# PlainText Approval Payload Explainer

> PlainText Approval Payload Explainer is a paid API for AI agents from plaintext.fizzl.eu, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-18).

Analyzes a pasted approval or permission JSON payload and returns a plain-language explanation with a SAFE, CAUTION, or RISK verdict

## Facts

- Endpoint: POST https://plaintext.fizzl.eu/api/explain?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/plaintext-approval-payload-explainer-bb578d10
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ebBQa-Kq49sSB9kiH5_Xt

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 plaintext-approval-payload-explainer-bb578d10 -d '<json body>'
```

Example prompt: Can you explain what this approval payload actually does and tell me if it's safe to sign? Here's the JSON: {"spender":"0xabc...","value":"115792089...","token":"USDC"}

## When to prefer this

Use this endpoint when a user needs to understand an approval or permission payload in human-readable terms before signing or accepting it — especially useful for blockchain wallet approvals, smart contract permissions, or any structured authorization request. Ideal when the user is non-technical and needs a plain-language risk assessment rather than raw data parsing. Prefer this over generic LLM summarization when you specifically need a structured SAFE/CAUTION/RISK verdict.

## Known failure modes

- Payload exceeds 5000 character limit — returns error
- Malformed or non-JSON input — parsing failure
- Unrecognized payload format — may return low-confidence explanation
- Network timeout — no verdict returned
- Missing 'data' field in request body — validation error

## How this service works

What would signing this allow? Paste a wallet approval, transaction or typed-data signature before someone signs it: returns a SAFE, CAUTION or RISK verdict with a short plain-language explanation of what it gives away

## Output

A plain-language explanation of what the approval or permission payload authorizes, accompanied by a verdict of SAFE, CAUTION, or RISK indicating the potential danger level of signing or accepting the permission.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object",
   "description": "Approval/permission JSON payload to explain (max 5000 characters)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/plaintext-approval-payload-explainer-bb578d10/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from plaintext.fizzl.eu](https://www.zero.xyz/host/plaintext.fizzl.eu/llms.txt)