hello-api

hello-api is a skill for Claude Code from hellowind777/helloagents. It costs 42 tokens per session (442 once invoked), scanned A, original, no licence file.

An API development guide for web interfaces that exchange requests and responses, including REST APIs, GraphQL endpoints, and webhooks.

In plain words
What is it for?
Use it to build, modify, or review REST and GraphQL endpoints, webhooks, middleware, request and response handling, versioning, rate limiting, and pagination.
Why use it?
It helps keep API behavior consistent when handling requests, responses, shared processing, versions, traffic limits, or pages of results.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the helloagents plugin — 25 skills shipped together

Good fit Use it to build, modify, or review REST and GraphQL endpoints, webhooks, middleware, request and response handling, versioning, rate limiting, and pagination.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hellowind777/helloagents/hello-api
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add hellowind777/helloagents --skill hello-api
Clone the repo
git clone --depth 1 https://github.com/hellowind777/helloagents

Made for: Claude Code.

Or install helloagents, the plugin that ships this one along with the rest of its 25 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for hello-api

README.md
[![agentmods](https://agentmods.dev/badge/skills/hellowind777/helloagents/hello-api/github.svg)](https://agentmods.dev/skills/hellowind777/helloagents/hello-api)
Your own site
<a href="https://agentmods.dev/skills/hellowind777/helloagents/hello-api"><img src="https://agentmods.dev/badge/skills/hellowind777/helloagents/hello-api/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for hello-api

Your own site · 80×15
<a href="https://agentmods.dev/skills/hellowind777/helloagents/hello-api"><img src="https://agentmods.dev/badge/skills/hellowind777/helloagents/hello-api.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 442 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.00442
Opus 5.5 $0.00017 $0.00177
Sonnet 5.5 $0.00008 $0.00088
Haiku 4.5 $0.00004 $0.00044

Measured 1mo ago against content hash 28fa6a10d6b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

hello-api scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/hello-api/SKILL.md · 41 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 41 lines · 42 tokens per session scan A 28fa6a10d6b4

Subscribe to this mod's changes

hello-api is a skill published in the GitHub repository hellowind777/helloagents (706 stars, last pushed 1mo ago), with no licence file. It adds 42 tokens to every session and 442 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other skills, from other repositories

kotlin-ktor-patterns

Ktor server patterns including routing DSL, plugins, authentication, Koin DI, kotlinx.serialization, WebSockets, and testApplication testing. Use when building a Ktor server — routing, plugins, auth, DI, serialization, or tests.

gongyijie85/dsh-ecc · 55 tokens

prisma-patterns

Prisma ORM patterns for TypeScript backends — schema design, query optimization, transactions, pagination, and critical traps like updateMany returning count not records, $transaction timeouts, migrate dev resetting the DB, @updatedAt skipped on bulk writes, and serverless connection exhaustion. Use when writing a…

gongyijie85/dsh-ecc · 82 tokens

mailtrap-email-integration

Guides agents through integrating transactional email sending via Mailtrap's Email API, including sandbox testing, domain verification, and API authentication. Use when implementing email-sending features, debugging delivery issues, or setting up safe dev/staging email testing.

gongyijie85/dsh-ecc · 54 tokens

dotnet-patterns

Idiomatic C# and .NET patterns, conventions, dependency injection, async/await, and best practices for building robust, maintainable .NET applications. Use when writing or reviewing C# / .NET code — DI, async, or general conventions.

gongyijie85/dsh-ecc · 56 tokens

error-handling

Patterns for robust error handling across TypeScript, Python, and Go. Covers typed errors, error boundaries, retries, circuit breakers, and user-facing error messages. Use when designing error types, retries, circuit breakers, or user-facing failure messages in TypeScript, Python, or Go.

gongyijie85/dsh-ecc · 61 tokens

django-patterns

Django architecture patterns, REST API design with DRF, ORM best practices, caching, signals, middleware, and production-grade Django apps. Use when building or reviewing Django apps, DRF APIs, ORM queries, or caching.

gongyijie85/dsh-ecc · 50 tokens