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Fetch and Send Data · dotnet | DecimalAI

frontendby dotnet

Fetch and Send Data

dotnet/fetch-and-send-data

Source dotnet/skills ↗License MIT

Call APIs, load data into components, and handle the async lifecycle in Blazor. USE FOR fetching data from a backend, submitting data to an API, displaying loading/error states, registering HttpClient, building service abstractions for Auto/WebAssembly render modes. DO NOT USE for form validation (see collect-user-input), prerendering persistence (see support-prerendering), or project scaffolding (see create-blazor-project).

SkillScore86Maintained

Automatic

Frontend / UI pack

Last verified 8/9/2026

What it changes

Passed 19 of 22 test cases with the skill, and 15 of 22 without it.

Without skill68%

With skill86%

Checks it passed that the model alone missed

Data service methods accept a CancellationToken parameter.
The field or property storing fetched data uses the PersistentState attribute.
The component implements IAsyncDisposable to cancel pending token sources upon disposal.

and 5 more in the full report

4 fixed15 passed either way3 still failing0 broke

Pass-rate lift: +18 pp
Tokens: +66%
Agent turns: 0%
Response time: -30%

Model gemini-3.6-flashMeasured 8/9/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dotnet-fetch-and-send-data/SKILL.md https://app.decimal.ai/s/dotnet-fetch-and-send-data/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dotnet-fetch-and-send-data, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dotnet-fetch-and-send-data/ and pins it in .decimal/skills.lock

decimalai skills add dotnet-fetch-and-send-data

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dotnet-fetch-and-send-data/SKILL.md https://app.decimal.ai/s/dotnet-fetch-and-send-data/SKILL.md

Raw file: /s/dotnet-fetch-and-send-data/SKILL.md ↗ · machine-readable summary at /s/dotnet-fetch-and-send-data.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

In a Blazor Server component with interactive server rendering, navigating to the page triggers OnInitializedAsync twice during prerendering, causing duplicate database calls. What pattern should be used inside the component code to prevent re-querying the database during the interactive render phase?

What was checked, without and with the skill
Checked	Without skill	With skill
The field or property storing fetched data uses the PersistentState attribute.	Missed	Passed
The data fetching assignment inside OnInitializedAsync uses the null-coalescing assignment operator ??=.	Missed	Passed

case-05 · gemini-3.6-flash · 8/9/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md299 linessingle file

Fetch and Send Data

Step 1 — Read AGENTS.md

Check Interactivity Mode and Scope:

Mode	Data access
None (Static SSR)	Server-side: inject services/`DbContext`. Use `[StreamRendering]` for loading UX.
Server	Server-side: inject services/`DbContext`. Guard prerender with `??=` + `[PersistentState]`.
WebAssembly	Browser-side: `HttpClient` only. No direct server access.
Auto	Both server and browser. Always go through an API.

Step 2 — Register HttpClient

Only needed when calling external APIs from Server, or always for WebAssembly/Auto. Server components accessing their own database should inject DbContext or a service directly.

// Named client — requires Microsoft.Extensions.Http NuGet
builder.Services.AddHttpClient("CatalogAPI", client =>
{
    client.BaseAddress = new Uri("https://api.example.com/");
});

// Typed client
builder.Services.AddHttpClient<CatalogClient>(client =>
    client.BaseAddress = new Uri("https://api.example.com/"));

For WebAssembly/Auto with prerendering, register in both server and .Client Program.cs.

Step 3 — Fetch Data

Simple load

@page "/products"
@inject CatalogClient Catalog

@if (products is null)

Track record

Benchmark

19 / 22

test cases passed, vs 15 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dotnet / skills

plugins/dotnet-blazor/skills/fetch-and-send-data/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Fetch and Send Data

Step 1 — Read AGENTS.md

Step 2 — Register HttpClient

Step 3 — Fetch Data

Simple load

Track record

Benchmark

Adoption

SkillSafety

Source

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