Tanod chainpeek
chainpeek (Tanod) Uniswap V3 swap quoted at up to five sizes: price impact per size, best fee tier and pool, and the gap to the latest DEX candle close, on Ethereum or Base. Use when an agent is about to swap and needs the price impact at several sizes before choosing one.
TradingLiveeip155:8453Exactvia cdp
ChainpeekChainPreTradeCheck
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 19 snapshots so far.
$4.72
Verified settled volume
640 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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.
2
Unique payers · 30d
Last called 2026-10-15 02:10Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x593857A4a4F619543ea12394137C3004ce841720The 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.
{
"error": "Payment required (USD 0.005 base price shown). This route takes POST with a JSON body (input schema in extensions.bazaar); the 402 of a POST quotes the exact price. Free tier (opt-in): 10 chain reads per IP per UTC day with header X-Tanod-Free: 1 (no payment needed). Charged only when the call returns an answer (HTTP 200); try a USD 0.001 test payment at POST /v1/x402/pay-test; terms: https://tanod.dev/payments/",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
},
"payTo": "RMk9k3VC8dr4hhjgFh88rGhjAbzfBzHxJJ5n2fTcqus",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d",
"extra": {
"name": "USD Coin",
"version": "2",
"assetTransferMethod": "permit2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000000000000000",
"scheme": "exact",
"network": "eip155:56",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 604900
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 604900
}
],
"resource": {
"url": "https://tanod.dev/v1/chain/pre-trade-check",
"tags": [
"chainpeek",
"chain",
"pre",
"trade",
"check"
],
"iconUrl": "https://tanod.dev/icon.png",
"mimeType": "application/json",
"description": "chainpeek (Tanod) Uniswap V3 swap quoted at up to five sizes: price impact per size, best fee tier and pool, and the gap to the latest DEX candle close, on Ethereum or Base. Use when an agent is about to swap and needs the price impact at several sizes before choosing one.",
"serviceName": "Tanod chainpeek"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"sizes": [
"1",
"10",
"100"
],
"token_in": "0x4200000000000000000000000000000000000006",
"token_out": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"dex": "uniswap_v3",
"note": "One Uniswap V3 QuoterV2 spot quote per size at the latest block (single pool, exact input, no gas or other venues included), so each row is an executable price at that size right now, not a firm price. price_impact_pct is (1 - effective_price / effective_price of the smallest size) x 100, the extra cost of size over the smallest size, not versus a market price. reference_gap_pct is the separate error between the smallest size's price and the latest DEX candle close.",
"block": 123,
"chain": "base",
"results": [
{
"pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
"fee_tier": 500,
"amount_in": "1",
"amount_out": "2560.1",
"gas_estimate": "90000",
"amount_in_raw": "1000000000000000000",
"amount_out_raw": "2560100000",
"effective_price": "2560.1",
"price_impact_pct": 0,
"initialized_ticks_crossed": 1
},
{
"pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
"fee_tier": 3000,
"amount_in": "10",
"amount_out": "25540",
"gas_estimate": "90000",
"amount_in_raw": "10000000000000000000",
"amount_out_raw": "25540000000",
"effective_price": "2554",
"price_impact_pct": 0.2383,
"initialized_ticks_crossed": 1
},
{
"pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
"fee_tier": 3000,
"amount_in": "100",
"amount_out": "253700",
"gas_estimate": "90000",
"amount_in_raw": "100000000000000000000",
"amount_out_raw": "253700000000",
"effective_price": "2537",
"price_impact_pct": 0.9023,
"initialized_ticks_crossed": 1
}
],
"token_in": {
"symbol": "WETH",
"address": "0x4200000000000000000000000000000000000006",
"decimals": 18
},
"reference": {
"note": "Prices are USDC per WETH. reference_gap_pct = (executable_price / candle_close - 1) x 100 for the smallest size. The candle is the latest 5-minute candle (still forming); 1-minute candles are not offered.",
"pair": "WETH/USDC",
"as_of": "2026-10-08T11:31:57Z",
"source": "Uniswap v3 swaps on Base (on-chain)",
"interval": "5m",
"available": true,
"candle_close": 2562.440508,
"candle_start": 1791459000,
"executable_price": 2560.1,
"reference_gap_pct": -0.0913,
"last_candle_partial": true
},
"token_out": {
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
},
"disclaimer": "On-chain spot quote from Uniswap V3 QuoterV2 at the latest block: one pool, exact input, no gas or other venues included. Not a firm price or an execution guarantee; it changes every block and can be manipulated, especially for illiquid pools. Do not use it as an oracle."
}
}
},
"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": [
"chain",
"token_in",
"token_out",
"sizes"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"description": "Chain to quote on (Uniswap V3): ethereum or base."
},
"sizes": {
"type": "array",
"items": {
"type": "string",
"pattern": "^(0|[1-9][0-9]{0,77})(\\.[0-9]{1,77})?$",
"maxLength": 160
},
"maxItems": 5,
"minItems": 1,
"description": "1 to 5 amounts of token_in as positive decimal strings in token_in units, e.g. [\"1\", \"10\", \"100\"]. Distinct; answered smallest first."
},
"token_in": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Token sold (0x + 40 hex)."
},
"fee_tiers": {
"anyOf": [
{
"type": "array",
"items": {
"enum": [
100,
500,
3000,
10000
],
"type": "integer"
},
"maxItems": 4,
"minItems": 1
},
{
"type": "null"
}
],
"default": null,
"description": "Uniswap V3 fee tiers to consider (100, 500, 3000, 10000). Default: all four."
},
"token_out": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Token bought (0x + 40 hex)."
}
},
"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",
"required": [
"chain",
"dex",
"token_in",
"token_out",
"results",
"reference",
"block",
"note",
"disclaimer"
],
"properties": {
"dex": {
"type": "string"
},
"note": {
"type": "string"
},
"block": {
"type": [
"integer",
"null"
]
},
"chain": {
"type": "string"
},
"results": {
"type": "array",
"items": {
"type": "object",
"required": [
"amount_in"
],
"properties": {
"pool": {
"type": "string"
},
"error": {
"type": "object",
"required": [
"code",
"message"
],
"properties": {
"code": {
"type": "string"
},
"message": {
"type": "string"
}
}
},
"fee_tier": {
"type": "integer"
},
"amount_in": {
"type": "string"
},
"amount_out": {
"type": "string"
},
"gas_estimate": {
"type": "string"
},
"amount_in_raw": {
"type": "string"
},
"amount_out_raw": {
"type": "string"
},
"effective_price": {
"type": [
"string",
"null"
]
},
"price_impact_pct": {
"type": [
"number",
"null"
]
},
"initialized_ticks_crossed": {
"type": "integer"
}
}
},
"maxItems": 5,
"minItems": 1
},
"token_in": {
"type": "object",
"properties": {
"symbol": {
"type": [
"string",
"null"
]
},
"address": {
"type": "string"
},
"decimals": {
"type": [
"integer",
"null"
]
}
}
},
"reference": {
"type": "object",
"required": [
"available"
],
"properties": {
"note": {
"type": "string"
},
"pair": {
"type": "string"
},
"as_of": {
"type": [
"string",
"null"
]
},
"reason": {
"type": "string"
},
"source": {
"type": "string"
},
"interval": {
"type": "string"
},
"available": {
"type": "boolean"
},
"candle_close": {
"type": "number"
},
"candle_start": {
"type": "integer"
},
"executable_price": {
"type": "number"
},
"reference_gap_pct": {
"type": "number"
},
"last_candle_partial": {
"type": [
"boolean",
"null"
]
}
}
},
"token_out": {
"type": "object",
"properties": {
"symbol": {
"type": [
"string",
"null"
]
},
"address": {
"type": "string"
},
"decimals": {
"type": [
"integer",
"null"
]
}
}
},
"disclaimer": {
"type": "string"
}
}
}
}
}
}
}
},
"builder-code": {
"info": {
"a": "bc_h7pxv14u"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"a": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "App builder code"
},
"s": {
"type": "array",
"items": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$"
},
"maxItems": 11,
"description": "Service builder codes"
},
"w": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "Wallet builder code"
}
},
"additionalProperties": false
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
},
"erc20ApprovalGasSponsoring": {
"info": {
"version": "1",
"description": "The facilitator accepts a raw signed approval transaction and will sponsor the gas fees."
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"from",
"asset",
"spender",
"amount",
"signedTransaction",
"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 ERC-20 token contract address to approve."
},
"amount": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Approval amount (uint256)."
},
"spender": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The address of the spender (Canonical Permit2)."
},
"version": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"description": "Schema version identifier."
},
"signedTransaction": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]+$",
"description": "RLP-encoded signed transaction calling ERC20.approve()."
}
}
}
}
},
"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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x5938…41720. The signed payment is good for 5 minutes.
- Paid to
- 0x5938…41720
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
5000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5938…41720
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
5000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- RMk9k3…Tcqus
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
5000000000000000units
on eip155:56 · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5938…41720
- Token contract
- 0x8AC7…d580d
- Payment window
- 5 minutes
5000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5938…41720
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x5938…41720. The signed payment is good for 168 hours.
- Paid to
- 0x5938…41720
- USD Coin contract
- 0x8335…02913
- Payment window
- 168 hours
- As published
- 5000 smallest units
5000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5938…41720
- Token contract
- 0x3c49…c3359
- Payment window
- 168 hours
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
},
"payTo": "RMk9k3VC8dr4hhjgFh88rGhjAbzfBzHxJJ5n2fTcqus",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d",
"extra": {
"name": "USD Coin",
"version": "2",
"assetTransferMethod": "permit2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000000000000000",
"scheme": "exact",
"network": "eip155:56",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 604900
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "GatewayWalletBatched",
"version": "1",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee"
},
"payTo": "0x593857A4a4F619543ea12394137C3004ce841720",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 604900
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"sizes": [
"1",
"10",
"100"
],
"token_in": "0x4200000000000000000000000000000000000006",
"token_out": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"dex": "uniswap_v3",
"note": "One Uniswap V3 QuoterV2 spot quote per size at the latest b…",
"block": 123,
"chain": "base",
"results": [
{
"pool": "0xd0b53D9277642d899DF5C87A3966A349A798F224",
"fee_tier": 500,
"amount_in": "1",
"amount_out": "2560.1",
"gas_estimate": "90000",
"amount_in_raw": "1000000000000000000",
"amount_out_raw": "2560100000",
"effective_price": "2560.1"
}
],
"token_in": {
"symbol": "WETH",
"address": "0x4200000000000000000000000000000000000006",
"decimals": 18
},
"reference": {
"pair": "WETH/USDC",
"as_of": "2026-10-08T11:31:57Z",
"interval": "5m",
"available": true,
"candle_close": 2562.440508,
"candle_start": 1791459000,
"executable_price": 2560.1,
"last_candle_partial": true
},
"token_out": {
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
},
"disclaimer": "On-chain spot quote from Uniswap V3 QuoterV2 at the latest…"
}
}
},
"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": [
"chain",
"token_in",
"token_out",
"sizes"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"description": "Chain to quote on (Uniswap V3): ethereum or base."
},
"sizes": {
"type": "array",
"items": {
"type": "string",
"pattern": "^(0|[1-9][0-9]{0,77})(\\.[0-9]{1,77})?$",
"maxLength": 160
},
"maxItems": 5,
"minItems": 1,
"description": "1 to 5 amounts of token_in as positive decimal strings in token_in units, e.g. [\"1\", \"10\", \"100\"]. Distinct; answered smallest first."
},
"token_in": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Token sold (0x + 40 hex)."
},
"fee_tiers": {
"anyOf": [
{
"type": "array",
"items": {
"enum": [
100,
500,
3000,
10000
],
"type": "integer"
},
"maxItems": 4,
"minItems": 1
},
{
"type": "null"
}
],
"default": null,
"description": "Uniswap V3 fee tiers to consider (100, 500, 3000, 10000). Default: all four."
},
"token_out": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Token bought (0x + 40 hex)."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"chain",
"dex",
"token_in",
"token_out",
"results",
"reference",
"block",
"note",
"disclaimer"
],
"properties": {
"dex": {
"type": "string"
},
"note": {
"type": "string"
},
"block": {
"type": [
"integer",
"null"
]
},
"chain": {
"type": "string"
},
"results": {
"type": "array"
},
"token_in": {
"type": "object"
},
"reference": {
"type": "object"
},
"token_out": {
"type": "object"
},
"disclaimer": {
"type": "string"
}
},
"description": "Abridged to fit the header. Full example: the 402 JSON body. Full schema: https://tanod.dev/openapi.json POST /v1/chain/pre-trade-check"
}
}
}
}
}
},
"builder-code": {
"info": {
"a": "bc_h7pxv14u"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"a": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "App builder code"
},
"s": {
"type": "array",
"items": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$"
},
"maxItems": 11,
"description": "Service builder codes"
},
"w": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "Wallet builder code"
}
},
"additionalProperties": false
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
},
"erc20ApprovalGasSponsoring": {
"info": {
"version": "1",
"description": "The facilitator accepts a raw signed approval transaction and will sponsor the gas fees."
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"from",
"asset",
"spender",
"amount",
"signedTransaction",
"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 ERC-20 token contract address to approve."
},
"amount": {
"type": "string",
"pattern": "^[0-9]+$",
"description": "Approval amount (uint256)."
},
"spender": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The address of the spender (Canonical Permit2)."
},
"version": {
"type": "string",
"pattern": "^[0-9]+(\\.[0-9]+)*$",
"description": "Schema version identifier."
},
"signedTransaction": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]+$",
"description": "RLP-encoded signed transaction calling ERC20.approve()."
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-15 02:10Z
- Last indexed by Roundhouse
- 2026-10-26 22:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-14 02:46Z
- 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. 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 Tanod chainpeek 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=Tanod%20chainpeek' 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://tanod.dev/v1/chain/pre-trade-check, 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.