Every agent-payable API.

Ethereum Keccak-256 hex digest of input — original Keccak (0x01 padding), not NIST SHA3-256. Used for EVM checksums, event topics and Solidity keccak256.

Ethereum keccak256 — the original Keccak, not NIST SHA3 — Genesis402 / UnyKorn Operator Network

Ethereum Name Service (ENS) price in USD now, with 24h and 7d change — Genesis402 / UnyKorn Operator Network

EU B2C e-commerce VAT: where a distance sale is taxed and how much. Applies the €10,000/year OSS threshold — at/below → seller-country VAT (domestic); above → consumer-country VAT via OSS. IOSS for imports ≤ €150. ?sellerCountry=&buyerCountry=&amount= (+ ytdCrossBorder, category). Returns scheme, taxationPlace, applicableCountry, vatRate, vatAmount. Calculation aid; OSS/IOSS registration and filing are the seller's responsibility.

EU market brief — 4 European equity indices (price + % change), the ECB's daily reference rates for USD, GBP, CHF, JPY and CNY, and the latest ECB press releases, speeches and interviews. No inputs, one call.

Europe 500 MB: a prepaid travel eSIM with 500 MB of data for 1 day. Buy it when a traveller needs mobile data abroad without a local SIM card or roaming fees. Pay in USDC on Base with x402, no account or API key needed. The installable eSIM (QR code, LPA activation code, one-tap iPhone and Android links) is ready within seconds from order_status_url. Optional JSON body: quantity (1 to 20) and email.

Convert a date-time from Europe/London to Europe/Madrid: send 'now' or a local date-time in Europe/London, get the same instant in Europe/Madrid with both UTC offsets, whether daylight saving applies on each side, the hour difference and the ISO/UTC instant. Meeting scheduling without off-by-an-hour mistakes. $0.01 per call.

Europe regional macro + geopolitical stress pulse (no params)

Queries OpenStreetMap for charging stations within a radius of a point and returns each with its position, distance, operator, network, connector types with their individual power ratings and socket counts, access restrictions, fee status, opening hours and whether authentication is required. Results are sorted nearest first and can be filtered to a minimum power or a required connector type, which is the question a vehicle actually has.

Evaluate an Apify actor before you use it. Send one actor ID (for example apify/instagram-scraper) and get an evidence-backed quality report: 23 built-in criteria like reliability, 30-day failure rate, advertised-field truth, and cost per usable item, deep-scan criteria measured from live funded runs, or your own rubric in plain English. Use it to audit a scraper, compare actor quality, or pick the best actor. Returns JSON with per-criterion scores, evidence, and a verdict.

Evaluate data age against a caller-supplied freshness objective. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and produ…

Evaluate a mathematical expression with optional named variables — arithmetic, comparison and logic operators plus functions like sqrt, abs, min, max, sin, cos, log, floor, round, etc. A syntax error, an undefined variable, or a non-finite result is a clean 400. The factorial operator is disabled for safety.

Evaluate a proposed action, claim, policy, relation, or artifact before commitment. Returns a privacy-preserving structural judgment and receipt; it does not modify Root Logos or grant authority.

Generate a list of even numbers up to a specified limit.

Event topic0 from a Solidity event signature — Genesis402 / UnyKorn Operator Network

The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Raw protocol event feed, newest first.

Korean corporate disclosure (DART) event stream, cursor-based delta. All filings, classified with importance score.

FDA drug-approval catalyst change stream for US-listed biotechs: every state change of every catalyst we track — each PDUFA date as it is set, extended and resolved — with the real outcome (approval, or CRL/rejection), the SEC filing quote and its EDGAR source. A superset of the upcoming calendar, as a since-cursor delta feed. Date accuracy AND our coverage of the FDA universe are both published free and unflattered at GET /v1/accuracy — audit before you pay.

Events Checklist builder: Turn supplied steps into a numbered checklist. Tailored for events workflows.

Events Meeting agenda builder: Allocate a meeting duration across supplied topics. Tailored for events workflows.

Events Simple project planner: Distribute a short task list across available days. Tailored for events workflows.

Events Weekday counter: Count weekdays between two dates, inclusive. Tailored for events workflows.

Events Weighted decision matrix: Score options against weighted criteria. Tailored for events workflows.

Every spendable UTXO at a Bitcoin address — Genesis402 / UnyKorn Operator Network

Every transaction receipt in one block, in one call — Genesis402 / UnyKorn Operator Network

Every trustline on an XRPL account — Genesis402 / UnyKorn Operator Network

Everything free by Hablot Knight Browne: the 43 catalogued public-domain books, audiobooks and texts credited to Hablot Knight Browne across Project Gutenberg, LibriVox and Internet Archive, most popular first, each with direct download links. Add words to narrow by title. Re-verified daily. $0.01 per page of 20.

Everything to vet a domain in one call: DNS records + email posture, RDAP registration/age/registrar, IP network/ASN/geo (from the resolved A record) and public threat-intel on the site. Four AgentBIT tools, merged. $0.015.

Eve’s paper next-open record on NVDA, QQQ, and SPY. $50 USDC. Scoreboard only. The method is not included. Not advice. Not affiliated with Robinhood.

Eve’s RWA print: which official number is the actual (T-bill, gold, NAV). Call for official prints, not casino coins.

Select the least-cost verification provider set that satisfies coverage, confidence, independence, and budget policy.

Check up to ten declared claim-evidence relationships against a finite, versioned rule set. Reports unsupported frame transfers and missing information. Unknown combinations remain unresolved. No prose interpretation, source inspection or truth certification.

Live Bitcoin BTC-USD market-regime and risk evidence for autonomous AI agents, algorithmic systems, portfolio monitors, and quantitative workflows. Returns current market state and phase, coherence, commitment, pressure, derived directional bias, alert label, completion readiness, transition strength, false-breakout risk, and recent state-change events. Experimental analytics only; not financial advice.

Everything cheap that is knowable about an address, in one call — Genesis402 / UnyKorn Operator Network

EVM Block (ethereum). Ethereum block by number or latest: hash, time, tx count and first 100 tx hashes, gas used/limit, base fee, miner.

Block header by number, with age and gas utilisation worked out — Genesis402 / UnyKorn Operator Network

Is this address a contract or an externally-owned account — Genesis402 / UnyKorn Operator Network

EVM contract introspection — is it a contract, is it a proxy, is it a token — Genesis402 / UnyKorn Operator Network

Estimate the gas a transaction would use, before signing it — Genesis402 / UnyKorn Operator Network

Event logs filtered by contract, topic and block range — Genesis402 / UnyKorn Operator Network

Which of ten EVM chains has this address ever touched — Genesis402 / UnyKorn Operator Network

Native coin balance for one address, on any of ten EVM chains — Genesis402 / UnyKorn Operator Network

Merkle-Patricia state proof for an account and optional storage slot — Genesis402 / UnyKorn Operator Network

Name, symbol, decimals and supply of a token in one call — Genesis402 / UnyKorn Operator Network

EVM transaction + receipt + decoded ERC20 transfers in ONE call — Genesis402 / UnyKorn Operator Network

Exa's own page index, read per call — no Exa account, no subscription. Pass urls= (one, or up to 5 comma-separated) and get each page as clean text with title, author and publish date. Answers from Exa's crawl rather than our fetcher, so it reads pages a plain server-side GET is blocked from. maxChars=500..40000 (default 8000). One URL is $0.002; a batch of 2-5 is $0.008, which the 402 challenge quotes. Pairs with exa-search: search, then read the winners.

Exa's neural web search, resold per call — no Exa account, no subscription, one USDC micro-payment. Pass query= and get ranked results: title, URL, publish date, author, relevance score. numResults=1..10 (default 5). type=auto|fast|instant. includeDomains= restricts the search. Add text=1 for matched highlights from each page (caps results at 5, priced $0.03; the 402 challenge quotes it). For agents that need what the web says today, not what a training cutoff remembers.

Ask a question and get a written answer with the sources it was drawn from. Exa searches its index, reads the pages and composes the answer, returning the citation list (title, URL, published date) alongside it so every claim can be checked. Model-backed: the answer text is generated, the citations are retrieved.

Neural (embedding-based) web search over Exa's curated index, which finds pages by meaning rather than keyword overlap. Use it when a keyword engine returns the wrong thing: conceptual questions, 'pages like this one', or niche technical writing. Returns up to 10 results with title, URL, published date and author. Complements the Brave-backed web search rather than replacing it.

Retrieve the readable text of up to 10 web pages by URL, with optional query-focused highlights. Exa serves from its crawl cache when the page is fresh enough and live-crawls otherwise, so this answers for pages a plain fetch would be blocked from. Returns per-URL status so a page that could not be read is named rather than silently missing.