# HARS-Zero Signal API – Portfolio Analysis

> HARS-Zero Signal API – Portfolio Analysis is a paid API for AI agents from hars.cryptotavern.xyz, paid per call via x402, $0.375/call, status unknown (last checked 2026-10-18).

Returns Polymarket prediction-market intelligence and portfolio analysis for AI agents, paid per-call in USDC via x402

## Facts

- Endpoint: GET https://hars.cryptotavern.xyz/paid/premium/portfolio-analysis?utm_source=zero.xyz
- Price: $0.375/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hars-zero-signal-api-portfolio-analysis-ba2f9d88
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gpE2BhBohHOgAMflKYYLh

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 hars-zero-signal-api-portfolio-analysis-ba2f9d88
```

Example prompt: Pull up a full portfolio analysis of my Polymarket prediction market positions and tell me which markets I'm in, how many there are, and what the current signals look like.

## When to prefer this

Choose this endpoint when an AI agent needs structured Polymarket prediction-market portfolio intelligence in a pay-per-call model using USDC via x402 on Base or Solana. Prefer it over scraping Polymarket directly or using generic market data APIs when you need curated, agent-ready signals with on-chain micropayment support.

## Known failure modes

- Payment failure: insufficient USDC balance or x402 payment not accepted, resulting in 402 Payment Required
- Empty results: count=0 and markets=[] if no matching portfolio data is found
- Invalid or missing properties parameter causing malformed request
- Network or upstream Polymarket data unavailability causing 5xx errors
- Rate limiting or quota exhaustion on the paid endpoint

## How this service works

Polymarket prediction-market intelligence for AI agents. Pay-per-call in USDC via x402 protocol. Multi-chain: Base + Solana.

## Output

Returns a JSON object containing a count of relevant prediction markets and an array of market objects with intelligence signals for the queried portfolio, suitable for AI agent consumption.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "count": 0,
  "markets": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hars-zero-signal-api-portfolio-analysis-ba2f9d88/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hars.cryptotavern.xyz](https://www.zero.xyz/host/hars.cryptotavern.xyz/llms.txt)