Agent skill

API Error Handling

Implements standardized API error responses with proper status codes, logging, and user-friendly messages.

MITAuto-check passedDevelopment

Install API Error Handling

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .claude/skills/api-error-handling && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .claude/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .agents/skills/api-error-handling && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .agents/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .cursor/skills/api-error-handling && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .cursor/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/secondsky/claude-skills.git --path plugins/api-error-handling/skills/api-error-handling

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .gemini/skills/api-error-handling && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .gemini/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .github/skills/api-error-handling && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .github/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add secondsky/claude-skills --skill api-error-handling -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills api-error-handling --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/api-error-handling/skills/api-error-handling .opencode/skills/api-error-handling && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "api-error-handling" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/api-error-handling/skills/api-error-handling into .opencode/skills/api-error-handling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "api-error-handling", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: api-error-handling
GitHub stars: 227
Used in: 1 other repo
Token cost: ~713 tokens
SKILL.md length: 84 words
Files: 2 (incl. references)
Skills in repo: 169
Repo updated: Sep 28, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Implements standardized API error responses with proper status codes, logging, and user-friendly messages.

Building production APIs
SKILL.md covers Standard Error Response Format, Error Class (Node.js), Circuit Breaker Pattern and Additional Implementations, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Implementing error recovery patterns

What it does

API Error Handling is an agent skill from secondsky/claude-skills. Implements standardized API error responses with proper status codes, logging, and user-friendly messages. Use when building production APIs, implementing error recovery patterns, or integrating error monitoring services.

Its SKILL.md is about 710 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/python-flask.md`).

It sits in Development, covering Error handling. It works with Flask and Python. The repository describes itself as: Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations. The licence is MIT.

When your agent uses it

Building production APIs
Implementing error recovery patterns
Integrating error monitoring services

Example prompts

“Use the api-error-handling skill to implement standardized API error responses with proper status codes, logging, and user-friendly messages”
“/api-error-handling”

Requirements

Python 3
Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit 8837836. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are javascript and json).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

API Error Handling loads about 713 tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 60 tokens; SKILL.md has 84 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~60
When it runs · the whole SKILL.md, loaded when a task matches: ~713
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~2.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 84 words, ~713 tokens.

Download SKILL.mdSave it as .claude/skills/api-error-handling/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: api-error-handling
description: Implements standardized API error responses with proper status codes, logging, and user-friendly messages. Use when building production APIs, implementing error recovery patterns, or integrating error monitoring services.
license: MIT

API Error Handling

Implement robust error handling with standardized responses and proper logging.

Standard Error Response Format

json

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters",
    "status": 400,
    "requestId": "req_abc123",
    "timestamp": "2025-01-15T10:30:00Z",
    "details": [
      { "field": "email", "message": "Invalid email format" }
    ]
  }
}

Error Class (Node.js)

javascript

class ApiError extends Error {
  constructor(code, message, status = 500, details = null) {
    super(message);
    this.code = code;
    this.status = status;
    this.details = details;
  }

  static badRequest(message, details) {
    return new ApiError('BAD_REQUEST', message, 400, details);
  }

  static notFound(resource) {
    return new ApiError('NOT_FOUND', `${resource} not found`, 404);
  }

  static unauthorized() {
    return new ApiError('UNAUTHORIZED', 'Authentication required', 401);
  }
}

// Global error handler
app.use((err, req, res, next) => {
  const status = err.status || 500;
  const response = {
    error: {
      code: err.code || 'INTERNAL_ERROR',
      message: status === 500 ? 'Internal server error' : err.message,
      status,
      requestId: req.id
    }
  };

  if (err.details) response.error.details = err.details;
  if (status >= 500) logger.error(err);

  res.status(status).json(response);
});

Circuit Breaker Pattern

javascript

class CircuitBreaker {
  constructor(threshold = 5, timeout = 30000) {
    this.failures = 0;
    this.threshold = threshold;
    this.timeout = timeout;
    this.state = 'CLOSED';
  }

  async call(fn) {
    if (this.state === 'OPEN') throw new Error('Circuit open');
    try {
      const result = await fn();
      this.failures = 0;
      return result;
    } catch (err) {
      this.failures++;
      if (this.failures >= this.threshold) {
        this.state = 'OPEN';
        setTimeout(() => this.state = 'HALF_OPEN', this.timeout);
      }
      throw err;
    }
  }
}

Additional Implementations

See references/python-flask.md for:

Python Flask error handling with custom exceptions
Circuit breaker with automatic recovery
Retry with exponential backoff
Sentry integration

Best Practices

Use consistent error format across all endpoints
Include request IDs for traceability
Log errors at appropriate severity levels
Never expose stack traces to clients
Distinguish client errors (4xx) from server errors (5xx)
Provide actionable error messages

Files

SKILL.md and 1 other file (references) in plugins/api-error-handling/skills/api-error-handling of secondsky/claude-skills.

SKILL.md
references/python-flask.md

Open the folder on GitHubat commit 8837836

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in secondsky/claude-skills, which our catalogue first saw on October 7, 2026.

majiayu000/claude-skill-registryskills/api/api-error-handling

Compare with similar skills

API Error Handling next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

API Error Handling compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
API Error Handling this skillsecondsky/claude-skills	227	1 repos	~713	Automated safety check: Pass	MIT	9 days ago
Crafting Effective Readmescumbucadev/cinemaempoa	146	5 repos	~669	Automated safety check: Pass	GPL-3.0	1 mo ago
Cross-Language Coding Standardszereight/gitlab-mcp	2k	1 repos	~1.4k	Automated safety check: Pass	MIT	yesterday
Python Devdatabricks-solutions/ai-dev-kit	1.9k	—	~1.6k	Automated safety check: Pass	Custom licence	1 mo ago
Python Patternskurealnum/dotfiles	290	8 repos	~4.1k	Automated safety check: Pass	None	5 mo ago
Python Script Runnercongchuanling-dot/Cohort	199	—	~577	Automated safety check: Notes	MIT	1 mo ago

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Works with

Questions about API Error Handling

What does API Error Handling do?

Implements standardized API error responses with proper status codes, logging, and user-friendly messages. API Error Handling is an agent skill from secondsky/claude-skills. Implements standardized API error responses with proper status codes, logging, and user-friendly messages.

When should I use API Error Handling?

API Error Handling fits situations like: building production APIs; implementing error recovery patterns; integrating error monitoring services.

How do I install API Error Handling in Claude Code?

Run `npx skills add secondsky/claude-skills --skill api-error-handling -a claude-code`. Or copy the skill folder (plugins/api-error-handling/skills/api-error-handling in secondsky/claude-skills) into .claude/skills/api-error-handling in your project. Claude Code loads it when a task matches its description.

How do I install API Error Handling in Codex?

Run `npx skills add secondsky/claude-skills --skill api-error-handling -a codex`. Or copy the skill folder (plugins/api-error-handling/skills/api-error-handling in secondsky/claude-skills) into .agents/skills/api-error-handling in your project. Codex loads it when a task matches its description.

Can I use API Error Handling in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add secondsky/claude-skills --skill api-error-handling -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/api-error-handling, .gemini/skills/api-error-handling, .github/skills/api-error-handling and .opencode/skills/api-error-handling in your project.

What does API Error Handling need to run?

SKILL.md names no scripts, command-line tools or credentials: API Error Handling is instructions for the agent only. Our summary lists: Python 3; Node.js.

Does API Error Handling access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is API Error Handling safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does API Error Handling use?

API Error Handling is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does API Error Handling use?

About 713 tokens (SKILL.md is roughly 2.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.7k tokens, read only when the agent opens those files.

What are the alternatives to API Error Handling?

Skills that share tags, products or a category with API Error Handling: Crafting Effective Readmes (cumbucadev/cinemaempoa, 146 stars), Cross-Language Coding Standards (zereight/gitlab-mcp, 2k stars), Python Dev (databricks-solutions/ai-dev-kit, 1.9k stars) and Python Patterns (kurealnum/dotfiles, 290 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains API Error Handling?

secondsky (a GitHub user) maintains it in secondsky/claude-skills, which has 227 GitHub stars. The repository holds 169 skills in this directory. The repository was last updated on September 28, 2026.

Source: secondsky/claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install API Error Handling

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

API Error Handling

Standard Error Response Format

Error Class (Node.js)

Circuit Breaker Pattern

Additional Implementations

Best Practices

Files

Used in 1 other repository

Compare with similar skills

Similar skills

More from secondsky/claude-skills

Related

Questions about API Error Handling