FabTally Safe
Read-only crypto safety: token honeypot checks, EIP-712 signature decode, approval scans.
Should I use this
Quality & Safety
Findings (1)
- LOWTool 'simulate_free' description lacks action verbin simulate_free
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"crypto-safety": {
"url": "https://safe.fabtally.com/mcp"
}
}
}Remote endpoints
https://safe.fabtally.com/mcpstreamable-httpWhat it can do
Tool inventory
Tools (8)
🟢token_safety(address, chain, x_payment)
PAID $0.02 (x402, USDC on Base). Multi-chain token honeypot/rug check aggregating GoPlus token-security + honeypot.is buy/sell-tax simulation into a normalized 0-100 risk score with explainable reasons: honeypot/can't-sell, buy/sell tax, mint/blacklist/pausable/ownership privileges, top-holder concentration, LP-lock, contract verified/bytecode. Descriptive facts only — NOT a buy/sell signal. Without payment returns the x402 challenge; pass x_payment to settle. Free teaser: token_safety_free.
Input Schema
{
"type": "object",
"properties": {
"address": {
"type": "string",
"description": "0x token contract address."
},
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"required": [
"address",
"chain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪token_safety_free(address, chain)
FREE. Score band + top-line honeypot/tax/privilege flags for a token {address, chain}. Real result, no wallet. Upgrade to token_safety for the full numeric breakdown.
Input Schema
{
"type": "object",
"properties": {
"address": {
"type": "string",
"description": "0x token contract address."
},
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
}
},
"required": [
"address",
"chain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪decode_signature(typed_data, chain, x_payment)
PAID $0.01 (x402, USDC on Base). Decode an off-chain EIP-712 typed-data signature (Permit / Permit2 / Seaport / generic) into plain English with risk flags: unlimited approval, unknown/known-malicious spender, never-expiring or already-expired deadlines, zero-consideration NFT-drain orders. Off-chain signatures are the top wallet-drainer vector. Pure offline decode — never signs/broadcasts. Without payment returns the x402 challenge; pass x_payment. Free teaser: decode_signature_free.
Input Schema
{
"type": "object",
"properties": {
"typed_data": {
"type": "object",
"additionalProperties": {},
"description": "EIP-712 typed data object: {domain, types, primaryType, message}."
},
"chain": {
"type": "string",
"description": "Optional chain override (else read from domain.chainId)."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"required": [
"typed_data"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪decode_signature_free(typed_data, chain)
FREE. Type + plain-English summary + risk level for an EIP-712 `typed_data`. Real result, no wallet. Upgrade to decode_signature for the full field-by-field decode + all risk flags + malicious-spender screening.
Input Schema
{
"type": "object",
"properties": {
"typed_data": {
"type": "object",
"additionalProperties": {},
"description": "EIP-712 typed data object: {domain, types, primaryType, message}."
},
"chain": {
"type": "string",
"description": "Optional chain override (else read from domain.chainId)."
}
},
"required": [
"typed_data"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪approvals(address, chain, x_payment)
PAID $0.01 (x402, USDC on Base). Scan a wallet's ERC-20/721 approvals ranked by exposure; flags unlimited amounts, unverified/known-malicious spenders, and address-poisoning 'fake-approval revoke bait'; returns the exact revoke calldata you execute YOURSELF (never executed/broadcast by us). Without payment returns the x402 challenge; pass x_payment. Free teaser: approvals_free.
Input Schema
{
"type": "object",
"properties": {
"address": {
"type": "string",
"description": "0x wallet address to scan."
},
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"required": [
"address",
"chain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪approvals_free(address, chain)
FREE. Approval counts + top-3 riskiest spenders for {address, chain}. Real result, no wallet. Upgrade to approvals for EVERY approval ranked + revoke calldata.
Input Schema
{
"type": "object",
"properties": {
"address": {
"type": "string",
"description": "0x wallet address to scan."
},
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
}
},
"required": [
"address",
"chain"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢simulate(chain, from, to, data, value, ...)
PAID $0.02 (x402, USDC on Base). Keyless pre-sign analysis of {chain, from?, to, data, value?}: public-RPC eth_call revert check + static calldata decode predicting approval/transfer deltas + risk flags (unlimited approval, approval-for-all, reverts). Honest keyless limitation stated in the response (no full fork trace). Without payment returns the x402 challenge; pass x_payment. Free teaser: simulate_free.
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
},
"from": {
"type": "string",
"description": "0x sender (optional but improves accuracy)."
},
"to": {
"type": "string",
"description": "0x target contract/recipient."
},
"data": {
"type": "string",
"description": "0x calldata (omit for a plain value transfer)."
},
"value": {
"type": "string",
"description": "Value in wei (optional)."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"required": [
"chain",
"to"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪simulate_free(chain, from, to, data, value)
FREE. Method + revert flag + risk level + predicted effect types for a transaction. Real result, no wallet. Upgrade to simulate for the full predicted deltas + all risk flags.
Input Schema
{
"type": "object",
"properties": {
"chain": {
"type": "string",
"description": "Chain: ethereum | base | bsc | polygon | arbitrum | optimism."
},
"from": {
"type": "string",
"description": "0x sender (optional but improves accuracy)."
},
"to": {
"type": "string",
"description": "0x target contract/recipient."
},
"data": {
"type": "string",
"description": "0x calldata (omit for a plain value transfer)."
},
"value": {
"type": "string",
"description": "Value in wei (optional)."
}
},
"required": [
"chain",
"to"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
Evidence