The short answer
A charge from LANGSMITH* OBSERVABILITY corresponds to LLM application tracing, prompt engineering evaluation, or agent debugging from LangChain Inc.
Why it shows up like this
LangSmith, developed by LangChain, provides an observability and evaluation platform for LLM applications, tracing model chains, prompt inputs, latency, and token costs.
The descriptor typically reads LANGSMITH* OBSERVABILITY, LANGCHAIN INC, or LANGSMITH.COM. The Developer tier ($39/user/mo) bills per seat plus usage overages for traces logged beyond the 5,000 monthly free trace limit.
Don’t recognize it? Common scenarios
- A production AI agent or chatbot logged thousands of LLM execution traces to LangSmith.
- An ongoing monthly Developer plan subscription renewed on the credit card.
- Additional team members were invited to collaborate on prompt evaluations and dataset benchmarks.
How to locate the invoice and cancel
- Log in to LangSmith Open smith.langchain.com and sign in with your GitHub or Google account.
- Open Organization Settings review to Settings > Plans & Billing to view trace counts and download Stripe receipts.
- Downgrade to Free Tier Select Change Plan and switch to the Free Personal tier to stop recurring monthly seat charges.
Frequently Asked Questions
What is included in the LangSmith Free tier?
The Personal Free tier includes up to 5,000 captured traces per month, prompt playground access, and 14 days of data retention.
Can I receive a refund from LangSmith?
LangSmith subscriptions are non-refundable. Downgrading takes effect at the conclusion of the active billing period.
Dispute Rights & Fraud Prevention
If you suspect this charge is unauthorized or incorrect, federal regulations protect your payment card.
Review your recent statements carefully and notify your financial institution within 60 days of the statement date.
What should I do if I do not recognize this charge?
First check with household or team members who have permission to use your account. If the transaction was not authorized by anyone on your card, contact your bank or card issuer immediately to report it. Under the Fair Credit Billing Act (FCBA), you have 60 days from the statement date to dispute unauthorized credit card charges.
How long does a billing dispute take to resolve?
Under federal rules, your bank must acknowledge your written inquiry within 30 days and resolve the dispute within two billing cycles (up to 90 days). The bank typically issues a provisional credit while they investigate.
Independent reference — not affiliated with LangChain Inc.. Billing names and policies change; verify with the merchant or your bank before acting.
Verified sources
Every claim on this page is checked against official sources — open them to confirm before you call your bank.
- LangSmith Pricing & Tracing Plans https://www.langchain.com
- CFPB: Disputing Unrecognized Charges https://www.consumerfinance.gov
Reviewed Aug 15, 2026 · high · About UnknownCharges