mcp-server

API-mega-list: Fast App Building

Get instant access to a vast API collection for automations and applications, ideal for founders and developers, with 5.7k+ GitHub stars.
intermediate⏱ 30 minutes💵 Free (self-hosted)
7,776 stars+90★ this week1,492 forksJavaScriptGuide quality 9/10 · reviewed Jun 5Updated 10/13/2026100% free · open source
What it is

Access a large collection of pre-existing APIs to speed up your app building process.

Real use case example

"A founder, Sarah, wants to automate the onboarding process for her new customers. She searches the API collection, finds a pre-existing API to connect to Stripe, and uses it to automatically add new customers to her Notion database. She then uses this API to trigger a welcome email through Resend. The API collection does the heavy lifting, freeing up Sarah to focus on the app's core features."

When to use it
  • •When you need to rapidly prototype a product with external data sources
  • •When searching for verified, working APIs across different categories
  • •When wanting to save research time by using a pre-vetted API collection
Ready-to-paste prompt
git clone https://github.com/cporter202/API-mega-list && cd API-mega-list
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/api-mega-list && curl -fsSL https://workflowstacks.com/api/skills/api-mega-list/claude-skill -o ~/.claude/skills/api-mega-list/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How API-mega-list: Fast App Building works
Codeflow
Free to inspect

API-mega-list: Fast App Building is mostly documents (30 doc files, 3 small scripts) — something you read, not something you run. There is nothing to install. Last commit 2 months ago, no license file.

Size
Mostly documents
30 documents · 3 small scripts · days to read — use, don't read
Setup
Nothing to install
A guide / curated list. Just read it and follow the links.
Runs on
Nowhere — you read it
A reading resource, not a program.
JavaScript 100%
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
What's in each folder
settings/Configuration4 files
00-featured-apis/Folder3 files
agents-apis-623/Folder1 files
ai-apis-1555/Folder1 files
business-apis-514/Folder1 files
READMEDocumentedNo licenseUpdated 2 mo ago
Quick Actions
Details
Creator
cporter202
Language
JavaScript
Category
mcp-server
Published
12/9/2025

Are you the creator of this tool? and earn 85% of every sale.

Show it off in your README:

Featured on WorkflowStacks
[![Featured on WorkflowStacks](https://workflowstacks.com/api/badge/api-mega-list.svg)](https://workflowstacks.com/skills/api-mega-list?utm_source=github&utm_medium=badge)
🔥 Hot this week, in your inbox
Skills like this, every Monday.

The five fastest-growing open-source AI skills, ranked by GitHub star growth. One email a week, unsubscribe anytime.

Do this with a working workflow

Pages we wrote and tested that put a skill like this to work — importable n8n templates, outcome guides and Claude Desktop configs.

Ready-to-run pack · one-time $39

Lead Finder

Turn a business type + city into a spreadsheet of real leads.

Includes the tested workflow and a written setup playbook. Needs: Google Places API key (free tier).

See what you get