assay.cascadiantech.com
Paid endpoints for AI agents over x402, settled in USDC on Base mainnet: new Base liquidity pools with measured facts, and multi-model claim verification.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Pay 0.02 USDC on Base to 0xe3fC…25Fba. The signed payment is good for 5 minutes.
- Paid to
- 0xe3fC…25Fba
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xe3fC2134f632FbacE50557509B8d055994B25Fba",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"dex": "Uniswap v4",
"flag": "no_base_asset"
}
},
"output": {
"type": "json",
"example": {
"pools": [],
"terms": "https://assay.cascadiantech.com/terms",
"missing": "stated in words when a measurement is absent",
"read_at": "2026-09-25T00:00:00+00:00",
"sources": []
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"dex": {
"enum": [
"Aerodrome",
"Aerodrome Slipstream",
"BaseSwap",
"PancakeSwap v2",
"PancakeSwap v3",
"Uniswap v2",
"Uniswap v3",
"Uniswap v4"
],
"type": "string",
"description": "only pools from this exchange"
},
"flag": {
"enum": [
"empty_pool",
"no_base_asset",
"token_code_appeared_in_window",
"token_has_owner",
"token_is_eip1967_proxy",
"v4_hook_present"
],
"type": "string",
"description": "only pools where this flag is true"
},
"cursor": {
"type": "string",
"pattern": "^[0-9]+:[0-9]+$",
"description": "next_cursor from the previous page (block:log_index)"
},
"not_flag": {
"enum": [
"empty_pool",
"no_base_asset",
"token_code_appeared_in_window",
"token_has_owner",
"token_is_eip1967_proxy",
"v4_hook_present"
],
"type": "string",
"description": "only pools where this flag is false (unknown excluded)"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-22 21:22Z
- Last indexed by Roundhouse
- 2026-10-26 17:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-26 19:15Z
- 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. 32 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 assay.cascadiantech.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=assay.cascadiantech.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://assay.cascadiantech.com/v1/pools/new, 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.