LangChain integration
LangChain spend limit setup
LangChain workflows can grow expensive when requests loop or context gets large. A spend limit is the cleanest way to stop an experiment from turning into a surprise bill. NexRelay keeps the first test small and reversible.
LangChain spend limitLangChain API keyLangChain prepaid APILangChain gateway
Why this setup works
A dedicated LangChain key keeps testing separate from production while NexRelay adds prepaid balance checks and request logs.
Recommended setup
Set a daily or monthly cap, then keep the key scoped to one app or workflow.
- One key per LangChain workflow
- Start with a small budget
- Keep the model list narrow
- Review the first log entry
What to verify
Check that the key stops cleanly before balance or budget is exceeded.
FAQ
Can spend limits stop requests before routing?
Yes. The gateway can reject a request before upstream cost is created.
Should every tool have its own limit?
For real workflows, yes. Separate limits are easier to audit.