Discover / api.vextorium.com

Historical ECB rates | Vextorium

■ Challenge detected

Historical ECB euro reference exchange rate for any date since 1999 and conversion between any two published currencies.

Listed price
$0.003
Challenge detected
4 of the last 10 checks
Median response
388 ms
Last checked
18 Oct, 09:23 UTC
In our index since
27 Sept 2026

Endpoint

curl -i https://api.vextorium.com/v1/ecb-rates-history
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
1,069 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://api.vextorium.com

  • POST/v1/abi-encodeNo price listedEncode a contract function call (calldata) from its signature and arguments, e.g. transfer(address,uint256) with [to, amount]: selector and hex data ready to sign or simulate.
  • POST/nft-de-wallet-pagoNo price listedToken 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.
  • POST/v1/starknet-walletNo price listedStarknet wallet: ETH, STRK, USDC and USDT balances read from their contracts, account nonce, deployment status and USD value.
  • POST/v1/near-accountNo price listedNEAR account (name.near or 64-hex implicit): available and staked NEAR, storage used, whether it has a contract deployed and USD value.
  • POST/info-red-pagoNo price listedReference 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).
  • POST/lei-buscar-pagoNo price listedFind 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.
  • POST/v1/mastodon-mediaNo price listedLatest posts from a Mastodon account (user@instance) that include images, video or audio, with media links and alt text.
  • POST/certificado-ssl-pagoNo price listedTLS certificate of a domain: issuer, validity dates, days until expiry, names covered (SAN), whether it matches the domain and is trusted, TLS version and cipher. For uptime and security monitoring.
  • POST/v1/csv-sqlNo price listedRun a read-only SQL query (SELECT/WITH, WHERE, GROUP BY, ORDER BY, window functions...) over a CSV loaded as table «datos» in a temporary in-memory SQLite database, and get the rows as JSON.
  • POST/v1/pool-apy-historyNo price listedHistory of one liquidity pool's APY and TVL (by its pool id, the 'id' field returned by the DeFi yields service): current, average, min and max APY over the period, current TVL, whether the yield is stable or a one-off spike, and a sampled series. Live from DefiLlama.
  • POST/v1/spain-fuel-prices-by-provinceNo price listedAverage, minimum and maximum price of a fuel in every Spanish province right now, from cheapest to most expensive, with the national average. Official Ministry data updated every 30 minutes.
  • POST/defi-pool-pagoNo price listedDetail of one DeFi pool by its DefiLlama id: current APY (base and rewards), TVL, 7d/30d trend, impermanent-loss risk, exposure, and the APY/TVL evolution over the last 30 days with min and max. Use the id returned by the best-pools search.
  • POST/evm-recibo-pagoNo price listedTransaction receipt: success or failure, gas used, effective gas price, fee, contract created and every event log with address, topics and data. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
  • POST/rpc-publicos-pagoNo price listedKeyless public RPC endpoints (HTTPS and WebSocket) of any EVM chain by name or chainId, with block explorers, native currency and website. Lets an agent connect to any chain.
  • POST/v1/evm-live-balancesNo price listedLive balance of a wallet: native coin plus up to 20 ERC-20 tokens you choose (USDC/USDT by default) in one call. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
  • POST/v1/unit-convertNo price listedConvert units of length, mass, volume, area, speed, temperature, data (KB vs KiB), energy, pressure, time and power, metric and imperial, with exact factors.
  • POST/v1/security-headersNo price listedWebsite security headers audit: HTTPS, HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy and cookie flags, with a score.
  • POST/comparar-versiones-pagoNo price listedSort Semantic Versioning 2.0 versions (pre-releases included), give highest and lowest, the bump type between two, and which satisfy an npm-style range (^1.2.0, ~1.2, >=1.0 <2.0, 1.x || 2.x) plus the best match.
  • POST/tron-transferencias-pagoNo price listedLatest TRC-20 token transfers (USDT, USDC...) of a Tron address: in or out, counterparty, amount, time and hash, with totals of stablecoins received and sent. Optional token filter.
  • POST/v1/atmospheric-co2No price listedAtmospheric 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.
  • POST/v1/evm-utilsNo price listedEVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
  • POST/vivienda-precios-ue-pagoNo price listedYear-on-year change of house prices (house price index, all dwellings) for any European country, or a ranking of all. Official Eurostat data.
  • POST/extraer-pdf-pago$0.012Extract the text of a PDF from its URL.
  • POST/validar-nss-pagoNo price listedValidate a Spanish Social Security affiliation number (12 digits: province, number, control) and return the province of registration. Computed locally; nothing stored.
  • POST/sol-slot-pagoNo price listedCurrent finalized Solana slot and block height, latest block time and a recent blockhash with its last valid height, ready to build transactions.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 25 of 1,069 listed endpoints. Next endpoints First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.vextorium.com

Recent checks

4 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.18 Oct 2026
All 10 checks
When (UTC)ResultHTTPResponse
18 Oct, 09:23 UTCChallenge detected402380ms
17 Oct, 07:50 UTCChallenge detected402372ms
15 Oct, 23:42 UTCChallenge detected402395ms
14 Oct, 19:26 UTCChallenge detected402417ms
12 Oct, 22:31 UTCNo challenge detected200423ms
11 Oct, 00:15 UTCNo challenge detected200394ms
9 Oct, 15:32 UTCNo challenge detected200382ms
8 Oct, 09:33 UTCNo challenge detected200429ms
7 Oct, 03:32 UTCNo challenge detected200376ms
4 Oct, 17:05 UTCNo challenge detected200394ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 18 Oct, 09:23 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Historical ECB rates | Vextorium?

Its listed price is $0.003.

What payment terms does Historical ECB rates | Vextorium advertise?

The listing advertises x402, Base, EVM chain 5042, Optimism, Polygon, Solana, Xrpl, USDC and XRP. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Historical ECB rates | Vextorium listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 27 Sept 2026.

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