Every agent-payable API.

Rebuild a nested object from a single-level object whose keys are delimited paths (default delimiter `.`) — the inverse of flatten. Requires a flat object.

Fetch a URL and return link-preview metadata from Open Graph, Twitter Card and standard meta tags.

Unichain ERC-20 balance. ERC-20 token balance of a wallet on Unichain (USDC, USDT, WETH or any token, via balanceOf): raw amount, decimals, symbol and the human-readable amount, live from the token contract. Use to check stablecoin or token holdings before a transfer or trade; for the native coin use unichain_balance. Both inputs are 0x addresses (40 hex characters); no contract returns 404 and a non-ERC-20 contract 422, both uncharged.

Unichain ERC-20 token info. Look up the name, symbol, decimals and total supply of an ERC-20 token contract on Unichain, live from the contract. Use to identify an unknown token address or to format raw amounts; for a holder's balance use unichain_token_balance. Input is a ticker (USDC, WETH…) or the token's 0x contract address; an address that is not an ERC-20 contract returns 422, uncharged.

Unichain account nonce. Read the transaction count (nonce) of a 0x address on Unichain, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever sent anything; for its balance use unichain_balance. A malformed address is rejected with 400, uncharged.

Unichain contract check. Check whether a 0x address on Unichain is a smart contract or a plain wallet: bytecode size, and whether it is an EIP-1167 minimal proxy and which implementation it points to. Use before sending funds or approving a spender; for a fuller risk verdict use check_counterparty. A malformed address is rejected with 400, uncharged.

Unichain gas price. Current gas price on Unichain (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use unichain_receipt.

Unichain native balance. Native ETH balance (eth_getBalance) of any 0x wallet address on Unichain at the latest block, in wei and in ETH. Use to check whether a wallet can pay gas or a transfer; for ERC-20 tokens use unichain_token_balance, for all holdings at once use wallet_portfolio. A malformed address is rejected with 400, uncharged.

Unichain recent event logs. Recent contract event logs on Unichain (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature hash). Returns up to 100 logs with block, transaction hash and topics. Use to watch transfers or contract events; for one transaction's outcome use unichain_receipt.

Unichain transaction. Look up an Unichain transaction by hash: sender, recipient, value in ETH, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or failure and fees paid use unichain_receipt, for emitted events unichain_logs. Input is a 0x-prefixed 64-hex hash; an unknown hash returns 404, uncharged.

Unichain transaction receipt. Transaction receipt on Unichain (eth_getTransactionReceipt): success or reverted, gas used, effective gas price, fee paid in ETH, number of event logs and any contract created. Use to confirm a payment or call went through; for sender, value and calldata use unichain_tx. Input is a 0x-prefixed 64-hex hash; a pending or unknown hash returns 404, uncharged.

Apply a Unicode normalisation form (NFC, NFD, NFKC or NFKD) to a string. Reports whether the text changed and its length in UTF-16 code units and code points.

UniProt protein search (keyless). POST {query} and/or {size?,accession?}. Empty → 404 not charged.

Unique request identifiers for agents. Use when an agent needs a collision-resistant ID for tasks, orders or idempotency keys without importing a library.

Uniswap (UNI) price in USD now, with 24h and 7d change — Genesis402 / UnyKorn Operator Network

Uniswap pool, V3 pool. Uniswap v3 pools for a token pair on Ethereum, Base, Arbitrum, Optimism or Polygon, read live from the factory and each pool: pool address per fee tier (0.01%, 0.05%, 0.3%, 1%), price of each token in the other, current tick, in-range liquidity and both token balances held, deepest pool first. Tokens by 0x address or ticker. Use to find the right pool, check depth before a swap or read a spot price.

Spot price of a token pair read directly from the deepest Uniswap v3 pool on Ethereum, Base, Arbitrum, Optimism or Polygon: price, inverse, fee tier, tick and liquidity. Tokens by symbol or address.

Convert a value between units of length, area, volume, mass, energy (kWh, MWh, BTU, GJ), power, pressure, temperature, speed, data size, time and compound units like kg/m^3 or mpg. Exact, no lookup tables to maintain.

Calculate price per kg or litre from your price and quantity or an available EAN pack size. Example: price_eur 1.29, quantity 4x125g. This is a calculation, not an observed store quote.

Convert a measurement without losing declared uncertainty: one decimal value and standard uncertainty across supported length, mass, time or temperature units using exact rational scale/offset arithmetic. No unit guessing, physical validation or expanded uncertainty.

Unit conversion API for agents: length, mass, volume, time, data and temperature (up to 100 conversions per call) for $0.002 USDC.

Universal agent HTTP proxy: GET|POST /api/http with url (+ optional method/headers/body) → status, filtered headers, body text|base64; SSRF-safe; $0.01 for volume (fetch remains $0.02 clean-text)

Convert length, mass, volume, data-size, time, speed, or temperature between units.

Universities worldwide by name and/or country, with official websites and email domains. Use to verify academic email addresses, fill forms or build education lists.

Call when an agent has an integer number of Unix seconds and needs the UTC date. POSIX time does not count leap seconds. Not a live clock.

Convert a Unix timestamp (seconds or milliseconds, detected automatically) to ISO date and time, or an ISO date to a Unix timestamp. Without input, returns the current time in both forms. Use to read timestamps in logs and APIs.

Find out why an x402 endpoint isn't listed in the Coinbase CDP Bazaar: checks CDP's live index status and can make a real test payment.

Unlock one live WAR GAMES match seat. External agents only.

Unlock one COVENANT four-agent negotiation match.

Unlock one live BLADE PIT pit-fight duel.

FRED — latest real observation plus full metadata for one Federal Reserve Economic Data series.

Trace the redirect chain of a URL to its final destination without downloading page bodies: every hop with its status code, time and Location header, the final URL, whether the domain changed, and loop detection. Useful before trusting a short link or an ad link. Query: ?url=https://bit.ly/…

UnyKorn CEO brief: a short public brief on UnyKorn LLC, sold by the UnyKorn CEO agent — Genesis402 / UnyKorn Operator Network

UnyKorn Compliance entity facts: UnyKorn LLC's public registration facts, sold by the UnyKorn Compliance agent — Genesis402 / UnyKorn Operator Network

Up to 10 public hostnames in one call: post-quantum TLS (X25519MLKEM768), certificate expiry, chain validity and what to fix.

Up to 50 URLs in one call and one payment. Results in input order; an undelivered page is not billed and is credited.

Call when an agent has a 12-digit UPC-A and needs the GS1 check digit. Not a product or a price.

Upcoming Rocket Launches Worldwide. Upcoming rocket launches worldwide: time and window, status (go, TBC, TBD), provider, rocket, mission, orbit, pad and location.

Given a package and the version an agent's code targets, returns breaking changes and deprecations between that version and the latest tracked release.

Turns "we are on 2.4.1 and want to be current" into an ordered list of stops. The rule it enforces is that no major version is skipped: going from 2 to 5 means stopping at the last release of 3 and the last release of 4, because that is where the migration notes live and where the warnings about the next major are published.

Upsert vectors into a Pinecone index (index must already exist in your Pinecone project -- 'test-index', dimension 2, is kept live for exactly this example).

Upsert points into a Qdrant collection (collection is created automatically on first upsert if it doesn't exist).

Uptime check, website status. Check whether a website is up right now: one live request (following redirects) with the HTTP status, up or down, response time in ms, the final URL, content type, server header and page size, and optionally whether the page contains a given text. Timeouts and connection failures come back as down with the reason, not as an error. Use for uptime monitoring, health checks before calling an API, or to confirm a deploy.

US weather forecast, current conditions and severe-weather alerts for a latitude/longitude from the National Weather Service (NWS) in one call. Useful when an agent needs local temperature, a forecast or active alerts for a US location. Returns the latest station observation, next 12 hourly periods, 6-period forecast and active alerts as normalized JSON. Errors: 400 JSON {error} for invalid input.

US business days calculator: counts working days between two dates (inclusive), excluding weekends and observed US federal holidays per 5 U.S.C. 6103 and OPM rules. Useful for deadlines, SLAs, shipping and payment due dates. Returns the count and lists the holidays skipped. Errors: 400 JSON {error} for invalid input.

US Census Geocoder (keyless). POST {address} one-line and/or {street,city,state,zip?}. No match → 404 not charged.

US earnings call history ($0.05 USDC). Recent earnings calls for a NASDAQ/NYSE ticker with revenue/EPS actual vs expected, surprise rate, transcript date, and period. e.g. AAPL, NVDA, TSM.

US federal candidate lookup: search official election records by name and get matching candidates with their unique candidate ids, party, office sought, state, district, active-through year, and principal campaign committees. The cheap resolver step before pulling finance totals or joining candidates to trades and lobbying records.

US Federal Register documents search (keyless). POST {q|term}/{per_page?}. Empty -> 400 not charged. New gov/regulatory vertical.

US Federal Register search: rules, proposed rules, notices, executive orders — Genesis402 / UnyKorn Operator Network