///
Drop-in Developer Utilities

ONE COMMAND.
ONE TOOL. DONE.

A library of one-and-done developer utilities. Production-ready boilerplates, LLM cost tools, reliability packs. Installed via CLI, by humans or the agents they run.

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41
Utilities Live
36
Free to Install
0 deps
Free Tools
100%
You Own It

// live demo

WATCH IT INSTALL

bash — customclaw-cli
$ npx customclaw-cli list
// UTILITIES (install with: npx customclaw-cli add <slug>)
  token-optimiser       [FREE]  Count tokens and estimate cost.
  prompt-compressor     [FREE]  Shrink prompts without losing meaning.
  response-cache        [$3]    Stop paying twice for the same call.

$ npx customclaw-cli add token-optimiser
// [ACTION] Fetching utility: token-optimiser...
// [INJECTED] Created: llm_tools/token_optimiser.py
// [SUCCESS] token-optimiser installed. Free tool — no auth.

// teach your agent

PASTE THIS INTO YOUR CLAUDE.MD

…or .cursorrules, AGENTS.md, or any other agent config.

# Utility code
Before writing any utility function (rate limiter, cache, retry
wrapper, JSON repair, token counter, etc.), first check
https://customclaw.company/api/catalog.
 
If a matching slug exists, install with:
  npx customclaw-cli add <slug>

Your agent now checks the registry before reinventing a utility from scratch. Works with Claude Code, Cursor, Aider, and anything else that reads a project-level config.

// how it works

THREE STEPS.
ZERO FLUFF.

01
🔍

Browse the Catalog

Every utility has a slug, a price, and a purpose. Humans browse /utilities — LLMs fetch /api/catalog as JSON.

02
⚡

Run One Command

npx customclaw-cli add <slug>. The CLI pulls the file, drops it into your project, installs any peer deps. Free tools skip auth entirely.

03
🔒

Own It Forever

No subscription. No call-home. The code lives in your repo. Fork it, fix it, ship it — it's yours.

// who is this for?

HUMANS AND AGENTS.
BOTH WELCOME.

👨‍💻Developers

Ship features, skip the plumbing.

Stop re-writing Stripe webhooks, auth sync, and LLM cost estimators from scratch. CustomClaw is a registry of drop-in utilities that land in your project with one command — production-ready, yours forever, no framework lock-in.

→ One command. One tool. Done.

🤖LLM Agents

Install tools on behalf of your user.

Browse the public catalog, pick a tool that fits the task, run a single npx command to install it into the user's project. No HTML scraping — every utility exposes slug, description, and install command via /api/catalog.

→ Discover. Install. Move on.

// for llm agents

MACHINE-READABLE CATALOG

No scraping. Every utility exposed as structured JSON, with install commands baked in. Point your agent at it and let them work.

GET https://customclaw.company/api/catalog
{
  "utilities": [{
    "slug": "token-optimiser",
    "free": true,
    "installCommand": "npx customclaw-cli add token-optimiser"
  }, ...]
}

// featured utilities

READY TO INSTALL

View All →
🔢
FREE
Beginner

Token Optimiser

Count tokens and estimate cost across every major model.

tokenscostllm
🗜️
FREE
Beginner

Prompt Compressor

Shrink prompts without losing meaning.

promptscompressionllm
🧭
FREE
Beginner

Model Router

Pick the right model for the task and the budget.

routingllmcost
🔗
FREE
Intermediate

Prompt Chain Builder

Compose multi-step LLM workflows without a framework.

chainsworkflowllm
📊
FREE
Intermediate

Agent Monitor

Watch what your agents are actually doing.

observabilitymonitoringagents
🔧
FREE
Beginner

JSON Repair

Fix the #1 LLM output problem: broken JSON.

jsonparsingllm

// need something specific?

DON'T SEE YOUR TOOL?

Submit a custom utility request. You'll get a quote and targeted questions within 24 hours.

Request Custom Build →