coord.taifoon.dev
No description published for this endpoint.
DataLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.
$1.87
Verified settled volume
218 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
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
0x3574999dd4c96eB73Bd6e11D4177010C83E14f5bThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"ok": false,
"code": "payment_required",
"hint": "pay 0.03 USDC with x402 on Base and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; the answer is graded against Taifoon's own chain read before you are charged, and a failed answer is not charged",
"x402": {
"error": "Payment Required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "30000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/data.onchain_query",
"description": "On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and grades the answer before you are charged. A failed answer is not charged. Answer + graded receipt. 0.03 USDC a call.",
"maxAmountRequired": "30000",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://coord.taifoon.dev/v1/x402/class/data.onchain_query",
"tags": [
"data",
"onchain",
"query"
],
"iconUrl": "https://www.taifoon.io/apple-touch-icon.png",
"mimeType": "application/json",
"description": "On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and grades the answer before you are charged. A failed answer is not charged. Answer + graded receipt. 0.03 USDC a call.",
"serviceName": "Taifoon"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"input": {
"pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
"chainId": 8453,
"question": "pool_tokens"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"sale": {
"id": "rs_…",
"payment_tx": "0x…",
"price_units": "30000",
"margin_units": "20000",
"seller_units": "10000"
},
"class": "data.onchain_query",
"grade": {
"ok": true,
"read": {
"source": "eth_call token0()/token1()/fee() over the Base rotation"
},
"checks": {
"no_error": true,
"fee_exact": true,
"answer_exact": true,
"data_present": true
}
},
"answer": {
"fee": 500,
"token0": "0x… (WETH)",
"token1": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913"
},
"receipt": {
"cache": {
"hit": false
},
"digest": "0x…",
"seller": "graphadvocate.com"
},
"subject": "0xd0b53d9277642d899df5c87a3966a349a798f224",
"chain_id": 8453,
"question": "pool_tokens"
}
}
},
"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": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"question",
"chainId"
],
"properties": {
"pool": {
"type": "string",
"description": "pool_tokens: a Uniswap V3 pool address"
},
"block": {
"type": "integer",
"description": "block_hash: a block number"
},
"chainId": {
"enum": [
8453
],
"type": "integer"
},
"question": {
"enum": [
"pool_tokens",
"block_hash"
],
"type": "string"
}
}
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"queryParams": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2,
"without_x402": {
"why": "x402 is settled on eip155:8453 (Base), eip155:42161 (Arbitrum One), eip155:5042 (Arc), eip155:4663 (Robinhood Chain), eip155:143 (Monad): pay the entry of the network you hold the dollar token on. A key with a balance is the other way to pay, the same price on any of them.",
"direct": {
"then": "send the same request with X-API-Key: it is paid from the balance at the same price",
"quote": "GET https://www.taifoon.io/v1/access/quote?usdc=1&chainId=<id> with X-API-Key (POST /v1/register for one), then POST /v1/access/topup { tx, signature, chainId }",
"chains": [
"eip155:8453 (Base, USDC)",
"eip155:42161 (Arbitrum One, USDC)",
"eip155:5042 (Arc, USDC)",
"eip155:4663 (Robinhood Chain, USDG)",
"eip155:143 (Monad, USDC)"
],
"for_a_person": "https://www.taifoon.io/pricing"
},
"settles_x402": [
"eip155:8453",
"eip155:42161",
"eip155:5042",
"eip155:4663",
"eip155:143"
]
}
},
"error": "one data.onchain_query answer is 0.03 USDC; it is graded against the chain before you are charged. Note: input.question must be one of pool_tokens, block_hash",
"terms": {
"per": "call",
"class": "data.onchain_query",
"chains": [
8453
],
"network": "eip155:8453",
"catalogue": "https://coord.taifoon.dev/v1/products (x402.per_call)",
"questions": [
"pool_tokens",
"block_hash"
],
"served_by": "an admitted outside data seller (graphadvocate.com), graded by Taifoon against its own chain read",
"price_usdc": 0.03,
"not_charged": "an answer that fails the grade (no_error, data_present, answer_exact) is not charged: the payment is never settled",
"price_units": "30000",
"cache_blocks": 1800
},
"next_step": {
"mcp": {
"tool": "taifoon_onchain_query",
"arguments": {
"chain": 8453,
"params": {
"pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224"
},
"question": "pool_tokens"
}
},
"why": "pay 0.03 USDC with x402 on Base and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; the answer is graded against Taifoon's own chain read before you are charged, and a failed answer is not charged",
"http": {
"url": "https://coord.taifoon.dev/v1/x402/class/data.onchain_query",
"body": {
"input": {
"pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
"chainId": 8453,
"question": "pool_tokens"
}
},
"header": "PAYMENT-SIGNATURE",
"method": "POST"
},
"price": {
"per": "call",
"chain": 8453,
"amount": "0.03",
"currency": "USDC"
},
"action": "retry",
"evaluator": "/v1/judge/evaluator"
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.03USDC≈ $0.03 USD
on Base · exact scheme
Pay 0.03 USDC on Base to 0x3574…14f5b. The signed payment is good for 5 minutes.
- Paid to
- 0x3574…14f5b
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 30000 smallest units
- Buys
- On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and gr…
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/data.onchain_query",
"description": "On-chain data query on Base, sold by Taifoon: the tokens and fee tier of a Uniswap V3 pool, or the hash of a block. An admitted data seller answers; Taifoon reads the same facts from the chain and gr…",
"maxAmountRequired": "30000",
"maxTimeoutSeconds": 300
}
]Provenance
- Seen in the source catalog
- 2026-10-12 08:49Z
- Last indexed by Roundhouse
- 2026-10-25 21:16Z
- Last enriched (probe, favicon, geo)
- 2026-10-15 16:45Z
- 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. 19 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 coord.taifoon.dev 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=coord.taifoon.dev' 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://coord.taifoon.dev/v1/x402/class/data.onchain_query, 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.