Every agent-payable API.

Query live DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA) through Cloudflare's DNS-over-HTTPS resolver. Domain validation, email deliverability pre-checks and infrastructure discovery. Use this when an agent needs to real DNS records via Cloudflare DNS-over-HTTPS.

Convert digital storage units: bits, bytes, KB, MB, GB, TB (decimal, ×1000) and KiB, MiB, GiB, TiB (binary, ×1024) — both systems side by side. Use this when an agent needs to decimal (KB/MB/GB) and binary (KiB/MiB/GiB) units.

Estimate reading time from a word count at any reading speed. Defaults to 200 words per minute — the typical silent-reading speed for adults. Use this when an agent needs to how long a text takes to read, by word count.

Calculate the tip for any bill, the grand total, and how much each person pays when splitting. Defaults to a 15% tip. Use this when an agent needs to tip amount, total and per-person split.

Parse a User-Agent header into structured data: browser (name/version), rendering engine, operating system, and device type/vendor/model. Deterministic — the same string always parses identically. Use this when an agent needs to uA string → browser, engine, OS and device.

Fetch a web page server-side and convert it to clean markdown — headings, links, lists, tables and text, with scripts, styles and boilerplate stripped. The 'reader' pattern agents use to actually understand web pages. SSRF-guarded with redirects re-validated, 10s timeout, 1MB cap. Use this when an agent needs to fetch any page and get clean markdown an LLM can read.

Calculate Body Mass Index from weight (kg) and height (cm), with the WHO weight category and the healthy BMI weight range for your height. Use this when an agent needs to body Mass Index with WHO category.

Convert speed units: kilometers per hour, miles per hour, meters per second, knots and feet per second with exact definitions. Use this when an agent needs to km/h, mph, m/s, knots and ft/s.

Encode text to base64 or decode base64 back to text. Full UTF-8 support including emoji and non-Latin scripts. Use this when an agent needs to uTF-8 safe base64 in both directions.

Calculate the final sale price and the amount saved for any price and percent-off discount, with the working shown. Use this when an agent needs to sale price and savings from a percent off.

Calculate X% of Y, what percent X is of Y, and the percent change between two values — with step-by-step working shown. Use this when an agent needs to percent of a number, ratios and percent change.

Parse a URL into all its components: protocol, hostname, port, path segments, query parameters (as a clean object), hash and credentials. Exact — no guessing by eye. Use this when an agent needs to break any URL into protocol, host, path and params.

Full on-chain due-diligence report for any NFT collection: mint supply, unique holders, top-10 ownership concentration with a verdict, wash-trading indicators from transfer patterns, and recent activity trend. Read straight from the chain — the check an agent runs before its human buys. Use this when an agent needs to the Carfax for NFT collections — holders, concentration, wash signals.

Live weather from Open-Meteo: current temperature, humidity, wind and conditions plus a 3-day forecast, by city name or coordinates. No API key, cached 30 minutes. Use this when an agent needs to current conditions + 3-day forecast for any city.

Calculate a transaction's gas fee: gas units × gas price (gwei) gives the ETH cost, multiplied by the ETH price for USD. Exact BigInt math for the wei amounts. Use this when an agent needs to transaction cost in ETH and USD from gas × gwei.

Explain what an EVM transaction would actually do: decodes the calldata (ERC-20 transfers/approvals via known ABIs, unknown selectors via the 4byte directory) and simulates the call against live chain state to report the outcome — including unlimited-approval warnings — without sending anything. Use this when an agent needs to decode and simulate a transaction — before signing it.

Extract every HTML table from a page (or raw HTML) as structured JSON: headers and rows kept intact. The deterministic answer to 'get the pricing table / comparison table / stats table from this page' — no vision model needed. Use this when an agent needs to hTML tables → structured JSON rows and columns.

Live foreign-exchange reference rates from the European Central Bank (via frankfurter.dev): a full rate table against any base currency, or cross-rate conversion of any amount. Refreshed every business day by the ECB, cached one hour. Use this when an agent needs to live ECB reference rates for 30 currencies.

Geolocate any IPv4/IPv6 address (or the caller's own IP when omitted) via ipwho.is: country, region, city, coordinates, timezone, ASN/network owner and currency. Cached 24 hours per IP. Use this when an agent needs to where is an IP address? Country, city, ASN, timezone.

Calculate the API cost of an LLM call: input and output tokens × published per-million prices for 15 current models (OpenAI, Anthropic, Google, DeepSeek, xAI, Meta). Batch multiplier included for monthly estimates. Use this when an agent needs to tokens × current per-model prices = USD.

Turn a cron expression into plain English, validate it, and compute the exact next execution times. Deterministic — the answer to 'when does this cron actually fire?' without guessing. Use this when an agent needs to explain a cron expression and compute the next runs.

Reference database of all 250 countries and territories: ISO 3166-1 codes, capitals, regions, population, area, currencies, languages, TLDs and calling codes. Look up a single country or list by region. Use this when an agent needs to 250 countries: codes, capitals, currencies, populations.

Verify a claim about a web page's content: fetches the page (SSRF-guarded) and reports whether the expected text appears, with the surrounding excerpt as evidence. The deterministic way for an agent to confirm 'the site says X' before acting on it. Use this when an agent needs to does this page actually say that? Checked, not guessed.

Convert numbers to Roman numerals (1–3999) and Roman numerals back to numbers, with strict validation that rejects non-standard forms like IIIM or VX. Use this when an agent needs to numbers ↔ Roman numerals, with validation.

Convert text between nine letter cases: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. camelCase boundaries are split automatically. Use this when an agent needs to camelCase, snake_case, kebab-case and more.

Look up any US telephone area code to find the state or territory it serves, or list every area code in a given state. Covers all 404 NANP codes in use, including overlays. Use this when an agent needs to all 404 NANP area codes → state lookup.

Convert Unix epoch timestamps to ISO/UTC dates and back. Millisecond timestamps are detected automatically; invalid dates are rejected with clear errors. Use this when an agent needs to epoch seconds ↔ human dates, both directions.

Look up an address's NFT portfolio across collections: each collection held, quantity owned, sorted by size. The enrichment endpoint for agents profiling wallets — pairs with wallet-snapshot for the full picture. Use this when an agent needs to every NFT collection a wallet holds, in one call.

Add VAT to a net amount or remove VAT from a gross amount. Standard VAT rates for 36 countries are built in, or override with any custom rate. Use this when an agent needs to add or remove VAT at standard rates for 36 countries.

Returns the current date and time in any IANA time zone, plus Unix seconds/milliseconds, ISO 8601, weekday and day-of-year. Use it whenever an agent needs to know 'now'. Use this when an agent needs to the current date/time in any time zone — agents have no clock.

Parse iCalendar (.ics) content — meeting invites, conference calendars, exports from Google/Outlook — into structured event JSON: title, start/end, location, organizer and description. Use this when an agent needs to turn .ics calendar files into clean event JSON.

List upcoming or full-year public holidays for any covered country via Nager.Date — names, dates and whether they're nationwide. Essential for scheduling agents. Use this when an agent needs to upcoming public holidays for ~110 countries.

Fetch a URL server-side and extract its title, meta description, Open Graph and Twitter card tags, canonical URL and favicon — the data agents need to preview or classify a link. SSRF-guarded: private networks are blocked, 10s timeout, 1MB cap. Use this when an agent needs to title, description, OG image and favicon of any page.

Count business days (Mon–Fri) between two dates, with weekend and holiday breakdown. Provide a country code and real public holidays (via Nager.Date) are excluded too. Use this when an agent needs to working days between dates, optionally minus public holidays.

Describe what you need and get back matching x402-paid APIs: our own catalog (54 tools) plus, optionally, the live x402 Bazaar of third-party sellers. The agent's meta-tool — instead of knowing an API exists, ask for the capability. Use this when an agent needs to "I need a tool that does X" → matched paid APIs.

Decode a JSON Web Token's header and payload to readable JSON. Pure decoding: signatures are NOT verified and no secret is needed. Accepts standard and URL-safe base64 with or without padding; claims like exp and iat are rendered as dates. Use this when an agent needs to decode header and payload — no verification.

Check whether a domain name is registered or available, via the official RDAP registry protocol (404 = available). For registered domains it also returns the registrar and creation/expiration dates — useful when an agent needs to name a product or verify how long a business has existed. Use this when an agent needs to is this domain taken? Registry answer, not a landing page.

Fetch a PDF (by URL, SSRF-guarded) or accept it as base64 and extract all readable text with page count. Deterministic parsing — no language model, so nothing is invented. Text-based PDFs only; scanned images need OCR (not included). Use this when an agent needs to extract readable text from any PDF — agents can't read PDFs.

Generate a QR code for any text, URL or crypto address: returns ready-to-embed SVG markup and a data URI, with configurable size and error-correction level. Use this when an agent needs to any text or URL as a QR code (SVG + PNG data URI).

One-call on-chain profile of any Ethereum or Base wallet via Blockscout: native balance, transaction and transfer counts, activity recency, top token holdings, and most frequent recent counterparties — with fresh-wallet and high-volume flags. The 'who is this address?' conclusion, not raw RPC data. Use this when an agent needs to on-chain wallet profile: balance, activity, tokens, counterparties.

Project the future value of a deposit with compound interest: choose annual, semi-annual, quarterly, monthly, weekly or daily compounding and see total interest earned. Use this when an agent needs to future value with any compounding frequency.

Live transfer feed of an NFT collection with per-address accumulation analysis: net quantities received vs sent over recent activity, ranking the buyers adding to positions and the wallets exiting. The actionable view behind the raw transfer list. Use this when an agent needs to who is accumulating and who is exiting — right now.

Compare two texts line by line using an LCS diff: exact additions, removals and context — in unified-diff style. Deterministic, unlike asking a model to 'find the differences'. Use this when an agent needs to exact line-level diff with unified-style output.

Scan unstructured text and extract structured entities: email addresses, URLs, IPv4 addresses, phone numbers and domains. Deduplicated, categorized, machine-ready. Use this when an agent needs to pull emails, URLs, IPs, phones and domains from raw text.

Count the total days between two dates, plus the breakdown in weeks and days and in calendar years, months and days. Use this when an agent needs to days, weeks and calendar time between two dates.

Convert between metric and imperial length units: kilometers, meters, centimeters, millimeters, micrometers, nanometers, miles, yards, feet, inches and nautical miles. Use this when an agent needs to metric and imperial distance units, instantly.

Look up MIME content types by type substring or file extension, or list a category — covering text, application, image, audio, video, font and multipart types used in web APIs. Use this when an agent needs to content-Type lookup by type or file extension.

Convert cooking and liquid volume units: milliliters, liters, cubic meters, US gallons, quarts, pints, cups, fluid ounces, tablespoons and teaspoons. Use this when an agent needs to liters, gallons, cups, milliliters.

Convert between Celsius, Fahrenheit and Kelvin with exact formulas, reference points (freezing and boiling water) and step-by-step working. Use this when an agent needs to celsius, Fahrenheit and Kelvin, both ways.

Split text into retrieval-friendly chunks with a token budget and sentence-aware boundaries. Overlap between consecutive chunks preserves context across splits — the standard preparation step before embedding. Use this when an agent needs to rAG-ready chunks with token budgets and overlap.