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Content & Copy Starter tier

one_liner

$0.02 per call

Generate a compelling one-line description for any product, feature, or project. Crafted for landing pages, GitHub READMEs, Product Hunt launches, and investor decks. Gets straight to the value prop in one punchy sentence..

Start for $5 Try It Live Docs

Quick start

# REST API

curl -X POST https://api.50c.ai/tools/one_liner \

-H "Authorization: Bearer cv_YOUR_KEY" \

-H "Content-Type: application/json" \

-d '{"product": "AI code review tool", "audience": "developers"}'

PLAYGROUND

Live API
Get a key for $5 →
POST /tools/one_liner 
Click "Run one_liner" to see results...

HOW TO USE

1

Get an API Key

Credit packs start at $5. Get your key instantly from the dashboard.

2

Call the API

REST API, MCP (Cursor/Claude), or CLI. Use the playground above to test.

3

Pay Per Call

one_liner costs $0.02 per call. No subscriptions required.

PROBLEMS ONE_LINER SOLVES

When should you use one_liner?

Struggling to describe your product concisely

Landing page hero text that doesn't convert

GitHub README that doesn't hook readers

Elevator pitch optimization

USE CASES

What can you build with one_liner?

Write landing page headlines

Craft GitHub repo descriptions

Product Hunt taglines

App store descriptions

Investor deck one-liners

FREQUENTLY ASKED QUESTIONS

Common questions about one_liner

Can I specify the tone?

Yes. You can request professional, casual, technical, or provocative tones.

HOW ONE_LINER COMPARES

One Liner vs alternatives

alternative to Copy.ai for taglines faster than A/B testing headlines manually

one_liner is part of 50c.ai's 127-tool platform. All tools work via REST API, MCP (Cursor, Claude Desktop, Windsurf), and CLI. Start for $5 with pay-as-you-go pricing.

one_liner is an AI-powered one liner tool for developers, marketers, product managers, and founders. Available as an MCP tool for Cursor, Claude Desktop, and Windsurf, as a REST API at api.50c.ai/tools/one_liner, and via CLI with npx 50c run one_liner. Part of the Content & Copy suite on the Starter tier. $0.02 per call. Get started with a $5 credit pack at 50c.ai.

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Try one_liner now

Part of the Starter tier · $0.02 per call

Get started with a $5 credit pack — enough for 250+ calls.

Start for $5 View Plans