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api-integration-specialist — Claude Code skill: API integration

A Claude skill that walks the agent through third-party API work: auth, retries, rate limits and webhooks.

Install into Claude Code · claude-code-templates All methods and platforms ↓ 
npx claude-code-templates@latest --skill development/api-integration-specialist
Open on GitHub

What api-integration-specialist does

The skill gives the agent patterns for talking to someone else's API: keep keys in environment variables instead of code, run OAuth 2.0 through the authorization code flow, map the service response onto your own model. Everything is shown in JavaScript — an APIClient class, a fetch wrapper, response transformation.

Failure handling gets its own section. There is an APIError class carrying status and body, a retry helper with exponential backoff, and a client-side rate limiter. Only server errors get retried; client errors are thrown straight away. Webhook signatures are verified with HMAC.

Reach for it when you wire up Stripe, Twilio or SendGrid and would rather not re-derive timeouts and rate-limit handling from scratch. One caveat: the samples are JavaScript, so on another stack the agent has to port the logic itself.

What it helps with

  • build an API client with one error path
  • set up OAuth 2.0 and exchange the code for tokens
  • retry failed requests with growing delays
  • cap how often you hit an external service
  • verify an incoming webhook signature

Example prompts for the agent

  • wire Stripe into this project, read the keys from env vars
  • build a client for this API with retries and 429 handling
  • set up the webhook and verify the signature with HMAC

How to install api-integration-specialist

1claude-code-templates

npx claude-code-templates@latest --skill development/api-integration-specialist

2Skills CLI (Vercel)

npx skills add davila7/claude-code-templates --skill api-integration-specialist -a claude-code

3Manually: put the files in place

~/.claude/skills/api-integration-specialist/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/api-integration-specialist/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about api-integration-specialist

How do I install api-integration-specialist in Claude?

Use the templates CLI: npx claude-code-templates@latest --skill development/api-integration-specialist. Or run npx skills add davila7/claude-code-templates --skill api-integration-specialist -a claude-code.

What does api-integration-specialist do?

It hands the agent ready patterns for third-party APIs: authentication, response transformation, retries, rate limits and webhooks.

What language are the examples in?

JavaScript throughout — client classes, error handling, the rate limiter and webhook signature checks.

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