presign-guard
Wallet approval audit (green/orange/red, grade, one-line summary): every open ERC-20 allowance of an EVM wallet with who the spender is (flagged, plain wallet, unverified, unlimited) and which ones to revoke. Bulk: 100 checks for $0.80 via /v1/credits.
Offering
- Provider
- presign-guard.fizzl.eu
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Blockchain And Crypto
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://presign-guard.fizzl.eu/v1/approvals- MIME type
- application/json
- First seen
- 2026-10-16T01:50:38.788Z
- Last seen
- Tags
- wallet-security, approvals, revoke, Agents
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact - Payment option 2
- 0.02 USDC
Atomic price: 20000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact - Payment option 3
- 20000 atomic units
Atomic price: 20000 · Network: algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k · Asset: 31566704 · Scheme: exact - Payment option 4
- 200000 atomic units
Atomic price: 200000 · Network: stellar:pubnet · Asset: CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75 · Scheme: exact - Payment option 5
- 20000 atomic units
Atomic price: 20000 · Network: eip155:196 · Asset: 0x779ded0c9e1022225f8e0630b35a9b54be713736 · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "20000",
"payTo": "0x6B0F4651eD42893ab58139938175E4a69f175F25"
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "20000",
"payTo": "ATWJ82T8nRdQwZnaysB68N5EpaSvLRsQP4h6eWmaJBH9"
},
{
"scheme": "exact",
"network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k",
"asset": "31566704",
"amount": "20000",
"payTo": "LOYVFSQ6ZTS2YWUW4GQ5L6VPP2TPIOXWYDACK53CPOHQQHLDMEMKJDXAX4"
},
{
"scheme": "exact",
"network": "stellar:pubnet",
"asset": "CCW67TSZV3SSS2HXMBQ5JFGCKJNXKZM7UQUWUZPUTHXSTZLEO7SJMI75",
"amount": "200000",
"payTo": "GCH2J5UAY24YNKA65MPAATVKWRCZZRZNF3JZKYYS5MIBZPG6U7WJ6CDQ"
},
{
"scheme": "exact",
"network": "eip155:196",
"asset": "0x779ded0c9e1022225f8e0630b35a9b54be713736",
"amount": "20000",
"payTo": "0x6B0F4651eD42893ab58139938175E4a69f175F25"
}
]Observed health
- Status
- Healthy
- Latest latency
- 163 ms
- Average latency
- 379 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 8 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"queryParams": {
"type": "object",
"properties": {
"chain": {
"type": "string",
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon",
"bsc",
"solana"
],
"description": "Chain to audit: an EVM chain (ERC-20 allowances) or solana (SPL token delegations)"
},
"address": {
"type": "string",
"description": "Wallet address (0x... on EVM, base58 on Solana)"
}
},
"required": [
"chain",
"address"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"address": {
"description": "Wallet address (0x... on EVM, base58 on Solana)",
"type": "string"
},
"chain": {
"description": "Chain to audit: an EVM chain (ERC-20 allowances) or solana (SPL token delegations)",
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon",
"bsc",
"solana"
],
"type": "string"
}
},
"required": [
"chain",
"address"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"approvals": {
"description": "Per allowance: token, spender (address, name, trusted, contract), amount, approvedAt, severity, codes, revoke; on Solana also tokenAccount (where to revoke), program and balance",
"items": {
"type": "object"
},
"type": "array"
},
"checkedAt": {
"type": "string"
},
"grade": {
"enum": [
"SAFE",
"CAUTION",
"RISKY",
"AVOID"
],
"type": "string"
},
"one_liner": {
"type": "string"
},
"permanentDelegates": {
"description": "Solana: Token-2022 tokens held whose mint has a permanent delegate (mint, delegate, tokenAccount); can't be revoked",
"items": {
"type": "object"
},
"type": "array"
},
"reasons": {
"items": {
"properties": {
"code": {
"type": "string"
},
"details": {},
"severity": {
"enum": [
"red",
"orange",
"info"
],
"type": "string"
}
},
"required": [
"code",
"severity"
],
"type": "object"
},
"type": "array"
},
"receipt": {
"description": "Signature over this whole answer (without receipt.signature), so the verdict can be verified later: EIP-191 personal_sign over canonical JSON (sorted keys, compact, ASCII-escaped). Signer addresses: /.well-known/presign-guard-signer.json; free check: POST /v1/verify.",
"properties": {
"algorithm": {
"enum": [
"eip191-canonical-json-v1"
],
"type": "string"
},
"cert": {
"description": "The payout wallet's certificate for this signing key: personal_sign by authority over 'fizzl receipt signer\\nservice: <service>\\nsigner: <signer>\\nvalid_from: <date>'. Pin the payout wallet and a rotated key still verifies.",
"properties": {
"authority": {
"type": "string"
},
"service": {
"type": "string"
},
"signature": {
"type": "string"
},
"signer": {
"type": "string"
},
"valid_from": {
"type": "string"
}
},
"type": "object"
},
"input_sha256": {
"description": "sha256 of canonical JSON {route, input}: your body (POST) or query parameters (GET)",
"type": "string"
},
"payment": {
"description": "The payment behind this answer, from your x402 payment payload. EVM: payer + EIP-3009 nonce; find the settlement as AuthorizationUsed(payer, nonce) on the asset contract. Solana: payer + sha256 of the signed transaction you sent.",
"properties": {
"amount": {
"type": "string"
},
"asset": {
"type": "string"
},
"network": {
"type": "string"
},
"nonce": {
"type": "string"
},
"pay_to": {
"type": "string"
},
"payer": {
"type": "string"
},
"proof": {
"enum": [
"eip3009",
"svm-transaction"
],
"type": "string"
},
"transaction_sha256": {
"type": "string"
}
},
"type": "object"
},
"request_id": {
"type": "string"
},
"route": {
"type": "string"
},
"signature": {
"type": "string"
},
"signed_at": {
"type": "string"
},
"signer": {
"type": "string"
}
},
"required": [
"request_id",
"route",
"input_sha256",
"signed_at",
"signer",
"algorithm",
"signature"
],
"type": "object"
},
"revokeUrl": {
"description": "revoke.cash link (EVM); null on Solana, see revokeHint",
"type": [
"string",
"null"
]
},
"summary": {
"description": "approvals, tokens, unlimited, toRevoke (on Solana also tokenAccounts)",
"type": "object"
},
"verdict": {
"enum": [
"green",
"orange",
"red"
],
"type": "string"
}
},
"required": [
"verdict",
"grade",
"one_liner",
"reasons",
"approvals"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}