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.

x402
Base
EVM chain 5042
Optimism
Polygon
Solana
Xrpl
USDC
XRP
Blockchain

Listed price: $0.003
Challenge detected: 3 of the last 9 checks
Median response: 395 ms
Last checked: 17 Oct, 07:50 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/deficit-ue-pagoNo price listedAnnual government deficit (-) or surplus (+) as % of GDP for any European country; without a country, a ranking. Official Eurostat data.
POST/token-suministro-pagoNo price listedERC-20 token supply: total minted, burned (dead addresses), approximate circulating, and the contract owner's balance and share if it has one. A concentration and issuer-control signal.
POST/simulador-dca-pagoNo price listedBacktest buying a fixed amount of a token every N days (dollar-cost averaging) since a past date: invested, units, average cost, current value, return, and comparison with investing everything at the start. Prices from DefiLlama.
POST/v1/number-base-convertNo price listedConvert 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.
POST/v1/gas-compare-chainsNo price listedGas price right now on Base, Ethereum, Arbitrum, Optimism and Polygon, with the estimated USD cost of a native transfer, an ERC-20 transfer and a swap on each, and the cheapest chain.
POST/defi-movimientos-pagoNo price listedDeFi protocols with the largest TVL rise or fall over 1 hour, 1 day or 7 days, with minimum-TVL and category filters. Spot capital inflows, mass exits or possible incidents early. Live from DefiLlama.
POST/direccion-identidad-pagoNo price listedWho an EVM address is before you interact: public labels (exchange, protocol, bridge, fund...), ENS name, whether it is a contract and which, verification, scam flag or poor reputation, EIP-7702 delegation, balance and activity.
POST/v1/xrp-accountNo price listedXRP Ledger account: XRP balance and locked reserve, trust lines with other assets (RLUSD, USDC...), sequence, domain and USD value.
POST/virtuals-agentes-pagoNo price listedAI agent tokens on Virtuals Protocol (Base and Solana): search by name/symbol/category, or rank by market cap, 24h volume, top gainers/losers, newest launches or holders. Returns market cap, 24h change, volume, holders, category, chain and contract. Live from the Virtuals API.
POST/polymarket-operaciones-pagoNo price listedRecent trades of a Polymarket market (by slug): buys and sells per outcome with price, USD size, wallet and tx, net buy/sell flow per outcome and the largest orders. Set a minimum size to follow whales.
POST/ine-espana-pagoNo price listedOfficial 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.
POST/v1/exploited-vulnerabilitiesNo price listedVulnerabilities being actively exploited according to CISA's KEV catalog: CVE, vendor, product, name, description, date added, remediation due date and ransomware use; the latest N days or search by vendor/product (Microsoft, Cisco, Fortinet...).
POST/v1/build-transactionNo price listedBuild 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 warns if it would revert and the estimated cost.
POST/resumir-pagoNo price listedAI text summarization and analysis (Qwen3-4B, local). Send any text in the 'texto' field (you may start it with an instruction, e.g. 'Summarize in 3 bullets: ...') and get a concise summary or analysis in the same language.
POST/v1/polymarket-historyNo price listedHow the probability of a Polymarket outcome moved over the last hour, day, week, month or all time, with max, min and change in percentage points.
POST/sol-saldo-token-pagoNo price listedBalance of one SPL or Token-2022 token in a Solana wallet, with decimals and number of token accounts.
POST/v1/contract-creatorNo price listedWho deployed an EVM contract and when: creator address (named when known), creation transaction and date, contract name, verification, proxy type and implementation, and scam flag.
POST/v1/website-socialsNo price listedSocial 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.
POST/openapi-resumen-pagoNo price listedFetch 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.
POST/v1/protocol-securityNo price listedSecurity profile of a DeFi protocol by name (Aave, Curve, Pendle...): number of audits and their links, hacks suffered, TVL broken down by chain, category and market cap. More audits and zero hacks is a better signal. Live from DefiLlama.
POST/v1/solana-token-supplyNo price listedTotal supply of a Solana token with decimals, mint authority, freeze authority and token program.
POST/x402-buscar-pagoNo price listedSearch x402 paid services in the Bazaar by keyword (e.g. weather, solana, search) ranked by real usage, with price, networks and ready-to-pay URL. Lets an agent find the service it needs.
POST/beefy-posiciones-pagoNo price listedAll 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.
POST/precio-cripto-pagoNo price listedCrypto price in USD and EUR from on-chain sources only: Chainlink oracles (BTC, ETH, USDC) or Uniswap v3 quotes on Base (USDT, DAI or any Base token address); EUR via ECB rate.
POST/v1/token-holdersNo price listedLargest holders of an ERC-20 token: address (named or labelled when known: exchanges, protocols...), amount and % of supply, total holder count and top-10 concentration.

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.17 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
17 Oct, 07:50 UTC	Challenge detected	402	372ms
15 Oct, 23:42 UTC	Challenge detected	402	395ms
14 Oct, 19:26 UTC	Challenge detected	402	417ms
12 Oct, 22:31 UTC	No challenge detected	200	423ms
11 Oct, 00:15 UTC	No challenge detected	200	394ms
9 Oct, 15:32 UTC	No challenge detected	200	382ms
8 Oct, 09:33 UTC	No challenge detected	200	429ms
7 Oct, 03:32 UTC	No challenge detected	200	376ms
4 Oct, 17:05 UTC	No challenge detected	200	394ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 07:50 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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