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/llm-token-count
Count the tokens of a text with OpenAI tokenizers (o200k for GPT-4o/4.1/5, cl100k for GPT-4/3.5) plus estimates for Claude, Llama and Gemini, with characters per token. Budget LLM calls and split contexts.
OptimismAI modelsn/a/ request
2026-10-06
https://api.vextorium.com/v1/llm-token-count
Count the tokens of a text with OpenAI tokenizers (o200k for GPT-4o/4.1/5, cl100k for GPT-4/3.5) plus estimates for Claude, Llama and Gemini, with characters per token. Budget LLM calls and split contexts.
PolygonAI modelsn/a/ request
2026-10-06
https://api.vextorium.com/v1/llms-txt-read
Read a website's /llms.txt (the standard that tells LLMs what a site is about) as structured data: title, summary, sections with links and descriptions, and whether llms-full.txt exists.
OptimismAI modelsn/a/ request
2026-10-06
https://api.vextorium.com/v1/llms-txt-read
Read a website's /llms.txt (the standard that tells LLMs what a site is about) as structured data: title, summary, sections with links and descriptions, and whether llms-full.txt exists.
PolygonAI modelsn/a/ request
2026-10-06
https://api.vextorium.com/v1/loan-calculator
Loan or mortgage with French amortization (fixed installment): monthly payment, total paid, total interest, approximate APR (TAE) including fees, and a yearly or monthly amortization schedule.
OptimismCommercen/a/ request
2026-10-06
https://api.vextorium.com/v1/loan-calculator
Loan or mortgage with French amortization (fixed installment): monthly payment, total paid, total interest, approximate APR (TAE) including fees, and a yearly or monthly amortization schedule.
PolygonCommercen/a/ request
2026-10-06
https://api.vextorium.com/v1/loan-liquidation-price
Collateralized DeFi loan (Aave/Compound style): health factor, current LTV, collateral liquidation price, drop it can withstand, extra borrowing room and how much to repay or add to reach a 1.5 health factor.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/loan-liquidation-price
Collateralized DeFi loan (Aave/Compound style): health factor, current LTV, collateral liquidation price, drop it can withstand, extra borrowing room and how much to repay or add to reach a 1.5 health factor.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/malicious-ip
Check an IP against public threat lists: botnet command-and-control servers (abuse.ch Feodo Tracker), Tor exit nodes and hijacked or spam networks (Spamhaus DROP). For filtering traffic, sign-ups and payments.
PolygonSecurityn/a/ request
2026-10-07
https://api.vextorium.com/v1/malicious-ip
Check an IP against public threat lists: botnet command-and-control servers (abuse.ch Feodo Tracker), Tor exit nodes and hijacked or spam networks (Spamhaus DROP). For filtering traffic, sign-ups and payments.
OptimismSecurityn/a/ request
2026-10-07
https://api.vextorium.com/v1/malicious-url
Check whether a URL or domain is listed in abuse.ch URLhaus as a malware distribution site in the last 30 days: exact URL match and other malicious URLs on the same host, with threat type, online/offline status and date…
OptimismSecurityn/a/ request
2026-10-07
https://api.vextorium.com/v1/malicious-url
Check whether a URL or domain is listed in abuse.ch URLhaus as a malware distribution site in the last 30 days: exact URL match and other malicious URLs on the same host, with threat type, online/offline status and date…
PolygonSecurityn/a/ request
2026-10-07
https://api.vextorium.com/v1/margin-calculator
Pricing calculator: from any two of cost, price, margin or markup it computes the rest, profit per unit and total, and the price with VAT. Avoids the classic margin vs markup confusion.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/margin-calculator
Pricing calculator: from any two of cost, price, margin or markup it computes the rest, profit per unit and total, and the price with VAT. Avoids the classic margin vs markup confusion.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/market-hours
World stock exchanges clock: status (open, closed, lunch break), local time, today's session and next open for NYSE, Toronto, London, Euronext, Xetra, Madrid, Zurich, Tokyo, Hong Kong, Shanghai, India and Sydney.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/market-hours
World stock exchanges clock: status (open, closed, lunch break), local time, today's session and next open for NYSE, Toronto, London, Euronext, Xetra, Madrid, Zurich, Tokyo, Hong Kong, Shanghai, India and Sydney.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/market-regime
Crypto market regime in one call: BTC and ETH trend vs 50/200-day averages, 30-day realized volatility, open-interest-weighted perp funding, Fear & Greed and stablecoin supply change, scored into risk-on / neutral / ris…
PolygonMarket datan/a/ request
2026-10-06
https://api.vextorium.com/v1/market-regime
Crypto market regime in one call: BTC and ETH trend vs 50/200-day averages, 30-day realized volatility, open-interest-weighted perp funding, Fear & Greed and stablecoin supply change, scored into risk-on / neutral / ris…
OptimismMarket datan/a/ request
2026-10-06
https://api.vextorium.com/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 off…
PolygonAgentsn/a/ request
2026-10-06
https://api.vextorium.com/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 off…
OptimismAgentsn/a/ request
2026-10-06
https://api.vextorium.com/v1/moon-phase
Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.
OptimismOthern/a/ request
2026-10-06
https://api.vextorium.com/v1/moon-phase
Moon phase on a date: name, illuminated percentage, lunar age and the next new and full moon dates. Local astronomical calculation.
PolygonOthern/a/ request
2026-10-06
https://api.vextorium.com/v1/morpho-vaults
Morpho lending vaults run by curators: name, deposited asset, chain, net APY, deposits in USD, fee and curator; filter by asset (USDC, WETH...) and chain, sort by deposits or APY.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/morpho-vaults
Morpho lending vaults run by curators: name, deposited asset, chain, net APY, deposits in USD, fee and curator; filter by asset (USDC, WETH...) and chain, sort by deposits or APY.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/multichain-balances
One address across five EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon): native coin and USDC balance per chain and total USD value.
OptimismOnchain datan/a/ request
2026-10-05
https://api.vextorium.com/v1/multichain-balances
One address across five EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon): native coin and USDC balance per chain and total USD value.
PolygonOnchain datan/a/ request
2026-10-05
https://api.vextorium.com/v1/my-ip
Your public IP address as the server sees it, IPv4/IPv6, network prefix, operator (ASN) and registration country, plus your user agent. Check where an agent exits from or whether a proxy/VPN works.
PolygonIdentityn/a/ request
2026-10-07
https://api.vextorium.com/v1/my-ip
Your public IP address as the server sees it, IPv4/IPv6, network prefix, operator (ASN) and registration country, plus your user agent. Check where an agent exits from or whether a proxy/VPN works.
OptimismIdentityn/a/ request
2026-10-07
https://api.vextorium.com/v1/near-account
NEAR account (name.near or 64-hex implicit): available and staked NEAR, storage used, whether it has a contract deployed and USD value.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/near-account
NEAR account (name.near or 64-hex implicit): available and staked NEAR, storage used, whether it has a contract deployed and USD value.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/new-defi-protocols
DeFi protocols added to DefiLlama in the last N days with TVL, category, chains, whether they have a token and links. Discover new projects early.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/new-defi-protocols
DeFi protocols added to DefiLlama in the last N days with TVL, category, chains, whether they have a token and links. Discover new projects early.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/new-pools
Pools created on DEXs in the last minutes (Uniswap v2/v3 and Aerodrome on Base; Uniswap v2/v3 on Ethereum) read from the factories: new token, paired token, DEX, block and, once DEX Screener indexes it, liquidity, price…
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/new-pools
Pools created on DEXs in the last minutes (Uniswap v2/v3 and Aerodrome on Base; Uniswap v2/v3 on Ethereum) read from the factories: new token, paired token, DEX, block and, once DEX Screener indexes it, liquidity, price…
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/new-safe-tokens
Freshly launched tokens that pass safety filters: on Solana the latest DEX Screener profiles and boosts, on Base/Ethereum pools created in the last hour. Each candidate is checked for minimum liquidity, contract risk an…
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/new-safe-tokens
Freshly launched tokens that pass safety filters: on Solana the latest DEX Screener profiles and boosts, on Base/Ethereum pools created in the last hour. Each candidate is checked for minimum liquidity, contract risk an…
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nft-collection
On-chain profile of an NFT collection (ERC-721/1155): name, symbol, total supply, contract owner/admin, royalties (ERC-2981) and standard, read directly from the contract on Base, Ethereum, Arbitrum, Optimism or Polygon.
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nft-collection
On-chain profile of an NFT collection (ERC-721/1155): name, symbol, total supply, contract owner/admin, royalties (ERC-2981) and standard, read directly from the contract on Base, Ethereum, Arbitrum, Optimism or Polygon.
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nft-info
NFT lookup (ERC-721 / ERC-1155): collection name, owner, token URI and metadata (name, description, image, attributes).
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nft-info
NFT lookup (ERC-721 / ERC-1155): collection name, owner, token URI and metadata (name, description, image, attributes).
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nft-owner
Current owner of an ERC-721 NFT by token_id (ownerOf), with collection name and tokenURI. 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/nft-owner
Current owner of an ERC-721 NFT by token_id (ownerOf), with collection name and tokenURI. 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/nfts-of-wallet
Token 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,…
OptimismOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nfts-of-wallet
Token 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,…
PolygonOnchain datan/a/ request
2026-10-06
https://api.vextorium.com/v1/nostr-profile
Nostr profile by npub, hex key or NIP-05 identifier (name@domain): name, bio, picture, website, NIP-05, Lightning address and latest public notes, queried from several public relays.
PolygonIdentityn/a/ request
2026-10-06
https://api.vextorium.com/v1/nostr-profile
Nostr profile by npub, hex key or NIP-05 identifier (name@domain): name, bio, picture, website, NIP-05, Lightning address and latest public notes, queried from several public relays.
OptimismIdentityn/a/ request
2026-10-06
https://api.vextorium.com/v1/npm-package
npm package profile: latest version, description, license, repository, dependencies, unpacked size, weekly and monthly downloads, maintainers and deprecation flag. For dependency choice and audits.
OptimismDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/npm-package
npm package profile: latest version, description, license, repository, dependencies, unpacked size, weekly and monthly downloads, maintainers and deprecation flag. For dependency choice and audits.
PolygonDeveloper toolsn/a/ request
2026-10-06
https://api.vextorium.com/v1/number-base-convert
Convert 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.
OptimismMedian/a/ request
2026-10-06
https://api.vextorium.com/v1/number-base-convert
Convert 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.
PolygonMedian/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.