TxSim Decoder
Eleven live x402 APIs for AI agents: web access, token safety, speech-to-text, chain data, SEO, search, email, video. Pay per call in USDC on Base, no API key.
DataLiveeip155:8453Exactvia cdp
CalldataAbi-decodeSecurityApprovalEvm
Calls · 30d
18↑ 95%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.
$10.61
Verified settled volume
1,431 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
18
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-23 07:35Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2The 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.
{
"trust": "https://cyberwarex.com/trust",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"catalog": {
"docs": "https://cyberwarex.com/llms.txt",
"services": "https://cyberwarex.com/.well-known/x402"
},
"resource": {
"url": "https://simulate.cyberwarex.com/decode",
"tags": [
"calldata",
"abi-decode",
"security",
"approval",
"evm"
],
"iconUrl": "https://cyberwarex.com/assets/icon.png",
"mimeType": "application/json",
"description": "Decode raw EVM calldata into a named function, signature and arguments, plus security risk flags (unlimited token approval, setApprovalForAll, ownership transfer, unknown selector, native value transfer). Keyless, deterministic, no simulation - the cheap way for an agent to understand and risk-screen a piece of calldata before signing.",
"serviceName": "TxSim Decoder"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"data": "0x095ea7b3000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
}
},
"output": {
"type": "json",
"example": {
"risk": {
"flags": [
{
"code": "unlimited_approval",
"detail": "approval amount is effectively unlimited",
"severity": "danger"
}
],
"level": "danger"
},
"decoded": {
"args": {
"amount": "115792089237316195423570985008687907853269984665640564039457584007913129639935",
"spender": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
},
"function": "approve",
"signature": "approve(address,uint256)"
},
"disclaimer": "Static decode + keyless eth_call preview only. This is not financial advice and not a guarantee: a call that would succeed now can still revert at broadcast time (state changes, slippage, MEV). Always verify before signing."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"data"
],
"properties": {
"to": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Target address (optional, for context only)."
},
"data": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]*$",
"description": "Transaction calldata (hex, 4-byte selector + ABI args)."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"risk": {
"type": "object",
"description": "level (none|caution|danger) + flags."
},
"decoded": {
"type": "object",
"description": "function, signature, args."
},
"disclaimer": {
"type": "string"
}
}
}
}
}
}
}
}
},
"free_trial": {
"how": "repeat this exact request with header `X-Free-Trial: 1` (or `?free_trial=1`) and no payment; you get the real result",
"terms": "per client IP per UTC day; automated monitors/crawlers/indexers are excluded; shared daily pool per service",
"endpoints": [
"decode"
],
"calls_per_ip_per_day": 3
},
"quickstart": {
"docs": "https://cyberwarex.com/llms.txt",
"node": "npm i x402-fetch viem | import {wrapFetchWithPayment} from 'x402-fetch'; import {privateKeyToAccount} from 'viem/accounts'; const f = wrapFetchWithPayment(fetch, privateKeyToAccount(PK)); const r = await f(URL)",
"python": "pip install x402 eth-account | from x402.clients.requests import x402_requests; from eth_account import Account; s = x402_requests(Account.from_key(PK)); r = s.get(URL)",
"pay_with": "USDC on Base (eip155:8453); `accepts[0].amount` is in 6-decimal units (3000 = $0.003)",
"prepaid_credits": "POST /subscribe {\"usd\": 5} on any cyberwarex host -> X-Subscription-Key (+10% bonus, one key works suite-wide, no per-call signing)"
},
"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.
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0x058D…921B2. The signed payment is good for 5 minutes.
- Paid to
- 0x058D…921B2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"data": "0x095ea7b3000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
}
},
"output": {
"type": "json",
"example": {
"risk": {
"flags": [
{
"code": "unlimited_approval",
"detail": "approval amount is effectively unlimited",
"severity": "danger"
}
],
"level": "danger"
},
"decoded": {
"args": {
"amount": "115792089237316195423570985008687907853269984665640564039457584007913129639935",
"spender": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
},
"function": "approve",
"signature": "approve(address,uint256)"
},
"disclaimer": "Static decode + keyless eth_call preview only. This is not financial advice and not a guarantee: a call that would succeed now can still revert at broadcast time (state changes, slippage, MEV). Always verify before signing."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"data"
],
"properties": {
"to": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Target address (optional, for context only)."
},
"data": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]*$",
"description": "Transaction calldata (hex, 4-byte selector + ABI args)."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"risk": {
"type": "object",
"description": "level (none|caution|danger) + flags."
},
"decoded": {
"type": "object",
"description": "function, signature, args."
},
"disclaimer": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-24 07:36Z
- Last indexed by Roundhouse
- 2026-09-24 10:40Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 06:15Z
- 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. 16 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 TxSim Decoder 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=TxSim%20Decoder' 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://simulate.cyberwarex.com/decode, 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.