api.vextorium.com

• https://api.vextorium.com/v1/apr-apy

  Convert APR to APY or APY to APR for any compounding frequency (continuous, daily, hourly, per block...) and optionally project the final value and gain of a deposit over N days. Useful to compare DeFi yields.

  OptimismMedia

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/aptos-wallet

  Aptos wallet: APT balance and other fungible assets (USDC, USDT...) with amount and USD value, number of sent transactions and whether the account exists.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/arxiv-search

  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...).

  OptimismOther

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/asn-info

  Information about an autonomous system: holder, whether it announces routes, registry block, number of IPv4 and IPv6 prefixes announced, approximate IPv4 addresses and a sample of prefixes. RIPEstat data.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/atmospheric-co2

  Atmospheric CO2 concentration measured at Mauna Loa (NOAA): latest monthly ppm, yearly change, comparison with 10 years ago and with 1958, and the recent series.

  OptimismOther

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/barcode-generate

  Generate a barcode as SVG (EAN-13, EAN-8, UPC-A, ISBN, ISSN, Code 128, Code 39, ITF, GS1-128...) for labels and products, computing the check digit when missing.

  OptimismMedia

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/barcode-validate

  Validate EAN-8, EAN-13, UPC-A, GTIN-14, ISBN-10 and ISBN-13: check digit (and the expected one if wrong), code type, GS1 prefix and registering country, plus ISBN-10/13 conversion.

  OptimismDeveloper tools

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/basename-resolve

  Resolve a Basename (name.base.eth on Base) to its address, or an address to its verified primary Basename (reverse record checked forward).

  OptimismOther

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/beefy-best-vaults

  Best-yielding active Beefy Finance vaults for a token (USDC, WETH, cbBTC...), on one chain or all, with a minimum TVL for solidity: APY (auto-compounded, net of Beefy fee), TVL, platform, assets, risk flags and a direct…

  OptimismOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/beefy-best-vaults

  Best-yielding active Beefy Finance vaults for a token (USDC, WETH, cbBTC...), on one chain or all, with a minimum TVL for solidity: APY (auto-compounded, net of Beefy fee), TVL, platform, assets, risk flags and a direct…

  PolygonOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/beefy-positions

  All Beefy Finance vault positions of a wallet on Base, Ethereum, Arbitrum, Optimism or Polygon, read on-chain (shares and price per share) and valued in USD, including retired vaults where funds are often forgotten.

  PolygonOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/beefy-positions

  All Beefy Finance vault positions of a wallet on Base, Ethereum, Arbitrum, Optimism or Polygon, read on-chain (shares and price per share) and valued in USD, including retired vaults where funds are often forgotten.

  OptimismOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/beefy-vault

  Full detail of a Beefy Finance vault by id or vault contract address: APY breakdown, TVL, performance/deposit/withdraw fees, risk flags, deposited token and price, vault and strategy contracts, last harvest, plus an on-…

  PolygonOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/beefy-vault

  Full detail of a Beefy Finance vault by id or vault contract address: APY breakdown, TVL, performance/deposit/withdraw fees, risk flags, deposited token and price, vault and strategy contracts, last harvest, plus an on-…

  OptimismOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/bic-validate

  BIC/SWIFT code validation and parsing: bank, country, location and branch codes, test-code flag.

  OptimismDeveloper tools

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/bitcoin-address

  Balance of any Bitcoin address (legacy, P2SH, SegWit or Taproot) in BTC, sats and USD, pending mempool amount, total received and sent, transaction count and the latest transactions with net effect and confirmations.

  OptimismOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/bitcoin-address

  Balance of any Bitcoin address (legacy, P2SH, SegWit or Taproot) in BTC, sats and USD, pending mempool amount, total received and sent, transaction count and the latest transactions with net effect and confirmations.

  PolygonOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/bitcoin-mining-pools

  Bitcoin mining over the last N blocks (max 144, ~1 day): blocks per pool (Foundry, AntPool, ViaBTC, F2Pool...) with share and estimated hashrate, average block reward (subsidy + fees), fees as % of reward and average bl…

  OptimismOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/bitcoin-mining-pools

  Bitcoin mining over the last N blocks (max 144, ~1 day): blocks per pool (Foundry, AntPool, ViaBTC, F2Pool...) with share and estimated hashrate, average block reward (subsidy + fees), fees as % of reward and average bl…

  PolygonOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/bitcoin-mining-profitability

  Bitcoin mining profitability now: hashprice (USD per TH/s per day) from the real subsidy and recent fees, and for your machine (hashrate, J/TH efficiency and power price) daily revenue, electricity cost, profit and brea…

  OptimismMarket data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/bitcoin-network

  Bitcoin network now: block height and latest blocks, recommended fees in sat/vB to confirm in 1, 3, 6, 24 or 144 blocks, mempool size, difficulty, estimated hashrate and next difficulty adjustment (date and expected cha…

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/bitcoin-tx

  Status of a Bitcoin transaction by txid: confirmed or in mempool, confirmations, block, total fee and fee rate (sat/vB), size, RBF flag, inputs and outputs with amounts.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/block-by-date

  Block number closest to a date and time on EVM chains (ethereum, base, arbitrum, optimism, polygon, bsc, avax...), with the block's own timestamp. For historical state queries and event filters.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/blockchain-status

  Live status of Bitcoin, Solana and 12 EVM chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic, Unichain): latest block, seconds since last block, gas and whether each …

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/book-info

  Book data by ISBN (10 or 13) or search by title and author on Open Library: title, authors, publisher, year, pages, languages, subjects, cover and links.

  OptimismSearch

  n/a/ request

  2026-10-03

• https://api.vextorium.com/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.

  PolygonDeveloper tools

  n/a/ request

  2026-10-05

• https://api.vextorium.com/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.

  OptimismDeveloper tools

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/build-transaction

  Build an EVM transaction ready to sign (never signed or sent): native transfer, ERC-20 transfer or ERC-20 approve, with to, data, value, nonce, chainId, estimated gas and current EIP-1559 fees, plus a simulation that wa…

  PolygonOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/build-transaction

  Build an EVM transaction ready to sign (never signed or sent): native transfer, ERC-20 transfer or ERC-20 approve, with to, data, value, nonce, chainId, estimated gas and current EIP-1559 fees, plus a simulation that wa…

  OptimismOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/business-days

  Business days in 150+ countries and their regions: count between two dates, or the date after adding N business days, skipping weekends and official holidays, listing the holidays in the range.

  OptimismOther

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/cardano-wallet

  Cardano wallet by address (addr1...) or stake account (stake1...): ADA balance, delegated pool and DRep, available rewards, native tokens and USD value.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/central-bank-press

  Latest press releases from central banks and financial regulators (Federal Reserve, ECB, Bank of England, SEC, CFTC, ESMA) in one feed by date, with title, link and summary; filter by source or keyword (rate, crypto, st…

  OptimismMarket data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/central-bank-rates

  Policy interest rate of about 40 central banks (Fed, ECB, BoE, BoJ, Banxico, BCB...): latest rate and date as a ranking, or one country's monthly history with every hike and cut. Bank for International Settlements data.

  PolygonMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/central-bank-rates

  Policy interest rate of about 40 central banks (Fed, ECB, BoE, BoJ, Banxico, BCB...): latest rate and date as a ranking, or one country's monthly history with every hike and cut. Bank for International Settlements data.

  OptimismMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chain-compare

  Compare two blockchains by DeFi TVL: value locked, share of the whole market and gas token, plus which one is bigger. Live from DefiLlama.

  PolygonOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/chain-compare

  Compare two blockchains by DeFi TVL: value locked, share of the whole market and gas token, plus which one is bigger. Live from DefiLlama.

  OptimismOnchain data

  n/a/ request

  2026-10-05

• https://api.vextorium.com/v1/chain-info

  Reference data for a blockchain by its chainId: name, gas/native token, block explorers, number of public RPCs and website. Utility for multi-chain agents. Live from chainid.network (ethereum-lists, open data).

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/chain-stats

  Statistics of an EVM chain: total and today's transactions, addresses, blocks, average block time, gas prices (slow, average, fast), network utilization, native token price and market cap.

  OptimismOnchain data

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/chain-top-protocols

  Ranking of the DeFi protocols with the most TVL on a specific chain (Base, Solana, Arbitrum, BSC...), with category, 7-day change and share of the chain's TVL. Optional category filter.

  OptimismOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chain-top-protocols

  Ranking of the DeFi protocols with the most TVL on a specific chain (Base, Solana, Arbitrum, BSC...), with category, 7-day change and share of the chain's TVL. Optional category filter.

  PolygonOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chain-tvl-history

  TVL history of a blockchain: current value, all-time high and its date, distance from ATH, 30d and 1y change, plus a sampled series. Shows where a chain sits in the cycle. Live from DefiLlama.

  OptimismOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chain-tvl-history

  TVL history of a blockchain: current value, all-time high and its date, distance from ATH, 30d and 1y change, plus a sampled series. Shows where a chain sits in the cycle. Live from DefiLlama.

  PolygonOnchain data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chainlink-price

  Tamper-resistant price from Chainlink Data Feeds on Base (ETH/USD, BTC/USD, USDC/USD, or any Chainlink aggregator address), with update time and staleness in seconds.

  OptimismMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/chainlink-price

  Tamper-resistant price from Chainlink Data Feeds on Base (ETH/USD, BTC/USD, USDC/USD, or any Chainlink aggregator address), with update time and staleness in seconds.

  PolygonMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/clinical-trials

  Clinical trials on ClinicalTrials.gov by disease, drug or sponsor: title, NCT id, status, phase, conditions, interventions, sponsor, dates, enrollment and countries; recruiting ones by default.

  OptimismOther

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/color-contrast

  Convert a color between HEX, RGB, HSL, HSV and CMYK and, given a background, compute the WCAG 2.x contrast ratio with AA/AAA pass flags; without background, suggests black or white text.

  OptimismDeveloper tools

  n/a/ request

  2026-10-03

• https://api.vextorium.com/v1/commodities

  Monthly prices of about 70 commodities (Brent and WTI oil, natural gas, coal, gold, silver, copper, aluminium, wheat, maize, coffee, cocoa, sugar, fertilizers...) for the latest published month, with monthly and annual …

  PolygonMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/commodities

  Monthly prices of about 70 commodities (Brent and WTI oil, natural gas, coal, gold, silver, copper, aluminium, wheat, maize, coffee, cocoa, sugar, fertilizers...) for the latest published month, with monthly and annual …

  OptimismMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/commodity-history

  Monthly price series of a commodity (gold, Brent, copper, wheat, coffee...) going back up to 60 years, with high, low and change over the period. World Bank Pink Sheet.

  PolygonMarket data

  n/a/ request

  2026-10-06

• https://api.vextorium.com/v1/commodity-history

  Monthly price series of a commodity (gold, Brent, copper, wheat, coffee...) going back up to 60 years, with high, low and change over the period. World Bank Pink Sheet.

  OptimismMarket data

  n/a/ request

  2026-10-06

By chain

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.