agentshelf.syntexa.ch
Call when an agent needs raw Base logs for one contract, with optional topic0-topic3, a capped block range, and an optional event signature for decoding. Public mainnet.base.org windows stay small and HTTP 429 is not billed. Read-only. Send JSON fields address (string), topic0 (string), event (string). Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/base-events first.
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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://agentshelf.syntexa.ch/v1/base-events",
"description": "Call when an agent needs raw Base logs for one contract, with optional topic0-topic3, a capped block range, and an optional event signature for decoding. Public mainnet.base.org windows stay small. Alchemy free-tier spans stay within 10 blocks. HTTP 429 is not billed. Read-only. Send JSON fields address (string), topic0 (string), event (string). Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/base-events first.",
"outputSchema": {
"info": {
"input": {
"body": {
"event": "Transfer(address indexed from, address indexed to, uint256 value)",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"logs": [
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
],
"billed": true,
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"to_block": 26246401,
"warnings": [],
"truncated": false,
"from_block": 26246376,
"receipt_id": "rcpt_01EXAMPLE000000000000000"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"examples": [
{
"event": "Transfer(address indexed from, address indexed to, uint256 value)",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"required": [
"address"
],
"properties": {
"event": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_]*\\([A-Za-z0-9_,\\s]*\\)$",
"examples": [
"Transfer(address indexed from, address indexed to, uint256 value)"
],
"maxLength": 300,
"description": "Optional Solidity event signature. Example: Transfer(address indexed from, address indexed to, uint256 value). topic0 defaults to its keccak. Arrays are not decoded."
},
"topic0": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"examples": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
],
"description": "First log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic1": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Second log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic2": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Third log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic3": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Fourth log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"address": {
"type": "string",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"description": "Contract on Base mainnet. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Circle USDC). Logs are filtered to this address. EIP-55 or all one case."
},
"to_block": {
"type": "string",
"description": "Last block, inclusive, or latest. On public Base the span is at most 16 blocks. With a configured BASE_RPC_URL, or on Ethereum, the span is at most 2000. Omit it to anchor the default window."
},
"from_block": {
"type": "string",
"pattern": "^(0|[1-9]\\d*)$",
"description": "First block, inclusive. On public Base the span is at most 16 blocks. With a configured BASE_RPC_URL, or on Ethereum, the span is at most 2000. Omit both bounds for the default recent window."
}
},
"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",
"examples": [
{
"ok": true,
"logs": [
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
],
"billed": true,
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"to_block": 26246401,
"warnings": [],
"truncated": false,
"from_block": 26246376,
"receipt_id": "rcpt_01EXAMPLE000000000000000"
}
],
"required": [
"ok",
"receipt_id",
"billed",
"network",
"address",
"from_block",
"to_block",
"truncated",
"logs"
],
"properties": {
"ok": {
"type": "boolean",
"const": true,
"examples": [
true
]
},
"logs": {
"type": "array",
"items": {
"type": "object",
"required": [
"address",
"topics",
"data",
"block_number",
"transaction_hash",
"log_index",
"decoded"
],
"properties": {
"data": {
"type": "string"
},
"topics": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 4
},
"address": {
"type": "string"
},
"decoded": {
"anyOf": [
{
"type": "object",
"required": [
"event",
"args"
],
"properties": {
"args": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"type",
"indexed",
"value"
],
"properties": {
"name": {
"type": "string"
},
"type": {
"enum": [
"address",
"uint256",
"int256",
"bool",
"bytes32",
"bytes4",
"string",
"bytes"
],
"type": "string"
},
"value": {
"type": "string"
},
"indexed": {
"type": "boolean"
}
},
"additionalProperties": false
},
"maxItems": 16
},
"event": {
"type": "string"
}
},
"additionalProperties": false
},
{
"type": "null"
}
]
},
"log_index": {
"type": "integer",
"minimum": 0
},
"block_number": {
"type": "integer",
"minimum": 0
},
"transaction_hash": {
"type": "string"
}
},
"additionalProperties": false
},
"examples": [
[
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
]
],
"maxItems": 50
},
"billed": {
"type": "boolean",
"examples": [
true
]
},
"address": {
"type": "string",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
]
},
"network": {
"type": "string",
"const": "eip155:8453",
"examples": [
"eip155:8453"
]
},
"to_block": {
"type": "integer",
"minimum": 0,
"examples": [
26246401
]
},
"warnings": {
"type": "array",
"items": {
"type": "string"
},
"default": [],
"examples": [
[]
]
},
"truncated": {
"type": "boolean",
"examples": [
false
]
},
"from_block": {
"type": "integer",
"minimum": 0,
"examples": [
26246376
]
},
"receipt_id": {
"type": "string",
"examples": [
"rcpt_01EXAMPLE000000000000000"
]
}
},
"additionalProperties": false
}
}
}
}
}
},
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
}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 0.005 USDC on Base to 0x1D61…55a38. The signed payment is good for 1 minute.
- Paid to
- 0x1D61…55a38
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"event": "Transfer(address indexed from, address indexed to, uint256 value)",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"logs": [
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
],
"billed": true,
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"to_block": 26246401,
"warnings": [],
"truncated": false,
"from_block": 26246376,
"receipt_id": "rcpt_01EXAMPLE000000000000000"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"examples": [
{
"event": "Transfer(address indexed from, address indexed to, uint256 value)",
"topic0": "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"required": [
"address"
],
"properties": {
"event": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_]*\\([A-Za-z0-9_,\\s]*\\)$",
"examples": [
"Transfer(address indexed from, address indexed to, uint256 value)"
],
"maxLength": 300,
"description": "Optional Solidity event signature. Example: Transfer(address indexed from, address indexed to, uint256 value). topic0 defaults to its keccak. Arrays are not decoded."
},
"topic0": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"examples": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
],
"description": "First log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic1": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Second log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic2": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Third log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"topic3": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "Fourth log topic, 32 bytes of hex. Example: 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef is ERC-20 Transfer. Omit it for a wildcard in that position."
},
"address": {
"type": "string",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"description": "Contract on Base mainnet. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Circle USDC). Logs are filtered to this address. EIP-55 or all one case."
},
"to_block": {
"type": "string",
"description": "Last block, inclusive, or latest. On public Base the span is at most 16 blocks. With a configured BASE_RPC_URL, or on Ethereum, the span is at most 2000. Omit it to anchor the default window."
},
"from_block": {
"type": "string",
"pattern": "^(0|[1-9]\\d*)$",
"description": "First block, inclusive. On public Base the span is at most 16 blocks. With a configured BASE_RPC_URL, or on Ethereum, the span is at most 2000. Omit both bounds for the default recent window."
}
},
"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",
"examples": [
{
"ok": true,
"logs": [
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
],
"billed": true,
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"to_block": 26246401,
"warnings": [],
"truncated": false,
"from_block": 26246376,
"receipt_id": "rcpt_01EXAMPLE000000000000000"
}
],
"required": [
"ok",
"receipt_id",
"billed",
"network",
"address",
"from_block",
"to_block",
"truncated",
"logs"
],
"properties": {
"ok": {
"type": "boolean",
"const": true,
"examples": [
true
]
},
"logs": {
"type": "array",
"items": {
"type": "object",
"required": [
"address",
"topics",
"data",
"block_number",
"transaction_hash",
"log_index",
"decoded"
],
"properties": {
"data": {
"type": "string"
},
"topics": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 4
},
"address": {
"type": "string"
},
"decoded": {
"anyOf": [
{
"type": "object",
"required": [
"event",
"args"
],
"properties": {
"args": {
"type": "array",
"items": {
"type": "object",
"required": [
"name",
"type",
"indexed",
"value"
],
"properties": {
"name": {
"type": "string"
},
"type": {
"enum": [
"address",
"uint256",
"int256",
"bool",
"bytes32",
"bytes4",
"string",
"bytes"
],
"type": "string"
},
"value": {
"type": "string"
},
"indexed": {
"type": "boolean"
}
},
"additionalProperties": false
},
"maxItems": 16
},
"event": {
"type": "string"
}
},
"additionalProperties": false
},
{
"type": "null"
}
]
},
"log_index": {
"type": "integer",
"minimum": 0
},
"block_number": {
"type": "integer",
"minimum": 0
},
"transaction_hash": {
"type": "string"
}
},
"additionalProperties": false
},
"examples": [
[
{
"data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"topics": [
"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
"0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
"0x000000000000000000000000833589fcd6edb6e08f4c7c32d4f71b54bda02913"
],
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decoded": {
"args": [
{
"name": "from",
"type": "address",
"value": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"indexed": true
},
{
"name": "to",
"type": "address",
"value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"indexed": true
},
{
"name": "value",
"type": "uint256",
"value": "1000000",
"indexed": false
}
],
"event": "Transfer"
},
"log_index": 12,
"block_number": 26246401,
"transaction_hash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}
]
],
"maxItems": 50
},
"billed": {
"type": "boolean",
"examples": [
true
]
},
"address": {
"type": "string",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
]
},
"network": {
"type": "string",
"const": "eip155:8453",
"examples": [
"eip155:8453"
]
},
"to_block": {
"type": "integer",
"minimum": 0,
"examples": [
26246401
]
},
"warnings": {
"type": "array",
"items": {
"type": "string"
},
"default": [],
"examples": [
[]
]
},
"truncated": {
"type": "boolean",
"examples": [
false
]
},
"from_block": {
"type": "integer",
"minimum": 0,
"examples": [
26246376
]
},
"receipt_id": {
"type": "string",
"examples": [
"rcpt_01EXAMPLE000000000000000"
]
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-22 09:31Z
- Last indexed by Roundhouse
- 2026-10-26 19:30Z
- Last enriched (probe, favicon, geo)
- 2026-10-22 10:16Z
- x402 version
- 2
- Max timeout
- 60s
- 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. 6 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 agentshelf.syntexa.ch 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=agentshelf.syntexa.ch' 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://agentshelf.syntexa.ch/v1/base-events, 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.