load-test

A command guide for testing how many requests an API endpoint can handle. An API endpoint is a URL that a program calls to exchange data.

In plain words
What is it for?
Use it to test an endpoint under normal, peak, and increasing stress, then record throughput, response times, errors, and available resource usage.
Why use it?
It helps reveal slowdowns, error rates, and the point where a service stops coping with increasing traffic.

Command

Part of the api-tester plugin — 2 commands shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/rohitg00/awesome-claude-code-toolkit/load-test
Clone the repo
git clone --depth 1 https://github.com/rohitg00/awesome-claude-code-toolkit

Or install api-tester, the plugin that ships this one along with the rest of its 2 commands.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 483 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00483
Opus 5 $0.00000 $0.00242
Sonnet 5 $0.00000 $0.00097
Haiku 4.5 $0.00000 $0.00048

Measured 3d ago against content hash b16d3fcfa95f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

load-test scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/api-tester/commands/load-test.md · 54 lines

What it actually says

Run a load test against an API endpoint to measure throughput and identify breaking points.

Steps

  1. Define load test parameters:
    • Target URL and HTTP method.
    • Concurrent connections (start low, ramp up).
    • Duration of the test.
    • Request payload and headers.
  2. Select the load testing tool:
    • wrk or wrk2 for HTTP benchmarking.
    • k6 for scripted load tests.
    • ab (Apache Bench) for simple tests.
    • hey for quick Go-based load tests.
  3. Run a warm-up phase with low concurrency (10 connections, 10 seconds).
  4. Execute the main load test in stages:
    • Stage 1: Normal load (expected concurrent users).
    • Stage 2: Peak load (2x expected).
    • Stage 3: Stress test (increase until error rate > 5%).
  5. Collect metrics at each stage:
    • Requests per second (throughput).
    • Latency distribution (P50, P95, P99).
    • Error rate and error types.
    • Resource utilization (CPU, memory) if accessible.
  6. Identify the breaking point and bottleneck.
  7. Generate a report with recommendations.

Format

Load Test: <METHOD> <endpoint>

| Stage | Concurrency | RPS | P50 (ms) | P99 (ms) | Errors |
|-------|-------------|-----|----------|----------|--------|
| Normal | 10 | 500 | 20 | 85 | 0% |
| Peak | 50 | 1200 | 45 | 200 | 0.1% |
| Stress | 200 | 800 | 500 | 2000 | 5.2% |

Breaking point: ~150 concurrent connections
Bottleneck: Database connection pool exhaustion

Recommendations:
  1. Increase connection pool size from 10 to 50
  2. Add connection queuing with backpressure

Rules

  • Never run load tests against production without explicit permission.
  • Always include a warm-up phase before measuring.
  • Ramp up gradually; do not jump to maximum load immediately.
  • Record baseline metrics before the test for comparison.
  • Stop the test if error rate exceeds 10% to avoid cascading failures.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 54 lines · 0 tokens per session scan A b16d3fcfa95f

Subscribe to this mod's changes

load-test is a command published in the GitHub repository rohitg00/awesome-claude-code-toolkit (2,578 stars, last pushed 3mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 483 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.