# Vextorium Mastodon Following Lookup

> Vextorium Mastodon Following Lookup is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-18).

Returns the list of Mastodon accounts that a given user (user@instance) follows, including name, follower count, bot flag, and profile link.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/mastodon-following?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-mastodon-following-lookup-a70204f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W6YQ0FLtXQqW_EzzJLGl_

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-mastodon-following-lookup-a70204f4 -d '<json body>'
```

Example prompt: Can you fetch the list of Mastodon accounts that Gargron@mastodon.social follows — up to 50 results — and show me their names, follower counts, and whether any are bots?

## When to prefer this

Use this endpoint when you need structured, enriched following-list data from a Mastodon account, including bot flags and follower counts, without having to interface directly with the Mastodon API. Prefer this over raw Mastodon API calls when you want a simple JSON lookup with metadata in a single pay-per-call request.

## Known failure modes

- Account not found or does not exist on the specified instance — returns an error or empty list
- Instance is not mastodon.social or is unreachable — may return error or unsupported instance message
- Limit parameter too high — may be capped or cause timeout
- Malformed account string (missing @ or instance) — likely returns a validation error
- Rate limiting by upstream Mastodon public API — may return partial results or error

## 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

Returns a JSON object with the account handle queried, total number of accounts they follow, and a list of followed accounts each containing: account handle (user@instance), display name, follower count, bot flag (boolean), and profile URL. Also includes the data source attribution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer"
  },
  "account": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 40,
  "source": "Mastodon public API (mastodon.social)",
  "account": "Gargron@mastodon.social",
  "following": [
   {
    "bot": false,
    "url": "https://hachyderm.io/@samhenrigold",
    "name": "sam henri gold",
    "account": "samhenrigold@hachyderm.io",
    "followers": 4392
   },
   {
    "bot": false,
    "url": "https://social.vivaldi.net/@jon",
    "name": "Jon S. von Tetzchner",
    "account": "jon@vivaldi.net",
    "followers": 12333
   }
  ],
  "total_following": 752
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-mastodon-following-lookup-a70204f4/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)