paygent
Machine-enforceable safety verdicts for AI agents over x402. Guard prompt injection, unsafe tool calls, risky signatures - pay per call, no signup.
TradingLiveeip155:8453Exactvia wellknown:paygent.obsmetrics.com
Transaction-safetyWallet-securityPre-signApprovalDrainer-protectioneip712Securityx402
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$5.06
Verified settled volume
6 settlements proven x402 by their on-chain EIP-3009 marker.
$2.00
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
0x9bd29d8259Ac33Dc4d78D22ABF547eF2e518e2a5The 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.
{
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x9bd29d8259Ac33Dc4d78D22ABF547eF2e518e2a5",
"amount": "2000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
],
"resource": {
"url": "https://paygent.obsmetrics.com/agents/sign-guard/run",
"tags": [
"transaction-safety",
"wallet-security",
"pre-sign",
"approval",
"drainer-protection",
"eip712",
"security",
"x402"
],
"mimeType": "application/json",
"description": "Pre-sign safety oracle for agent wallets: submit the transaction or EIP-712 message you are about to sign and get a machine-enforceable verdict. Decodes the calldata/typed-data, flags the drainer toolkit (unlimited approvals, setApprovalForAll, permit/permit2 + EIP-3009 to an unexpected party, transferFrom draining an unnamed account, ownership transfer, raw ETH to a stranger), and binds the decoded action to your stated intent - only a fully pinned, clean action is auto-sign-safe. Fails closed: an undecodable on-chain call is cautioned and an unrecognized off-chain signature grant is blocked. Deterministic, sub-second, no endpoint fetch. It vouches that the action matches what you said; it does NOT vouch that a counterparty is trustworthy.",
"serviceName": "paygent"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"tx": {
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"data": "0x095ea7b3000000000000000000000000deadbeefdeadbeefdeadbeefdeadbeefdeadbeefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"value": "0",
"chainId": 8453
},
"expected": {
"chainId": 8453,
"spender": "0x1111111111111111111111111111111111111111"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"action": {
"kind": "erc20_approve",
"chainId": 8453,
"standard": "evm-tx",
"amountUnlimited": true
},
"advisory": "BLOCK: grants an effectively unlimited allowance; spender mismatch.",
"coverage": 1,
"findings": [
"grants an effectively unlimited allowance",
"spender 0xdead... != expected 0x1111..."
],
"trustScore": 10,
"autoSignSafe": false,
"schemaVersion": "1.0",
"recommendation": "block",
"scoredFingerprint": "sha256:..."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"properties": {
"tx": {
"type": "object",
"properties": {
"to": {
"type": "string",
"description": "Target contract / recipient (0x address)."
},
"data": {
"type": "string",
"description": "Calldata hex (0x...). Omit for a plain ETH transfer."
},
"value": {
"type": "string",
"description": "Wei to send, decimal or 0x."
},
"chainId": {
"type": "number",
"description": "EIP-155 chain id (e.g. 8453 for Base)."
}
},
"description": "An EVM transaction you are about to sign."
},
"context": {
"type": "string",
"description": "Optional free-form context."
},
"expected": {
"type": "object",
"properties": {
"from": {
"type": "string",
"description": "Account whose funds you intend to move (transferFrom / EIP-3009)."
},
"asset": {
"type": "string",
"description": "Token contract you intend to touch."
},
"chainId": {
"type": "number",
"description": "Chain you intend to act on."
},
"spender": {
"type": "string",
"description": "Address you intend to approve."
},
"contract": {
"type": "string",
"description": "Contract you intend to call."
},
"maxAmount": {
"type": "string",
"description": "Atomic ceiling you intend to expose (required to auto-sign an allowance)."
},
"recipient": {
"type": "string",
"description": "Address you intend to send to."
}
},
"description": "Your stated intent. Supplying it lets the verdict BIND the action; only a fully bound, clean action is auto-sign-safe. For an allowance, you MUST supply maxAmount; for a transferFrom, supply `from`."
},
"typedData": {
"type": "object",
"description": "An EIP-712 message you are about to sign (the off-chain drainer surface: permit, Permit2, EIP-3009). { domain, types, primaryType, message }."
},
"spendPolicy": {
"type": "object",
"description": "Optional buyer spend policy (context only)."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"type": "string",
"const": "json"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"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.
2USDC≈ $2 USD
on Base · exact scheme
Pay 2 USDC on Base to 0x9bd2…8e2a5. The signed payment is good for 10 minutes.
- Paid to
- 0x9bd2…8e2a5
- USD Coin contract
- 0x8335…02913
- Payment window
- 10 minutes
- As published
- 2000000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x9bd29d8259Ac33Dc4d78D22ABF547eF2e518e2a5",
"amount": "2000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 600
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"tx": {
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"data": "0x095ea7b3000000000000000000000000deadbeefdeadbeefdeadbeefdeadbeefdeadbeefffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"value": "0",
"chainId": 8453
},
"expected": {
"chainId": 8453,
"spender": "0x1111111111111111111111111111111111111111"
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"action": {
"kind": "erc20_approve",
"chainId": 8453,
"standard": "evm-tx",
"amountUnlimited": true
},
"advisory": "BLOCK: grants an effectively unlimited allowance; spender mismatch.",
"coverage": 1,
"findings": [
"grants an effectively unlimited allowance",
"spender 0xdead... != expected 0x1111..."
],
"trustScore": 10,
"autoSignSafe": false,
"schemaVersion": "1.0",
"recommendation": "block",
"scoredFingerprint": "sha256:..."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"properties": {
"tx": {
"type": "object",
"properties": {
"to": {
"type": "string",
"description": "Target contract / recipient (0x address)."
},
"data": {
"type": "string",
"description": "Calldata hex (0x...). Omit for a plain ETH transfer."
},
"value": {
"type": "string",
"description": "Wei to send, decimal or 0x."
},
"chainId": {
"type": "number",
"description": "EIP-155 chain id (e.g. 8453 for Base)."
}
},
"description": "An EVM transaction you are about to sign."
},
"context": {
"type": "string",
"description": "Optional free-form context."
},
"expected": {
"type": "object",
"properties": {
"from": {
"type": "string",
"description": "Account whose funds you intend to move (transferFrom / EIP-3009)."
},
"asset": {
"type": "string",
"description": "Token contract you intend to touch."
},
"chainId": {
"type": "number",
"description": "Chain you intend to act on."
},
"spender": {
"type": "string",
"description": "Address you intend to approve."
},
"contract": {
"type": "string",
"description": "Contract you intend to call."
},
"maxAmount": {
"type": "string",
"description": "Atomic ceiling you intend to expose (required to auto-sign an allowance)."
},
"recipient": {
"type": "string",
"description": "Address you intend to send to."
}
},
"description": "Your stated intent. Supplying it lets the verdict BIND the action; only a fully bound, clean action is auto-sign-safe. For an allowance, you MUST supply maxAmount; for a transferFrom, supply `from`."
},
"typedData": {
"type": "object",
"description": "An EIP-712 message you are about to sign (the off-chain drainer surface: permit, Permit2, EIP-3009). { domain, types, primaryType, message }."
},
"spendPolicy": {
"type": "object",
"description": "Optional buyer spend policy (context only)."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"type": "string",
"const": "json"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- —
- Last indexed by Roundhouse
- 2026-09-20 12:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 12:45Z
- x402 version
- 2
- Max timeout
- 600s
- 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
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service paygent 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=paygent' 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://paygent.obsmetrics.com/agents/sign-guard/run, 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.