# Messari Stablecoin Metrics Discovery

> Messari Stablecoin Metrics Discovery is a free API for AI agents from api.messari.io, Free, status unknown (last checked 2026-09-13).

Returns available stablecoin metric dataset slugs and their supported time granularities for use in subsequent data queries.

## Facts

- Endpoint: POST https://api.messari.io/metrics/v2/stablecoins/metrics
- Price: Free
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/messari-stablecoin-metrics-discovery-79564a31
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oD7IiV7S0j5r7_EzPg77q

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 messari-stablecoin-metrics-discovery-79564a31 -d '<json body>'
```

Example prompt: What stablecoin metric slugs are available on Messari, and what granularities do they support? I want to know which ones I can use to query outstanding supply or other stablecoin-specific datasets.

## When to prefer this

Use this endpoint before querying stablecoin time-series data when you don't know which metric slugs or granularities are valid. It acts as a discovery layer — call it first to enumerate supported metrics, then use the returned slugs in subsequent stablecoin history endpoints.

## Known failure modes

- Invalid or malformed POST body returns 400 error
- Authentication or payment failure returns 401/402 error
- No matching metrics found returns empty data array
- Endpoint unavailable returns 503

## How this service works

Find stablecoin metric dataset slugs and supported granularities.

## Output

A list of stablecoin metric dataset objects, each containing a slug identifier (e.g. 'outstanding-supply-usd'), a human-readable name, and an array of supported granularities (e.g. '1d').

## Response schema (JSON Schema)

```json
{
 "example": {
  "data": [
   {
    "slug": "outstanding-supply-usd",
    "metrics": [
     {
      "name": "Outstanding Supply USD",
      "slug": "outstandingSupplyUsd"
     }
    ],
    "granularities": [
     "1d"
    ]
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/messari-stablecoin-metrics-discovery-79564a31/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.messari.io](https://www.zero.xyz/host/api.messari.io/llms.txt)