# Services from twin.unykorn.org on Zero

> twin.unykorn.org serves 365 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/twin.unykorn.org
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/twin.unykorn.org/health.json

## Services

- [Multi-Chain EVM Balance Reader (Native + ERC20, Up to 5 Chains)](https://www.zero.xyz/c/multi-chain-evm-balance-reader-native-erc20-up-to-5-chains-2410fae5/llms.txt): $0.008/call via x402. Fetches native coin and ERC20 token balances for an EVM address across up to 5 chains in a single call
- [UnyKorn Genesis402 Counterparty Compliance Report](https://www.zero.xyz/c/unykorn-genesis402-counterparty-compliance-report-c51cb1b1/llms.txt): $0.25/call via x402. Returns a sanctions and compliance screening report for a company or individual, including registered parent entities, against UN, OFAC, EU, and UK sanctions lists, with a signed and verifiable result.
- [Active US Weather Alerts by State (NWS)](https://www.zero.xyz/c/active-us-weather-alerts-by-state-nws-3081a9bf/llms.txt): $0.002/call via x402. Returns active National Weather Service weather alerts (warnings, watches, advisories) for a given US state
- [Air Quality Now: US AQI, PM2.5, PM10, Ozone, NO2, UV Index](https://www.zero.xyz/c/air-quality-now-us-aqi-pm2-5-pm10-ozone-no2-uv-index-2358ef78/llms.txt): $0.001/call via x402. Returns real-time US Air Quality Index (AQI) with health band, PM2.5, PM10, ozone, NO2, and UV index for a given location by coordinates or place name.
- [Document Q&A with Verified Supporting Quote](https://www.zero.xyz/c/document-q-a-with-verified-supporting-quote-d74aeefa/llms.txt): $0.006/call via x402. Answers a question based on a provided document and returns a verified supporting quote from that document as evidence
- [arXiv Paper Search](https://www.zero.xyz/c/arxiv-paper-search-8bea8b27/llms.txt): $0.003/call via x402. Searches arXiv for academic papers by query, returning titles, authors, abstracts, and PDF links sorted by relevance or recency
- [DeFi Yield Pool Screener](https://www.zero.xyz/c/defi-yield-pool-screener-a29aec8c/llms.txt): $0.01/call via x402. Filters and ranks 15,000+ DeFi liquidity pools by APY or TVL across chains, protocols, tokens, and stablecoin status
- [Bitcoin HASH160 (RIPEMD-160 of SHA-256)](https://www.zero.xyz/c/bitcoin-hash160-ripemd-160-of-sha-256-bec19672/llms.txt): $0.001/call via x402. Computes the Bitcoin HASH160 hash of an input — applies SHA-256 then RIPEMD-160 — accepting either a hex-encoded byte string or raw text.
- [EVM Block Header by Number with Age and Gas Utilisation](https://www.zero.xyz/c/evm-block-header-by-number-with-age-and-gas-utilisation-cf6ee46c/llms.txt): $0.003/call via x402. Returns a parsed EVM block header for a given block number and chain, including computed block age and gas utilisation percentage.
- [Open Library Book Search](https://www.zero.xyz/c/open-library-book-search-c3163cef/llms.txt): $0.002/call via x402. Searches the Open Library catalog for books by title, author, or keyword, returning titles, authors, first publication dates, and ISBNs
- [Canonical Digests — SHA-256, SHA-512/256 and BLAKE2b](https://www.zero.xyz/c/canonical-digests-sha-256-sha-512-256-and-blake2b-eddb6bcd/llms.txt): $0.003/call via x402. Computes SHA-256, SHA-512/256, and BLAKE2b-512 hashes of a text string or canonical JSON object using a deterministic canonicalization scheme.
- [Text Classification with Custom Labels (Single or Multi-Label)](https://www.zero.xyz/c/text-classification-with-custom-labels-single-or-multi-label-cda08022/llms.txt): $0.004/call via x402. Classifies arbitrary text into user-defined labels with confidence scores and reasoning, supporting both single-label and multi-label classification modes.
- [SEC XBRL Company Financials Lookup](https://www.zero.xyz/c/sec-xbrl-company-financials-lookup-0dc6a835/llms.txt): $0.01/call via x402. Retrieves key financial metrics (revenue, net income, assets, liabilities, equity, cash, EPS) for a public company from SEC XBRL filings, identified by ticker or CIK.
- [Country Facts Lookup (Capital, Currencies, Languages, Population, Timezones, Calling Code)](https://www.zero.xyz/c/country-facts-lookup-capital-currencies-languages-population-7d4475e3/llms.txt): $0.001/call via x402. Returns key country facts — capital city, currencies, official languages, population, timezones, and calling code — for any country identified by ISO code or name.
- [ECB Reference Rate Currency Converter](https://www.zero.xyz/c/ecb-reference-rate-currency-converter-72c60456/llms.txt): $0.001/call via x402. Converts a monetary amount between two currencies using the European Central Bank reference rate for today or a specified past date
- [EVM Gas Price Lookup — UnyKorn / Genesis402](https://www.zero.xyz/c/evm-gas-price-lookup-unykorn-genesis402-d6acc0a3/llms.txt): $0.002/call via x402. Returns the current gas price for any of ten supported EVM-compatible blockchain networks
- [ERC20 Token USD Price Lookup](https://www.zero.xyz/c/erc20-token-usd-price-lookup-533cebf2/llms.txt): $0.004/call via x402. Returns the current USD price of an ERC20 token given its contract address and chain
- [Current Weather Now (Lat/Lon or Place Name)](https://www.zero.xyz/c/current-weather-now-lat-lon-or-place-name-7a3ff422/llms.txt): $0.001/call via x402. Returns real-time weather conditions for any location including temperature, feels-like, wind speed/direction, precipitation, and overall conditions.
- [Daily Weather Forecast (Up to 16 Days) – UnyKorn](https://www.zero.xyz/c/daily-weather-forecast-up-to-16-days-unykorn-58b0e7ca/llms.txt): $0.002/call via x402. Returns a daily weather forecast for up to 16 days for a given location, including high/low temperatures, precipitation chance, wind, UV index, and sunrise/sunset times.
- [ERC165 Interface Support Checker](https://www.zero.xyz/c/erc165-interface-support-checker-488a6999/llms.txt): $0.003/call via x402. Checks whether a smart contract on a given EVM chain declares support for a specific ERC165 interface ID
- [EIP-2612 Permit Nonce Lookup](https://www.zero.xyz/c/eip-2612-permit-nonce-lookup-25c940bf/llms.txt): $0.002/call via x402. Returns the current EIP-2612 permit nonce for a given ERC-20 token owner address on a specified EVM chain
- [Email & Domain Deliverability Check (MX, SPF, DMARC, Provider, Disposable Flag)](https://www.zero.xyz/c/email-domain-deliverability-check-mx-spf-dmarc-provider-disposable-flag-e728eac8/llms.txt): $0.002/call via x402. Checks an email address or domain for deliverability signals including MX records, email provider, SPF policy, DMARC policy, and whether the domain is disposable/temporary.
- [ERC1155 Balance for One Owner and Token ID](https://www.zero.xyz/c/erc1155-balance-for-one-owner-and-token-id-64ece068/llms.txt): $0.003/call via x402. Returns the balance of a specific ERC1155 token ID held by a given owner address on a supported EVM chain
- [ERC20 Token Balance for One Holder](https://www.zero.xyz/c/erc20-token-balance-for-one-holder-9917d044/llms.txt): $0.003/call via x402. Returns the ERC20 token balance of a specific wallet address for a given token contract on a supported EVM chain
- [Ethereum Keccak256 Hash (Original Keccak, not NIST SHA3)](https://www.zero.xyz/c/ethereum-keccak256-hash-original-keccak-not-nist-sha3-bdfb4dab/llms.txt): $0.001/call via x402. Computes the Ethereum-native Keccak256 hash (the original Keccak algorithm, not NIST SHA3) of a hex-encoded byte sequence or plain text string
- [EVM Event Logs by Contract, Topic, and Block Range](https://www.zero.xyz/c/evm-event-logs-by-contract-topic-and-block-range-d483d21c/llms.txt): $0.006/call via x402. Retrieves on-chain event logs filtered by smart contract address, topic hash, and block range across 10 EVM-compatible chains.
- [EVM Block Receipts — All Transaction Receipts in One Block](https://www.zero.xyz/c/evm-block-receipts-all-transaction-receipts-in-one-block-1577abca/llms.txt): $0.006/call via x402. Fetches every transaction receipt in a specified EVM block in a single API call, across ten supported chains.
- [EVM Contract Introspection](https://www.zero.xyz/c/evm-contract-introspection-b16170b1/llms.txt): $0.005/call via x402. Inspects an EVM contract address to determine if it is a contract, whether it is a proxy, and whether it is a token, returning full metadata.
- [EVM Transaction + Receipt + Decoded ERC20 Transfers](https://www.zero.xyz/c/evm-transaction-receipt-decoded-erc20-transfers-cfb8c0ab/llms.txt): $0.006/call via x402. Fetches an EVM transaction, its receipt, and decoded ERC20 token transfers in a single API call across multiple EVM chains.
- [Code Explainer: Summary, Steps, I/O, Risks & Complexity](https://www.zero.xyz/c/code-explainer-summary-steps-i-o-risks-complexity-ba9c044f/llms.txt): $0.006/call via x402. Analyzes a code snippet and returns a plain-English explanation covering its summary, step-by-step logic, inputs/outputs, visible risks, and complexity assessment.
- [Extract Structured JSON from Text Using Custom Field List](https://www.zero.xyz/c/extract-structured-json-from-text-using-custom-field-list-1e480b05/llms.txt): $0.006/call via x402. Takes arbitrary text (invoices, emails, contracts, listings) and a user-defined field map, returning structured JSON with the requested fields extracted.
- [FDA Drug Label Lookup](https://www.zero.xyz/c/fda-drug-label-lookup-604494fe/llms.txt): $0.003/call via x402. Retrieves official FDA drug label information including indications, dosage, warnings, boxed warnings, and contraindications for a given drug
- [FDA Recalls and Enforcement Reports](https://www.zero.xyz/c/fda-recalls-and-enforcement-reports-d23947d8/llms.txt): $0.003/call via x402. Retrieves FDA recall and enforcement report records for food, drugs, or medical devices, optionally filtered by keyword.
- [DeFi Protocol Search by Name or Token Symbol](https://www.zero.xyz/c/defi-protocol-search-by-name-or-token-symbol-96fb3882/llms.txt): $0.002/call via x402. Searches a DefiLlama index of 6,000+ DeFi protocols by name or token symbol, returning matching protocol records.
- [Foreign-Exchange Reference Rates (ECB) – 30+ Currencies](https://www.zero.xyz/c/foreign-exchange-reference-rates-ecb-30-currencies-02411ab5/llms.txt): $0.001/call via x402. Returns ECB foreign-exchange reference rates for 30+ currencies, optionally filtered by base currency and target symbols.
- [AI Regex Generator and Tester](https://www.zero.xyz/c/ai-regex-generator-and-tester-3d8bb4a5/llms.txt): $0.005/call via x402. Generates a regular expression from a plain-language description and validates it against user-supplied match/no-match examples
- [Global Sanctions Name Screening](https://www.zero.xyz/c/global-sanctions-name-screening-9a5b8704/llms.txt): $0.02/call via x402. Screens a person, organisation, vessel, or aircraft name against the UN, US OFAC SDN, EU, and UK sanctions lists
- [ERC-721 isApprovedForAll Check](https://www.zero.xyz/c/erc-721-isapprovedforall-check-305dd0f4/llms.txt): $0.003/call via x402. Checks whether an owner has granted an operator full approval over their entire ERC-721 NFT collection on a specified EVM chain
- [ERC-721 NFT Balance Checker](https://www.zero.xyz/c/erc-721-nft-balance-checker-566a55a8/llms.txt): $0.003/call via x402. Returns how many NFTs from a specific ERC-721 collection a given wallet address holds on a specified EVM-compatible chain
- [ERC-20 Allowance Lookup](https://www.zero.xyz/c/erc-20-allowance-lookup-bb3bb2ae/llms.txt): $0.003/call via x402. Returns how much a spender address is approved to transfer from an owner's ERC-20 token balance on a given EVM chain
- [Business Day Checker with Weekend & Public Holiday Validation](https://www.zero.xyz/c/business-day-checker-with-weekend-public-holiday-validation-480a6c0a/llms.txt): $0.001/call via x402. Checks whether a given date is a business day for a specified country (accounting for weekends and public holidays) and returns the next valid business day
- [EVM Address Type Checker (Contract vs EOA)](https://www.zero.xyz/c/evm-address-type-checker-contract-vs-eoa-551d085e/llms.txt): $0.002/call via x402. Determines whether an Ethereum-compatible address is a smart contract or an externally-owned account (EOA) on a specified EVM chain and block
- [Solana Rent-Exempt Lamport Calculator](https://www.zero.xyz/c/solana-rent-exempt-lamport-calculator-cbcbe3c9/llms.txt): $0.002/call via x402. Calculates the minimum number of lamports required to make a Solana account rent-exempt given its data size in bytes
- [Merkle-Patricia State Proof for EVM Account and Storage Slot](https://www.zero.xyz/c/merkle-patricia-state-proof-for-evm-account-and-storage-slot-8feed360/llms.txt): $0.006/call via x402. Returns a cryptographic Merkle-Patricia trie proof for an EVM account's state and an optional storage slot on supported EVM chains
- [Named-Entity Extraction: People, Orgs, Places, Products, Dates, Money, Tickers](https://www.zero.xyz/c/named-entity-extraction-people-orgs-places-products-dates-money-tickers-e9677287/llms.txt): $0.004/call via x402. Extracts named entities (people, organizations, places, products, dates, monetary values, and stock tickers) from up to 16,000 characters of input text.
- [EVM Token Info (Name, Symbol, Decimals, Supply)](https://www.zero.xyz/c/evm-token-info-name-symbol-decimals-supply-625682a4/llms.txt): $0.005/call via x402. Returns the name, symbol, decimals, and total supply of an ERC-20 token contract on a supported EVM chain in a single call.
- [EVM Native Coin Balance Lookup](https://www.zero.xyz/c/evm-native-coin-balance-lookup-43fc7693/llms.txt): $0.002/call via x402. Returns the native coin balance (ETH, MATIC, BNB, etc.) for a given wallet address on any of ten supported EVM-compatible blockchains.
- [Natural Language to SQL Translator (Schema-Aware, Read-Only Flagged)](https://www.zero.xyz/c/natural-language-to-sql-translator-schema-aware-read-only-flagged-466621dd/llms.txt): $0.01/call via x402. Converts a natural language question into a SQL query tailored to a user-supplied schema, supporting Postgres, MySQL, SQLite, and BigQuery dialects, with read-only safety flagging.
- [npm Package Facts Lookup](https://www.zero.xyz/c/npm-package-facts-lookup-42fe09be/llms.txt): $0.002/call via x402. Returns key npm package metadata including latest version, license, weekly downloads, dependencies, TypeScript types availability, and deprecation status
- [OpenAlex Scholarly Search: Works with Citations and Open-Access Links](https://www.zero.xyz/c/openalex-scholarly-search-works-with-citations-and-open-access-links-8c3d9e1b/llms.txt): $0.003/call via x402. Searches the OpenAlex academic database for scholarly works, returning citation metadata and open-access links ranked by relevance or citation count.
- [Public Holidays by Country and Year](https://www.zero.xyz/c/public-holidays-by-country

… (truncated at 16384 bytes)