# Stablecoin Single-Coin Census

> Stablecoin Single-Coin Census is a paid API for AI agents from aeml-x402.zeabur.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns latest market cap, price, peg deviation, lifecycle status, and time-series observation for a single stablecoin by symbol

## Facts

- Endpoint: GET https://aeml-x402.zeabur.app/stable/coin
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stablecoin-single-coin-census-4cb25aed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D2z2Av5Sg5EHcvfTdFwUj

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 stablecoin-single-coin-census-4cb25aed
```

Example prompt: Can you pull the latest peg status, market cap, and lifecycle info for USDT — I want to know if it's showing any depeg pressure right now?

## When to prefer this

Use this endpoint when you need a focused, single-coin deep-dive on a stablecoin's health, peg stability, lifecycle stage, and market metrics — especially when monitoring for depeg events or researching coin history. Prefer this over the full stablecoin triangle endpoint when you only need the census snapshot rather than the full depeg-pressure and redemption-flight triangle.

## Known failure modes

- Unknown or unsupported symbol returns empty or error response
- Stale data if data_age_hours is high for illiquid or delisted coins
- Missing lifecycle fields for very new stablecoins with insufficient history
- Payment required (402) if USDC payment not provided
- Some fields may be null for coins with limited source coverage

## How this service works

[SIGNAL+PROOF] Census record for one stablecoin (?symbol=): market cap, price, depeg state, lifecycle and time series, each with record_hash. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.

## Output

Returns a JSON object with coin_id, name, current observation data (state, peg deviation, death type, lifespan days depending on source), lifecycle info (peg/state/first_seen/last_seen/end_at), companion signal path for depeg/redemption pressure, source tier, capture date, data age in hours, and a record hash for integrity verification.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": false,
     "properties": {
      "symbol": {
       "type": "string",
       "description": "required - stablecoin symbol; samples at free /stable/preview (sample_ids)",
       "examples": [
        "basis-cash-bac"
       ]
      }
     },
     "required": [
      "symbol"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "queryParams"
   ]
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   },
   "required": [
    "type"
   ]
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablecoin-single-coin-census-4cb25aed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aeml-x402.zeabur.app](https://www.zero.xyz/host/aeml-x402.zeabur.app/llms.txt)