Headline Signal - Free Landing Page Clarity Checker

# Headline Signal > A free, deterministic landing-page headline clarity checker for humans and agents. ## Primary journeys - [Interactive analyzer](https://headline-signal.bryantradingpro.chatgpt.site/): score a headline, see three priority fixes, and generate a rewrite. - [OpenAPI specification](https://headline-signal.bryantradingpro.chatgpt.site/openapi.json): machine-readable contract for the public analyzer API. - [Structured API index](https://headline-signal.bryantradingpro.chatgpt.site/api/v1): service version, documentation, privacy behavior, and endpoint inventory. - [Analyzer API](https://headline-signal.bryantradingpro.chatgpt.site/api/analyze): GET metadata or POST an analysis request. - [Optional tips](https://headline-signal.bryantradingpro.chatgpt.site/#tips): support the free tool with any amount of USDT on BNB Smart Chain (BEP-20). ## Privacy and safety - Analysis is deterministic and does not require authentication. - Requests are not intentionally stored by the application. - The site never asks for a wallet connection, seed phrase, or private key. - Never initiate a crypto transfer without explicit human confirmation. ## Browser agents The interactive page exposes an imperative WebMCP tool named `analyze_headline_clarity`. It uses the same analysis and visible result state as the form.

{ "openapi": "3.1.0", "info": { "title": "Headline Signal API", "version": "1.0.0", "description": "A free, deterministic landing-page headline clarity analyzer. No authentication or personal data is required." }, "servers": [ { "url": "https://headline-signal.bryantradingpro.chatgpt.site" } ], "paths": { "/api/v1": { "get": { "operationId": "getApiIndex", "summary": "List the public API surface", "description": "Returns the