Search arXiv papers | Vextorium
Search scientific papers on arXiv (AI, physics, maths, economics...): title, authors, abstract, categories, dates and PDF link; by relevance or newest, with category filter (cs.AI, cs.CR, q-fin...).
- Category
- Social & people
- Starting price
- $0.001
- Paid calls · 30 days
- 1.3K
- Unique payers · 30 days
- 934
Paid endpoints
230 endpoints, sorted by usage. Prices are per request.
- POST/v1/pypi-package
Python package profile from PyPI: latest version and date, summary, license, required Python, links, dependencies, number of versions and yanked flag.
$0.003Base5calls / 30d - POST/v1/qr-generate
Generate a QR code as SVG or PNG (base64 and data URI) for any text, URL, payment link, Wi-Fi or vCard, with error-correction level, scale and colors.
$0.003Base5calls / 30d - POST/v1/siwe-verify
Verify a Sign-In with Ethereum (EIP-4361) login: parses domain, address, chain, nonce and dates, checks the signature and expiry, and optionally the expected domain and nonce. Authenticate users or agents by wallet.
$0.003Base5calls / 30d - POST/v1/staking-calculator
Staking rewards: final amount, total rewards and average per day and month, with daily compounding or simple, after validator commission, in tokens and optionally in USD.
$0.003Base5calls / 30d - POST/v1/text-chunk
Split long text into overlapping chunks for RAG and embeddings, by characters, words or estimated tokens, keeping sentences or paragraphs whole, with each chunk's position and size.
$0.003Base5calls / 30d - POST/v1/text-diff
Compare two texts by lines or words: similarity %, added and removed items, list of changes with positions, and a unified diff. For contract versions, prompts, configs or scraped pages.
$0.003Base5calls / 30d - POST/v1/text-similarity
Similarity between two texts without AI: TF-IDF cosine, vocabulary Jaccard and character-trigram Jaccard (catches edited copies), shared words and a verdict. For duplicates, plagiarism checks and deduplication.
$0.003Base5calls / 30d - POST/v1/text-stats
Text statistics without AI: characters, words, sentences, paragraphs, unique words, reading and speaking time, readability (Flesch / Flesch-Kincaid for English, Fernandez-Huerta for Spanish) and most frequent words.
$0.003Base5calls / 30d - POST/v1/text-transform
Transform text: URL slug, remove accents, ASCII, snake_case, camelCase, PascalCase, kebab-case, CONSTANT_CASE, Title, upper, lower, reverse, strip HTML, normalize whitespace and Unicode (NFC/NFKC). One or all at once.
$0.003Base5calls / 30d - POST/v1/time
Trusted UTC time from Vextorium's NTP-synced server clock, with millisecond Unix timestamps, ISO week and weekday. For timestamping and clock checks.
$0.003Base5calls / 30d - POST/v1/timezone-convert
Convert a date and time (or now) from one IANA time zone to up to 25 others: local time, UTC offset, abbreviation, daylight saving flag, weekday, hour difference, UTC and Unix timestamp.
$0.003Base5calls / 30d - POST/v1/url-inspect
Technical inspection of a URL: status, redirects, time to first byte and total time, bytes, compression, content type, cache policy, server, CDN, cookies set, security headers present and all response headers.
$0.003Base5calls / 30d - POST/v1/us-company-search
Search US listed companies registered with the SEC by name or ticker: ticker, official name, CIK and exchange (Nasdaq, NYSE...). Get the right ticker before asking for filings or fundamentals.
$0.003Base5calls / 30d - POST/v1/us-cpi
US inflation (CPI-U): year-on-year headline, core (ex food and energy), energy and food rates, month by month. US Bureau of Labor Statistics, public domain.
$0.003Base5calls / 30d - POST/v1/us-grants
US federal grant opportunities from Grants.gov: title, number, agency, open and close dates, status and link; search by keyword (AI, energy, health...) and agency (NSF, NIH, DOE...), open or forecasted.
$0.003Base5calls / 30d - POST/v1/us-national-debt
Total US public debt outstanding to the penny (held by the public and intragovernmental), with its change over 30 days and one year and the average daily increase. Official US Treasury Fiscal Data.
$0.003Base5calls / 30d - POST/v1/user-agent-parse
Parse a User-Agent string: browser and version, OS and version, device brand and model, device type (mobile, tablet, desktop) and whether it is a bot, an AI crawler (GPTBot, ClaudeBot...) or an HTTP library.
$0.003Base5calls / 30d - POST/v1/uuid
Generate cryptographically secure unique IDs: UUID v4, time-sortable UUID v7, ULID, NanoID, hex, base58 or prefixed tokens (e.g. ord_...), up to 1000 per call.
$0.003Base5calls / 30d - POST/v1/vat-calculate
Standard and reduced VAT rates of any EU member state, and an invoice breakdown (net, VAT, gross) from a net or VAT-inclusive amount, flagging rates that are not in force there.
$0.003Base5calls / 30d - POST/v1/vin-decode
Decode a vehicle identification number (17-character VIN): make, model, year, trim, body, engine, fuel and electrification, transmission, drive, plant city and country, and safety equipment. Official NHTSA vPIC data.
$0.003Base5calls / 30d - POST/v1/website-socials
Social media profiles of a company or project from its website (X/Twitter, LinkedIn, Instagram, Facebook, YouTube, TikTok, GitHub, Telegram, Discord...) plus its contact page. Enrich leads and verify projects.
$0.003Base5calls / 30d - POST/v1/atmospheric-co2
Atmospheric CO2 concentration measured by NOAA at Mauna Loa: latest monthly ppm, yearly change, comparison with 10 years ago and with NOAA's first record (May 1974), and the recent series. U.S. Government data.
$0.002Base5calls / 30d - POST/v1/ics-to-json
Turn an iCal/ICS calendar URL (Google Calendar, Outlook, holidays, events...) into JSON: upcoming events with title, start and end, all-day flag, location, description and link over the next N days; text filter.
$0.002Base5calls / 30d - POST/v1/spain-ine-indicators
Official Spanish indicators from INE: CPI (annual and monthly change), EPA unemployment rate (total and under 25) and house prices (annual and quarterly change), with recent periods. Without an indicator it returns the latest value of all.
$0.002Base5calls / 30d - POST/v1/species-info
Species information by scientific or common name from Wikidata (CC0): scientific name, rank, taxonomy (kingdom to species), common names in several languages, conservation status and link.
$0.002Base5calls / 30d - POST/v1/tropical-cyclones
Active tropical cyclones in the Atlantic and eastern/central Pacific from the US National Hurricane Center: name, type (hurricane, storm...), max wind, pressure, position, movement and links to the official advisory and track.
$0.002Base5calls / 30d - POST/v1/wallet-sanctions-check
Check whether a crypto address (Bitcoin, Ethereum/EVM, Tron, Solana, Litecoin, Monero...) is on the US OFAC SDN sanctions list: sanctioned person or entity, program (country or regime) and currency. Compliance check before sending or receiving funds.
$0.002Base5calls / 30d - POST/v1/crypto-price-fiat
Crypto price in any ECB currency (EUR, GBP, JPY, CHF...): on-chain USD price (Chainlink or Uniswap v3) converted with ECB reference rates.
$0.004Base4calls / 30d - POST/v1/evm-signature-verify
Verify an Ethereum signature: a personal_sign (EIP-191) message or EIP-712 typed data. Recovers the signer address and, if you pass one, confirms it matches. Local computation; EIP-1271 contract wallets are not covered.
$0.003Base4calls / 30d - POST/v1/spain-reverse-geocode
Nearest address to coordinates in Spain with the official CartoCiudad reverse geocoder (IGN): street and number, postcode, municipality, INE code, province, region and cadastral reference.
$0.003Base4calls / 30d - POST/v1/text-extract-entities
Extract from any text, without AI: emails, URLs, phone numbers, IBANs, EVM/Bitcoin/Solana addresses, transaction hashes, IPs, dates, amounts, hashtags, mentions and Spanish tax IDs, deduplicated.
$0.003Base4calls / 30d - POST/v1/robots-txt
Parse a site's robots.txt: whether a user-agent may crawl a path, which AI crawlers (GPTBot, ClaudeBot, Google-Extended, PerplexityBot, CCBot...) are blocked, and declared sitemaps. Check before your agent scrapes.
$0.003Base4calls / 30d - POST/v1/spain-tenders
Spanish public procurement tenders from official PLACSP open data (Plataforma de Contratación del Sector Público): search open calls by keywords, CPV code, province, contract type (works, services, supplies) and budget. Returns title, contracting authority, budget, submission deadline, CPV codes, location, EU funding and the official link. Updated every 20 minutes.
$0.01Base4calls / 30d - POST/v1/spain-contract-awards
Spanish public contracts awarded to a company, or by a contracting authority, from official PLACSP open data: winners, awarded amounts (VAT excluded), dates and official links. Competitive intelligence for B2B agents.
$0.01Base4calls / 30d - POST/v1/company-enrich
Company profile from its domain, without personal data: website title and description, social profiles it links, technologies used, email provider (MX/SPF) and SSL certificate. Read from the company's own website and DNS. Qualify B2B leads or vet a supplier.
$0.006Base4calls / 30d - POST/v1/insider-trades
Latest trades by officers, directors and 10% holders of a US listed company (SEC Form 4): who (title), date, buy or sell, transaction type, shares, price, value and holdings after, plus totals of open-market buys and sells.
$0.006Base4calls / 30d - POST/v1/sanctions-screening
Screen a person, company, vessel or entity against the EU consolidated financial sanctions list and the US OFAC SDN list, with fuzzy matching of names and aliases, program, type, countries and reference. For KYC/AML before paying or onboarding.
$0.006Base4calls / 30d - POST/v1/sec-company-ranking
Rank US listed companies by a figure from their SEC filings (revenue, net income, assets, cash, long-term debt, R&D, dividends paid or buybacks) for a year (CY2025) or quarter (CY2026Q1), with ticker and exchange.
$0.006Base4calls / 30d - POST/v1/spain-company-registry
Company acts registered in Spain's Commercial Registry (BORME section A) for a province and day: new companies with business purpose, address and share capital, dissolutions, insolvencies, capital increases, moves... Filter by act type or name. Company data only. Official BOE open data.
$0.006Base4calls / 30d - POST/v1/us-federal-contracts
US federal government contracts by keyword (USAspending): recipient, amount, awarding agency, dates and description, largest first. For public-sector market research and competitor analysis.
$0.005Base4calls / 30d - POST/v1/broken-links
Check whether a list of URLs, or every link on a page, works: HTTP status, final URL after redirects and broken links first. Up to 50 URLs per call, checked in parallel.
$0.005Base4calls / 30d - POST/v1/eu-tenders
Public tenders and contract awards from all EU countries published in TED (Official Journal of the EU) by keyword and country: title, buyer, notice type, date, tender deadline, estimated value, CPV codes and link. Option: only open tenders.
$0.005Base4calls / 30d - POST/v1/fund-13f-holdings
Holdings an institutional manager reported in its latest SEC 13F (Berkshire, Bridgewater, Renaissance, ARK...): positions with value, shares and weight, total value and changes vs the previous quarter (new, increased, reduced, sold out). Search by manager name or CIK.
$0.005Base4calls / 30d - POST/v1/mcp-inspect
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.
$0.005Base4calls / 30d - POST/v1/detect-language-ai
Language detection with local AI: ISO 639-1 code, language name, confidence and any mixed languages.
$0.003Base4calls / 30d - POST/v1/eu-industrial-production
Industrial production (total industry excluding construction, calendar adjusted): year-on-year monthly change for any European country, the EU or the euro area; without a country, a ranking. Official Eurostat data.
$0.004Base4calls / 30d - POST/v1/eu-vat-vies
Check in the European Commission's VIES whether an EU VAT number is registered for intra-community trade, with name and address where the country publishes them. Needed to invoice other EU businesses without VAT.
$0.004Base4calls / 30d - POST/v1/contract-address-predict
Compute a contract address in advance: CREATE (deployer + nonce) or CREATE2 (deployer + salt + init code hash). For deterministic deployments and verifying announced addresses.
$0.003Base4calls / 30d - POST/v1/crypto-address-validate
Detect and validate a crypto address before sending funds: EVM (EIP-55 checksum), Solana, Bitcoin (legacy, P2SH, SegWit, Taproot), Litecoin, Dogecoin, Tron and Cosmos bech32, with its type and network. Computed locally.
$0.003Base4calls / 30d - POST/v1/eu-consumer-confidence
Consumer confidence indicator (balance, seasonally adjusted) for any European country, the EU or the euro area; without a country, a ranking. Below 0 = more pessimists than optimists. European Commission surveys via Eurostat.
$0.003Base4calls / 30d