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An Apex callout enables you to tightly integrate your Apex with an external
service by making a call to an external Web service or sending a HTTP request
from an Apex script and then receiving the response. Apex provides integration
with Web services that utilize SOAP and WSDL, or HTTP services (RESTful
- Adding Remote Site Settings
- SOAP Services: Defining a Class from a WSDL Document
- Invoking HTTP Callouts
- Using Certificates
- CA-Signed Certificate
- Create Self-Signed Certificate
The following limits apply when an Apex script makes a callout to an HTTP request or a Web services call. The Web services call
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can be a Web services API call or any external Web services call.
• A single Apex transaction can make a maximum of 10 callouts to an HTTP request or an API call.
• The default timeout is 10 seconds. A custom timeout can be defined for each callout. The minimum is 1 millisecond and the maximum is 60 seconds. See the following examples for how to set custom timeouts for Web services or HTTP callouts.
• The maximum cumulative timeout
for callouts by a single Apex transaction is 120 seconds. This time is additive across all callouts invoked by the Apex transaction?
docSample.DocSamplePort stub = new docSample.DocSamplePort();
stub.timeout_x = 2000; // timeout in