eth_syncing

eth_syncing JSON-RPC reference for MegaETH.

Summary

Returns whether the node is currently syncing.

The public MegaETH endpoint supports this method. The standard, node, and gateway layers below identify behavior that differs from a generic Ethereum endpoint.

Parameters

None.

Result

false when the node is fully synced. When syncing, a SyncProgress object:

• startingBlock Quantity

  Sync start point.
• currentBlock Quantity

  Current progress.
• highestBlock Quantity

  Target block.

Comparison with Ethereum Standard JSON-RPC

Ethereum Standard

The canonical Ethereum method uses the parameter and result contract documented above, including the stated null, false, or zero-value semantics where applicable.

MegaETH Node Behavior

The node returns false when caught up and a progress object while synchronizing. This reports node synchronization, not L1 finality.

MegaETH Public Gateway

The gateway forwards this dynamic status without response caching in the simple read tier.

Errors

The | Scope | column distinguishes method failures from gateway policy errors.

No method-specific errors were observed.

Code	Scope	Message	When it happens
-32005	Transport/policy	Rate limit exceeded	The caller exceeds the public gateway's simple read budget.
-32099	Transport/policy	Payload too large	The request body exceeds the 128 KiB public endpoint limit.

See also Error Codes.

Examples

Endpoint: https://mainnet.megaeth.com/rpc

Capture date: July 24, 2026

Outcome: success

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_syncing",
  "params": []
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": false
}

Sources

• Spec: [email protected]:ethereum/execution-apis.git @ d24f58b56dcd16ab0f0c70ec609bcc1c42750b51: src/eth/client.yaml
• Code: [email protected]:megaeth-labs/mega-reth.git @ ab60376631228edab3a6df180f295280bad26e93: crates/rpc/rpc/src/eth/core.rs
• Code: [email protected]:megaeth-labs/mega-rpc.git @ 06aa35aa95d569c227cc25d2aa12834eb0458aa0: workers/src/spec/methods.ts
• Probe: MegaETH Mainnet public endpoint, July 24, 2026