# Why won’t an Ethereum app connect to my wallet? A dapp connection failure may mean the user rejected a request, the app lacks account permission, the requested method is unsupported or the provider cannot serve the chain. These are distinct from an onchain transaction reverting. Check the selected wallet, requested account and network, then inspect the precise error before changing settings or resubmitting transactions. Evidence: [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193); [Ethereum JSON-RPC API](https://ethereum.org/en/developers/docs/apis/json-rpc/) Canonical: https://degreesofsatoshi.com/encyclopedia/ethereum-dapp-connection-errors/ Published: 2026-10-02 Substantively modified: 2026-10-02 Independently verified by an automated reviewer: 2026-10-02T19:27:58.939Z Data current through: 2026-10-02 AI-assisted research and drafting with a separate automated source-verification pass; no external expert or named human review is implied. ## Key facts - **4001:** EIP-1193 defines this error for a user-rejected request. ([Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193)) - **4100:** This error indicates the requested method or account is unauthorized. ([Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193)) - **4901:** The provider is disconnected from the requested chain while connected to another. ([Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193)) ## Connectivity does not equal account permission EIP-1193 uses connected to mean the provider can service RPC requests to a chain. An application can still lack permission to use an account. Conversely, a remembered account selection does not guarantee that the current endpoint can reach the requested chain. Look for an account-authorization prompt and check the application’s requested network. Do not interpret every connection failure as a damaged wallet. Evidence: [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193) ## A wrong-chain request has a narrower fix Suppose a wallet can serve Ethereum mainnet but the app requests an unavailable chain. Error 4901 identifies that chain-specific problem. Re-entering a recovery phrase would not make the endpoint support that chain. A rejected prompt is different: error 4001 can mean you pressed Reject. Retrying is appropriate only if you now understand and intend the request. Evidence: [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193) ## Determine whether anything reached the chain A provider error alone is not proof of a failed included transaction. If a transaction was submitted, follow its hash on the correct network and inspect the receipt before sending a replacement payment. Applications should react to account and chain changes rather than retain a stale selection. For users, refreshing or reconnecting through the documented interface can resolve stale state without deleting recovery material. Evidence: [Ethereum JSON-RPC API](https://ethereum.org/en/developers/docs/apis/json-rpc/); [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193) ## Questions ### Does every connection error cost gas? No. A rejected or unavailable provider request can occur before any transaction is submitted. A gas charge concerns executed onchain work. Evidence: [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193); [Ethereum gas and fees](https://ethereum.org/en/developers/docs/gas/) ### Should support need my recovery phrase to fix a connection? No. Public account, network and error details are sufficient for ordinary connection diagnosis. Sharing recovery secrets creates a separate account-control risk. Evidence: [Ethereum security and scam prevention](https://ethereum.org/en/security/); [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193) ## Claims and scope ### ethereum-dapp-connection-errors-quick-answer A dapp connection failure may mean the user rejected a request, the app lacks account permission, the requested method is unsupported or the provider cannot serve the chain. These are distinct from an onchain transaction reverting. Check the selected wallet, requested account and network, then inspect the precise error before changing settings or resubmitting transactions. Scope: {"collection":"ethereum","dataAsOf":"2026-10-02","blockHeight":null} ### ethereum-dapp-connection-errors-fact-4001 4001: EIP-1193 defines this error for a user-rejected request. Scope: {"collection":"ethereum","dataAsOf":"2026-10-02","blockHeight":null} ### ethereum-dapp-connection-errors-fact-4100 4100: This error indicates the requested method or account is unauthorized. Scope: {"collection":"ethereum","dataAsOf":"2026-10-02","blockHeight":null} ### ethereum-dapp-connection-errors-fact-4901 4901: The provider is disconnected from the requested chain while connected to another. Scope: {"collection":"ethereum","dataAsOf":"2026-10-02","blockHeight":null} ## Sources - [Ethereum Provider JavaScript API](https://eips.ethereum.org/EIPS/eip-1193) — Ethereum Improvement Proposals. Wallet connection and authorization error categories do not prove an onchain transaction occurred. Locator: Provider errors; connectivity; request. Retrieved: 2026-10-02T18:55:24.986Z. - [Ethereum JSON-RPC API](https://ethereum.org/en/developers/docs/apis/json-rpc/) — ethereum.org contributors. RPC requests explicitly identify addresses and block scope; receipts and removed log fields support verification examples. Locator: eth_getBalance; eth_getTransactionReceipt; block parameter; logs. Retrieved: 2026-10-02T18:55:24.990Z. - [Ethereum gas and fees](https://ethereum.org/en/developers/docs/gas/) — ethereum.org contributors. Gas budgeting, actual use, burnt base fee and proposer priority fees. Locator: Gas limit; fee calculation; base fee; priority fee. Retrieved: 2026-10-02T18:55:24.873Z. - [Ethereum security and scam prevention](https://ethereum.org/en/security/) — ethereum.org contributors. Primary community guidance on wallet secrets, phishing, malicious sites and transaction checking. Locator: Wallet security; common scams; hardware wallets. Retrieved: 2026-10-02T18:55:24.140Z. ## Revision history - 2026-10-02: First publication after primary-source research and separate automated verification. ## Cite this entry Degrees of Satoshi editorial project. “Why won’t an Ethereum app connect to my wallet?.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/ethereum-dapp-connection-errors/