# Koyori Utils API

Koyori Utils API is a lightweight x402-powered utility API running on Cloudflare Workers.

Base URL:
https://koyori-utils-api.koyori-aibtc.workers.dev

OpenAPI:
https://koyori-utils-api.koyori-aibtc.workers.dev/openapi.json

Metadata:
https://koyori-utils-api.koyori-aibtc.workers.dev/metadata.json

Price:
0.001 STX per paid request

Available tools:
- 300 paid API endpoints (see OpenAPI for full inventory)
- SHA-256 hashing
- JSON formatting
- Character, word, and byte counting
- UUID v4 generation
- Base64 encode/decode
- URL encode/decode
- Hex encode/decode
- Unix/ISO timestamp conversion
- URL-friendly slug generation
- camelCase conversion
- PascalCase conversion
- snake_case conversion
- kebab-case conversion
- Title Case conversion
- Sentence case conversion
- Lowercase first character
- Uppercase first character
- Remove all whitespace
- Collapse repeated whitespace
- Trim leading and trailing whitespace
- Trim leading whitespace
- Trim trailing whitespace
- Repeat text a specified number of times
- Add a prefix to the beginning of text
- Add a suffix to the end of text
- Remove a matching prefix from the beginning of text
- Remove a matching suffix from the end of text
- Extract a portion of text using start and optional end positions
- Check whether text contains a search string
- Compare two JSON objects and identify added, removed, or changed fields
- Generate a basic JSON Schema from sample JSON data
- Generate sample JSON data from a basic JSON Schema
- Generate Markdown documentation from a basic JSON Schema
- Analyze properties, types and complexity of a basic JSON Schema
- Find required fields and nested paths in a basic JSON Schema
- Summarize JSON Schema data types, percentages and field paths
- Search JSON Schema fields by name or data type
- Compare two JSON Schemas for added, removed and changed fields
- Check basic JSON Schema compatibility in both directions
- Generate valid and invalid test cases from a basic JSON Schema
- Validate JSON against a basic JSON Schema subset
- Random string/integer generation
- CSV to JSON conversion
- JSON to CSV conversion
- Markdown to HTML conversion
- JSON minification
- URL parsing
- JWT decoding (no signature verification)
- HTML to Markdown conversion
- Query string parsing
- Base64URL encode/decode
- Color conversion between HEX and RGB
- Web page and text fetching
- Web page link extraction
- Web page text search
- Web page information
- Web page metadata extraction
- HTML to plain text conversion
- JSON escape/unescape conversion

Paid endpoints return HTTP 402 Payment Required when called without a valid x402 payment.