About FabTally Safe
FabTally Safe is a read-only MCP server for crypto token checks and transaction or signature review, aimed at AI agents and wallets. It provides free teaser tools and paid tools, without holding, signing, or moving funds.
Key features
- 01Check token honeypot and rug risks
- 02Decode EIP-712 and related signatures
- 03Scan wallet approvals for exposure
- 04Analyze transactions before signing
- 05Offer free and paid tool tiers
Use cases
- 01Review a token before interacting with it
- 02Understand typed data before signing
- 03Find risky wallet approvals
- 04Check a transaction before signing
MCP support
The MCP server exposes eight read-only tools for token checks, signature decoding, approval scans, and transaction analysis. It supports stdio and streamable HTTP transports.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://safe.fabtally.com/mcpclaude mcp add --transport http zvmzaretsky-crypto-safety https://safe.fabtally.com/mcp{"mcpServers":{"zvmzaretsky-crypto-safety":{"type":"http","url":"https://safe.fabtally.com/mcp"}}}Open in Cursor{"servers":{"zvmzaretsky-crypto-safety":{"type":"http","url":"https://safe.fabtally.com/mcp"}}}Open in VS Code{"mcpServers":{"zvmzaretsky-crypto-safety":{"type":"http","url":"https://safe.fabtally.com/mcp"}}}{"mcpServers":{"zvmzaretsky-crypto-safety":{"serverUrl":"https://safe.fabtally.com/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
8| Parameter | Type | Required | Description |
|---|---|---|---|
| chain | string | Yes | Chain: ethereum | base | bsc | polygon | arbitrum | optimism. |
| address | string | Yes | 0x token contract address. |
| x_payment | string | No | 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. |
Details
From the project READMEFabTally Safe — MCP server
Read-only crypto safety + "what am I signing" verification for AI agents and wallets. Fronts the FabTally Safe HTTP API (https://safe.fabtally.com).
- Read-only. Never holds, moves, signs for, or broadcasts funds. No private key. Outputs are descriptive facts from public sources — not financial advice.
- 8 tools: 4 free teasers + 4 paid (x402, USDC on Base).
Tools
| Tool | Tier | What it does |
|---|---|---|
token_safety | paid $0.02 | Multi-chain token honeypot/rug check — aggregates GoPlus + honeypot.is into a 0-100 risk score with explainable reasons. |
decode_signature | paid $0.01 | "What am I signing" — decode EIP-712 / Permit / Permit2 / Seaport typed-data into plain English + risk flags (unlimited approval, malicious spender, expiry, NFT-drain). |
approvals | paid $0.01 | Wallet approval-risk scan ranked by exposure + address-poisoning "revoke bait" detection + the revoke calldata you execute yourself. |
simulate | paid $0.02 | Keyless pre-sign transaction analysis: eth_call revert check + static delta prediction + risk flags. |
token_safety_free · decode_signature_free · approvals_free · simulate_free | free | Real teaser results, no wallet. |
Chains: ethereum, base, bsc, polygon, arbitrum, optimism (honeypot.is signals on ethereum/base/bsc).
Payment
Paid tools use x402 (USDC on Base, eip155:8453). Call a paid tool with no
x_payment to receive the decoded 402 challenge (price, network, asset, payTo);
build an x402 authorization and call again with the token in x_payment. Humans
can instead prepay by card and use an X-FabTally-Key credit header on the HTTP API.
Transports
- stdio (default):
node index.js— for Claude Desktop and local MCP clients. - streamable-http:
MCP_HTTP_PORT=8113 node http.js— hosted athttps://safe.fabtally.com/mcp.
Config
FABTALLY_SAFE_BASE— API base (defaulthttps://safe.fabtally.com).
Operator: Sunstone Soft · https://fabtally.com · Not financial advice · read-only.
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.