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To avoid HTTP and TCP on the local bot-to-node RPC path, run the bots on the same machine as a node that supports IPC, then have each bot use the node’s IPC endpoint. In Ethereum, Geth provides this through a Unix domain socket on Linux and macOS or a named pipe on Windows. This is a local transport, not a way to connect remote bots or remove the node’s own blockchain networking.
How the setup works
JSON-RPC describes how an application requests data or actions from an Ethereum client; it does not require one particular transport. Ethereum.org describes JSON-RPC as transport-agnostic, while each node client determines which transports it implements and exposes (Ethereum.org: JSON-RPC API).
With Geth, the local arrangement is one node process and multiple bot processes on the same host. Each bot sends JSON-RPC requests to the node through its IPC socket or pipe. Geth documents support for JSON-RPC over HTTP, WebSocket, and Unix domain sockets, and says its IPC server is enabled by default and has access to all JSON-RPC namespaces (Geth: JSON-RPC Server). That broad namespace access makes limiting local filesystem access important.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsIPC removes HTTP and TCP from this client-to-node hop. It does not remove the node’s separate peer-to-peer connections to the blockchain network, and it does not guarantee faster trading or transaction propagation. Ethereum.org identifies IPC or a node plugin as a low-latency option for applications processing substantial data or needing to replace transactions quickly (Ethereum.org: Nodes and clients).
Configure multiple bots to use the same local endpoint
- Choose a client and confirm IPC support. This example uses Geth on Ethereum. Other chains and clients may use different transports or configuration. Besu also documents IPC support, but its API settings are client-specific (Besu: Access the Besu API).
- Run the node on the bots’ host. Keep the node process and bots on the same machine if the requirement is to avoid TCP/HTTP for their RPC requests. Geth describes IPC as intended for local environments.
- Enable or retain the IPC endpoint. Geth enables its IPC server by default. Its configuration includes
--ipcpathto set the endpoint path and--ipcdisableto disable IPC. Check the current client documentation and your launch configuration before changing either setting (Geth: JSON-RPC Server). - Point each bot’s JSON-RPC client at that endpoint. Every bot must use a library that supports the node’s IPC transport and the JSON-RPC methods it needs. Support varies by bot library; verify it rather than assuming an HTTP-only client can use a socket or named pipe.
- Restrict access to the endpoint. Treat the socket or pipe as a local capability: grant access only to the intended bot processes and accounts. Because Geth IPC can access all JSON-RPC namespaces, do not make its filesystem permissions broader than necessary.
- Test the integration before relying on it. Confirm that each bot can connect, call the required methods, and—if needed—receive subscriptions. Test multiple clients together in your deployment; the available documentation does not establish concurrency limits or performance for a particular bot stack.
IPC, WebSocket, and HTTP compared
Geth’s transport descriptions are qualitative guidance, not a benchmark of a particular node, machine, or collection of bots. Its documentation characterizes IPC and WebSocket as having low per-message metadata overhead and HTTP as high; it also notes that HTTP can have lower overall overhead when request volume is low because connections close between requests (Geth: JSON-RPC Server).
| Transport | Where it fits | Subscriptions | Geth’s overhead guidance | Meets a strict no-TCP/HTTP goal? |
|---|---|---|---|---|
| IPC | Local bots and node on the same host | Supported | Low per-message metadata overhead | Yes, for the local bot-to-node RPC path |
| WebSocket | Local or remote-capable network access | Supported; bidirectional push | Low per-message overhead after the handshake | No; it is a network transport |
| HTTP | Local or remote-capable network access | Not supported in Geth’s comparison | High per-message metadata overhead; may suit low request volumes | No |
When bots run on other machines
Local IPC is not a remote connection method. If a bot runs on a separate machine, either move it alongside the node or use a network-capable RPC transport such as WebSocket or HTTP. The latter choices do not meet a strict no-TCP requirement, and they should be exposed only with deliberate access controls.
Geth warns that exposed HTTP or WebSocket RPC can create account-control risks in configurations that permit account unlocking. Besu cautions that binding its API to 0.0.0.0 makes it remotely reachable and calls for firewall protection (Geth: JSON-RPC Server; Besu: Access the Besu API). Do not expose an RPC listener broadly just to make local bot connections convenient.
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What IPC does—and does not—remove
- It removes: HTTP framing and TCP from the local bot-to-node RPC connection when both run on the same host using IPC.
- It does not remove: the node’s peer-to-peer network connections, JSON-RPC processing, serialization, operating-system scheduling, or other work that may affect response time.
- It does not prove: a specific latency or throughput improvement for your workload. Geth’s descriptions are qualitative, and the cited documentation provides no measurements for a multiple-bot deployment.
- It depends on: the chosen client, its enabled API namespaces, and whether each bot’s software supports that client’s IPC implementation.
Use subscriptions when bots need pushed events
Geth supports subscriptions over IPC as well as WebSocket. If bots need event notifications, IPC can keep that traffic on the local endpoint. WebSocket is an alternative when network access is required and supports server-pushed events, but it does not satisfy a strict no-TCP condition. Choose based on where the bots run and how they consume events, not on an assumed speed advantage.
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