Social Media Sentiment

A May 2026 r/ethdev discussion of announced API changes shows frustration about limits and paid access, alongside discussion of adapting integrations. The quoted email and commenters’ interpretations are not authoritative plan documentation. This developer-thread sample does not establish overall user satisfaction; the current published limits above come from Etherscan itself.

Last updated: 2026-10

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