---
title: HttpClientHelper
summary: API reference for HttpClientHelper.
status: draft
owner: SAIF.Core documentation team
last_reviewed: 2026-09-24
library: SAIF.Data.Guidewire
reference_type: package
---

# HttpClientHelper

Static holder for a single shared constant, the date format string used when formatting `DateTime` values into query string parameters for Guidewire API requests (for example `FinancialDataApiClient.GetPaymentsByIssueDate`).

## Purpose
- Provides a single source of truth for the date string format expected by Guidewire APIs, avoiding duplicated literal format strings across client classes.

## Context
- Namespace: `SAIF.Data.Guidewire.Clients`
- Assembly/package: `SAIF.Data.Guidewire` (packaged in `SAIF.SAIFCode.Core`)

## Public members
| Member | Signature | Purpose |
| --- | --- | --- |
| JSON_DATE_FORMAT | `public const string JSON_DATE_FORMAT = "yyyy-MM-dd"` | The date format string consumers use to render `DateTime` values as Guidewire-compatible query parameters (ISO-style year-month-day) |

## Behavioral notes
- No behavior beyond exposing the constant; the class has no instance state and cannot be instantiated.

## Constraints and usage notes
- Being `static`, this class cannot be subclassed or instantiated; it exists purely to namespace the `JSON_DATE_FORMAT` constant.

## Sources
- `Data/SAIF.Data.Guidewire/Clients/HttpClientHelper.cs`