Validate JSON data against a JSON Schema (drafts 4 to 2020-12, with format checks): valid flag and every error with its exact path and failing rule. Check API responses or LLM structured output.

Query a JSON document with JSONPath, including filters and functions ($.items[?(@.price > 10)].name, $..id...): matching values and their paths. Send the JSON in «datos» or a URL to fetch it.

Decode a JWT and verify its signature with the public keys of a JWKS URL (RS256, ES256, EdDSA...) or an HMAC secret, checking expiry, audience and issuer; returns header, claims and the exact reason if invalid. Tokens are not stored.

Kaspa: balance of an address (kaspa:...) with transaction count and USD value; without an address, network status (blocks, difficulty, hashrate, circulating and max supply).

Extract keywords and keyphrases from a text without AI (RAKE algorithm scoring frequency and degree), in Spanish or English, plus most frequent words. For tagging, indexing and SEO.

Latest block on an EVM chain: number, hash, time, age in seconds, transaction count, gas used % and base fee.

Find a company's LEI (Legal Entity Identifier) by name, or the record of a LEI: legal name, country, legal form, address, entity and registration status, renewal date, direct parent and company register number.

Validate a Legal Entity Identifier (LEI, ISO 17442): 20-character format and mod-97 check digits, split into LOU prefix and entity part. Computed locally; does not query GLEIF.

Supply yield for an asset on the most used lending markets (Aave v3, Morpho, Compound v3, Spark, Euler, Fluid) by chain: total, base and reward APY and TVL, best first.

On-chain exchange rate of the main Ethereum liquid staking tokens (wstETH, rETH, cbETH, weETH, sfrxETH) against ETH, read from their contracts, with current APY from DefiLlama.

Compare two lists (emails, IDs, wallets, SKUs...): items in both, only in A, only in B, duplicates within each and union, with counts. Up to 100,000 items per list.

Price per million input and output tokens of 300+ language models (OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek...) via OpenRouter, with context window and the estimated cost of one call with your token counts; filter by name or provider, sort by price or context.

Count the tokens of a text with OpenAI tokenizers (o200k for GPT-4o/4.1/5, cl100k for GPT-4/3.5) plus estimates for Claude, Llama and Gemini, with characters per token. Budget LLM calls and split contexts.

Read a website's /llms.txt (the standard that tells LLMs what a site is about) as structured data: title, summary, sections with links and descriptions, and whether llms-full.txt exists.

Loan or mortgage with French amortization (fixed installment): monthly payment, total paid, total interest, approximate APR (TAE) including fees, and a yearly or monthly amortization schedule.

Collateralized DeFi loan (Aave/Compound style): health factor, current LTV, collateral liquidation price, drop it can withstand, extra borrowing room and how much to repay or add to reach a 1.5 health factor.

Check an IP against public threat lists: botnet command-and-control servers (abuse.ch Feodo Tracker), Tor exit nodes and hijacked or spam networks (Spamhaus DROP). For filtering traffic, sign-ups and payments.

Check whether a URL or domain is listed in abuse.ch URLhaus as a malware distribution site in the last 30 days: exact URL match and other malicious URLs on the same host, with threat type, online/offline status and date. Use before an agent fetches or opens a link.

Pricing calculator: from any two of cost, price, margin or markup it computes the rest, profit per unit and total, and the price with VAT. Avoids the classic margin vs markup confusion.

World stock exchanges clock: status (open, closed, lunch break), local time, today's session and next open for NYSE, Toronto, London, Euronext, Xetra, Madrid, Zurich, Tokyo, Hong Kong, Shanghai, India and Sydney.

Crypto market regime in one call: BTC and ETH trend vs 50/200-day averages, 30-day realized volatility, open-interest-weighted perp funding, Fear & Greed and stablecoin supply change, scored into risk-on / neutral / risk-off with every signal explained.

Connect to a remote MCP server (Streamable HTTP) as a client and return its name, version, instructions, capabilities and tool list with descriptions and parameters, without calling any tool. Know what an MCP server offers before trusting it.

Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.

Morpho lending vaults run by curators: name, deposited asset, chain, net APY, deposits in USD, fee and curator; filter by asset (USDC, WETH...) and chain, sort by deposits or APY.

One address across five EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon): native coin and USDC balance per chain and total USD value.

Your public IP address as the server sees it, IPv4/IPv6, network prefix, operator (ASN) and registration country, plus your user agent. Check where an agent exits from or whether a proxy/VPN works.

NEAR account (name.near or 64-hex implicit): available and staked NEAR, storage used, whether it has a contract deployed and USD value.

DeFi protocols added to DefiLlama in the last N days with TVL, category, chains, whether they have a token and links. Discover new projects early.

Pools created on DEXs in the last minutes (Uniswap v2/v3 and Aerodrome on Base; Uniswap v2/v3 on Ethereum) read from the factories: new token, paired token, DEX, block and, once DEX Screener indexes it, liquidity, price and volume. Spot launches early; check risk with token-veredicto.

Freshly launched tokens that pass safety filters: on Solana the latest DEX Screener profiles and boosts, on Base/Ethereum pools created in the last hour. Each candidate is checked for minimum liquidity, contract risk and volume authenticity; only those that pass are returned. Not buy recommendations.

On-chain profile of an NFT collection (ERC-721/1155): name, symbol, total supply, contract owner/admin, royalties (ERC-2981) and standard, read directly from the contract on Base, Ethereum, Arbitrum, Optimism or Polygon.

NFT lookup (ERC-721 / ERC-1155): collection name, owner, token URI and metadata (name, description, image, attributes).

Current owner of an ERC-721 NFT by token_id (ownerOf), with collection name and tokenURI. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.

Token ids of an ERC-721 collection held by a wallet (tokenOfOwnerByIndex on enumerable collections) and the total count. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.

Nostr profile by npub, hex key or NIP-05 identifier (name@domain): name, bio, picture, website, NIP-05, Lightning address and latest public notes, queried from several public relays.

npm package profile: latest version, description, license, repository, dependencies, unpacked size, weekly and monthly downloads, maintainers and deprecation flag. For dependency choice and audits.

Convert integers of any size (signed) between bases 2 to 36: binary, octal, decimal, hex, base32, base36, with bit and byte length and two's complement. Accepts 0x/0b/0o prefixes.

Write a number or money amount in words, in Spanish or English (EUR, USD, GBP, MXN), with correct Spanish apocope (veintiún, un millón de euros). For invoices, cheques and contracts.

OECD Composite Leading Indicator, which anticipates turning points of the business cycle 6-9 months ahead: value (100 = trend), monthly change and phase (expansion, downturn, slowdown, recovery) for major economies, G7 and OECD, or one country's series.

Fetch an OpenAPI/Swagger spec (JSON or YAML) and summarize it for an agent: title, version, servers, authentication schemes and every endpoint with method, path, summary and required parameters.

On-chain crypto options market (Derive, Aevo, Premia...): notional volume over 24h, 7d and 30d in total and per protocol, with changes and market shares. DefiLlama data.

Known vulnerabilities of a software package (npm, PyPI, Go, Maven, crates.io, NuGet, RubyGems, Packagist...) at a given version or overall: CVE/GHSA ids, summary, severity, publication date and fixed versions. Google's OSV.dev database.

Images on a page with URL, alt text, declared size, lazy loading and format, counting images without alt text and flagging missing modern formats. For accessibility and SEO audits.

All links on a page classified as internal or external, with anchor text, nofollow/sponsored, new-tab flags and the most linked external domains. For SEO, crawling and audits.

Estimate password strength with Dropbox's zxcvbn: score 0-4, estimated guesses and crack time for online and offline attacks, weak patterns found (dictionary, dates, sequences...) and tips. Evaluated in memory, never stored or logged.

Create a new PDF with only the pages you choose (e.g. 1-3,7) from a PDF at a URL, returned in base64.

Extract the text of a PDF from its URL.

Merge 2 to 10 PDFs (URLs) into one, in the given order, returned in base64.

Metadata and structure of a PDF (URL): pages, page size, title, author, creator, dates, version, encryption, form fields, attachments, bookmarks (table of contents) and whether it has extractable text or is a scan.

Search a text inside a PDF (URL) and return every match with its page and surrounding snippet, case-insensitive. Find clauses, figures or names in long documents.