# fastapi.online — Trending Endpoints Discovery

> fastapi.online — Trending Endpoints Discovery is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status down (last checked 2026-10-13).

Returns a list of currently trending or popular endpoints available on the fastapi.online self-hosted AI inference platform

## Facts

- Endpoint: POST https://api.fastapi.online/trending?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-trending-endpoints-discovery-059ce8d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_15cIPpGyL-IDrBDE6Oqll

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 fastapi-online-trending-endpoints-discovery-059ce8d0 -d '<json body>'
```

Example prompt: What are the trending or most popular AI endpoints available on fastapi.online right now — show me whatever tools are getting the most use.

## When to prefer this

Use this endpoint when you want to discover which AI capabilities on fastapi.online are currently popular or trending, before deciding which specific endpoint to call. Useful for dynamic tool selection, platform exploration, or building UIs that surface popular options.

## Known failure modes

- Empty or malformed POST body may result in a 422 validation error
- 402 Payment Required if no valid x402 crypto payment or API key is provided
- 503 or 500 if the self-hosted inference server is temporarily unavailable
- Rate limiting or rejection if the same caller polls too frequently

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.

## Output

A list of currently trending or popular endpoints on the fastapi.online platform, likely including endpoint names, categories, usage stats or rankings, and possibly short descriptions of each trending service.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-trending-endpoints-discovery-059ce8d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)