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title: Troubleshooting SOAP APIs
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# Troubleshooting SOAP APIs

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

Flex Gateway does not natively support SOAP APIs and does not provide any schema validation for XML.
However, you can publish an HTTP API instance to a secure SOAP upstream service.

To create an HTTP API instance to a secure SOAP API upstream service, refer to the following:

- [Publishing Managed Gateway and Connected Mode APIs](https://docs.mulesoft.com/gateway/1.9/flex-gateway-publish-apis-conn)

- [Publishing Local Mode APIs](https://docs.mulesoft.com/gateway/1.9/flex-gateway-publish-apis-local)

## Publish a Soap API

Refer to the following video for additional information about how to publish a SOAP API as an HTTP
API instance:

![](https://play.vidyard.com/egZPDMSw2nMkfXxYPvbWUx.jpg)

## SOAP API Policy Limitations

Flex Gateway policies return JSON error messages when the policy blocks a request. Most SOAP clients
cannot read the JSON messages.

SOAP APIs do not support the following policies:

- [Schema Validation Policy](https://docs.mulesoft.com/gateway/1.9/policies-included-schema-validation)

- [JSON Threat Protection Policy](https://docs.mulesoft.com/gateway/1.9/policies-included-json-threat-protection)

## See Also

- [Known Issues](https://help.salesforce.com/s/issues)