ident.halowerk.com
Validates a UserOperation structurally and against chain state. It computes the required prefund from the gas limits and fee fields, reads the sender deposit on the EntryPoint and, when a paymaster is set, that paymaster deposit and stake, and says plainly whether the operation is funded. The nonce is read from the EntryPoint and compared with the one supplied, so a stale nonce is caught before submission.
InfraLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$11.47
Verified settled volume
2,654 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-11 10:41Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5EThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
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.
{
"docs": "https://ident.halowerk.com/llms.txt",
"name": "aa_simulate",
"error": "payment_required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"pricing": "https://ident.halowerk.com/pricing",
"resource": {
"url": "https://ident.halowerk.com/v1/aa-simulate",
"mimeType": "application/json",
"description": "Validates a UserOperation structurally and against chain state. It computes the required prefund from the gas limits and fee fields, reads the sender deposit on the EntryPoint and, when a paymaster is set, that paymaster deposit and stake, and says plainly whether the operation is funded. The nonce is read from the EntryPoint and compared with the one supplied, so a stale nonce is caught before submission."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"user_operation": {
"nonce": "beispiel",
"sender": "beispiel",
"callData": "beispiel"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"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": [
"user_operation"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "base",
"description": "Which chain to check against."
},
"entry_point": {
"type": "string",
"maxLength": 64,
"description": "EntryPoint address. Defaults to v0.7."
},
"simulate_call": {
"type": "boolean",
"default": true,
"description": "Execute the inner call with eth_call to surface a revert."
},
"user_operation": {
"type": "object",
"properties": {
"nonce": {
"type": "string",
"description": "Nonce as hex or decimal."
},
"sender": {
"type": "string",
"description": "Smart account address."
},
"factory": {
"type": "string"
},
"callData": {
"type": "string",
"description": "The call the account should make."
},
"initCode": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the factory."
},
"paymaster": {
"type": "string",
"description": "Paymaster address, v0.7 style."
},
"callGasLimit": {
"type": "string"
},
"maxFeePerGas": {
"type": "string"
},
"paymasterAndData": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the paymaster."
},
"preVerificationGas": {
"type": "string"
},
"maxPriorityFeePerGas": {
"type": "string"
},
"verificationGasLimit": {
"type": "string"
}
},
"description": "The UserOperation. EntryPoint v0.7 field names; v0.6 style is accepted and mapped."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
},
"price_usdc": "0.005",
"description": "Validates a UserOperation structurally and against chain state. It computes the required prefund from the gas limits and fee fields, reads the sender deposit on the EntryPoint and, when a paymaster is set, that paymaster deposit and stake, and says plainly whether the operation is funded. The nonce is read from the EntryPoint and compared with the one supplied, so a stale nonce is caught before submission. The inner call is executed with eth_call from the sender address, and a revert is decoded into Error(string), a named Panic code, or a custom error selector rather than returned as raw hex. This is not bundler validation: a bundler additionally enforces ERC-7562 storage-access rules that cannot be reproduced without a tracing node, so an operation that passes here can still be rejected. Nothing is submitted.",
"inputSchema": {
"type": "object",
"required": [
"user_operation"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "base",
"description": "Which chain to check against."
},
"entry_point": {
"type": "string",
"maxLength": 64,
"description": "EntryPoint address. Defaults to v0.7."
},
"simulate_call": {
"type": "boolean",
"default": true,
"description": "Execute the inner call with eth_call to surface a revert."
},
"user_operation": {
"type": "object",
"properties": {
"nonce": {
"type": "string",
"description": "Nonce as hex or decimal."
},
"sender": {
"type": "string",
"description": "Smart account address."
},
"factory": {
"type": "string"
},
"callData": {
"type": "string",
"description": "The call the account should make."
},
"initCode": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the factory."
},
"paymaster": {
"type": "string",
"description": "Paymaster address, v0.7 style."
},
"callGasLimit": {
"type": "string"
},
"maxFeePerGas": {
"type": "string"
},
"paymasterAndData": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the paymaster."
},
"preVerificationGas": {
"type": "string"
},
"maxPriorityFeePerGas": {
"type": "string"
},
"verificationGasLimit": {
"type": "string"
}
},
"description": "The UserOperation. EntryPoint v0.7 field names; v0.6 style is accepted and mapped."
}
},
"additionalProperties": false
},
"price_model": "per_call",
"x402Version": 2,
"instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
"payment_header": "PAYMENT-SIGNATURE",
"capability_request": {
"url": "https://bedarf.halowerk.com/capabilities/request",
"cost": "free",
"method": "POST",
"description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
"body_example": {
"max_price": 0.01,
"description": "what exactly is needed",
"requested_capability": "short label"
}
}
}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≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.
- Paid to
- 0x2880…C4E5E
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"asset": "USDC",
"version": "2",
"eip712Domain": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"network_name": "Base Mainnet",
"assetTransferMethod": "eip3009"
},
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"user_operation": {
"nonce": "beispiel",
"sender": "beispiel",
"callData": "beispiel"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
},
"schema": {
"type": "object",
"$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": [
"user_operation"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base"
],
"type": "string",
"default": "base",
"description": "Which chain to check against."
},
"entry_point": {
"type": "string",
"maxLength": 64,
"description": "EntryPoint address. Defaults to v0.7."
},
"simulate_call": {
"type": "boolean",
"default": true,
"description": "Execute the inner call with eth_call to surface a revert."
},
"user_operation": {
"type": "object",
"properties": {
"nonce": {
"type": "string",
"description": "Nonce as hex or decimal."
},
"sender": {
"type": "string",
"description": "Smart account address."
},
"factory": {
"type": "string"
},
"callData": {
"type": "string",
"description": "The call the account should make."
},
"initCode": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the factory."
},
"paymaster": {
"type": "string",
"description": "Paymaster address, v0.7 style."
},
"callGasLimit": {
"type": "string"
},
"maxFeePerGas": {
"type": "string"
},
"paymasterAndData": {
"type": "string",
"description": "v0.6 style; the first 20 bytes are read as the paymaster."
},
"preVerificationGas": {
"type": "string"
},
"maxPriorityFeePerGas": {
"type": "string"
},
"verificationGasLimit": {
"type": "string"
}
},
"description": "The UserOperation. EntryPoint v0.7 field names; v0.6 style is accepted and mapped."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-11 10:41Z
- Last indexed by Roundhouse
- 2026-09-10 10:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 06:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 400
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. 18 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 ident.halowerk.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=ident.halowerk.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://ident.halowerk.com/v1/aa-simulate, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.