api.vextorium.com
Onchain data API on Base, Optimism and Polygon, paid per request with x402.
- Endpoints3,010
- Price per requestfrom $0.001
- Outside payers · 7dn/a
- Answer 4020 of 19
Overview
- Seller wallet
- 0xb9f06d2734b7e9d7b21b64c4d8b95bd774b71acf
- Chains
- BaseOptimismPolygon
- Hosts
- api.vextorium.com
- CategoriesCategoriesAssigned automatically from the seller’s own listing text. A filter hint, not a claim about the service.
- Onchain data1,038Market data603Other409Developer tools407Web data117Security112Identity111Media78Commerce66AI models36Search27Agents6
- First seen
- 2026-10-05 · last seen 2026-10-07
Endpoints
EndpointsDescriptions are the seller's own words from the catalogue and are not checked by us. A listed price is a registration, not an observed charge.https://api.vextorium.com/v1/evm-internal-txs
Internal transactions of an EVM address (native coin moved by contracts, invisible in the normal history): date, type, from, to, value, success and parent transaction.
OptimismOnchain datan/a/ request
2026-10-03
https://api.vextorium.com/v1/evm-is-contract
Whether an address is a contract or a wallet: bytecode size and hash, EIP-7702 delegation and EIP-1167 minimal proxy detection. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, …
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-is-contract
Whether an address is a contract or a wallet: bytecode size and hash, EIP-7702 delegation and EIP-1167 minimal proxy detection. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, …
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-live-balances
Live 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 a…
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-live-balances
Live 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 a…
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-nonce
Confirmed and pending nonce of a wallet, next nonce to use and transactions waiting in the mempool. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-nonce
Confirmed and pending nonce of a wallet, next nonce to use and transactions waiting in the mempool. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-receipt
Transaction 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…
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-receipt
Transaction 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…
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/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.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/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.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-storage
Read a raw storage slot of a contract (decimal, hex or the standard EIP-1967 implementation/admin/beacon slots), as integer and as address, at any block. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, …
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-storage
Read a raw storage slot of a contract (decimal, hex or the standard EIP-1967 implementation/admin/beacon slots), as integer and as address, at any block. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, …
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-token-balance
Balance of one ERC-20 token in a wallet with symbol and decimals. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-token-balance
Balance of one ERC-20 token in a wallet with symbol and decimals. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-token-supply
totalSupply of an ERC-20 token or ERC-721 collection with name, symbol and decimals. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-token-supply
totalSupply of an ERC-20 token or ERC-721 collection with name, symbol and decimals. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-transaction
Full transaction by hash: from, to, value, gas limit and prices, nonce, type, calldata and block. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-transaction
Full transaction by hash: from, to, value, gas limit and prices, nonce, type, calldata and block. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-tx-history
Transaction history of an EVM address (Ethereum, Base, Arbitrum, Optimism, Polygon, zkSync): date, method called, from, to (named when known), value, fee, status and revert reason, plus total fees paid.
OptimismOnchain datan/a/ request
2026-10-03
https://api.vextorium.com/v1/evm-utils
EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/evm-utils
EVM developer utilities: keccak256 hash, function selector from a signature, EIP-55 checksum address and wei/gwei/ether conversion.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/exchange-reserves
On-chain reserves of centralized exchanges (Binance, OKX, Bybit, Coinbase...) from their published wallets: total and ex-own-token assets, net inflows/outflows over 24h, 7d and 30d, spot and derivatives volume and open …
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/exchange-reserves
On-chain reserves of centralized exchanges (Binance, OKX, Bybit, Coinbase...) from their published wallets: total and ex-own-token assets, net inflows/outflows over 24h, 7d and 30d, spot and derivatives volume and open …
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/exploited-vulnerabilities
Vulnerabilities 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 (Micr…
PolygonSecurityn/a/ request
2026-10-06
https://api.vextorium.com/v1/exploited-vulnerabilities
Vulnerabilities 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 (Micr…
OptimismSecurityn/a/ request
2026-10-06
https://api.vextorium.com/v1/extractive-summary
Extractive summary without AI: picks the most representative sentences (term frequency and position scoring) and returns them in original order, with the reduction percentage. Deterministic and instant.
OptimismOthern/a/ request
2026-10-06
https://api.vextorium.com/v1/extractive-summary
Extractive summary without AI: picks the most representative sentences (term frequency and position scoring) and returns them in original order, with the reduction percentage. Deterministic and instant.
PolygonOthern/a/ request
2026-10-06
https://api.vextorium.com/v1/fda-recalls
Recalls enforced by the US FDA for drugs, food or medical devices, latest or by keyword: product, reason, risk class (I-III), company, country, distribution and status. openFDA data (CC0). Not medical advice.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/fda-recalls
Recalls enforced by the US FDA for drugs, food or medical devices, latest or by keyword: product, reason, risk class (I-III), company, country, distribution and status. openFDA data (CC0). Not medical advice.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/fear-greed
Crypto Fear & Greed Index (0-100) with classification. Data source: Alternative.me (attribution included in the response).
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fear-greed
Crypto Fear & Greed Index (0-100) with classification. Data source: Alternative.me (attribution included in the response).
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fear-greed-history
Daily history of the crypto Fear & Greed Index (0 extreme fear, 100 extreme greed): average, max, min, days in each zone and trend, with the series. Alternative.me data.
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fear-greed-history
Daily history of the crypto Fear & Greed Index (0 extreme fear, 100 extreme greed): average, max, min, days in each zone and trend, with the series. Alternative.me data.
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fed-rates
US dollar reference rates from the Federal Reserve Bank of New York: effective fed funds rate (EFFR) with the Fed's target range, SOFR with 30/90/180-day averages, OBFR, TGCR and BGCR, with volumes and percentiles.
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fed-rates
US dollar reference rates from the Federal Reserve Bank of New York: effective fed funds rate (EFFR) with the Fed's target range, SOFR with 30/90/180-day averages, OBFR, TGCR and BGCR, with volumes and percentiles.
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/food-product
Food product facts by barcode (EAN/UPC) from Open Food Facts: name, brand, quantity, Nutri-Score, NOVA processing group, Eco-Score, nutrients per 100 g, allergens, additives, ingredients and countries.
OptimismMedian/a/ request
2026-10-07
https://api.vextorium.com/v1/food-product
Food product facts by barcode (EAN/UPC) from Open Food Facts: name, brand, quantity, Nutri-Score, NOVA processing group, Eco-Score, nutrients per 100 g, allergens, additives, ingredients and countries.
PolygonMedian/a/ request
2026-10-07
https://api.vextorium.com/v1/format-convert
Convert data between JSON, CSV (auto-detects ; , tab |), YAML, XML and JSON Lines. E.g. a spreadsheet CSV to JSON for an agent, or JSON to CSV for Excel.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/format-convert
Convert data between JSON, CSV (auto-detects ; , tab |), YAML, XML and JSON Lines. E.g. a spreadsheet CSV to JSON for an agent, or JSON to CSV for Excel.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/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, r…
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/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, r…
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/funding-rates
Perpetual funding rates on Hyperliquid, dYdX, Paradex and Aevo normalized to 1h, 8h and annualized APR. For one coin it compares venues and the long/short spread; without a coin it lists the biggest cross-exchange fundi…
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/funding-rates
Perpetual funding rates on Hyperliquid, dYdX, Paradex and Aevo normalized to 1h, 8h and annualized APR. For one coin it compares venues and the long/short spread; without a coin it lists the biggest cross-exchange fundi…
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fx-rates
Daily exchange rates against the US dollar for about 60 currencies, emerging ones included (Argentine peso, Turkish lira, rupee, naira...), with date and 1-month change. Bank for International Settlements data.
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/fx-rates
Daily exchange rates against the US dollar for about 60 currencies, emerging ones included (Argentine peso, Turkish lira, rupee, naira...), with date and 1-month change. Bank for International Settlements data.
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/gas-compare-chains
Gas 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.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/gas-compare-chains
Gas 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.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/gas-history
Fee history of the last N blocks on an EVM chain (eth_feeHistory): base fee per block, gas usage and priority tips at the 10th, 50th and 90th percentiles, with a tip recommendation to get included fast. 12 chains.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/gas-history
Fee history of the last N blocks on an EVM chain (eth_feeHistory): base fee per block, gas usage and priority tips at the 10th, 50th and 90th percentiles, with a tip recommendation to get included fast. 12 chains.
PolygonOnchain datan/a/ request
2026-10-06
Evidence
Answers HTTP 402
Answers HTTP 402Method: one unpaid request per listed endpoint. A 402 with a payment payload a client could parse counts. Nothing is paid.0 of 19
0 of 19 probed endpoints answered HTTP 402 with a parseable payment payload
checked 2026-10-07
x402-style payments, last 7 days (Base)
x402-style paymentsMethod: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's exact scheme uses. Some non-x402 gasless sends use it too.unknown
unknown. the 7-day payments read on Base did not complete (ranges over 10000 blocks are not supported on free plan)
window ended 2026-10-07
By chain
| Chain | Seller wallet | Endpoints | Answers 402 | x402-style payments |
|---|---|---|---|---|
| Base | 0xb9f06d2734b7e9d7b21b64c4d8b95bd774b71acf | 1,014 | 0 of 7 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-07 | unknown. the 7-day payments read on Base did not complete (ranges over 10000 blocks are not supported on free plan) |
| Optimism | 0xb9f06d2734b7e9d7b21b64c4d8b95bd774b71acf | 1,007 | 0 of 6 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-07 | unknown. not measured on this chain yet |
| Polygon | 0xb9f06d2734b7e9d7b21b64c4d8b95bd774b71acf | 989 | 0 of 6 probed endpoints answered HTTP 402 with a parseable payment payload 2026-10-07 | unknown. not measured on this chain yet |
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.
Pricing
The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.
Claim this merchant
Sign a message from the payout address 0xb9f06d…b71acf to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.
Data CC-BY-4.0, attribution: data by satohub.ai. Data: x402-list.com (CC BY 4.0). Data as of 2026-10-07. Appearing here is not an endorsement. Check an endpoint with the doctor.