# presign-guard Token Safety Checker

> presign-guard Token Safety Checker is a paid API for AI agents from presign-guard.fizzl.eu, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Analyzes a Solana or EVM token for honeypot, rug pull, and other risk signals, returning a SAFE/CAUTION/RISKY/AVOID grade with reasons and market data

## Facts

- Endpoint: GET https://presign-guard.fizzl.eu/v1/token?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/presign-guard-token-safety-checker-5f247f29
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T2JAVJIKpHGBCBlH9Pjtu

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 presign-guard-token-safety-checker-5f247f29
```

Example prompt: Before I buy, can you check if this Solana token at mint address 7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgAsU is safe — look for honeypot signals, rug pull risks, locked LP, and give me a SAFE/RISKY grade with the reasons?

## When to prefer this

Use this endpoint when an AI agent needs to autonomously assess token safety before executing a buy, accepting a token as payment, or recommending a token to a user — especially for newly launched tokens on Solana, Base, Ethereum, Arbitrum, Optimism, Polygon, or BSC. Prefer this over manual blockchain explorers when you need a structured, graded risk signal with specific red-flag codes rather than raw on-chain data.

## Known failure modes

- Unknown or unlisted token returns no market data (market field null)
- Invalid chain/address combination returns error
- Token too new to have DexScreener data — market data absent
- Unsupported chain returns validation error
- Network timeout from upstream DexScreener or on-chain RPC
- Payment not processed results in 402 response

## How this service works

Is this token safe to buy, or a honeypot or rug pull? Checks a Solana or EVM token before you buy, hold or accept it (mint or freeze authority still active, LP not locked, buy/sell tax, low liquidity, brand-new token, concentrated holders) and answers green/orange/red with a grade (SAFE/CAUTION/RISKY/AVOID), the reasons, a one-line summary and market data. Bulk: 100 checks for $0.80 via /v1/credits.

## Output

Returns a verdict object with a grade (SAFE, CAUTION, RISKY, or AVOID), a one-liner summary, an array of reason objects each with a code, severity (red/orange/info), and optional details, plus market data from DexScreener including price, liquidity, market cap, 24h volume, and token age. Also includes a signed receipt for proof of check.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "solana",
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "polygon",
        "bsc",
        "xrpl",
        "algorand"
       ],
       "type": "string",
       "description": "Chain the token lives on"
      },
      "address": {
       "type": "string",
       "description": "Solana mint address (base58), EVM token contract (0x...), an XRPL token as CURRENCY.rIssuer (e.g. RLUSD.rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De), or an Algorand asset id (e.g. 31566704)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "verdict",
      "grade",
      "one_liner",
      "reasons"
     ],
     "properties": {
      "grade": {
       "enum": [
        "SAFE",
        "CAUTION",
        "RISKY",
        "AVOID"
       ],
       "type": "string"
      },
      "token": {
       "type": "object"
      },
      "market": {
       "type": [
        "object",
        "null"
       ],
       "description": "DexScreener data: priceUsd, liquidityUsd, marketCapUsd, volume24hUsd, firstPairAt, ageSeconds, url"
      },
      "reasons": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "code",
         "severity"
        ],
        "properties": {
         "code": {
          "type": "string"
         },
         "details": {},
         "severity": {
          "enum": [
           "red",
           "orange",
           "info"
          ],
          "type": "string"
         }
        }
       }
      },
      "receipt": {
       "type": "object",
       "required": [
        "request_id",
        "route",
        "input_sha256",
        "signed_at",
        "signer",
        "algorithm",
        "signature"
       ],
       "properties": {
        "cert": {
        
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/presign-guard-token-safety-checker-5f247f29/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from presign-guard.fizzl.eu](https://www.zero.xyz/host/presign-guard.fizzl.eu/llms.txt)