# Fia Signals Token Safety Check (Single Token)

> Fia Signals Token Safety Check (Single Token) is a paid API for AI agents from x402.fiasignals.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Returns a safe/risky/blocked verdict, risk score, reasons, confidence, and source attribution for a single Base/EVM token contract address before a swap.

## Facts

- Endpoint: GET https://x402.fiasignals.com/token-safety
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fia-signals-token-safety-check-single-token-fb19509a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bQiXTfm2CU-Y2vfrHVGIk

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fia-signals-token-safety-check-single-token-fb19509a
```

Example prompt: Before I swap into this token, run a safety check on contract address 0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed on Base — give me the verdict, risk score, and reasons so I know if it's safe to proceed.

## When to prefer this

Use this endpoint when you need a single-token pre-swap risk gate on Base/EVM chains with a clear safe/risky/blocked verdict backed by GoPlus and DexScreener evidence. Prefer this over the batch endpoint when screening just one contract to minimize cost, or when you need a fast inline check within a swap workflow.

## Known failure modes

- Missing or malformed token_address query parameter returns an error
- Unsupported chain value causes rejection
- Token address not found on-chain or in data sources may return low-confidence or incomplete result
- Payment of 0.03 USDC not fulfilled triggers 402 response
- Rate limiting if too many calls in quick succession

## How this service works

Base token safety, honeypot, rug-check and swap-preflight verdict before a buyer agent signs or routes a token swap. Required query: ?chain=base&token_address=0x... Returns PROCEED, CAUTION or REJECT with safety score, GoPlus and DexScreener evidence, liquidity/rugpull signals, warnings, and source attribution. Free preview: /token-safety/free. Search keywords: rug check, honeypot check, token risk, swap preflight, rug pull, scam token, and is this token safe.

## Output

A decisive verdict of safe, risky, or blocked for the token, plus a numeric risk score, list of risk reasons (e.g. honeypot, low liquidity, rugpull indicators), a confidence value, and attribution to underlying data sources like GoPlus and DexScreener.

## Example request

```json
{
 "chain": "base",
 "token_address": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed"
}
```

## Request schema (JSON Schema)

```json
{
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "token_address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "base"
       ],
       "type": "string",
       "default": "base",
       "description": "Required. Use base for Base mainnet token checks."
      },
      "token_address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Required EVM token contract address to check before a swap."
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "action": {
     "enum": [
      "PROCEED",
      "CAUTION",
      "REJECT"
     ],
     "type": "string"
    },
    "reasons": {
     "type": "array",
     "items": {
      "type": "string"
     }
    },
    "sources": {
     "type": "array",
     "items": {
      "type": "string"
     }
    },
    "verdict": {
     "enum": [
      "safe",
      "risky",
      "blocked"
     ],
     "type": "string"
    },
    "warnings": {
     "type": "array",
     "items": {
      "type": "string"
     }
    },
    "confidence": {
     "type": "string"
    },
    "raw_checks": {
     "type": "object"
    },
    "safety_score": {
     "type": "integer",
     "maximum": 100,
     "minimum": 0
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fia-signals-token-safety-check-single-token-fb19509a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.fiasignals.com](https://www.zero.xyz/host/x402.fiasignals.com/llms.txt)