sending emails
Free
Expert integration of Mailtrap Email API and SMTP for transactional and bulk email delivery at scale.
3
2
API Development Skills for Codex CLI
Skills for REST APIs, GraphQL endpoints, authentication flows, and API integrations. Design, document, and ship robust APIs faster.
119 live api development skills for Codex CLI.
stripe billing scaffold
by Kaymue
Free
Production Stripe billing in one shot. Subscriptions, metered usage, webhooks, customer portal, tax, fraud. 12 patterns, TS+Python.
2
2
stripe subscription engine
by Pankaj Kumar
Free
Complete Next.js & Stripe billing engine with per-seat proration, secure webhooks, and multi-tenant member management.
1
2
api designer
by Roy Yuen
$5
Professional API design and review skill for REST, GraphQL, and event-driven architectures.
5
0
API Contract Guardian for AI Coding Agents
by Shandra
$9.99
Protects API endpoints from accidental breaking changes by generating contract maps, validation rules, integration tests, documentation, and safe AI coding prompts.
2
0
api designer pro
by Julian
$12
Expert API architect to design, review, and audit REST, GraphQL, and event-driven API specifications.
2
0
Webhook Dispatcher — Forward Webhooks as Telegram Alerts
$12
Receive webhooks and forward them as clean Telegram alerts. One-command setup. Dedup, batching, health checks.
2
0
discord bot
by Roy Yuen
$5
Architect, build, and review production-grade Discord bots with structured guidance on commands, security, and scaling.
2
0
tung shing almanac
by yonland wu
Free
Integrate authentic Chinese Tung Shing almanac data and date selection via JPL-grade astronomical calculations.
1
0
api security risk audit fix planner
by nowrich
$5
Audits API designs for OWASP Top 10 risks with severity scoring and concrete remediation checklists.
1
0
API Architect — Free Starter
by GarphenGate
Free
A 12-point rigorous audit for API endpoints to catch permanent design mistakes before they ship.
1
0
Hyperliquid Market Scout
by Edric Vale
$5
Use to pull Hyperliquid exchange data: live prices, order books, account positions, funding rates and trade history. REST and WebSocket flows with formatted sum
1
0
Issue Tracker Linear
by Edric Vale
Free
Use to manage Linear issues over GraphQL with curl: create, update, delete issues, work with projects, teams, cycles, comments, labels, run queries and set webh
1
0
API Rate Limiter Designer
$8.99
Produces a rate-limiting design — algorithm choice, limit keys, tier structure, 429/header design, and monitoring — for an API. Use when the user says "design rate limiting", "set up throttling", "pick token bucket vs sliding window", "design per-tenant quotas", or "handle API abuse". Do not use when the user wants general API contract design rather than the limiting layer specifically.
1
0
web3 graphql
by Zhuoxin Sun
Free
Query Web3 and on-chain GraphQL endpoints using natural language via the Model Context Protocol.
2
15
apiosk
Free
A pay-per-call gateway for AI agents to discover, preflight, and execute paid API requests with unified settlement.
2
55.0(1)
Stripe Subscription Engine
Free
Scaffold a complete, production-ready Stripe subscription system — Checkout, customer portal, hardened webhooks, plans, seats, proration, and dunning — wired to your database.
1
4
igdb api
$9
Professional IGDB v4 API specialist for advanced game data fetching, Apicalypse queries, and image URL construction.
2
2
Trello Board Manager
by Edric Vale
Free
Operate Trello boards through the REST API with one key and token: create and move cards, apply labels, assign members, set due dates, comment, attach files, an
1
25.0(1)
Python Development Engine
by Joker
Free
Python project routing for Web API/crawler/automation/data/CLI. FastAPI/Django/Flask selection, async patterns, deployment strategies.
1
2
nex webhook handler pattern
by Nex AI
Free
Generate production-grade, idempotent FastAPI webhook handlers with signature verification and audit logging.
6
1
using email templates
Free
Expert integration for Mailtrap email templates, Handlebars data mapping, and responsive HTML generation.
3
1
authorizing api requests
Free
Secure authentication and account resolution for Mailtrap Email Sending, Sandbox, and Account APIs.
3
1
health tracker
by Jose Luis
Free
Track health metrics and automate exercise reminders via the health_tracker MCP tool.
2
15.0(1)
Why api development skills work in Codex CLI
Each skill on this page is a SKILL.md file built for api development work and confirmed to run in Codex CLI. Install one into ~/.codex/skills/, start a new session, and Codex CLI follows the workflow the creator encoded instead of improvising from a short prompt.
Listings are ranked by installs, upvotes and reviews, so what surfaces first is what other Codex CLI users actually keep. Free and paid skills compete on the same page, and every listing shows its security scan result before you download anything.