Base Token Check by LIN Desk
Pay-per-call API for AI agents: turn any public web page or PDF into clean, LLM-ready Markdown. $0.002 per call in USDC on Base via x402. No API key, no signup.
InfraLiveeip155:8453Exactvia cdp
Baseerc20TokenProxyOwner
Calls · 30d
3↑ 31%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.
$0.03
Verified settled volume
17 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0030
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-17 05:18Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4b8AD7fFc8CD960f696059041132339386c28831The 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": "0x4b8AD7fFc8CD960f696059041132339386c28831",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://lin-desk-x402.lindesk.workers.dev/v1/base/token",
"description": "Use when an agent needs a quick ERC-20 contract check on Base before trading or accepting a token: name/symbol/decimals/total supply, owner and whether ownership is renounced, EIP-1967 / legacy proxy (upgradeable) detection, flags. $0.003 per call, USDC on Base (x402). Read-only; not security advice. Non-contract addresses and upstream errors are not charged.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"output": {
"type": "json",
"example": {
"name": "USD Coin",
"as_of": 1791020283,
"chain": "base",
"erc20": true,
"flags": [
"upgradeable_proxy_zeppelinos",
"has_owner"
],
"owner": "0x3abd6f64a422225e61e435bae41db12096106df7",
"proxy": {
"eip1967_admin": null,
"eip1967_implementation": null,
"zeppelinos_implementation": "0x2ce6311ddae708829bc0784c967b7d77d19fd779"
},
"cached": false,
"symbol": "USDC",
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"chain_id": 8453,
"decimals": 6,
"is_contract": true,
"block_number": 52115468,
"total_supply": "4372296189.660356",
"bytecode_bytes": 1852,
"total_supply_raw": "4372296189660356",
"ownership_renounced": false
}
}
},
"maxAmountRequired": "3000",
"maxTimeoutSeconds": 300
}
],
"charged": false,
"resource": {
"url": "https://lin-desk-x402.lindesk.workers.dev/v1/base/token",
"tags": [
"base",
"erc20",
"token",
"proxy",
"owner",
"onchain",
"due-diligence",
"ai-agents"
],
"mimeType": "application/json",
"description": "Use when an agent needs a quick ERC-20 contract check on Base before trading or accepting a token: name/symbol/decimals/total supply, owner and whether ownership is renounced, EIP-1967 / legacy proxy (upgradeable) detection, flags. $0.003 per call, USDC on Base (x402). Read-only; not security advice. Non-contract addresses and upstream errors are not charged.",
"serviceName": "Base Token Check by LIN Desk"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"output": {
"type": "json",
"example": {
"name": "USD Coin",
"as_of": 1791020283,
"chain": "base",
"erc20": true,
"flags": [
"upgradeable_proxy_zeppelinos",
"has_owner"
],
"owner": "0x3abd6f64a422225e61e435bae41db12096106df7",
"proxy": {
"eip1967_admin": null,
"eip1967_implementation": null,
"zeppelinos_implementation": "0x2ce6311ddae708829bc0784c967b7d77d19fd779"
},
"cached": false,
"symbol": "USDC",
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"chain_id": 8453,
"decimals": 6,
"is_contract": true,
"block_number": 52115468,
"total_supply": "4372296189.660356",
"bytecode_bytes": 1852,
"total_supply_raw": "4372296189660356",
"ownership_renounced": false
}
}
},
"schema": {
"type": "object",
"$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": [
"address"
],
"properties": {
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "ERC-20 contract address on Base mainnet"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"name": {
"type": [
"string",
"null"
]
},
"erc20": {
"type": "boolean"
},
"flags": {
"type": "array"
},
"owner": {
"type": [
"string",
"null"
]
},
"proxy": {
"type": "object"
},
"symbol": {
"type": [
"string",
"null"
]
},
"address": {
"type": "string"
},
"decimals": {
"type": [
"integer",
"null"
]
},
"total_supply": {
"type": [
"string",
"null"
]
},
"ownership_renounced": {
"type": [
"boolean",
"null"
]
}
}
}
}
}
}
}
}
},
"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.
0.003USDC≈ $0.003 USD
on Base · exact scheme
Pay 0.003 USDC on Base to 0x4b8A…28831. The signed payment is good for 5 minutes.
- Paid to
- 0x4b8A…28831
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 3000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x4b8AD7fFc8CD960f696059041132339386c28831",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"output": {
"type": "json",
"example": {
"name": "USD Coin",
"as_of": 1791020283,
"chain": "base",
"erc20": true,
"flags": [
"upgradeable_proxy_zeppelinos",
"has_owner"
],
"owner": "0x3abd6f64a422225e61e435bae41db12096106df7",
"proxy": {
"eip1967_admin": null,
"eip1967_implementation": null,
"zeppelinos_implementation": "0x2ce6311ddae708829bc0784c967b7d77d19fd779"
},
"cached": false,
"symbol": "USDC",
"address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"chain_id": 8453,
"decimals": 6,
"is_contract": true,
"block_number": 52115468,
"total_supply": "4372296189.660356",
"bytecode_bytes": 1852,
"total_supply_raw": "4372296189660356",
"ownership_renounced": false
}
}
},
"schema": {
"type": "object",
"$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": [
"address"
],
"properties": {
"address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "ERC-20 contract address on Base mainnet"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"name": {
"type": [
"string",
"null"
]
},
"erc20": {
"type": "boolean"
},
"flags": {
"type": "array"
},
"owner": {
"type": [
"string",
"null"
]
},
"proxy": {
"type": "object"
},
"symbol": {
"type": [
"string",
"null"
]
},
"address": {
"type": "string"
},
"decimals": {
"type": [
"integer",
"null"
]
},
"total_supply": {
"type": [
"string",
"null"
]
},
"ownership_renounced": {
"type": [
"boolean",
"null"
]
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-17 05:18Z
- Last indexed by Roundhouse
- 2026-10-20 07:00Z
- Last enriched (probe, favicon, geo)
- 2026-10-03 11:15Z
- 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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 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 Base Token Check by LIN Desk 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=Base%20Token%20Check%20by%20LIN%20Desk' 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://lin-desk-x402.lindesk.workers.dev/v1/base/token, 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.