# Services from apex-api-gamma.vercel.app on Zero

> apex-api-gamma.vercel.app serves 119 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/apex-api-gamma.vercel.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/apex-api-gamma.vercel.app/health.json

## Services

- [JWT Encode — Sign and Generate JSON Web Tokens](https://www.zero.xyz/c/jwt-encode-sign-and-generate-json-web-tokens-4579b050/llms.txt): $0.119464/call via x402. Encodes and signs a payload into a JWT (JSON Web Token) string using standard algorithms
- [JWT Decode](https://www.zero.xyz/c/jwt-decode-bd281363/llms.txt): $0.160058/call via x402. Decodes a JSON Web Token (JWT) to reveal its header, payload, and signature components without verification
- [ApexAPI QR Code Generator](https://www.zero.xyz/c/apexapi-qr-code-generator-cb582020/llms.txt): $0.071198/call via x402. Generates a QR code image from a given input string or URL
- [ApexAPI HTML to Text Converter](https://www.zero.xyz/c/apexapi-html-to-text-converter-f3c61595/llms.txt): $0.05686/call via x402. Converts HTML markup into plain text by stripping tags and formatting
- [ApexAPI QR Code Decode](https://www.zero.xyz/c/apexapi-qr-code-decode-18a1840f/llms.txt): $0.095165/call via x402. Decodes a QR code image or data URL and extracts the encoded text or URL content
- [ApexAPI Cron Expression Parser](https://www.zero.xyz/c/apexapi-cron-expression-parser-09291653/llms.txt): $0.067996/call via x402. Parses a cron expression string and returns a human-readable description, next run times, and schedule metadata
- [ApexAPI Barcode Generator](https://www.zero.xyz/c/apexapi-barcode-generator-0c23c302/llms.txt): $0.052905/call via x402. Generates a barcode image from a given input string or query
- [ApexAPI Base64 Decode](https://www.zero.xyz/c/apexapi-base64-decode-8db53e1d/llms.txt): $0.093112/call via x402. Decodes a Base64-encoded string back into its original plaintext representation
- [ApexAPI Length Unit Converter](https://www.zero.xyz/c/apexapi-length-unit-converter-24a94f7a/llms.txt): $0.147418/call via x402. Converts a length value from one unit of measurement to another (e.g. meters to feet, miles to kilometers)
- [ApexAPI BMI Calculator](https://www.zero.xyz/c/apexapi-bmi-calculator-1bbd4c5b/llms.txt): $0.068968/call via x402. Calculates Body Mass Index (BMI) given weight and height inputs, returning BMI value and health category classification
- [ApexAPI Image Describe](https://www.zero.xyz/c/apexapi-image-describe-2f84485b/llms.txt): $0.195281/call via x402. Analyzes an image and returns a natural language description of its contents
- [ApexAPI AI Poem Generator](https://www.zero.xyz/c/apexapi-ai-poem-generator-0fbff4e5/llms.txt): $0.068102/call via x402. Generates a creative poem based on a text query or topic prompt, paid per call in USDC on Base via x402
- [ApexAPI LinkedIn Post Generator](https://www.zero.xyz/c/apexapi-linkedin-post-generator-2a10584a/llms.txt): $0.057449/call via x402. Generates or publishes LinkedIn post content using AI, based on a search query or topic input
- [ApexAPI AI Hashtag Generator](https://www.zero.xyz/c/apexapi-ai-hashtag-generator-6d1e3831/llms.txt): $0.068188/call via x402. Generates relevant hashtags for a given topic or query using AI, optimized for social media discovery
- [ApexAPI Weight Converter](https://www.zero.xyz/c/apexapi-weight-converter-a939e94f/llms.txt): $0.07817/call via x402. Converts weight values between different units of measurement (e.g. kg, lbs, oz, grams, stones)
- [ApexAPI Named Entity Recognition (NER)](https://www.zero.xyz/c/apexapi-named-entity-recognition-ner-be9e25d2/llms.txt): $0.140649/call via x402. Extracts named entities (people, organizations, locations, dates, etc.) from a given text query using AI-powered NER.
- [ApexAPI Geo Distance Calculator](https://www.zero.xyz/c/apexapi-geo-distance-calculator-4b97d619/llms.txt): $0.117955/call via x402. Calculates the geographic distance between two locations using coordinate or address inputs
- [ApexAPI Area Unit Converter](https://www.zero.xyz/c/apexapi-area-unit-converter-12b46a9e/llms.txt): $0.170571/call via x402. Converts area measurements between different units (e.g. square meters to acres, hectares to square feet)
- [ApexAPI Text-to-Speech (TTS)](https://www.zero.xyz/c/apexapi-text-to-speech-tts-5ee7afb5/llms.txt): $0.080678/call via x402. Converts input text into synthesized audio speech using an AI text-to-speech engine, returning audio content.
- [ApexAPI AI Image Generation](https://www.zero.xyz/c/apexapi-ai-image-generation-2289c5b7/llms.txt): $0.192696/call via x402. Generates images from a text prompt using AI, accessible via pay-per-call USDC payment on Base with no API key required.
- [ApexAPI Forex Currency Conversion](https://www.zero.xyz/c/apexapi-forex-currency-conversion-ca65334c/llms.txt): $0.060769/call via x402. Converts an amount from one currency to another using live or near-real-time foreign exchange rates
- [ApexAPI YouTube Script Generator](https://www.zero.xyz/c/apexapi-youtube-script-generator-6a095b48/llms.txt): $0.198008/call via x402. Generates a YouTube video script based on a search query or topic input
- [ApexAPI Base64 Encode](https://www.zero.xyz/c/apexapi-base64-encode-ce4bd06a/llms.txt): $0.052518/call via x402. Encodes a string or data input into its Base64 representation
- [ApexAPI Cover Letter Generator](https://www.zero.xyz/c/apexapi-cover-letter-generator-957f11a1/llms.txt): $0.173236/call via x402. Generates a tailored professional cover letter based on a user-provided query describing their job application context
- [ApexAPI Crypto Address Balance Lookup](https://www.zero.xyz/c/apexapi-crypto-address-balance-lookup-25f9112a/llms.txt): $0.130773/call via x402. Retrieves the cryptocurrency balance for a given blockchain wallet address
- [ApexAPI Geo Isoline](https://www.zero.xyz/c/apexapi-geo-isoline-0ac36b4c/llms.txt): $0.063111/call via x402. Generates geographic isoline (isochrone/isodistance) contours around a point based on travel time or distance
- [ApexAPI Instagram Caption Generator](https://www.zero.xyz/c/apexapi-instagram-caption-generator-de7bf4d5/llms.txt): $0.093609/call via x402. Generates AI-written captions for Instagram posts based on a text query or topic input
- [ApexAPI Podcast Outline Generator](https://www.zero.xyz/c/apexapi-podcast-outline-generator-a716efe9/llms.txt): $0.098095/call via x402. Generates a structured podcast episode outline from a given topic or query
- [ApexAPI Pressure Unit Converter](https://www.zero.xyz/c/apexapi-pressure-unit-converter-dce97208/llms.txt): $0.189918/call via x402. Converts pressure values between different units (e.g. Pascal, bar, PSI, atm, mmHg)
- [ApexAPI Geo Directions](https://www.zero.xyz/c/apexapi-geo-directions-26fafb89/llms.txt): $0.144254/call via x402. Returns turn-by-turn directions between two or more locations, including route, distance, and travel time.
- [ApexAPI Text Readability Analyzer](https://www.zero.xyz/c/apexapi-text-readability-analyzer-ed81f874/llms.txt): $0.197271/call via x402. Analyzes a block of text and returns readability scores and metrics to assess how easy it is to read
- [ApexAPI Geo Address Validator](https://www.zero.xyz/c/apexapi-geo-address-validator-cbcf84a6/llms.txt): $0.060722/call via x402. Validates a geographic address string to confirm it is a real, properly formatted, and deliverable postal address
- [ApexAPI URL Expander](https://www.zero.xyz/c/apexapi-url-expander-23f8802f/llms.txt): $0.144662/call via x402. Expands shortened or obfuscated URLs to reveal their full destination URL
- [ApexAPI URL Shortener](https://www.zero.xyz/c/apexapi-url-shortener-b8f92850/llms.txt): $0.059672/call via x402. Shortens a long URL into a compact, shareable short link
- [ApexAPI Volume Unit Converter](https://www.zero.xyz/c/apexapi-volume-unit-converter-fadd4ae9/llms.txt): $0.169016/call via x402. Converts a volume measurement from one unit to another (e.g., liters to gallons, milliliters to cubic inches)
- [ApexAPI Regex Generator](https://www.zero.xyz/c/apexapi-regex-generator-455518be/llms.txt): $0.199877/call via x402. Generates a regular expression pattern from a natural language description of what to match
- [ApexAPI Color Converter](https://www.zero.xyz/c/apexapi-color-converter-4e26987d/llms.txt): $0.070734/call via x402. Converts colors between different color formats and representations (e.g., HEX, RGB, HSL, CMYK)
- [ApexAPI AI Headlines](https://www.zero.xyz/c/apexapi-ai-headlines-0f8f3f55/llms.txt): $0.057405/call via x402. Fetches AI-related news headlines based on a search query
- [ApexAPI AI Email Generator](https://www.zero.xyz/c/apexapi-ai-email-generator-d771fc3c/llms.txt): $0.152864/call via x402. Generates AI-written email content based on a provided query or prompt
- [ApexAPI Body Fat Calculator](https://www.zero.xyz/c/apexapi-body-fat-calculator-d63bc636/llms.txt): $0.053455/call via x402. Calculates estimated body fat percentage based on user-provided physical measurements or query input
- [ApexAPI AI Sentiment Analysis](https://www.zero.xyz/c/apexapi-ai-sentiment-analysis-04ee0080/llms.txt): $0.122078/call via x402. Analyzes the sentiment of a given text or search query, returning a sentiment classification (positive, negative, or neutral) with confidence signals.
- [ApexAPI AI Embeddings](https://www.zero.xyz/c/apexapi-ai-embeddings-4babcf1f/llms.txt): $0.172356/call via x402. Generates vector embeddings for a given text query or input string, suitable for semantic search and similarity tasks
- [ApexAPI Geo ETA](https://www.zero.xyz/c/apexapi-geo-eta-fed32356/llms.txt): $0.079088/call via x402. Calculates estimated travel time (ETA) between geographic locations or to a destination
- [ApexAPI Meal Plan Generator](https://www.zero.xyz/c/apexapi-meal-plan-generator-c4e90818/llms.txt): $0.193988/call via x402. Generates a personalized meal plan based on a search query or dietary input
- [ApexAPI Crypto Address Token Lookup](https://www.zero.xyz/c/apexapi-crypto-address-token-lookup-1c68b0cf/llms.txt): $0.068725/call via x402. Retrieves token holdings and balances for a given cryptocurrency wallet address
- [ApexAPI Crypto Address Transactions Lookup](https://www.zero.xyz/c/apexapi-crypto-address-transactions-lookup-d10e3bc9/llms.txt): $0.08826/call via x402. Retrieves the transaction history for a given cryptocurrency wallet address
- [ApexAPI SEO Meta Generator](https://www.zero.xyz/c/apexapi-seo-meta-generator-f04ad3a7/llms.txt): $0.099298/call via x402. Generates SEO meta tags and metadata for a given search query or topic using AI
- [ApexAPI AI Code Converter](https://www.zero.xyz/c/apexapi-ai-code-converter-ae620465/llms.txt): $0.132056/call via x402. Converts code from one programming language or format to another using AI
- [ApexAPI AI Code Generator](https://www.zero.xyz/c/apexapi-ai-code-generator-bc96a831/llms.txt): $0.088918/call via x402. Generates code snippets or complete code solutions based on a natural language query, paid per call in USDC on Base.
- [ApexAPI PDF Extract](https://www.zero.xyz/c/apexapi-pdf-extract-82343290/llms.txt): $0.078761/call via x402. Extracts text and content from PDF documents via a pay-per-call endpoint
- [ApexAPI AI Joke Generator](https://www.zero.xyz/c/apexapi-ai-joke-generator-4b71afe7/llms.txt): $0.189536/call via x402. Generates an AI-powered joke based on a user-provided query or topic
- [ApexAPI Compound Interest Calculator](https://www.zero.xyz/c/apexapi-compound-interest-calculator-5f6c8d7b/llms.txt): $0.106656/call via x402. Calculates compound interest growth given principal, rate, and time parameters
- [ApexAPI Geo Address Formatter](https://www.zero.xyz/c/apexapi-geo-address-formatter-de7da215/llms.txt): $0.091725/call via x402. Formats and standardizes a raw address query string into a properly structured, canonical address representation
- [ApexAPI Text Character Count](https://www.zero.xyz/c/apexapi-text-character-count-067af05f/llms.txt): $0.144365/call via x402. Counts the number of characters in a given text string
- [ApexAPI SEO Keyword Research](https://www.zero.xyz/c/apexapi-seo-keyword-research-1dfccd07/llms.txt): $0.195451/call via x402. Generates SEO keyword suggestions and related search terms for a given query or topic
- [ApexAPI Energy Unit Converter](https://www.zero.xyz/c/apexapi-energy-unit-converter-ec0b9e0c/llms.txt): $0.196438/call via x402. Converts energy values between different units (e.g., joules, calories, kilowatt-hours, BTUs) via a pay-per-call API using USDC on Base.
- [ApexAPI Matrix Math Operations](https://www.zero.xyz/c/apexapi-matrix-math-operations-80a8ebd2/llms.txt): $0.158326/call via x402. Performs matrix operations and computations via a paid per-call API endpoint using USDC on Base
- [ApexAPI Regex Test](https://www.zero.xyz/c/apexapi-regex-test-a22bad6d/llms.txt): $0.144119/call via x402. Tests a string against a regular expression pattern to determine if it matches
- [ApexAPI Image Variations Generator](https://www.zero.xyz/c/apexapi-image-variations-generator-173a5a38/llms.txt): $0.110839/call via x402. Generates variations of an existing image using AI, returning alternative versions based on the input
- [ApexAPI AI Slogan Generator](https://www.zero.xyz/c/apexapi-ai-slogan-generator-6763f7a2/llms.txt): $0.198687/call via x402. Generates creative marketing slogans or taglines for a given topic, brand, or product using AI
- [ApexAPI Audio Transcription](https://www.zero.xyz/c/apexapi-audio-transcription-1d63c3d1/llms.txt): $0.187285/call via x402. Transcribes audio content to text using a pay-per-call API on Base blockchain with no API key required
- [ApexAPI Crypto Transaction Trace](https://www.zero.xyz/c/apexapi-crypto-transaction-trace-afc6d1d2/llms.txt): $0.078241/call via x402. Traces a cryptocurrency transaction through the blockchain, returning detailed path and execution data for a given transaction hash or query.
- [ApexAPI AI Code Explainer](https://www.zero.xyz/c/apexapi-ai-code-explainer-8c72fea2/llms.txt): $0.055445/call via x402. Explains a given code snippet or programming concept in plain language using AI
- [ApexAPI AI Paraphrase](https://www.zero.xyz/c/apexapi-ai-paraphrase-4124825d/llms.txt): $0.092155/call via x402. Rewrites and paraphrases input text while preserving its original meaning, paid per call in USDC on Base
- [ApexAPI Temperature Converter](https://www.zero.xyz/c/apexapi-temperature-converter-12d2599e/llms.txt): $0.112724/call via x402. Converts a temperature value between units (e.g. Celsius, Fahrenheit, Kelvin) via a paid per-call API
- [ApexAPI Text Diff](https://www.zero.xyz/c/apexapi-text-diff-2e7784b0/llms.txt): $0.10891/call via x402. Computes and returns a diff between two text strings, highlighting additions, deletions, and changes.
- [ApexAPI Crypto Contract Read](https://www.zero.xyz/c/apexapi-crypto-contract-read-a401a579/llms.txt): $0.059945/call via x402. Reads data from a smart contract on a blockchain network by querying contract state or functions
- [ApexAPI Health Symptoms Checker](https://www.zero.xyz/c/apexapi-health-symptoms-checker-531973b3/llms.txt): $0.072427/call via x402. Accepts a symptom-related query and returns health information or possible diagnoses based on the described symptoms
- [ApexAPI AI Email Reply Generator](https://www.zero.xyz/c/apexapi-ai-email-reply-generator-c8068df8/llms.txt): $0.05036/call via x402. Generates an AI-crafted reply to an email based on a provided query or context input
- [ApexAPI AI Bio Generator](https://www.zero.xyz/c/apexapi-ai-bio-generator-4

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