# Services from text-metrics.x402tookit.com on Zero

> text-metrics.x402tookit.com serves 7 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/text-metrics.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/text-metrics.x402tookit.com/health.json

## Services

- [Text Length Limits Checker](https://www.zero.xyz/c/text-length-limits-checker-176d7cdc/llms.txt): $0.02/call via x402. Checks a piece of text against SMS segment limits (GSM-7 vs Unicode), tweet character weight, meta description, title tag, and push notification length constraints.
- [Text Analysis Tools – Keyword Extraction](https://www.zero.xyz/c/text-analysis-tools-keyword-extraction-3e796dc8/llms.txt): $0.02/call via x402. Extracts the top N keywords and two-word phrases from English text by frequency, returning counts and percentage share after removing stopwords.
- [Text Diff — Word-Level Change Analysis](https://www.zero.xyz/c/text-diff-word-level-change-analysis-f7d85e1f/llms.txt): $0.02/call via x402. Computes a word-level diff of two texts, returning counts of added, removed, and kept words, changed spans, and a percentage-changed score.
- [Text Case Converter](https://www.zero.xyz/c/text-case-converter-c05bac53/llms.txt): $0.02/call via x402. Converts an input text string into multiple case formats: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, UPPERCASE, lowercase, and URL slug.
- [Text Readability Analysis](https://www.zero.xyz/c/text-readability-analysis-c84a5277/llms.txt): $0.02/call via x402. Scores English text on six readability formulas (Flesch ease, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI) and returns a consensus grade level.
- [Text Similarity Scorer](https://www.zero.xyz/c/text-similarity-scorer-a2be0f0b/llms.txt): $0.02/call via x402. Compares two texts using edit distance, Jaccard word overlap, and cosine similarity, returning numeric scores and a same/similar/different verdict.
- [Text Language Guesser](https://www.zero.xyz/c/text-language-guesser-54271e18/llms.txt): $0.02/call via x402. Detects the language of a text snippet from 8 European languages and returns a ranked confidence score.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)