# Services from x402-zoo.lolagent.workers.dev on Zero

> x402-zoo.lolagent.workers.dev serves 49 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/x402-zoo.lolagent.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-zoo.lolagent.workers.dev/health.json

## Services

- [Airport Code & Name Lookup](https://www.zero.xyz/c/airport-code-name-lookup-f502e318/llms.txt): $0.002/call via x402. Resolves IATA/ICAO airport codes or airport name queries to city, country, coordinates, and timezone using a curated dataset.
- [WCAG Color Contrast Ratio Calculator](https://www.zero.xyz/c/wcag-color-contrast-ratio-calculator-db6d8197/llms.txt): $0.001/call via x402. Calculates the contrast ratio between two HEX colors and evaluates WCAG AA and AAA accessibility thresholds for text.
- [Filename Sanitizer](https://www.zero.xyz/c/filename-sanitizer-237b3cef/llms.txt): $0.001/call via x402. Converts arbitrary text into a safe, cross-platform filename by replacing illegal or problematic characters
- [Palindrome Checker](https://www.zero.xyz/c/palindrome-checker-b7a98425/llms.txt): $0.001/call via x402. Checks whether a given text string is a palindrome after normalizing case, punctuation, and whitespace.
- [Website Change Detector](https://www.zero.xyz/c/website-change-detector-9662c5ba/llms.txt): $0.01/call via x402. Fetches a public webpage and compares its current text to caller-supplied prior text, reporting whether the content has changed.
- [x402-zoo NPC Generator](https://www.zero.xyz/c/x402-zoo-npc-generator-7a8324ff/llms.txt): $0.002/call via x402. Generates a structured fictional non-player character (NPC) with identity, role, personality, motive, secret, and mannerism attributes.
- [ISO Country Code & Name Resolver](https://www.zero.xyz/c/iso-country-code-name-resolver-b9267f4f/llms.txt): $0.001/call via x402. Resolves country names and ISO alpha-2/alpha-3 codes to normalized country identifiers using a bundled country table.
- [Email Extractor – x402-zoo.lolagent.workers.dev](https://www.zero.xyz/c/email-extractor-x402-zoo-lolagent-workers-dev-e5bf41d8/llms.txt): $0.001/call via x402. Extracts all email-address-like strings from a block of caller-supplied plain text
- [JSON Repair API](https://www.zero.xyz/c/json-repair-api-30204d24/llms.txt): $0.002/call via x402. Repairs common malformed JSON patterns and returns strict, parseable JSON
- [Random Country Lookup](https://www.zero.xyz/c/random-country-lookup-d396f6d3/llms.txt): $0.001/call via x402. Returns a randomly selected real sovereign country with its ISO alpha-2, alpha-3 codes, and Unicode flag emoji
- [Scrabble Score Calculator](https://www.zero.xyz/c/scrabble-score-calculator-d4d5ac56/llms.txt): $0.001/call via x402. Calculates the English Scrabble tile score for a given word or phrase, returning a total score and per-letter breakdown.
- [Tournament Bracket Generator](https://www.zero.xyz/c/tournament-bracket-generator-01fe304b/llms.txt): $0.001/call via x402. Generates randomized first-round single-elimination tournament pairings from a comma-separated list of participant names.
- [List Shuffle API](https://www.zero.xyz/c/list-shuffle-api-8919332b/llms.txt): $0.001/call via x402. Randomly reorders a caller-supplied list of items for fairness, games, experiments, or randomized workflows.
- [Cron Expression to Plain-Language Explainer](https://www.zero.xyz/c/cron-expression-to-plain-language-explainer-eb30fce2/llms.txt): $0.001/call via x402. Parses a five-field cron expression and returns a human-readable plain-language description of its schedule
- [Country Flag Emoji Resolver](https://www.zero.xyz/c/country-flag-emoji-resolver-5f90bc2d/llms.txt): $0.001/call via x402. Resolves a country name or ISO alpha-2/alpha-3 code to its Unicode flag emoji and normalized country identifiers
- [Deck Shuffle API](https://www.zero.xyz/c/deck-shuffle-api-2a508227/llms.txt): $0.001/call via x402. Returns a randomly shuffled 52-card deck, with optional seed for reproducible results
- [Random Choice from List](https://www.zero.xyz/c/random-choice-from-list-0fc222b5/llms.txt): $0.001/call via x402. Randomly selects one item from a caller-supplied comma-separated list for decisions, games, experiments, or sampling.
- [Weighted Random Choice Selector](https://www.zero.xyz/c/weighted-random-choice-selector-89e06a8d/llms.txt): $0.001/call via x402. Randomly selects one item from a caller-supplied list using provided probability weights, useful for routing, games, and simulations.
- [Markdown Table Generator](https://www.zero.xyz/c/markdown-table-generator-5612243b/llms.txt): $0.001/call via x402. Converts compact headers and rows query parameters into a valid Markdown table string
- [RPG Quest Generator](https://www.zero.xyz/c/rpg-quest-generator-d49aeae1/llms.txt): $0.002/call via x402. Generates a structured fictional RPG quest with objective, obstacle, twist, reward, and failure consequence from optional seed, genre, location, and difficulty parameters.
- [Internet Archive Wayback Snapshot Comparison](https://www.zero.xyz/c/internet-archive-wayback-snapshot-comparison-9903dedc/llms.txt): $0.05/call via x402. Fetches two Wayback Machine snapshots near caller-supplied dates for a URL and returns the snapshot URLs plus textual evidence of changes between them.
- [Password Pronounceability Scorer](https://www.zero.xyz/c/password-pronounceability-scorer-35695932/llms.txt): $0.001/call via x402. Heuristically scores how easy a given string (such as a password or word) is to pronounce aloud.
- [x402-zoo Story Seed Generator](https://www.zero.xyz/c/x402-zoo-story-seed-generator-0fe842ad/llms.txt): $0.002/call via x402. Generates a fictional structured story prompt with protagonist, goal, obstacle, setting, and twist via a paid GET endpoint.
- [x402-zoo Random City Lookup](https://www.zero.xyz/c/x402-zoo-random-city-lookup-cb50de4c/llms.txt): $0.001/call via x402. Returns a real city from a curated worldwide sample, including country and geographic coordinates.
- [x402-zoo Dice Roller](https://www.zero.xyz/c/x402-zoo-dice-roller-2308917d/llms.txt): $0.001/call via x402. Rolls dice using standard tabletop notation (e.g. d20, 2d6, 3d8+2) and returns the result for RPGs, simulations, and randomized decisions.
- [Levenshtein Edit Distance & Similarity API](https://www.zero.xyz/c/levenshtein-edit-distance-similarity-api-50a7a65f/llms.txt): $0.001/call via x402. Calculates the Levenshtein edit distance and normalized similarity score between two strings for fuzzy matching and typo detection.
- [ISO Week Number Resolver](https://www.zero.xyz/c/iso-week-number-resolver-24ab7de9/llms.txt): $0.001/call via x402. Resolves an ISO calendar date to its corresponding ISO week-year and week number (ISO 8601).
- [Age on Date Calculator](https://www.zero.xyz/c/age-on-date-calculator-eb3f6acb/llms.txt): $0.001/call via x402. Calculates the completed age in years of a person on a specified date given their ISO birth date.
- [MIME Type Guesser from Filename](https://www.zero.xyz/c/mime-type-guesser-from-filename-f967ce06/llms.txt): $0.001/call via x402. Returns the MIME type for a given filename by inspecting its extension, with an optional declared-type fallback if the extension is ambiguous or unrecognized.
- [Lunar Phase Calculator](https://www.zero.xyz/c/lunar-phase-calculator-e862a9dc/llms.txt): $0.001/call via x402. Calculates approximate lunar phase, illumination percentage, and lunar age for a given date.
- [Text-to-URL Slug Converter](https://www.zero.xyz/c/text-to-url-slug-converter-8854bdc3/llms.txt): $0.001/call via x402. Converts arbitrary text into a lowercase, ASCII-friendly URL slug suitable for use in URLs and identifiers.
- [NATO Phonetic Alphabet Converter](https://www.zero.xyz/c/nato-phonetic-alphabet-converter-4d6c76f3/llms.txt): $0.001/call via x402. Converts any text string into its NATO phonetic alphabet spelling (e.g. 'ABC' → 'Alfa Bravo Charlie')
- [Website Technology Detector](https://www.zero.xyz/c/website-technology-detector-5ac1a8b7/llms.txt): $0.005/call via x402. Detects web technologies used by a public webpage by analyzing its HTTP response headers and HTML signatures.
- [Phone Number Normalizer](https://www.zero.xyz/c/phone-number-normalizer-3b0f55d6/llms.txt): $0.001/call via x402. Normalizes caller-supplied phone numbers into international E.164-style formatting, with optional country context for ambiguous local numbers.
- [x402-zoo Checksum & Hash Calculator](https://www.zero.xyz/c/x402-zoo-checksum-hash-calculator-44bdf55a/llms.txt): $0.001/call via x402. Computes SHA-family (e.g. SHA-256, SHA-512) or FNV-1a checksums for any caller-supplied text string.
- [x402-zoo What Number Customer Am I](https://www.zero.xyz/c/x402-zoo-what-number-customer-am-i-1cbe7e01/llms.txt): $0.0001/call via x402. Returns your sequential customer number for a micro-payment curiosity experiment using the x402 payment protocol.
- [x402-zoo Fictional Fact Generator](https://www.zero.xyz/c/x402-zoo-fictional-fact-generator-e92f39aa/llms.txt): $0.001/call via x402. Generates a concise, clearly-labeled fictional fact-like statement, optionally seeded by topic or random seed.
- [Coin Flip — Fair Binary Random Outcome](https://www.zero.xyz/c/coin-flip-fair-binary-random-outcome-47ee332b/llms.txt): $0.001/call via x402. Returns a fair random heads or tails result for binary decisions, simulations, games, and randomized agent workflows.
- [x402 Paid-Before-You Purchase Counter](https://www.zero.xyz/c/x402-paid-before-you-purchase-counter-cb5f7e26/llms.txt): $0.0001/call via x402. Returns the sequential purchase number of this call among all successful paid requests to this endpoint, functioning as a tiny x402 micropayment experiment.
- [Random Color Generator](https://www.zero.xyz/c/random-color-generator-8958f792/llms.txt): $0.001/call via x402. Generates a random RGB and hexadecimal color value for use in design, testing, palettes, and procedural content.
- [JSON Diff Comparator](https://www.zero.xyz/c/json-diff-comparator-3ed9cf87/llms.txt): $0.002/call via x402. Compares two JSON values and returns structured lists of changed, added, and removed paths between them.
- [Domain Parts Parser (x402-zoo.lolagent.workers.dev)](https://www.zero.xyz/c/domain-parts-parser-x402-zoo-lolagent-workers-dev-326015b4/llms.txt): $0.001/call via x402. Parses a URL or hostname into its constituent parts — subdomain, registrable domain, and public suffix — using a bundled common-suffix table.
- [x402-zoo URL Extractor](https://www.zero.xyz/c/x402-zoo-url-extractor-402d7601/llms.txt): $0.001/call via x402. Extracts and normalizes all HTTP/HTTPS URLs found within a block of caller-supplied text.
- [x402-zoo Random Sentence Generator](https://www.zero.xyz/c/x402-zoo-random-sentence-generator-74a11b8b/llms.txt): $0.001/call via x402. Generates a grammatically plausible synthetic sentence explicitly labeled as unverified
- [Roman Numeral Converter](https://www.zero.xyz/c/roman-numeral-converter-5f84c1fa/llms.txt): $0.001/call via x402. Converts integers to canonical Roman numerals or Roman numerals back to integers via a GET request.
- [Random ISO Date Generator](https://www.zero.xyz/c/random-iso-date-generator-88d16e80/llms.txt): $0.001/call via x402. Generates a random ISO 8601 calendar date, optionally constrained between a start and end date, for use in tests and simulations.
- [CSV Cleaner – Trim Fields & Standardize Format](https://www.zero.xyz/c/csv-cleaner-trim-fields-standardize-format-2b2119f6/llms.txt): $0.002/call via x402. Normalizes a caller-supplied CSV string by trimming whitespace from fields, standardizing row widths, and fixing line endings.
- [x402-zoo Random Trivia Fact](https://www.zero.xyz/c/x402-zoo-random-trivia-fact-491ec0fb/llms.txt): $0.001/call via x402. Returns a short curated trivia fact with a descriptive source label from a static set, optionally seeded for reproducibility.
- [Dice Notation Parser](https://www.zero.xyz/c/dice-notation-parser-2d219372/llms.txt): $0.001/call via x402. Parses and validates tabletop RPG dice notation expressions (e.g. d20, 2d6, 3d8+2) without rolling them, returning structured components.

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

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