api.vextorium.com
No description published for this endpoint.
OtherLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far.
$13.51
Verified settled volume
3,580 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0060
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCfThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"amount": "6000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "4ZHcGaij9ktYqm9dNvMSMLsbT5D7BUrXDEzQGVH5h3Q6"
},
"payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
"amount": "6000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"amount": "6000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
"extra": {
"name": "GatewayWalletBatched",
"assets": [
{
"symbol": "USDC",
"address": "0x0b2c639c533813f4aa9d7837caf62653d097ff85",
"decimals": 6,
"authorizationVersions": [
"1",
"2"
]
}
],
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"minValiditySeconds": 604800
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"amount": "6000",
"scheme": "exact",
"network": "eip155:10",
"maxTimeoutSeconds": 604900
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "GatewayWalletBatched",
"assets": [
{
"symbol": "USDC",
"address": "0x3600000000000000000000000000000000000000",
"decimals": 6,
"authorizationVersions": [
"1",
"2"
]
}
],
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"minValiditySeconds": 604800
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"amount": "6000",
"scheme": "exact",
"network": "eip155:5042",
"maxTimeoutSeconds": 604900
},
{
"asset": "524C555344000000000000000000000000000000",
"extra": {
"issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
"invoiceId": "9670ED2A24844BB18754F1A2CCA23541",
"sourceTag": 804681468,
"areFeesSponsored": false
},
"payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
"amount": "0.006",
"scheme": "exact",
"network": "xrpl:0",
"maxTimeoutSeconds": 300
},
{
"asset": "XRP",
"extra": {
"invoiceId": "46900155E96D43E2A8838A8BEADD7F3E",
"sourceTag": 804681468,
"areFeesSponsored": false
},
"payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
"amount": "4620",
"scheme": "exact",
"network": "xrpl:0",
"maxTimeoutSeconds": 300
}
],
"message": "Payment required: 0.006 USD per call (USDC on Base, Solana or Polygon, or RLUSD or XRP on XRPL) via x402 v2. Send a POST with a JSON body, e.g. {\"chain\":\"ethereum\",\"token\":\"USDC\",\"min_usd\":1000000}, using any x402 client (e.g. `npx awal x402 pay <url> -X POST -d '<json>'`). The payment terms are in the PAYMENT-REQUIRED header and repeated in this body. Failed requests are not charged. Docs: https://api.vextorium.com/llms.txt",
"resource": {
"url": "https://api.vextorium.com/v1/whale-transfers",
"tags": [
"whales",
"transfers",
"onchain",
"tokens",
"alerts"
],
"iconUrl": "https://api.vextorium.com/icono.svg",
"mimeType": "application/json",
"description": "Whale tracker: large ERC-20 transfers (USDC, USDT, WETH, WBTC or any token address) in the last ~hour on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB, sorted by USD value, with sender, receiver and tx hash.",
"serviceName": "Vextorium"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"chain": "ethereum",
"token": "USDC",
"min_usd": 1000000
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"chain": "ethereum",
"count": 97,
"token": "USDC",
"source": "Public node (ethereum-rpc.publicnode.com); price: DefiLlama",
"min_usd": 1000000,
"to_block": 26177065,
"total_usd": 466154293.04,
"transfers": [
{
"to": "0xd1c6aca7ea7ed44e1873dafa054c28ceb690c7eb",
"tx": "0xefdb2d664c498574cc68b851973cf76650d7ed558b5366efb46905fca3eeba9e",
"usd": 111735906.73,
"from": "0xbbbbbbbbbb9cc5e90e3b3af64bdaf62c37eeffcb",
"block": 26176951,
"amount": 111765038.5476
},
{
"to": "0xbbbbbbbbbb9cc5e90e3b3af64bdaf62c37eeffcb",
"tx": "0xefdb2d664c498574cc68b851973cf76650d7ed558b5366efb46905fca3eeba9e",
"usd": 111735906.73,
"from": "0xd1c6aca7ea7ed44e1873dafa054c28ceb690c7eb",
"block": 26176951,
"amount": 111765038.5476
}
],
"from_block": 26176766,
"blocks_scanned": 300,
"token_price_usd": 0.9997393476282688,
"transfers_scanned": 28526
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"token"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base",
"arbitrum",
"optimism",
"polygon",
"bnb"
],
"type": "string"
},
"token": {
"type": "string",
"description": "Symbol (USDC, USDT, WETH, WBTC, CBBTC) or 0x contract"
},
"blocks": {
"type": "integer",
"description": "Blocks to scan (default ~1 hour)"
},
"min_usd": {
"type": "number"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": [
"object",
"null"
],
"properties": {
"chain": {
"type": [
"string",
"null"
]
},
"count": {
"type": [
"number",
"null"
]
},
"token": {
"type": [
"string",
"null"
]
},
"source": {
"type": [
"string",
"null"
]
},
"min_usd": {
"type": [
"number",
"null"
]
},
"to_block": {
"type": [
"number",
"null"
]
},
"total_usd": {
"type": [
"number",
"null"
]
},
"transfers": {
"type": [
"array",
"null"
],
"items": {
"type": [
"null",
"object"
],
"properties": {
"to": {
"type": [
"null",
"string"
]
},
"tx": {
"type": [
"null",
"string"
]
},
"usd": {
"type": [
"null",
"number"
]
},
"from": {
"type": [
"null",
"string"
]
},
"block": {
"type": [
"null",
"number"
]
},
"amount": {
"type": [
"null",
"number"
]
}
}
}
},
"from_block": {
"type": [
"number",
"null"
]
},
"blocks_scanned": {
"type": [
"number",
"null"
]
},
"token_price_usd": {
"type": [
"number",
"null"
]
},
"transfers_scanned": {
"type": [
"number",
"null"
]
}
}
}
}
}
}
}
}
},
"method_hint": "This endpoint is called with POST; GET only returns these payment terms.",
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.006USDC≈ $0.006 USD
on Base · exact scheme
Pay 0.006 USDC on Base to 0xb9f0…71aCf. The signed payment is good for 5 minutes.
- Paid to
- 0xb9f0…71aCf
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 6000 smallest units
- Returns
- application/json
6000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- HcjfmZ…t3pz2
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
- Returns
- application/json
6000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb9f0…71aCf
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
- Returns
- application/json
6000units
on Optimism · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb9f0…71aCf
- Token contract
- 0x0b2C…7Ff85
- Payment window
- 168 hours
- Returns
- application/json
6000units
on eip155:5042 · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb9f0…71aCf
- Token contract
- 0x3600…00000
- Payment window
- 168 hours
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.vextorium.com/v1/whale-transfers",
"description": "",
"maxAmountRequired": "6000",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "4ZHcGaij9ktYqm9dNvMSMLsbT5D7BUrXDEzQGVH5h3Q6"
},
"payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://api.vextorium.com/v1/whale-transfers",
"description": "",
"maxAmountRequired": "6000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact",
"network": "eip155:137",
"mimeType": "application/json",
"resource": "https://api.vextorium.com/v1/whale-transfers",
"description": "",
"maxAmountRequired": "6000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact",
"network": "eip155:10",
"mimeType": "application/json",
"resource": "https://api.vextorium.com/v1/whale-transfers",
"description": "",
"maxAmountRequired": "6000",
"maxTimeoutSeconds": 604900
},
{
"asset": "0x3600000000000000000000000000000000000000",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://api.vextorium.com/v1/whale-transfers",
"description": "",
"maxAmountRequired": "6000",
"maxTimeoutSeconds": 604900
}
]Provenance
- Seen in the source catalog
- 2026-10-12 23:07Z
- Last indexed by Roundhouse
- 2026-10-15 12:15Z
- Last enriched (probe, favicon, geo)
- 2026-10-15 12:45Z
- x402 version
- 1
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 9 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.vextorium.com and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.vextorium.com' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.vextorium.com/v1/whale-transfers, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.