# Interactive Brokers API error: o10335

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This is the markdown version of https://openbrokerapi.com/errors/ibkr/web-api-reply-o10335, written from the same records as that page.

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

The error, as text you can copy:

```
o10335
```

- Kind: API error code
- HTTP status: 200
- API: [Interactive Brokers](https://openbrokerapi.com/brokers/ibkr)
- Status: verified. Source: [interactivebrokers.com](https://www.interactivebrokers.com/docs/web-api/v1/endpoints/orders/suppressible-message-ids), checked 2026-10-12.

## What does o10335 mean on the Interactive Brokers API?

o10335 is an IBKR Web API order reply message id. Interactive Brokers lists it among the ids that can be suppressed. In the vendor's table this message is described as serving the internal Rapid Entry window. A reply message is a notice to confirm before the order goes to work, not a rejection.

## How do I fix o10335?

Confirm the reply at /iserver/reply/{id} to carry on with the order, or do not confirm it. The vendor's suppression endpoint accepts this message id and then accepts such messages automatically for the rest of the brokerage session.

## More on the Interactive Brokers API

- [All Interactive Brokers API error codes](https://openbrokerapi.com/errors/ibkr)
- [Interactive Brokers API quickstart](https://openbrokerapi.com/brokers/ibkr/quickstart): From credentials to a first call on a demo account, step by step.
- [Interactive Brokers API error codes](https://openbrokerapi.com/errors/ibkr): 511 decoded, each with what it means, and the fix where the source gives one.
- [Interactive Brokers API endpoints](https://openbrokerapi.com/brokers/ibkr/endpoints): 23 documented, each with its method, path, parameters and source.
- [Interactive Brokers API page](https://openbrokerapi.com/brokers/ibkr): The full record: access, authentication, limits and the source for each.
- [Get your Interactive Brokers trade history into a spreadsheet](https://openbrokerapi.com/guides/ibkr-trade-history): Guide
- [IBKR API without TWS: headless IB Gateway options](https://openbrokerapi.com/guides/ibkr-headless-gateway): Guide
- [The three Interactive Brokers REST front doors compared](https://openbrokerapi.com/guides/ibkr-rest-front-doors): Guide
- [Interactive Brokers MCP servers, compared](https://openbrokerapi.com/guides/interactive-brokers-mcp-servers): Guide

## Licence and how to cite

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Cite as: Interactive Brokers API error: o10335. Broker API Hub, https://openbrokerapi.com/errors/ibkr/web-api-reply-o10335, newest check 2026-10-12.

Where you rely on a single figure, cite the source and the checked date printed beside it as well. Where this page and a broker's own documentation differ, the documentation wins.