Api response optimization

Skill ComeOnOliver/skillshub/skills/secondsky/claude-skills/api-response-optimization

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Install

npx -y skills add ComeOnOliver/skillshub --skill api-response-optimization

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What its author says it does

Copied from the file, not written here

Optimizes API performance through payload reduction, caching strategies, and compression techniques. Use when improving API response times, reducing bandwidth usage, or implementing efficient caching.

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

2.0 KB, 448 tokens by cl100k_base, as published. Nobody here has run it

API Response Optimization

Reduce payload sizes, implement caching, and enable compression for faster APIs.

Sparse Fieldsets

// Allow clients to select fields: GET /users?fields=id,name,email
app.get('/users', async (req, res) => {
  const fields = req.query.fields?.split(',') || null;
  const users = await User.find({}, fields?.join(' '));
  res.json(users);
});

HTTP Caching Headers

app.get('/products/:id', async (req, res) => {
  const product = await Product.findById(req.params.id);
  const etag = crypto.createHash('md5').update(JSON.stringify(product)).digest('hex');

  if (req.headers['if-none-match'] === etag) {
    return res.status(304).end();
  }

  res.set({
    'Cache-Control': 'public, max-age=3600',
    'ETag': etag
  });
  res.json(product);
});

Response Compression

const compression = require('compression');

app.use(compression({
  filter: (req, res) => {
    if (req.headers['x-no-compression']) return false;
    return compression.filter(req, res);
  },
  level: 6  // Balance between speed and compression
}));

Performance Targets

Metric	Target
Response time	<100ms (from 500ms)
Payload size	<50KB (from 500KB)
Server CPU	<30% (from 80%)

Optimization Checklist

Remove sensitive/unnecessary fields from responses
Implement sparse fieldsets
Add ETag/Last-Modified headers
Enable gzip/brotli compression
Use pagination for collections
Eager load to prevent N+1 queries
Monitor with APM tools

Best Practices

Cache immutable resources aggressively
Use short TTL for frequently changing data
Invalidate cache on writes
Compress responses >1KB
Profile before optimizing

Gives 0 of the 12 instructions most performance cost skills give in 448 tokens

Counted across 803 of the 1,058 authors here whose files we hold, read 2026-08-07

keep skill files under 500 linesin 82 of 803, across 16 files
use imperative form in instructionsin 80 of 803, across 9 files
draft assertions while test runs are in progressin 75 of 803, across 9 files
create two to three realistic test promptsin 74 of 803, across 9 files
write skill descriptions to be pushyin 72 of 803, across 7 files
save test cases to evals jsonin 72 of 803, across 6 files
ask questions about edge cases and input formatsin 72 of 803, across 7 files
save timing data immediately when runs completein 70 of 803, across 5 files
include all trigger conditions in the skill descriptionin 69 of 803, across 3 files
launch all test runs in a single turnin 69 of 803, across 3 files
capture intent before writing a skillin 67 of 803, across 1 file
import directly instead of barrel filesin 52 of 803, across 15 files

Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once. Length counted with cl100k_base; the agent that loads this file may tokenize it differently.