> ## Documentation Index
> Fetch the complete documentation index at: https://docs.i-pay.money/llms.txt
> Use this file to discover all available pages before exploring further.

# Downloads

> Get the OpenAPI contract and the Postman collection.

These two resources describe the same contract as the API reference in a structured form, so you can use them as tooling for your integration rather than reading them. Parameters, responses, statuses and errors are still defined and explained in the reference pages: [Transactions](https://docs.i-pay.money/en/api-reference/transactions/create-a-payment.md), [Payment by link](https://docs.i-pay.money/en/api-reference/payment-by-link/create-a-payment-link.md) and [Errors](https://docs.i-pay.money/en/api-reference/errors.md).

## OpenAPI contract

[Download the OpenAPI specification](https://docs.i-pay.money/en/openapi.yaml)

OpenAPI 3.1 file covering the 5 merchant operations (payments and payment links), their headers, parameters, responses and errors. Use it to:

* import the contract into an HTTP client (Insomnia, Bruno, an editor plugin);
* generate a client or types in your language from the schema;
* automatically validate your requests/responses in your integration tests.

## Postman collection

[Download the Postman collection](https://docs.i-pay.money/ipaymoney-postman-collection.json)

A collection ready to import into Postman, with one example request per operation. Use it to explore the API and make your first calls without writing code, before moving on to a server-side integration. The descriptions in this collection are currently in French. The values to substitute for a first call in Sandbox (test numbers, minimum amount) are in the [Sandbox and testing](https://docs.i-pay.money/en/guides/sandbox-and-testing.md) guide.


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