# Saylor Innovations Stablecoin Supply & Peg Data

> Saylor Innovations Stablecoin Supply & Peg Data is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Returns circulating supply, price, peg deviation, and 1d/7d/30d change metrics for USDT, USDC, and 300+ stablecoins across top chains

## Facts

- Endpoint: GET https://saylorinnovations.com/api/defi/stablecoins?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-stablecoin-supply-peg-data-2c6f2b92
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-bp6RGm8lZvkGvq6zrtIH

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 saylor-innovations-stablecoin-supply-peg-data-2c6f2b92
```

Example prompt: Can you pull up the current circulating supply, price, and peg deviation for USDC and USDT, and show me how their supply has changed over the last 30 days?

## When to prefer this

Choose this endpoint when you need real-time circulating supply, price, and peg health data for stablecoins — especially when you need multi-period change metrics (1d/7d/30d) and chain-level distribution in a single call. Prefer it over generic crypto price APIs when stablecoin-specific fields like peg deviation and peg mechanism are required.

## Known failure modes

- Query parameter returns zero matches if symbol or name is not recognized
- Limit parameter out of range (must be 1-50) may return an error or default
- Peg deviation or price fields may be null for less-liquid stablecoins
- Data freshness may lag if upstream source is delayed
- Payment failure (x402) if USDC balance is insufficient for the $0.01 per-call fee

## How this service works

Stablecoin supply and peg - circulating supply, price, peg deviation, 1d/7d/30d change and top chains for USDT, USDC and 300+ stablecoins

## Output

A JSON object containing an array of stablecoin records, each with name, symbol, peg type, peg mechanism, price in USD, circulating supply, peg deviation percentage, 1d/7d/30d percentage changes, and top chains. Also includes total circulating supply shown, query echo, data source, and timestamp.

## 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",
     "properties": {
      "q": {
       "type": "string",
       "description": "optional name or symbol text, e.g. usdc, dai, ethena"
      },
      "limit": {
       "type": "string",
       "description": "optional 1-50, default 10"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "matched",
      "stablecoins"
     ],
     "properties": {
      "query": {
       "type": [
        "string",
        "null"
       ],
       "description": "The query as the server interpreted it"
      },
      "source": {
       "type": [
        "string",
        "null"
       ],
       "description": "Data source the values come from"
      },
      "matched": {
       "type": "number",
       "description": "Number of items that matched the query"
      },
      "checked_at": {
       "type": [
        "string",
        "null"
       ],
       "description": "Time the check was run (UTC)"
      },
      "stablecoins": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "name": {
          "type": "string",
          "description": "Name"
         },
         "chains": {
          "description": "Chains covered"
         },
         "symbol": {
          "type": "string",
          "description": "Ticker or asset symbol"
         },
         "peg_type": {
          "description": "Peg type"
         },
         "price_usd": {
          "type": [
           "number",
           "null"
          ],
          "description": "Price in US dollars"
         },
         "top_chains": {
          "type": "array",
          "items": {
           "type": "object"
          },
          "description": "Top chains"
         },
         "circulating": {
          "type": "number"
         },
         "change_1d_pct": {
          "description": "Change over 1 day, percent"
         },
         
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-stablecoin-supply-peg-data-2c6f2b92/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)