QuickNode now provides Logs for your RPC endpoints. Easily identify and resolve issues by viewing detailed error information directly from your dashboard.

HTTP Error Codes

Let's look at the common HTTP errors you can encounter, what they mean and what you can do to prevent them.

400

Bad Request

Incorrect HTTP request type (e.g. using GET instead of POST) or invalid characters

401

Unauthorized

One or more security requirements not met such as incorrect token auth, IP not in whitelist, invalid JWT, etc

403

Forbidden

Endpoint disabled (one reason could be a past due payment)

403

Forbidden — custom trace not found in allowed custom traces

Custom trace code not whitelisted; submit a ticket to go through the approval process

404

Not Found

Incorrect URL or incorrect method

413

Content Too Large

Body of the request is too large

429

Too Many Requests

The requests per second (RPS) of your requests are higher than your plan allows; see support docs for details

500

Internal Server Error

Submit a ticket for the support team to investigate as soon as possible

503

Service Unavailable

Submit a ticket for the support team to investigate as soon as possible

HTTP Error Code Example

{
  "jsonrpc": "2.0",
  "error": {
    "code": 429,
    "message": "The requests per second (RPS) of your requests are higher than your plan allows."
  },
  "id": 1
}

Solana RPC Error Codes

When working with Solana, understanding its API error codes is essential for effective troubleshooting and smooth application operation.

-32002

Transaction simulation failed / preflight check error

The transaction being sent has errors; double check params, signatures, and message

-32002

Blockhash not found

The blockhash sent is not known by the validator yet; implement a retry mechanism

-32003

Transaction signature verification failure

One or more signatures are invalid; verify private/public keys and signatures

-32004

Block not available for slot

Timeout or block not retrievable; use a retry mechanism

-32005

Node is unhealthy / behind by slots

Node is behind the tip; retry with backoff or try another endpoint

-32007

Slot was skipped or missing due to snapshot jump

Requested block does not exist; verify the slot in a block explorer

-32009

Slot was skipped or missing in long-term storage

The requested slot is missing from long-term storage; see support FAQ for details

-32010

Key excluded from account secondary indexes

Unexpected payload or incorrect data for the method; ensure request body matches validator expectations

-32013

Transaction signature length mismatch

Signature length is not as expected; re-encode or rebuild the transaction

-32014

Block status not yet available

Block is pending or not yet synced; retry later

-32015

Transaction version not supported

Use "maxSupportedTransactionVersion": 0 or upgrade client to support versioned transactions

-32016

Minimum context slot not reached

The required context slot is too far in the future; lower the minimum context slot or retry later

-32602

Invalid params

Flags/params are invalid; double check method parameters against Solana docs

Solana RPC Error Code Example

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid param: Invalid"
  },
  "id": 1
}

Endpoint Logs

QuickNode provides logs for your RPC endpoints to help you diagnose issues and track transaction activity. You can view logs directly in your QuickNode dashboard by navigating to:

1. Endpoints in the sidebar
2. Selecting your endpoint
3. Opening the Logs tab

You can filter logs by time window, response type, method, and network.

What Gets Logged

RPC Errors
All failed requests including invalid methods, malformed parameters, execution errors, and network timeouts.

Transaction Submissions
Send transaction requests and their success or failure status.

Logging Limitations

Only RPC errors and transaction submissions are logged — successful read operations are not captured. To maintain optimal endpoint performance, logging operates on a best-effort basis. Some logs may be dropped during high-traffic periods to preserve low latency.

Retention and Access

Build and Scale plans include dashboard access with standard log retention. Enterprise plans provide extended retention periods and programmatic API access for log retrieval.

If you're experiencing other error codes, please let us know by submitting a ticket. We're more than happy to assist