@threadplane/langgraphFunctionv0.3.4

createLangGraphClient

Construct a LangGraph SDK Client that accepts both absolute URLs (http://localhost:2024) and relative /api-style paths that get proxied by middleware in production. The SDK itself rejects relative URLs, so this helper rewrites them against window.location.origin when running in the browser.

Single source of truth for the absolute-URL rewrite — the streaming transport (fetch-stream.transport.ts) and the threads adapter (LangGraphThreadsAdapter) both go through here.

clientOptions.maxRetries maps to the SDK's callerOptions.maxRetries, which governs how many times a failed request (including the initial stream connect) is retried with exponential backoff before the error surfaces. Omitted → the SDK default (currently 4). Apps under test set 0 so a forced connection failure surfaces immediately instead of after the full backoff window.

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import { createLangGraphClient } from '@threadplane/langgraph';

Declaration · overload 1

export declare function createLangGraphClient(apiUrl: string, clientOptions?: LangGraphClientOptions): Client;

Parameters

apiUrl · required: string
clientOptions · optional: LangGraphClientOptions

Returns

Client

Examples

const client = createLangGraphClient(environment.langGraphApiUrl);
const threads = await client.threads.search({ limit: 50 });