JSONPath Extractor - Query JSON, Get Pointers + Values

MCP server for JSON operations - format, validate, diff, merge, query (JSONPath), transform, and generate schemas. Runs on Cloudflare Workers edge.

MCP server: JSON<->CSV<->YAML conversion, JSON Schema validation, JSONPath query, CSV profiling. For AI data agents.

Validate JSON content, check API responses, monitor data quality, and detect schema changes. Perfect for API testing, data validation, quality assurance, and monitoring JSON endpoints. Supports JSONPath, schema validation, and custom rules.

Change Watcher - Push Events for Web and API Changes

ernestmarza/change-watcher

Watches URLs with a CSS/XPath/regex selector or a JSONPath query, filters out timestamps, tokens, counters and other rendering noise, and emits a normalized change event only when the watched block really changed. No change, no event, no charge.

Text Keyword Extractor - RAKE Phrases + Top Words as JSON

eliai/text-keyword-extractor

Extract ranked multi-word keyword phrases (RAKE-scored) + top words from up to 200 texts per run. For tagging, SEO briefs, ticket clustering, labeling scraped content. $0.0005 per text, no start fee, junk entries never charged. No paid keyword-extraction rival with defined pricing measured.

Disposable Email Detector - Block Temp & Throwaway Emails

eliai/disposable-email-detector

Check up to 500 emails/domains per run against a 7,582-domain disposable blocklist + keyword and pattern heuristics, with ~30 legit webmail providers whitelisted. $0.0005 per check, no start fee, invalid inputs never charged — half the cheapest measured incumbent.

Regex Helper

maximedupre/regex-helper

Apply named regular expressions to submitted text or an Apify dataset. Get matches by pattern with values, positions, capture groups, and a total match count.

Validate cron expressions and compute next run times via a simple HTTP API.

Cron Expression Builder & Validator

perryay/cron-expression-builder-validator

Parse, validate, and explain cron scheduling expressions with syntax validation, next-execution calculation, human-readable descriptions, batch validation (100+ expressions), and full schedule auditing with overlap and gap detection. Ideal for DevOps, SRE, and platform engineering teams.

Deterministic Math Expression Evaluator Tool

rainminer/math-tool

Evaluate mathematical expressions deterministically for AI agents and automations. Supports arithmetic, functions, and variables via a safe expression parser. Designed for AI agents for concise, deterministic, and accurate math outputs. Use over MCP, API, or the Apify Console.