# PoolProof Stablecoin Peg Analyzer

> PoolProof Stablecoin Peg Analyzer is a paid API for AI agents from poolproof.ru, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Analyzes a stablecoin's historical price data to determine whether its $1 peg is a hard anchor or soft peg, and flags current dislocation from the peg

## Facts

- Endpoint: POST https://poolproof.ru/v1/stable
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/poolproof-stablecoin-peg-analyzer-938a5e33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g-jRgGv6Lr3oiAxAvqIOM

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 poolproof-stablecoin-peg-analyzer-938a5e33 -d '<json body>'
```

Example prompt: Before I put funds into this yield pool, check whether FRAX has a hard or soft peg to $1 — look at its 90-day price history and tell me if it's historically anchored at $1 or just drifts close, and flag it if it's dislocated right now.

## When to prefer this

Choose this endpoint when you need a structured, flag-based verdict on stablecoin peg quality backed by 90 days of historical price data — especially before depositing into yield pools, using a stablecoin as collateral, or assessing whether an algorithmic stablecoin is truly redeemable at $1. It is purpose-built for DeFi risk workflows and surfaces SOFT_PEG, BROKEN_HISTORY, and DISLOCATION signals that generic price feeds do not provide.

## Known failure modes

- Unknown or unsupported stablecoin address returns error or empty result
- Insufficient price history (less than 90 days) triggers BROKEN_HISTORY flag
- Token address not recognized as a stablecoin returns invalid input error
- API payment failure due to missing or invalid x402 payment header
- Network or data provider outage may cause temporary unavailability

## How this service works

Is this stablecoin's $1 peg a hard anchor or a soft peg: does its price historically return to $1 (a redemption/arbitrage anchor) or sit below it (the market pricing risk), and is it dislocated right now. Flags SOFT_PEG, BROKEN_HISTORY, DISLOCATION

## Output

Returns a JSON object with an `ok` boolean, a `verdict` string classifying the peg as hard anchor or soft peg, an array of `flags` (each with a code like SOFT_PEG, BROKEN_HISTORY, or DISLOCATION and an explanatory message), and a `disclaimer`. Empty flags array means no issues detected.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "flags": {
    "type": "array",
    "items": {
     "type": "object",
     "properties": {
      "msg": {
       "type": "string"
      },
      "code": {
       "type": "string"
      }
     }
    },
    "description": "Empty means nothing failed the checks"
   },
   "verdict": {
    "type": "string"
   },
   "disclaimer": {
    "type": "string"
   }
  }
 },
 "description": "Whether a stablecoin's $1 peg is a hard anchor (price returns to $1) or a soft peg (sits below it), decided from 90 days of history, plus any dislocation right now. Flags SOFT_PEG, BROKEN_HISTORY, DISLOCATION."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/poolproof-stablecoin-peg-analyzer-938a5e33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from poolproof.ru](https://www.zero.xyz/host/poolproof.ru/llms.txt)