RPC error -32602: Invalid params

Last updated: October 24, 2026

At a glance

Cause

The method exists but the parameters are wrong: missing required args, wrong order/types, an invalid encoding, or an out-of-range value.

Solution

1. Match the parameter order and types to the method signature.
2. Use the correct encoding (base58/base64/jsonParsed).
3. Validate ranges (slot/limit) before sending.

Example

{
  "id": 1,
  "error": {
    "code": -32602,
    "message": "Invalid params: invalid length"
  },
  "jsonrpc": "2.0"
}