CODE_NODE_NETWORK_CALL

CODE_NODE_NETWORK_CALL

Error message

${namePrefix}Code node uses requests/urllib/httpx or another HTTP library. Code nodes have no network access at runtime — make the HTTP/API call with an HTTP Request node and process its output in this node instead.

What it means

CODE_NODE_NETWORK_CALL (python) is a lint issue. lintPythonCode() uses two regexes to match real import/from lines for requests, urllib (and submodules), httpx, aiohttp, http.client, or 'from http import client'. Code nodes have no network access, so the fix is an HTTP Request node.

Solutions

Replace the HTTP call with an HTTP Request node, then process that node's output in the Python Code node.
Remove the requests/urllib/httpx/aiohttp import entirely.
Use $input in the Python Code node to consume upstream HTTP Request node output.

Example fix

# before (Code node pythonCode)
import requests
r = requests.get('https://api.example.com/users')
return [{'json': u} for u in r.json()]
# after — HTTP Request node upstream, then in Python Code node:
return [_['json'] for _ in $input.all()]

Defensive patterns

Strategy: validation

Validate before calling

import { lintPythonCode } from '@n8n/workflow-sdk/lint/code-node/python';
const issues = lintPythonCode(pythonCode);
if (issues.some((i) => i.code === 'CODE_NODE_NETWORK_CALL')) {
  throw new Error('pythonCode imports a network library; move it to an HTTP Request node.');
}

Prevention

Never import requests/urllib/httpx/aiohttp/http.client in a Code node.
Use an HTTP Request node upstream and process its output in the Python Code node.
Lint Python Code node bodies in CI.

When it happens

Trigger: import requests, from urllib.request import urlopen, import httpx, import aiohttp, import http.client, or from http import client — anywhere in pythonCode.

Common situations: LLM emits a Python HTTP snippet in a Code node; developer ports a requests-based script; agent confuses Code node Python with a full CPython environment.

Related errors

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/6ce5e2c415d43210. Report an issue: GitHub.

Appendix: source

Thrown at packages/@n8n/workflow-sdk/src/lint/code-node/python.ts:29

	nodeName?: string;
}

/**
 * Lint Python written for a Code node (`pythonCode` parameter).
 */
export function lintPythonCode(
	pythonCode: string,
	options: LintPythonCodeOptions = {},
): SourceLintIssue[] {
	if (pythonCode.length === 0) return [];

	const issues: SourceLintIssue[] = [];
	const namePrefix = options.nodeName ? `'${options.nodeName}' ` : '';

	if (PYTHON_NETWORK_IMPORT.test(pythonCode) || PYTHON_NETWORK_FROM_IMPORT.test(pythonCode)) {
		issues.push(
			lintIssue({
				code: 'CODE_NODE_NETWORK_CALL',
				message:
					`${namePrefix}Code node uses requests/urllib/httpx or another HTTP library. ` +
					'Code nodes have no network access at runtime — make the HTTP/API call with an HTTP Request node ' +
					'and process its output in this node instead.',
				lintTarget: 'pythonCode',
				nodeName: options.nodeName,
				parameterPath: 'pythonCode',
			}),
		);
	}

	return issues;
}

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