kair-os.trade
Compare four Uniswap V3 single-pool exact-input swap quotes on Base at one block (latest by default, finalized optional). Returns raw token amounts and QuoterV2 gas estimates. Gross output comparison; execution costs and net ranking remain unknown. Does not execute swaps.
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 0.01 USDC on Base to 0x2A40…DcA2F. The signed payment is good for 5 minutes.
- Paid to
- 0x2A40…DcA2F
- 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": "0x2A40C1E882e511e363Fb5EdA842Ac4Cb50cDcA2F",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"tokenIn": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amountIn": "1000000",
"blockTag": "latest",
"tokenOut": "0x4200000000000000000000000000000000000006"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"block": {
"tag": "latest",
"hash": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"number": "0x1"
},
"chain": "base",
"quotes": [
{
"fee": 100,
"status": "ok",
"amountOut": "400000000000000",
"gasEstimate": "90000"
}
],
"status": "ok",
"tokenIn": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"amountIn": "1000000",
"protocol": "uniswap_v3",
"tokenOut": "0x4200000000000000000000000000000000000006",
"bestGross": {
"fee": 100,
"amountOut": "400000000000000"
},
"netComparison": {
"status": "unknown"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"tokenIn",
"tokenOut",
"amountIn"
],
"properties": {
"tokenIn": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Nonzero Base token contract address; must differ from tokenOut."
},
"amountIn": {
"type": "string",
"pattern": "^[1-9][0-9]{0,38}$",
"description": "Raw input-token units as a positive decimal string, at most 340282366920938463463374607431768211455. Decimals are never inferred."
},
"blockTag": {
"enum": [
"latest",
"finalized"
],
"type": "string",
"default": "latest",
"description": "Block state to quote. Latest favors freshness; finalized favors finality."
},
"tokenOut": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Nonzero Base token contract address; must differ from tokenIn."
}
},
"additionalProperties": false
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 06:01Z
- Last indexed by Roundhouse
- 2026-10-26 17:30Z
- Last enriched (probe, favicon, geo)
- —
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- Not probed
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 kair-os.trade 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=kair-os.trade' 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://kair-os.trade/base-quotes/quote, 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.