Idempotency Headers

Pro Feature

This feature is only available on paid plans. Please schedule a demo or email us to get started.

For any idempotent endpoints, Fern’s SDKs will allow you to specify idempotency headers. Typically the headers include Idempotency-Key, but you can also specify additional headers.

1 const response = await client.transactions.send({
2   amount: 100,
3   currency: "usd",
4 }, {
5   idempotencyKey: "64099353-b48b-4dcd-98b7-74df1cc57933"
6 });

Note that the generated SDKs will not allow you to specify idempotency headers for non-idempotent endpoints. This is to ensure that the user knows exactly which invocations are idempotent and which are not.

1	const response = await client.transactions.send({
2	amount: 100,
3	currency: "usd",
4	}, {
5	idempotencyKey: "64099353-b48b-4dcd-98b7-74df1cc57933"
6	});