# Quicknode Knowledge Base


## Errors & Troubleshooting

- [Handling Websocket Drops and Disconnections](https://support.quicknode.com/articles/2612488528-handling-websocket-drops-and-disconnections)
- [429 Errors Explained](https://support.quicknode.com/articles/2335544672-429-errors-explained)
- [Solana getBlock Performance FAQ](https://support.quicknode.com/articles/3643988900-solana-getblock-performance-faq)
- [Handle "execution timeout" Errors](https://support.quicknode.com/articles/3262753590-handle-execution-timeout-errors)
- [Yellowstone gRPC Geyser Plugin FAQs](https://support.quicknode.com/articles/7564862414-yellowstone-grpc-geyser-plugin-faqs)
- [Error: credits limited to X/sec](https://support.quicknode.com/articles/7146659276-error-credits-limited-to-x-sec)
- [Null Response in Arbitrum debug_traceTransaction Method](https://support.quicknode.com/articles/7336682509-null-response-in-arbitrum-debug-tracetransaction-method)
- [Error : {'code': -32000, 'message': 'filter not found'}](https://support.quicknode.com/articles/3189616412-error-code-32000-message-filter-not-found)
- [Why doesn't my AVAX endpoint work?](https://support.quicknode.com/articles/3618020312-why-doesn-t-my-avax-endpoint-work)
- [XRP Ledger RPC "Operation not supported" Error](https://support.quicknode.com/articles/3129844913-xrp-ledger-rpc-operation-not-supported-error)
- [Node is behind by xxx slots](https://support.quicknode.com/articles/7548108674-node-is-behind-by-xxx-slots)
- [Understanding the 413 "Request Entity Too Large" Error](https://support.quicknode.com/articles/6801664182-understanding-the-413-request-entity-too-large-error)
- [Getting "Connection refused". How can I fix this?](https://support.quicknode.com/articles/4699520073-getting-connection-refused-how-can-i-fix-this)
- [Dealing with getProgramAccounts error "Tokenkeg... excluded from account secondary indexes"](https://support.quicknode.com/articles/3036280821-dealing-with-getprogramaccounts-error-tokenkeg-excluded-from-account-secondary-indexes)
- [Fixing Nonce Issues on Base Network](https://support.quicknode.com/articles/3869524580-managing-nonces-on-base-network-handling-eth-gettransactioncount-inconsistencies)

## Metrics & Insight

- [Block timestamp explained](https://support.quicknode.com/articles/5987767657-block-timestamp-explained)
- [Why are slots/blocks missing on Solana?](https://support.quicknode.com/articles/3817237462-why-are-slots-blocks-missing-on-solana)
- [Understanding my Method Call Breakdown (in "metrics" tab)](https://support.quicknode.com/articles/9223695305-understanding-my-method-call-breakdown-in-metrics-tab)
- [What are chain reorgs and how do I spot them?](https://support.quicknode.com/articles/1484092272-what-are-chain-reorgs-and-how-do-i-spot-them)
- [Understanding the 10,000 Block Range Limit for querying Logs and Events](https://support.quicknode.com/articles/3261121056-understanding-the-10-000-block-range-limit-for-querying-logs-and-events)

## Account & Endpoint

- [How can I secure my endpoint?](https://support.quicknode.com/articles/9038592769-how-can-i-secure-my-endpoint)
- [How do I manage team members on my account?](https://support.quicknode.com/articles/7038344990-how-do-i-manage-team-members-on-my-account)
- [How can I resolve a 401 UNAUTHORIZED error when accessing my endpoint?](https://support.quicknode.com/articles/6868169181-how-can-i-resolve-a-401-unauthorized-error-when-accessing-my-endpoint)
- [How do I reset my account password?](https://support.quicknode.com/articles/2437902161-how-do-i-reset-the-password-on-my-account)
- [How to set Referer Whitelist http header in solana web3, web3js, ethers](https://support.quicknode.com/articles/1138164810-how-to-set-referer-whitelist-http-header-in-solana-web3-web3js-ethers)
- [What should I do if I notice a sudden spike in requests to my endpoint?](https://support.quicknode.com/articles/4479214887-what-should-i-do-if-i-notice-a-sudden-spike-in-requests-to-my-endpoint)

## Billing FAQ

- [1 Month Free Trial ](https://support.quicknode.com/articles/5387074982-1-month-free-trial)
- [Yearly Plans Overview](https://support.quicknode.com/articles/4599759328-yearly-plans-overview)
- [Monthly Usage Limits](https://support.quicknode.com/articles/5364861616-monthly-usage-limits)
- [What are API Credits?](https://support.quicknode.com/articles/9958005300-what-are-api-credits)
- [How are my requests billed?](https://support.quicknode.com/articles/2106994823-how-are-my-requests-billed)
- [Can I pay in cryptocurrency?](https://support.quicknode.com/articles/4344645562-can-i-pay-in-cryptocurrency)
- [How do I Cancel my Subscription?](https://support.quicknode.com/articles/4271041095-how-do-i-cancel-my-subscription)
- [How do I upgrade/downgrade my plan?](https://support.quicknode.com/articles/7429692337-how-do-i-upgrade-downgrade-my-plan)
- [How to modify the credit card on file?](https://support.quicknode.com/articles/8118615916-how-to-modify-the-credit-card-on-file)
- [How to redeem a coupon?](https://support.quicknode.com/articles/9091755978-how-to-redeem-a-coupon)
- [How to restore service after an interruption due to an unpaid invoice?](https://support.quicknode.com/articles/4324569713-how-to-renew-service-after-interruption-due-to-unpaid-invoice)
- [Sales Tax Information](https://support.quicknode.com/articles/6388085677-sales-tax-information)
- [Requesting Tax-Exempt Status](https://support.quicknode.com/articles/9693205502-requesting-tax-exempt-status)
- [How does the billing cycle work?](https://support.quicknode.com/articles/5943692175-how-does-the-billing-cycle-work)
- [Flat Rate RPS - Billing](https://support.quicknode.com/articles/7155954804-flat-rate-rps-billing)

## Network & Infrastructure

- [Where are QuickNode Servers Located?](https://support.quicknode.com/articles/5948433326-where-are-quicknode-servers-located)


- [Why am I seeing high eth_subscribe credits usage on websocket connections?](https://support.quicknode.com/articles/6139923946-why-am-i-seeing-high-eth-subscribe-credits-usage-on-websocket-connections)