Xerxes
Returns a grade (BASED/MID/COOKED/RADIOACTIVE) based on the contract's own state: code size, name, symbol, decimals, supply, owner(), proxy slots. Returns: grade (BASED/MID/COOKED/RADIOACTIVE, a stated rule over the contract's own state), a one-liner and a roast, and the facts read: code size, name, symbol, decimals, supply, owner(), proxy slots. It does not read holders, liquidity or price and makes no safety or legitimacy call. Query: token (token contract, 0x + 40 hex).
TradingLiveeip155:8453Exactvia cdp
VentureEthereumVerdict
Settlements · 30d
37
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.19
Verified settled volume
38 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-24 03:52Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xB799d3Be2F79021bD698F770bd809C296EE754a2The 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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0xB799…754a2. The signed payment is good for 5 minutes.
- Paid to
- 0xB799…754a2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xB799d3Be2F79021bD698F770bd809C296EE754a2",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"token": "0xdAC17F958D2ee523a2206206994597C13D831ec7"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"chain": "ethereum",
"method": "verdict",
"result": {
"facts": {
"owner": "0xc6cde7c39eb2f0f0095f41570af89efc2c1ea828",
"symbol": "USDT",
"decimals": 6,
"proxy_slot": null,
"upgradeable_proxy": false
},
"grade": "MID",
"roast": "A modestly sized contract with a live owner holding the keys. It's shaped like a standard token, but the owner's presence means central control remains a possibility.",
"token": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"one_liner": "USDT: ERC-20 with a live owner and no detected proxy.",
"disclaimer": "Entertainment, not financial advice. Reads the contract only: not holders, liquidity or price.",
"written_by": "model"
},
"service": "ethereum_contract_abi_service.token_verdict"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"token"
],
"properties": {
"token": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "token contract, 0x + 40 hex"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"ok",
"service"
],
"properties": {
"ok": {
"type": "boolean"
},
"chain": {
"type": "string"
},
"error": {
"type": "string",
"description": "present when ok is false"
},
"cached": {
"type": "boolean"
},
"method": {
"const": "verdict"
},
"result": {
"type": "object",
"required": [
"token",
"grade",
"one_liner",
"roast",
"written_by",
"facts"
],
"properties": {
"facts": {
"type": "object",
"description": "the contract state read: is_contract, code_bytes, name, symbol, decimals, total_supply, owner, owner_renounced, proxy_slot, proxy_implementation, proxy_slots_checked, erc20_shaped"
},
"grade": {
"enum": [
"BASED",
"MID",
"COOKED",
"RADIOACTIVE"
],
"description": "RADIOACTIVE: not a contract, or not ERC-20 shaped (no decimals/totalSupply). COOKED: a proxy implementation slot is set (EIP-1967, its beacon, or ZeppelinOS) AND owner() names a live owner. MID: either one. BASED: neither found."
},
"roast": {
"type": "string",
"maxLength": 220
},
"token": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$"
},
"one_liner": {
"type": "string",
"maxLength": 60
},
"disclaimer": {
"type": "string"
},
"grade_rule": {
"type": "string"
},
"written_by": {
"enum": [
"model",
"template"
]
}
}
},
"service": {
"type": "string"
}
}
}
}
}
}
}
},
"eip2612GasSponsoring": {
"info": {
"version": "1",
"description": "The facilitator accepts EIP-2612 gasless Permit to Permit2 canonical contract."
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"from",
"asset",
"spender",
"amount",
"nonce",
"deadline",
"signature",
"version"
],
"properties": {
"from": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The address of the sender."
},
"asset": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The address of the ERC-20 token contract."
},
"nonce": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "The current EIP-2612 nonce of the sender."
},
"amount": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "The amount to approve (uint256)."
},
"spender": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The address of the spender (Canonical Permit2)."
},
"version": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"description": "Schema version identifier."
},
"deadline": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "The timestamp at which the signature expires."
},
"signature": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]+$",
"description": "The 65-byte concatenated signature (r, s, v) as a hex string."
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-24 03:52Z
- Last indexed by Roundhouse
- 2026-09-25 10:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 00:45Z
- x402 version
- 2
- 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Xerxes 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=Xerxes' 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://ari001.tailb4ac3a.ts.net/v1/ventures/ethereum_contract_abi_service/token_verdict, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.