Servidor MCP
presign-guard
io.github.Fizzl13/presign-guard
Qué hace este MCP
Evaluates transaction signatures, token approvals, wallets, and blockchain tokens for malicious parties, unsafe allowances, scams, and other risk indicators.
Capacidades
Herramientas
7
herramientas
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Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['message'], 'properties': {'type': {'enum': ['bug', 'feature', 'other'], 'type': 'string', 'description': 'bug, feature (something missing) or other'}, 'contact': {'type': 'string', 'description': 'Optional: how to reach you about it'}, 'message': {'type': 'string', 'description': 'What happened or what you need'}, 'endpoint': {'type': 'string', 'description': 'Optional: the route or tool it is about, e.g. /v1/token'}}, 'additionalProperties': False}
presign_check
Pre-sign risk check ($0.01 via x402)
Paid ($0.01 USDC via x402 on Base): call this before you sign. Send the transaction, token approval or EIP-712 signature (Permit, Permit2, EIP-3009 x402 payment, Seaport) your agent is about to sign; get back green, orange or red with reason codes: who gets access, whether the spender or recipient is flagged, sanctioned (OFAC SDN) or unverified, unlimited allowances, and the token itself (honeypot, fake look-alike, high tax). Only proceed on green; on orange ask your user; never sign on red. Same as POST /v1/check. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['type', 'chainId'], 'properties': {'to': {'type': 'string', 'description': 'transaction: the target contract'}, 'data': {'type': 'string', 'description': 'transaction: 0x-prefixed calldata'}, 'type': {'enum': ['approval', 'transaction', 'signature'], 'type': 'string', 'description': 'What the agent is about to sign'}, 'token': {'type': 'string', 'description': 'approval: the token contract'}, 'value': {'type': 'string', 'description': 'transaction: native value in wei'}, 'amount': {'type': 'string', 'description': 'approval: amount in base units (0 = revoke)'}, 'origin': {'type': 'string', 'description': 'optional: the site asking for the signature or transaction (URL or hostname); a domain under 30 days old is orange'}, 'chainId': {'type': 'integer', 'description': 'EVM chain id: 1, 10, 56, 137, 8453, 42161 (8453 = Base)'}, 'spender': {'type': 'string', 'description': 'approval: who gets the allowance'}, 'typedData': {'anyOf': [{'type': 'object', 'additionalProperties': {}}, {'type': 'string'}], 'description': 'signature: the exact eth_signTypedData_v4 payload (Permit, Permit2, EIP-3009 x402 payment, Seaport)'}}, 'additionalProperties': False}
presign_check_explain
Pre-sign risk check with explanation ($0.03 via x402)
Paid ($0.03 USDC via x402 on Base): the same verdict and reason codes as presign_check, plus a 3 to 5 sentence plain-language explanation a person can read before approving (lang en or nl). Same as POST /v1/check/explain. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['type', 'chainId'], 'properties': {'to': {'type': 'string', 'description': 'transaction: the target contract'}, 'data': {'type': 'string', 'description': 'transaction: 0x-prefixed calldata'}, 'lang': {'enum': ['en', 'nl'], 'type': 'string', 'description': 'Language of the explanation (default en)'}, 'type': {'enum': ['approval', 'transaction', 'signature'], 'type': 'string', 'description': 'What the agent is about to sign'}, 'token': {'type': 'string', 'description': 'approval: the token contract'}, 'value': {'type': 'string', 'description': 'transaction: native value in wei'}, 'amount': {'type': 'string', 'description': 'approval: amount in base units (0 = revoke)'}, 'origin': {'type': 'string', 'description': 'optional: the site asking for the signature or transaction (URL or hostname); a domain under 30 days old is orange'}, 'chainId': {'type': 'integer', 'description': 'EVM chain id: 1, 10, 56, 137, 8453, 42161 (8453 = Base)'}, 'spender': {'type': 'string', 'description': 'approval: who gets the allowance'}, 'typedData': {'anyOf': [{'type': 'object', 'additionalProperties': {}}, {'type': 'string'}], 'description': 'signature: the exact eth_signTypedData_v4 payload (Permit, Permit2, EIP-3009 x402 payment, Seaport)'}}, 'additionalProperties': False}
presign_quick_check
Quick pre-sign verdict (free)
Free: the green/orange/red verdict only, for a transaction, token approval or EIP-712 signature your agent is about to sign. Limited to 10 calls per hour. For the reason codes and details use presign_check ($0.01); for a plain-language explanation presign_check_explain ($0.03).
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['type', 'chainId'], 'properties': {'to': {'type': 'string', 'description': 'transaction: the target contract'}, 'data': {'type': 'string', 'description': 'transaction: 0x-prefixed calldata'}, 'type': {'enum': ['approval', 'transaction', 'signature'], 'type': 'string', 'description': 'What the agent is about to sign'}, 'token': {'type': 'string', 'description': 'approval: the token contract'}, 'value': {'type': 'string', 'description': 'transaction: native value in wei'}, 'amount': {'type': 'string', 'description': 'approval: amount in base units (0 = revoke)'}, 'origin': {'type': 'string', 'description': 'optional: the site asking for the signature or transaction (URL or hostname); a domain under 30 days old is orange'}, 'chainId': {'type': 'integer', 'description': 'EVM chain id: 1, 10, 56, 137, 8453, 42161 (8453 = Base)'}, 'spender': {'type': 'string', 'description': 'approval: who gets the allowance'}, 'typedData': {'anyOf': [{'type': 'object', 'additionalProperties': {}}, {'type': 'string'}], 'description': 'signature: the exact eth_signTypedData_v4 payload (Permit, Permit2, EIP-3009 x402 payment, Seaport)'}}, 'additionalProperties': False}
token_quick_verdict
Quick token verdict (free)
Free: the green/orange/red verdict and grade only, for a Solana or EVM token your agent is about to buy, hold or accept. Limited to 10 free calls per hour (shared with presign_quick_check). For the reasons, one-line summary and market data use token_verdict ($0.01).
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['chain', 'address'], 'properties': {'chain': {'enum': ['solana', 'base', 'ethereum', 'arbitrum', 'optimism', 'polygon', 'bsc'], 'type': 'string', 'description': 'Chain the token lives on'}, 'address': {'type': 'string', 'description': 'Solana mint address (base58) or EVM token contract (0x...)'}}, 'additionalProperties': False}
token_verdict
Token verdict ($0.01 via x402)
Paid ($0.01 USDC via x402 on Base or Solana): call this before your agent buys, holds or accepts a token. Send the chain (solana, base, ethereum, arbitrum, optimism, polygon, bsc) and the token address or mint; get back green/orange/red, a grade (SAFE, CAUTION, RISKY, AVOID), reason codes (mint or freeze authority still active, honeypot, tax or transfer fee, LP not locked, low liquidity, new token, concentrated holders, rugged), a one-line summary, and market data (price, liquidity, market cap, 24h volume, age). Same as GET /v1/token. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['chain', 'address'], 'properties': {'chain': {'enum': ['solana', 'base', 'ethereum', 'arbitrum', 'optimism', 'polygon', 'bsc'], 'type': 'string', 'description': 'Chain the token lives on'}, 'address': {'type': 'string', 'description': 'Solana mint address (base58) or EVM token contract (0x...)'}}, 'additionalProperties': False}
wallet_approvals
Wallet approval audit ($0.02 via x402)
Paid ($0.02 USDC via x402 on Base or Solana): audit the open token approvals of an EVM wallet (base, ethereum, arbitrum, optimism, polygon, bsc), for example your agent's own wallet as a periodic check. Get back green/orange/red, a grade, a one-line summary and every ERC-20 allowance with its spender: flagged malicious (red), a plain wallet, on a doubt list, an unverified contract or an unlimited allowance to a spender not on the GoPlus trust list (orange), plus which ones to revoke and a revoke.cash link. NFT approvals are not covered. Same as GET /v1/approvals. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.
Solo lectura
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['chain', 'address'], 'properties': {'chain': {'enum': ['base', 'ethereum', 'arbitrum', 'optimism', 'polygon', 'bsc'], 'type': 'string', 'description': 'EVM chain to audit'}, 'address': {'type': 'string', 'description': 'Wallet address (0x...)'}}, 'additionalProperties': False}
Historial
Cambios recientes en herramientas
Añadido
feedback
29 de September de 2026 a las 02:48
Modificado
wallet_approvals
29 de September de 2026 a las 02:48
Modificado
token_verdict
29 de September de 2026 a las 02:48
Modificado
presign_check_explain
29 de September de 2026 a las 02:48
Modificado
presign_check
29 de September de 2026 a las 02:48
Añadido
wallet_approvals
27 de September de 2026 a las 02:40
Añadido
token_verdict
27 de September de 2026 a las 02:40
Añadido
presign_check_explain
27 de September de 2026 a las 02:40
Añadido
presign_check
27 de September de 2026 a las 02:40
Añadido
token_quick_verdict
27 de September de 2026 a las 02:40
Añadido
presign_quick_check
27 de September de 2026 a las 02:40
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