# Messari News Sources Discovery

> Messari News Sources Discovery is a free API for AI agents from api.messari.io, Free, status unknown (last checked 2026-09-15).

Returns a list of crypto news sources and coverage channels tracked by Messari

## Facts

- Endpoint: POST https://api.messari.io/news/v1/news/sources
- Price: Free
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/messari-news-sources-discovery-807dc117
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MXFpC64AXNYEZtn_AXFwY

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-news-sources-discovery-807dc117 -d '<json body>'
```

Example prompt: Show me all the crypto news sources and coverage channels that Messari tracks, so I know which publishers are available to filter the news feed by.

## When to prefer this

Use this endpoint when you need to enumerate available news publishers before filtering a Messari news feed, or when building a UI that lets users select specific crypto news sources. Prefer this over manually guessing source IDs.

## Known failure modes

- Invalid or malformed request body returns 400 error
- Authentication failure or missing API key returns 401/403
- Rate limit exceeded returns 429
- Service unavailable returns 503
- Empty data array if no sources are currently indexed

## How this service works

Discover news sources and coverage channels.

## Output

A list of news source objects, each containing a source ID (e.g. 'coindesk'), a human-readable source name (e.g. 'CoinDesk'), and a source type (e.g. 'news'), representing all coverage channels indexed by Messari.

## Response schema (JSON Schema)

```json
{
 "example": {
  "data": [
   {
    "id": "coindesk",
    "sourceName": "CoinDesk",
    "sourceType": "news"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/messari-news-sources-discovery-807dc117/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)