# ScriptMasterLabs Stablecoin Market Cap API

> ScriptMasterLabs Stablecoin Market Cap API is a paid API for AI agents from acp-x402-discovery.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).

Returns current stablecoin market capitalization data, paid per-call in USDC via the x402 protocol on Base.

## Facts

- Endpoint: GET https://acp-x402-discovery.onrender.com/x402/stablecoin-mcap?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scriptmasterlabs-stablecoin-market-cap-api-6034055b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PMlnnLHua7ynajcJAN68J

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 scriptmasterlabs-stablecoin-market-cap-api-6034055b
```

Example prompt: What is the current total stablecoin market cap? Pay for the lookup via x402 on Base.

## When to prefer this

Choose this endpoint when you need stablecoin market cap data and are operating in a crypto-native, x402-payment-enabled environment settled in USDC on Base. It is a micro-cost ($0.001 USDC) pay-per-call option suitable for agents that already integrate x402 payment flows. Prefer established data providers (CoinGecko, CoinMarketCap) if you need richer schema documentation, high reliability, or traditional API key authentication.

## Known failure modes

- Payment failure if USDC balance on Base is insufficient or x402 payment not properly configured
- 402 Payment Required if payment header is missing or malformed
- Empty or stub response due to low crawl quality and undocumented schema
- Service unavailability on Render free-tier hosting (cold starts, downtime)
- Rate limiting or access errors if the upstream data source is unavailable

## How this service works

Pay-per-call crypto, RWA, federal, SEC, and compliance APIs. Settled in USDC on Base via x402. Hyphen routes only (e.g. /x402/rwa-aggregates, /x402/gas-tracker).

## Output

Returns current stablecoin market capitalization data, likely including total market cap figures and possibly per-stablecoin breakdowns (e.g. USDC, USDT, DAI). Response schema is minimal/undocumented; expect a JSON object with market cap values.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-stablecoin-market-cap-api-6034055b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from acp-x402-discovery.onrender.com](https://www.zero.xyz/host/acp-x402-discovery.onrender.com/llms.txt)