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Adding pagination to SDKs

Customize pagination rules for each API operation using the x-speakeasy-pagination extension.

Adding pagination to an SDK enhances the developer experience by providing a structured way to handle paginated API responses.

The next() function returns nil, nil when there are no more pages to retrieve, indicating the end of pagination rather than an error

Configuring pagination

To configure pagination, add the x-speakeasy-pagination extension to the OpenAPI description.

The x-speakeasy-pagination configuration supports offsetLimit, cursor, and url implementations of pagination.

Offset and limit pagination

For type: offsetLimit pagination, specify at least one of the following inputs: offset or page.

At least one response object must have the following structure:

If inputs.limit is defined in the pagination configuration, next() will return null when $.data.resultArray has a length of less than the inputs.limit value. If inputs.limit is omitted, next() will return null when the length of $.data.resultArray is zero.

When using the page input, output.numPages can be used instead of output.results to determine when the pages for the operation are exhausted.

If output.numPages is provided, next() returns null when the incremented page number is greater than the numPages value.

At least one response object must have the following structure:

For example, in the following inputs.offset configuration, inputs.limit has the same effect as in the inputs.page example.

Cursor-based pagination

For type: cursor pagination, configure the nextCursor output. This pagination type uses a cursor value from the previous response.

The following is an example inputs.cursor configuration.

Because the input above is in the requestBody, this operation must take a request body with at least the following structure:

At least one response object must have the following structure:

The [-1] syntax in outputs.nextCursor indicates the last value in an array using JSONPath negative indexing. Ensure the type of requestBody.since matches the type of outputs.nextCursor.

URL-based pagination

When an API returns a URL for the next page, you can use the url type in x-speakeasy-pagination. Here’s an example configuration:

The x-speakeasy-pagination configuration specifies the type as url and uses a JSONPath expression to extract the nextUrl from the response.

The response object for the URL-based pagination should have the following structure:

Inputs

name

With in: parameters, this is the name of the parameter to use as the input value.

With in: requestBody, this is the name of the request-body property to use as the input value.

in

Indicates whether the input should be passed into the operation as a path or query parameter (in: parameters) or in the request body (in: requestBody). Only simple objects are permitted as values in the request body.

type

Type
page
Description
The variable that will be incremented on calling
.
Description
The variable that will be incremented by the number of results returned by the previous execution. Note: Requires
.
Description
When provided,
returns
(or equivalent) when the number of results returned by the previous execution is less than the value provided.
cursor
Description
The variable that will be populated with the value from
when calling
. Note: Required for
pagination.

Outputs

All the outputs are expected to be strings adhering to the JSONPath  schema.

Key
Description
When provided,
returns
if the
input value exceeds the value found at the provided JSON path. Note: Requires
input.
Description
When provided,
returns
if the array found at the provided JSON path is empty. Note: Required by
input.
Description
Populates
with the value found at the provided JSON path when calling
. Note: Required by
.

If the JSONPath value provided for an output does not match the response returned, next() returns null because pagination cannot be continued.

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