Language Guide · C# / .NET
Manage AI Prompts in C# / .NET
No SDK required. One HTTP call.
Fetch versioned, variable-interpolated AI prompts from C# using the built-in HttpClient. Works with ASP.NET Core, Blazor, MAUI, Azure Functions, and any .NET application.
Code Example
One function. Any AI provider.
Fetch a versioned, interpolated prompt from PromptForge with a single HTTP call. The returned content string passes directly to your AI SDK — no transformation, no adapter, no extra library.
- 1Fetch a versioned prompt by ID with your variable values.
- 2Receive the fully rendered content string in the response.
- 3Pass it directly to your AI provider SDK as the system prompt.
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text.Json;
using var client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("Bearer", "YOUR_API_KEY");
var url = "https://www.promptforge-app.com/api/v1/prompts/YOUR_PROMPT_ID"
+ "?_version=latest&role=developer&task=review+code";
var json = await client.GetStringAsync(url);
var doc = JsonDocument.Parse(json);
var content = doc.RootElement.GetProperty("content").GetString();
// Pass content to any AI SDK
// var result = await openAiClient.GetChatMessageContentsAsync(
// content, executionSettings, kernel);Why C# / .NET teams choose PromptForge
Designed for developers who want control without complexity.
HttpClient is already in the BCL
No NuGet packages needed. System.Net.Http and System.Text.Json ship with every .NET runtime from 4.5 onward.
Azure-native workflow
Store the API key in Azure Key Vault, inject via IConfiguration, and call PromptForge from your middleware pipeline or background service.
Async all the way down
GetStringAsync() integrates naturally into async controller actions, Blazor event handlers, and hosted service loops without blocking thread pool threads.
Integrate in 4 steps
From zero to fetching your first versioned prompt in under 10 minutes. No framework setup, no SDK installation — just HTTP.
- 1
Create a prompt with variables
Open the dashboard, click New Prompt, and write your system prompt using {{variable}} placeholders for any dynamic values.
- 2
Copy your prompt ID
Your prompt ID appears in the URL bar when editing: /dashboard/prompts/YOUR_PROMPT_ID. The API Usage panel also shows it with pre-filled examples.
- 3
Generate an API key
Go to the API settings page and click Generate Key. Add it to appsettings.json, User Secrets, or Azure Key Vault and read it via IConfiguration.
- 4
Fetch with HttpClient
Set the Authorization header on a shared HttpClient instance, await GetStringAsync(), and parse the JSON with JsonDocument. Pass the content string to Semantic Kernel, Azure OpenAI, or any other SDK.
Teams building AI features in C# / .NET
.NET enterprise teams use PromptForge to give business stakeholders a safe interface for editing AI prompts without touching C# source. Azure DevOps pipelines stay unchanged — the prompt update is a dashboard action, not a code commit.
Start Free TrialStart for free, upgrade anytime
No credit card required to get started. Paid plans include a 14-day free trial.
- 1k API requests/month
- 1 prompt
- Unlimited versions
- Dynamic variables
- Version pinning
- API key management
No charge until your trial ends
- 10k API requests/month
- 5 prompt
- Unlimited versions
- Dynamic variables
- Version pinning
- API key management
No charge until your trial ends
- 100k API requests/month
- 25 prompt
- Unlimited versions
- Dynamic variables
- Version pinning
- API key management
No charge until your trial ends
- 500k API requests/month
- 100 prompt
- Unlimited versions
- Dynamic variables
- Version pinning
- API key management
Questions? Contact us