api-pagination

Implements efficient API pagination using offset, cursor, and keyset strategies for large datasets. Use when building paginated endpoints, implementing infinite scroll, or optimizing database queries for collections.

Quality

82%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

Securityby

Passed

No findings from the security scan

API Pagination

Implement scalable pagination strategies for handling large datasets efficiently.

Pagination Strategies

Strategy	Best For	Performance
Offset/Limit	Small datasets, simple UI	O(n)
Cursor	Infinite scroll, real-time	O(1)
Keyset	Large datasets	O(1)

Offset Pagination

app.get('/products', async (req, res) => {
  const page = parseInt(req.query.page) || 1;
  const limit = Math.min(parseInt(req.query.limit) || 20, 100);
  const offset = (page - 1) * limit;

  const [products, total] = await Promise.all([
    Product.find().skip(offset).limit(limit),
    Product.countDocuments()
  ]);

  res.json({
    data: products,
    pagination: {
      page,
      limit,
      total,
      totalPages: Math.ceil(total / limit)
    }
  });
});

Cursor Pagination

app.get('/posts', async (req, res) => {
  const limit = 20;
  const cursor = req.query.cursor;

  const query = cursor
    ? { _id: { $gt: Buffer.from(cursor, 'base64').toString() } }
    : {};

  const posts = await Post.find(query).limit(limit + 1);
  const hasMore = posts.length > limit;
  if (hasMore) posts.pop();

  res.json({
    data: posts,
    nextCursor: hasMore ? Buffer.from(posts[posts.length - 1]._id).toString('base64') : null
  });
});

Response Format

{
  "data": [...],
  "pagination": {
    "page": 2,
    "limit": 20,
    "total": 150,
    "totalPages": 8
  },
  "links": {
    "first": "/api/products?page=1",
    "prev": "/api/products?page=1",
    "next": "/api/products?page=3",
    "last": "/api/products?page=8"
  }
}

Best Practices

Set reasonable max limits (e.g., 100)
Use cursor pagination for large datasets
Index sorting fields
Avoid COUNT queries when possible
Never allow unlimited page sizes

Repository: secondsky/claude-skills
Path: plugins/api-pagination/skills/api-pagination/SKILL.md
Commit: 84802a4

Last updated: 3 days ago
First committed: 8 months ago

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.