# Apollo Sentiment Analysis API

> Apollo Sentiment Analysis API is a paid API for AI agents from apolloai.team, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).

Returns real-time sentiment scores, trend direction, and volume signals for topics relevant to the agentic economy and crypto/Web3 space

## Facts

- Endpoint: GET https://apolloai.team/api/sentiment
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apollo-sentiment-analysis-api-87476270
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2TF1Zql4vQENwcw0tfflR

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 apollo-sentiment-analysis-api-87476270
```

Example prompt: What's the current sentiment and trend direction for 'agent_economy' right now — is it bullish, bearish, or stable, and how high is the volume?

## When to prefer this

Choose this endpoint when you need rapid, pre-computed sentiment scores for crypto, Web3, or agentic economy topics without building your own NLP pipeline. Prefer it over general-purpose NLP APIs when your domain is specifically DeFi, AI agents, or blockchain narratives, and you want trend direction and volume alongside raw sentiment scores.

## Known failure modes

- Missing or invalid topic parameter returns an error or empty topics map
- Rate limit exceeded beyond 5 free requests/day returns 402 or payment required error
- Unknown or unsupported topic returns empty or null entry in topics map
- Network timeout returns no response
- Stale data if the feed has not refreshed recently

## How this service works

Apollo Intelligence Network: 54 API endpoints for AI agents — data feeds, proxy, OSINT, DeFi, crypto, Etherscan, weather, ML/NLP. Free trial: 5 requests/day. Pay-per-request via x402 or API key.

## Output

A JSON object mapping topic names to sentiment objects, each containing a numeric sentiment score (0-1), a trend label (bullish/bearish/stable), and a volume label (low/medium/high), plus a generated_at timestamp indicating data freshness.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "topics": {
   "x402": {
    "trend": "stable",
    "volume": "medium",
    "sentiment": 0.85
   },
   "agent_economy": {
    "trend": "bullish",
    "volume": "high",
    "sentiment": 0.72
   }
  },
  "generated_at": "2026-02-06T12:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apollo-sentiment-analysis-api-87476270/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apolloai.team](https://www.zero.xyz/host/apolloai.team/llms.txt)