# BaseBuilder Sentiment Trending

> BaseBuilder Sentiment Trending is a paid API for AI agents from bb-sentiment.vercel.app, paid per call via x402, $0.0642/call, status unknown (last checked 2026-10-27).

Analyzes and returns trending sentiment signals from social/market data via the BaseBuilder Sentiment API hub

## Facts

- Endpoint: POST https://bb-sentiment.vercel.app/api/sentiment/trending?utm_source=zero.xyz
- Price: $0.0642/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-sentiment-trending-4514cdc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wjEoh2u7SM9JJOvz5Bx7R

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 basebuilder-sentiment-trending-4514cdc2 -d '<json body>'
```

Example prompt: What topics are trending right now with the strongest positive or negative sentiment — can you pull the current trending sentiment data and show me the top results?

## When to prefer this

Use this endpoint when you need to discover what topics or assets are currently trending alongside their sentiment polarity, rather than analyzing sentiment for a specific known piece of text. Best for real-time market mood, social listening dashboards, or surfacing emerging narratives with emotional context.

## Known failure modes

- Payment not included or insufficient USDC — returns 402 Payment Required
- Invalid or missing POST body parameters — returns 400 Bad Request
- Rate limit exceeded — returns 429 Too Many Requests
- Service unavailable or cold-start delay on Vercel — returns 503 or timeout
- No trending data available for the requested time window — returns empty result set

## How this service works

BaseBuilder Sentiment API hub - 14 paid endpoints

## Output

Returns a ranked list of trending topics or assets with associated sentiment scores, labels (positive/negative/neutral), and trend signals derived from aggregated social or market data.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-sentiment-trending-4514cdc2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-sentiment.vercel.app](https://www.zero.xyz/host/bb-sentiment.vercel.app/llms.txt)