# Services from flat-rate-llm.kikoribera03.workers.dev on Zero

> flat-rate-llm.kikoribera03.workers.dev serves 66 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/flat-rate-llm.kikoribera03.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/flat-rate-llm.kikoribera03.workers.dev/health.json

## Services

- [ECB Official Currency Converter](https://www.zero.xyz/c/ecb-official-currency-converter-b10bd845/llms.txt): $0.005/call via x402. Converts an amount between two currencies using the European Central Bank's official daily reference rates, optionally for a past date within 90 days.
- [ERC20 Pre-Trade Safety Check](https://www.zero.xyz/c/erc20-pre-trade-safety-check-c92ee773/llms.txt): $0.01/call via x402. Analyzes ERC20 token contracts on major EVM chains for dangerous capabilities (mint, pause, blacklist, upgradeable proxy, mutable taxes) and ownership status using live bytecode and on-chain state.
- [Chain Health Check](https://www.zero.xyz/c/chain-health-check-b0403e4f/llms.txt): $0.005/call via x402. Returns live health status for every supported EVM chain, including chain ID, latest block number, and data staleness in seconds.
- [Solidity Function Selector and Event Topic0 Generator](https://www.zero.xyz/c/solidity-function-selector-and-event-topic0-generator-d730e037/llms.txt): $0.0025/call via x402. Converts a canonical Solidity function or event signature into its 4-byte function selector and 32-byte event topic0 hash.
- [Read Web Page as Markdown](https://www.zero.xyz/c/read-web-page-as-markdown-69dc6fc5/llms.txt): $0.01/call via x402. Fetches a single URL and returns the page content as clean markdown, stripping boilerplate, scripts, and navigation, with optional outbound links.
- [EVM Address Checksum and Validation](https://www.zero.xyz/c/evm-address-checksum-and-validation-49033675/llms.txt): $0.0025/call via x402. Validates an EVM wallet address and returns it in EIP-55 mixed-case checksum form, flagging invalid or mistyped addresses before funds are sent.
- [ASN Lookup](https://www.zero.xyz/c/asn-lookup-3742704a/llms.txt): $0.005/call via x402. Returns authoritative public data about an Autonomous System Number: RDAP registry record, AS name/country/RIR from Team Cymru, and currently announced IPv4/IPv6 prefixes from RIPEstat.
- [Coin Flip (Cryptographically Random)](https://www.zero.xyz/c/coin-flip-cryptographically-random-490237fa/llms.txt): $0.0025/call via x402. Flips one or more fair coins using cryptographic randomness and returns each result (heads/tails) plus a tally of totals.
- [EVM Contract or Wallet Detector](https://www.zero.xyz/c/evm-contract-or-wallet-detector-61994893/llms.txt): $0.005/call via x402. Determines whether an Ethereum address is a smart contract or a plain EOA wallet by checking its bytecode size via eth_getCode
- [Current Weather from Norwegian Meteorological Institute](https://www.zero.xyz/c/current-weather-from-norwegian-meteorological-institute-0bae4843/llms.txt): $0.01/call via x402. Returns real-time weather conditions for any lat/lon point on Earth using the Norwegian Meteorological Institute's official forecast model, including temperature, humidity, wind, pressure, cloud cover, and next-hour precipitation.
- [DEX Token Price from Uniswap V3 (On-Chain)](https://www.zero.xyz/c/dex-token-price-from-uniswap-v3-on-chain-53d9c9ef/llms.txt): $0.005/call via x402. Returns the spot price of any ERC20 token against USDC by reading directly from the deepest Uniswap V3 pool on Base, Ethereum, Polygon, Arbitrum, or Optimism, with full pool metadata for auditability.
- [Dice Roller (Cryptographically Secure)](https://www.zero.xyz/c/dice-roller-cryptographically-secure-39135ecc/llms.txt): $0.0025/call via x402. Rolls any number of dice with any number of faces using CSPRNG with rejection sampling, returning each individual roll and the total.
- [Domain DNS Check](https://www.zero.xyz/c/domain-dns-check-a32a249e/llms.txt): $0.005/call via x402. Returns a comprehensive DNS profile for a single domain including registration status, A/AAAA records, nameservers, MX, SPF, DMARC, DNSSEC, and parked-site detection in one call.
- [Domain Registration Lookup (RDAP)](https://www.zero.xyz/c/domain-registration-lookup-rdap-4c4c0f26/llms.txt): $0.005/call via x402. Returns authoritative RDAP registration data for a domain — including dates, registrar, EPP status, nameservers, DNSSEC, and abuse contact — via IANA bootstrap, no API key required.
- [EIP-1559 Fee Suggestion](https://www.zero.xyz/c/eip-1559-fee-suggestion-828170e3/llms.txt): $0.005/call via x402. Returns suggested maxFeePerGas and maxPriorityFeePerGas at slow, normal, and fast percentiles derived from the last 20 blocks of real fee history, plus the current base fee.
- [ENS Name Resolution](https://www.zero.xyz/c/ens-name-resolution-afba9f56/llms.txt): $0.005/call via x402. Resolves an ENS name (e.g. vitalik.eth) to its Ethereum address, or reverse-resolves an Ethereum address back to its primary ENS name, reading directly from Ethereum mainnet.
- [ERC20 Allowance Checker](https://www.zero.xyz/c/erc20-allowance-checker-deb186d3/llms.txt): $0.005/call via x402. Returns how many tokens a spender is approved to transfer on an ERC20 owner's behalf, including whether the approval is effectively unlimited.
- [ERC20 Token Balance Lookup](https://www.zero.xyz/c/erc20-token-balance-lookup-fe07c0cb/llms.txt): $0.005/call via x402. Returns the raw and formatted token balance for any ERC20 token (USDC, USDT, DAI, etc.) held by a given wallet address on EVM-compatible chains via balanceOf.
- [ERC20 Token Info](https://www.zero.xyz/c/erc20-token-info-9fec76bb/llms.txt): $0.005/call via x402. Returns the name, symbol, decimals, and total supply of any ERC20 token contract in a single call across major EVM chains.
- [EVM Gas Estimator](https://www.zero.xyz/c/evm-gas-estimator-d95e1bf3/llms.txt): $0.005/call via x402. Estimates the gas units and cost for an EVM transaction before signing, detecting reverts without broadcasting.
- [EU VAT Number Validator](https://www.zero.xyz/c/eu-vat-number-validator-ceadf4e6/llms.txt): $0.005/call via x402. Validates a single EU VAT number offline, checking country prefix, format, and check-digit algorithm where available, with explicit indication of whether checksum was verified.
- [EVM Address Nonce](https://www.zero.xyz/c/evm-address-nonce-1d6a3486/llms.txt): $0.005/call via x402. Returns the next transaction nonce and pending nonce for any EVM address, and whether the address is a contract, via eth_getTransactionCount.
- [EVM Block Height](https://www.zero.xyz/c/evm-block-height-bbfd8eb6/llms.txt): $0.005/call via x402. Returns the latest block number, timestamp, and staleness (age in seconds) for any supported EVM chain, useful for checking node sync status.
- [EVM Gas Price](https://www.zero.xyz/c/evm-gas-price-854b2357/llms.txt): $0.005/call via x402. Returns the current gas price and base fee for a supported EVM chain in wei and gwei, plus the estimated cost of a plain ETH transfer.
- [EVM Native Balance](https://www.zero.xyz/c/evm-native-balance-ce33d140/llms.txt): $0.005/call via x402. Returns the native coin balance (ETH, MATIC, etc.) for any EVM address on Base, Ethereum, Polygon, Arbitrum, or Optimism via eth_getBalance.
- [EVM Transaction Lookup by Hash](https://www.zero.xyz/c/evm-transaction-lookup-by-hash-438d85f5/llms.txt): $0.005/call via x402. Fetches merged transaction details and receipt (from, to, value, gas used, status, block) for a given transaction hash on EVM-compatible chains in a single call.
- [Hex Converter](https://www.zero.xyz/c/hex-converter-1c84593a/llms.txt): $0.0025/call via x402. Converts a value between hexadecimal, decimal, and UTF-8 text representations, handling arbitrarily large integers exactly.
- [IBAN Check & Validation](https://www.zero.xyz/c/iban-check-validation-04304d10/llms.txt): $0.005/call via x402. Validates a single IBAN offline, checking country code, length, MOD-97 check digits, SEPA membership, and extracting the BBAN — no network call required.
- [IP Address Intelligence (RDAP + ASN Lookup)](https://www.zero.xyz/c/ip-address-intelligence-rdap-asn-lookup-1ca91a91/llms.txt): $0.005/call via x402. Looks up an IPv4 or IPv6 address to retrieve its registry owner, country, abuse contact via RDAP, and origin ASN from Team Cymru's DNS service — no API key required.
- [IP Blocklist Check (DNSBL)](https://www.zero.xyz/c/ip-blocklist-check-dnsbl-13fc8607/llms.txt): $0.005/call via x402. Checks a single IPv4 address against nine public DNS blocklists simultaneously and returns each list's result code, reason text, and delisting URL.
- [Keccak-256 Hash](https://www.zero.xyz/c/keccak-256-hash-f9d6e3e4/llms.txt): $0.0025/call via x402. Computes the Keccak-256 hash of any string or hex-encoded byte payload — the specific hash function Ethereum uses internally, distinct from SHA3-256.
- [Multi-day Forecast from Norwegian Meteorological Institute](https://www.zero.xyz/c/multi-day-forecast-from-norwegian-meteorological-institute-58656fe6/llms.txt): $0.01/call via x402. Returns a day-by-day weather forecast (min/max temp, precipitation, wind, midday symbol) for any global coordinate, up to 9 days out, sourced from Norway's official meteorological model.
- [OFAC Sanctions Check for Crypto Address](https://www.zero.xyz/c/ofac-sanctions-check-for-crypto-address-5e44e2bb/llms.txt): $0.01/call via x402. Checks a single cryptocurrency address against the OFAC SDN list and returns the exact matching sanctioned entity, its type, and sanctions programmes if found.
- [Password Generator (CSPRNG, Entropy-Rated)](https://www.zero.xyz/c/password-generator-csprng-entropy-rated-68e949fa/llms.txt): $0.0025/call via x402. Generates one or more cryptographically strong random passwords using the platform CSPRNG, with configurable length, alphabet, and entropy-in-bits reporting.
- [Phone Number Check & Normalizer](https://www.zero.xyz/c/phone-number-check-normalizer-3101ee7b/llms.txt): $0.005/call via x402. Validates and normalizes a phone number to E.164 format, determines its country, and checks national number length — entirely offline using libphonenumber data.
- [Random Number Generator (Uniform, No Modulo Bias)](https://www.zero.xyz/c/random-number-generator-uniform-no-modulo-bias-400df870/llms.txt): $0.0025/call via x402. Returns one or more uniform random integers in a specified range, optionally without repeats, using rejection sampling to avoid modulo bias.
- [Raw EVM Contract Call (eth_call)](https://www.zero.xyz/c/raw-evm-contract-call-eth-call-0b502d27/llms.txt): $0.005/call via x402. Executes any read-only Ethereum contract call (eth_call) with raw calldata on five EVM chains and returns the raw hex result, bypassing typed endpoint limitations.
- [Raw Contract Storage Slot Reader](https://www.zero.xyz/c/raw-contract-storage-slot-reader-9db7fcf5/llms.txt): $0.005/call via x402. Reads a raw storage slot of any EVM smart contract and returns the value decoded as hex, unsigned integer, and address.
- [Riddle with Checkable Answer](https://www.zero.xyz/c/riddle-with-checkable-answer-95ddad95/llms.txt): $0.0025/call via x402. Returns a riddle by difficulty in English or Spanish along with its plaintext answer and the SHA-256 hash of the answer, enabling agents to verify guesses without peeking at the solution.
- [SHA-256 Hash](https://www.zero.xyz/c/sha-256-hash-4d839566/llms.txt): $0.0025/call via x402. Computes the SHA-256 hash of any string or hex-encoded byte payload, returning the digest as both hex and base64.
- [Text-to-Speech via MeloTTS](https://www.zero.xyz/c/text-to-speech-via-melotts-01ac5c70/llms.txt): $0.005/call via x402. Converts text (up to 2000 characters) into natural speech audio using MeloTTS, returning a hosted WAV URL and optional base64, in English, Spanish, French, Chinese, Japanese, or Korean.
- [Time Zone Converter](https://www.zero.xyz/c/time-zone-converter-6928a315/llms.txt): $0.0025/call via x402. Converts a wall-clock time from one IANA time zone to another, applying DST rules and warning about ambiguous or non-existent local times.
- [TLS Certificate Lookup via Certificate Transparency](https://www.zero.xyz/c/tls-certificate-lookup-via-certificate-transparency-aad9660e/llms.txt): $0.005/call via x402. Returns all currently valid TLS certificates publicly issued for a domain, read from Certificate Transparency logs, including issuer details, validity windows, days to expiry, revocation status, and covered hostnames.
- [Token Unit Converter (wei/gwei/ether)](https://www.zero.xyz/c/token-unit-converter-wei-gwei-ether-7e12d482/llms.txt): $0.0025/call via x402. Converts cryptocurrency token amounts between wei, gwei, ether, or any custom decimal precision using exact integer arithmetic — no floating-point errors.
- [EVM Transaction Receipt Lookup](https://www.zero.xyz/c/evm-transaction-receipt-lookup-559fbb41/llms.txt): $0.005/call via x402. Returns the receipt of an on-chain transaction: success/revert status, gas used, fee paid in Ether, and number of logs emitted, via eth_getTransactionReceipt.
- [Two-Sentence Horror Story Generator](https://www.zero.xyz/c/two-sentence-horror-story-generator-5f324d6e/llms.txt): $0.0025/call via x402. Generates a two-sentence horror story in English or Spanish by theme (domestic, technological, cosmic, or folk), returned split into setup and payoff plus joined, with deduplication support via IDs and reproducibility via seed.
- [URL Status and Redirect Chain Checker](https://www.zero.xyz/c/url-status-and-redirect-chain-checker-caf5c836/llms.txt): $0.005/call via x402. Checks a URL's HTTP status code, full redirect chain with per-hop codes, final URL, HTTPS enforcement, content type/size, and security headers — without downloading the page body.
- [UUID v4 Generator](https://www.zero.xyz/c/uuid-v4-generator-18f8b227/llms.txt): $0.0025/call via x402. Generates 1–100 cryptographically random UUID v4s per call using the platform CSPRNG, suitable for idempotency keys, request IDs, and correlation IDs.
- [Verify Wallet Signature (EIP-191 / personal_sign)](https://www.zero.xyz/c/verify-wallet-signature-eip-191-personal-sign-8e02257c/llms.txt): $0.0025/call via x402. Recovers the Ethereum address that produced a personal_sign (EIP-191) signature and checks whether it matches an expected address, proving wallet ownership.
- [Wallet Token Portfolio](https://www.zero.xyz/c/wallet-token-portfolio-3390be84/llms.txt): $0.005/call via x402. Fetches native ETH balance plus balances of specified ERC20 tokens for a wallet address on a single EVM chain, with symbols and decimals already applied, in one API call.
- [Word of the Day (English/Spanish, Date-Deterministic)](https://www.zero.xyz/c/word-of-the-day-english-spanish-date-deterministic-b99feb5a/llms.txt): $0.0025/call via x402. Returns the word of the day — its definition, part of speech, and example sentence — in English or Spanish, chosen deterministically from the UTC date so the same word is returned for any given day worldwide.
- [Email Address Validator](https://www.zero.xyz/c/email-address-validator-74562901/llms.txt): $0.005/call via x402. Validates an email address by checking syntax, MX records, SPF/DMARC policies, disposability, domain resolution, and role-account detection
- [NFT Owner and Metadata Lookup](https://www.zero.xyz/c/nft-owner-and-metadata-lookup-6cb3f77b/llms.txt): $0.005/call via x402. Returns the current owner address, tokenURI, and collection name for a given ERC721 token ID via on-chain eth_call, no indexer or API key required.
- [Base64 Encode and Decode](https://www.zero.xyz/c/base64-encode-and-decode-b0eea2e5/llms.txt): $0.0025/call via x402. Encodes or decodes strings using Base64 (standard or URL-safe alphabet) with proper UTF-8 h

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