---
schema_version: "1"
id: 2a63087dd11552878253bd8f8112c1201ebc7299e0a1662c9b5292425ea53b12
title: TMF637 v4 Product Inventory Management API
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/industries-integrations/comms/guides/TMF637/TMF637.md
canonical_url: https://developer.salesforce.com/docs/industries/communications/guide/TMF637.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 6abdace8b2a77a0a25cc18924f06b0bf9f81a2c11f92af0fc045fe1653228537
products:
  - Communications Cloud TM Forum API
  - Industries Integrations
---
# TMF637 v4 Product Inventory Management API

The Product Inventory Management API (TMF637) provides a standardized mechanism to retrieve product inventory information.

TMF637 API manages Product resources, where a Product represents an instance of a Product Offering subscribed to by a party (such as a customer). In the Salesforce context, these products correspond to customer-purchased offerings that are represented as Account Assets.

The Product Inventory Management API is certified by TM Forum.

![Certification](https://developer.salesforce.com/media/APIBadge.GOLDwNewLogo.png '{"class": "image-md"}')

**note:** - For TMF Open API release and specification version, see [Industry API Version](https://developer.salesforce.com/docs/industries/communications/industry_api_version.md).

## Access Methods

For the Spring'26 and Summer'26 releases, TMF637 v4 API can be accessed using either of the following methods.

- **Mule Gateway:** Access API through standard MuleSoft endpoints. For sample URLs, payloads, and parameter descriptions, see [Reference](https://developer.salesforce.com/docs/industries/communications/references/tmf637?meta=Summary) section for details on TMF637 v4 MuleSoft endpoints.
- **Direct Access:** Bypass Mule Gateway using Connect/Apex REST endpoints.
  - See [TMF637 v4 Use Cases](https://developer.salesforce.com/docs/industries/communications/guide/TMF637use-cases.html) section for sample URLs and payloads.
  - See [TMF637 v4 Resource Mappings](https://developer.salesforce.com/docs/industries/communications/guide/tmf637_resource_mapping.html) section for parameter descriptions.

**important:** Starting from the Winter ’27 release, only the Direct Access option will be supported. The MuleSoft gateway option will be deprecated, and customers must update their integrations to use the Connect/Apex REST endpoints for continued access to the inbound APIs.

## Available In

This API is available in the managed package.

## Prerequisites

TMF637 v4 API resources are available as static resources. Import the TMF637 v4 API components to your Salesforce org. See [Import TMFOpenAPI Static Resources](https://developer.salesforce.com/docs/industries/communications/import_datapacks.md).

## Extensibility

For extensibility features, see [Extensibility for TMF637 v4 Product Inventory Management](https://developer.salesforce.com/docs/industries/communications/Extensibility/TMF637_extensibility.md).

## Sample Apex URL (Direct Access Method)

TMF637 API uses the following URL format:
`{https://MyDomainLoginUrl}/services/apexrest/{namespace}/tmforum/productopenapi/v1/product`.

## Use TMF637 v4 API

To access and use the TMF637 v4 API:

1. Authorize and use a connected app and an OAuth 2.0 authorization flow. See [Authorize Access](https://developer.salesforce.com/docs/industries/communications/authorization.md).
2. Trigger the API call. Refer the above section for sample URL.
3. Use the TMF637 v4 API available resources and API endpoints.
   - See [TMF637 v4 Use Cases](https://developer.salesforce.com/docs/industries/communications/guide/TMF637use-cases.html) section for sample URLs and payloads.
   - See [TMF637 v4 Resource Mappings](https://developer.salesforce.com/docs/industries/communications/guide/tmf637_resource_mapping.html) section for parameter descriptions.
4. Based on the requirements, extend and customize TMF637 v4 API. [Extend the TMF637 API](https://developer.salesforce.com/docs/industries/communications/TMF637/extend_tmf637_apis.md).