# Vextorium Stablecoins by Chain

> Vextorium Stablecoins by Chain is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-28).

Returns the total stablecoin market cap distributed across blockchain networks, showing each chain's share and USD value, sourced from DefiLlama.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/stablecoins-by-chain?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-stablecoins-by-chain-3afa5b13
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LgKzHJX36L0UvzyCPcg7Q

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 vextorium-stablecoins-by-chain-3afa5b13 -d '<json body>'
```

Example prompt: Can you show me the top 20 blockchains ranked by stablecoin market cap, including what percentage share each chain holds?

## When to prefer this

Choose this endpoint when you need a ranked, multi-chain breakdown of stablecoin liquidity with percentage share calculations — particularly when comparing EVM and non-EVM chains side by side. Prefer over manual aggregation or generic crypto APIs when you want DefiLlama-sourced data with share percentages pre-computed and a configurable number of top chains returned.

## Known failure modes

- Invalid limit value (outside 1-50 range) returns a validation error
- Upstream DefiLlama data unavailability may cause stale or missing chain data
- Malformed request body type (not json/form-data/text) returns a 400 error
- Payment not attached or insufficient USDC balance causes a 402 Payment Required response

## How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

## Output

A JSON object containing an array of chains each with their name, stablecoin value in USD, and percentage share of the total, plus the global total_stablecoins_usd across all chains. Sourced from DefiLlama. Example: Ethereum holds ~$146B (47.65%), Tron ~$94B (30.67%), total ~$306B.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "description": "Number of chains (1-50, default 15)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Stablecoin money per chain = liquidity ready to buy. Source: DefiLlama.",
  "chains": [
   {
    "chain": "Ethereum",
    "share_pct": 47.65,
    "stablecoins_usd": 146060219365
   },
   {
    "chain": "Tron",
    "share_pct": 30.67,
    "stablecoins_usd": 94012972425
   }
  ],
  "total_stablecoins_usd": 306509105082
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-stablecoins-by-chain-3afa5b13/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)