# Services from x402-gateway-production-1f21.up.railway.app on Zero

> x402-gateway-production-1f21.up.railway.app serves 74 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-gateway-production-1f21.up.railway.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-gateway-production-1f21.up.railway.app/health.json

## Services

- [Coinbase Exchange OHLCV Candles API](https://www.zero.xyz/c/coinbase-exchange-ohlcv-candles-api-7713c349/llms.txt): $0.005/call via x402. Returns OHLCV (open, high, low, close, volume) candlestick data for a Coinbase Exchange crypto trading pair at configurable time granularities
- [Web Page Metadata Extractor](https://www.zero.xyz/c/web-page-metadata-extractor-c1781b7c/llms.txt): $0.001/call via x402. Extracts structured metadata from one or more URLs, including title, description, Open Graph, Twitter cards, canonical URL, robots directives, headings, and JSON-LD.
- [Industrial Platform Web Tools – Hash (SHA-256/SHA-512/SHA-1/MD5)](https://www.zero.xyz/c/industrial-platform-web-tools-hash-sha-256-sha-512-sha-1-md5-c23dd0e8/llms.txt): $0.001/call via x402. Computes a cryptographic hash (SHA-256, SHA-512, SHA-1, or MD5) for a UTF-8 text input and returns both hex-encoded and Base64-encoded digests.
- [ERC-20 Token Allowance Checker](https://www.zero.xyz/c/erc-20-token-allowance-checker-201fefe3/llms.txt): $0.001/call via x402. Looks up the current ERC-20 token allowance granted by an owner address to a spender address on a given contract and network.
- [Crypto Wallet Balance Lookup](https://www.zero.xyz/c/crypto-wallet-balance-lookup-5e263450/llms.txt): $0.001/call via x402. Fetches the native and ERC-20 token balances for a given Ethereum or Base wallet address
- [Industrial Platform Crypto Stats](https://www.zero.xyz/c/industrial-platform-crypto-stats-05893ba3/llms.txt): $0.001/call via x402. Fetches real-time market statistics for a Coinbase Exchange trading pair (e.g. BTC-USD), including price, volume, and related market data.
- [x402 Gateway Webpage Change Detector](https://www.zero.xyz/c/x402-gateway-webpage-change-detector-54da4667/llms.txt): $0.001/call via x402. Fetches a webpage, computes a deterministic hash of its content, and returns a diff against a previous version to detect meaningful changes in prices, docs, policies, availability, or competitor pages.
- [CDP Wallet Balance Lookup](https://www.zero.xyz/c/cdp-wallet-balance-lookup-feaee9b4/llms.txt): $0.001/call via x402. Returns the ETH and USDC token balances for a given wallet address on Base (eip155:8453) or Ethereum mainnet (eip155:1).
- [JWT Decode](https://www.zero.xyz/c/jwt-decode-ac47c69d/llms.txt): $0.001/call via x402. Decodes a JWT token string and returns its decoded header, payload, and signature components without verification.
- [Text Slugify](https://www.zero.xyz/c/text-slugify-a4ccdd90/llms.txt): $0.001/call via x402. Converts arbitrary text into a URL-safe slug (lowercase, hyphenated, ASCII-normalized)
- [ERC-20 Token Balance Lookup](https://www.zero.xyz/c/erc-20-token-balance-lookup-57bb52d8/llms.txt): $0.001/call via x402. Returns the ERC-20 token balance of a wallet address on Base or Ethereum for a specified token contract.
- [Industrial Platform Web Tools – URL Read & Change Detection](https://www.zero.xyz/c/industrial-platform-web-tools-url-read-change-detection-07473558/llms.txt): $0.001/call via x402. Fetches a webpage at a given URL, extracts its text content, and optionally computes a hash and compares it against a previous hash/text snapshot to detect changes.
- [Timezone Converter (x402 Machine-Payable)](https://www.zero.xyz/c/timezone-converter-x402-machine-payable-aa8f1028/llms.txt): $0.001/call via x402. Converts a datetime from one timezone to another using IANA timezone identifiers, accessible via micropayment-gated x402 protocol.
- [ERC-20 Token Balance Lookup](https://www.zero.xyz/c/erc-20-token-balance-lookup-932aee8e/llms.txt): $0.001/call via x402. Returns the ERC-20 token balance for a given wallet address and contract on Base or Ethereum networks.
- [Industrial Platform Web Tools – Crypto OHLCV](https://www.zero.xyz/c/industrial-platform-web-tools-crypto-ohlcv-56678982/llms.txt): $0.005/call via x402. Returns realtime or historical OHLCV (open/high/low/close/volume) candlestick data for a given cryptocurrency trading pair and time interval
- [Coinbase Exchange Recent Trades Feed](https://www.zero.xyz/c/coinbase-exchange-recent-trades-feed-eed36886/llms.txt): $0.001/call via x402. Fetches the most recent trades for a given Coinbase Exchange trading pair (e.g. BTC-USD), returning trade history with price, size, and side data.
- [Web Monitor – Deterministic Website Change Detection](https://www.zero.xyz/c/web-monitor-deterministic-website-change-detection-c0c13554/llms.txt): $0.005/call via x402. Fetches a webpage, hashes its content (optionally scoped to a CSS selector), and compares against a previous hash to deterministically detect changes.
- [Base64 Decode](https://www.zero.xyz/c/base64-decode-91d0a055/llms.txt): $0.001/call via x402. Decodes a Base64-encoded string back to its original plaintext or binary representation
- [Text Chunking API](https://www.zero.xyz/c/text-chunking-api-a2939e71/llms.txt): $0.001/call via x402. Splits a large text string into overlapping or non-overlapping chunks of a specified size for RAG ingestion and downstream processing
- [HTML to Markdown Converter](https://www.zero.xyz/c/html-to-markdown-converter-85e7f4f6/llms.txt): $0.001/call via x402. Converts raw HTML content into clean Markdown format via a machine-payable x402 POST endpoint
- [HTML Links Extractor](https://www.zero.xyz/c/html-links-extractor-dfe4c2b6/llms.txt): $0.001/call via x402. Extracts all hyperlinks from a raw HTML string, returning structured link data for parsing, crawling, or RAG ingestion.
- [HMAC Signature Generator](https://www.zero.xyz/c/hmac-signature-generator-4d2eb233/llms.txt): $0.001/call via x402. Computes an HMAC signature for a given text and secret key using SHA-256 or SHA-512, delivered as a machine-payable x402 microservice.
- [Industrial Platform Crypto Spot Price](https://www.zero.xyz/c/industrial-platform-crypto-spot-price-b17c728c/llms.txt): $0.001/call via x402. Returns the real-time spot price for a cryptocurrency token or trading pair in a specified quote currency via machine-payable x402 microtransaction.
- [Industrial Platform Web Tools – Crypto Snapshot](https://www.zero.xyz/c/industrial-platform-web-tools-crypto-snapshot-2975b22e/llms.txt): $0.008/call via x402. Returns a real-time market snapshot (trades, OHLCV candles) for a specified cryptocurrency trading pair via Coinbase Exchange data.
- [Industrial Platform Wallet Balance](https://www.zero.xyz/c/industrial-platform-wallet-balance-7603e2de/llms.txt): $0.001/call via x402. Returns ETH and USDC token balances for a given EVM wallet address on Base or Ethereum mainnet
- [Industrial Platform Web Tools – Base64 Encode/Decode](https://www.zero.xyz/c/industrial-platform-web-tools-base64-encode-decode-ba4914ce/llms.txt): $0.001/call via x402. Encodes plain text to Base64 or decodes Base64 back to plain text via a machine-payable x402 HTTP endpoint.
- [Industrial Platform Web Tools – Sitemap URL Extractor](https://www.zero.xyz/c/industrial-platform-web-tools-sitemap-url-extractor-dc2f51fa/llms.txt): $0.001/call via x402. Extracts and returns all URLs listed in a website's sitemap, with optional depth and count limits
- [Industrial Platform Web Tools – Crypto Spot Price](https://www.zero.xyz/c/industrial-platform-web-tools-crypto-spot-price-c4eb8ecc/llms.txt): $0.001/call via x402. Returns real-time spot price data for a Coinbase Exchange trading pair (e.g. BTC-USD, ETH-USD) via a machine-payable x402 microtransaction.
- [Article & Document Extraction to Markdown](https://www.zero.xyz/c/article-document-extraction-to-markdown-68248892/llms.txt): $0.002/call via x402. Fetches a public article or document URL and extracts its main text content, converting it to a clean readable format suitable for RAG ingestion and AI processing.
- [Crypto Order Book Lookup](https://www.zero.xyz/c/crypto-order-book-lookup-ff3912ca/llms.txt): $0.001/call via x402. Returns the real-time order book (bids and asks) for a specified Coinbase Exchange trading pair such as BTC-USD or ETH-USDC.
- [Industrial Platform Web Tools – URL to Markdown Converter](https://www.zero.xyz/c/industrial-platform-web-tools-url-to-markdown-converter-b949b318/llms.txt): $0.001/call via x402. Fetches a public webpage and returns its content as clean Markdown text, suitable for LLM ingestion, RAG pipelines, and document processing.
- [HTML Metadata Extractor](https://www.zero.xyz/c/html-metadata-extractor-bba2c84f/llms.txt): $0.001/call via x402. Extracts metadata (title, description, Open Graph tags, structured data, etc.) from a raw HTML string
- [JSON Schema Validator](https://www.zero.xyz/c/json-schema-validator-4df75879/llms.txt): $0.001/call via x402. Validates a JSON value against a provided JSON Schema definition and returns a pass/fail result.
- [Blockchain Wallet Activity Lookup](https://www.zero.xyz/c/blockchain-wallet-activity-lookup-861ea3a1/llms.txt): $0.002/call via x402. Retrieves recent ERC-20 token transaction activity for a given wallet address on Base or Ethereum networks, defaulting to USDC transfers.
- [Text Diff (Before/After Comparison)](https://www.zero.xyz/c/text-diff-before-after-comparison-3db3ea37/llms.txt): $0.001/call via x402. Computes a deterministic diff between two text strings, returning structured change information for detecting what content was added, removed, or modified.
- [x402 Treasury Snapshot](https://www.zero.xyz/c/x402-treasury-snapshot-dc2ef316/llms.txt): $0.01/call via x402. Returns a deterministic snapshot of an on-chain wallet's token balances, recent ERC-20 activity, and a hash for change detection on Base or Ethereum.
- [x402 Gateway Wallet Monitor](https://www.zero.xyz/c/x402-gateway-wallet-monitor-f5740d96/llms.txt): $0.005/call via x402. Monitors an Ethereum/Base wallet address for token transfer activity and detects state changes relative to a previous snapshot using deterministic hashing.
- [Industrial Platform Web Tools – Gas Price Lookup](https://www.zero.xyz/c/industrial-platform-web-tools-gas-price-lookup-e281e1c7/llms.txt): $0.001/call via x402. Returns current gas price data for a specified EVM-compatible blockchain network (Base or Ethereum mainnet)
- [UUID v4 Generator (x402 Machine-Payable)](https://www.zero.xyz/c/uuid-v4-generator-x402-machine-payable-c6680f1b/llms.txt): $0.001/call via x402. Generates one or more random UUID v4 values via a micropayment-gated POST endpoint using the x402 protocol.
- [Text Statistics Analyzer](https://www.zero.xyz/c/text-statistics-analyzer-3cd9c1ef/llms.txt): $0.001/call via x402. Computes statistical metrics (word count, character count, sentence count, readability scores, etc.) from a submitted text string
- [Industrial Platform Unit Converter](https://www.zero.xyz/c/industrial-platform-unit-converter-678ed453/llms.txt): $0.001/call via x402. Converts a numeric value from one unit to another across length, mass, time, temperature, and digital storage categories via a machine-payable x402 API.
- [ERC-20 Token Allowance Checker](https://www.zero.xyz/c/erc-20-token-allowance-checker-39a3432f/llms.txt): $0.001/call via x402. Queries the current ERC-20 token allowance granted by an owner address to a spender address on a given blockchain network
- [Chain Live Balance Lookup](https://www.zero.xyz/c/chain-live-balance-lookup-0befc5ec/llms.txt): $0.001/call via x402. Fetches the live on-chain token balances for a given Ethereum-compatible wallet address on Base or Ethereum networks.
- [Industrial Platform Web Tools — Wallet Activity Lookup](https://www.zero.xyz/c/industrial-platform-web-tools-wallet-activity-lookup-c23c8e18/llms.txt): $0.001/call via x402. Fetches on-chain wallet activity (transactions/transfers) for a given EVM address on Base or Ethereum, paginated by block cursor.
- [JSON Repair Endpoint](https://www.zero.xyz/c/json-repair-endpoint-2c33d8fe/llms.txt): $0.001/call via x402. Repairs and validates malformed JSON text, returning a corrected, well-formed JSON structure
- [Hex Decode](https://www.zero.xyz/c/hex-decode-b03253a3/llms.txt): $0.001/call via x402. Decodes a hexadecimal-encoded string back into its original plaintext or binary representation
- [DNS Lookup via Industrial Platform Web Tools](https://www.zero.xyz/c/dns-lookup-via-industrial-platform-web-tools-a1baab40/llms.txt): $0.001/call via x402. Performs DNS record lookups for a given hostname, returning records for types like A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, or SRV.
- [Block Number Lookup (Base / Ethereum)](https://www.zero.xyz/c/block-number-lookup-base-ethereum-9a1834a8/llms.txt): $0.001/call via x402. Returns the current block number for a specified blockchain network (Base or Ethereum) via a machine-payable x402 GET request.
- [Chain Native Balance Lookup](https://www.zero.xyz/c/chain-native-balance-lookup-f2d4edac/llms.txt): $0.001/call via x402. Returns the native token balance for a given Ethereum or Base wallet address, payable via x402 micropayment protocol.
- [Base64 Encode](https://www.zero.xyz/c/base64-encode-42dc47c8/llms.txt): $0.001/call via x402. Encodes arbitrary text input into its Base64 representation via a machine-payable HTTP endpoint.
- [Industrial Platform Web Tools – Web Scrape](https://www.zero.xyz/c/industrial-platform-web-tools-web-scrape-ffdd0701/llms.txt): $0.001/call via x402. Fetches and extracts the content of a webpage given its URL, with optional JavaScript rendering, returning structured scraped data.
- [Robots.txt Check for URL](https://www.zero.xyz/c/robots-txt-check-for-url-1adc88eb/llms.txt): $0.001/call via x402. Checks whether a given URL is permitted or blocked by the target website's robots.txt rules before crawling or scraping
- [JSON Canonicalize](https://www.zero.xyz/c/json-canonicalize-f8fa4da6/llms.txt): $0.001/call via x402. Canonicalizes a JSON object into a deterministic, normalized form for consistent checksums and encoding.
- [Web Dossier Extraction & RAG Ingestion](https://www.zero.xyz/c/web-dossier-extraction-rag-ingestion-5a5076f9/llms.txt): $0.008/call via x402. Fetches a URL and returns a structured dossier of its content including full text, metadata, and RAG-ready chunked segments for downstream ingestion
- [Web Links Extractor](https://www.zero.xyz/c/web-links-extractor-3ee7ed4e/llms.txt): $0.001/call via x402. Extracts all hyperlinks from a given webpage URL, with optional filtering by scope (internal/external/all) and count limit.
- [URL Inspector – Industrial Platform Web Tools](https://www.zero.xyz/c/url-inspector-industrial-platform-web-tools-82508979/llms.txt): $0.001/call via x402. Inspects a given URL and returns structured metadata, HTTP headers, redirect chains, and page information for a webpage or document.
- [x402 Transaction Watch](https://www.zero.xyz/c/x402-transaction-watch-439e7315/llms.txt): $0.003/call via x402. Monitors a blockchain transaction by hash and detects state changes, returning a deterministic status snapshot for Base or Ethereum networks.
- [RSS Feed to JSON Converter](https://www.zero.xyz/c/rss-feed-to-json-converter-e0bc3474/llms.txt): $0.001/call via x402. Fetches an RSS feed URL and converts it to structured JSON format for programmatic consumption
- [Industrial Platform Web Tools – Checksum](https://www.zero.xyz/c/industrial-platform-web-tools-checksum-d3ca9b93/llms.txt): $0.001/call via x402. Computes a cryptographic checksum for arbitrary text or binary-encoded data, enabling data integrity verification over the x402 payment protocol.
- [Industrial Platform Web Tools – Transaction Status](https://www.zero.xyz/c/industrial-platform-web-tools-transaction-status-aae59fd7/

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