# HARS-Zero Signal API – Curated Polymarket Feed

> HARS-Zero Signal API – Curated Polymarket Feed is a paid API for AI agents from hars.cryptotavern.xyz, paid per call via x402, $0.102/call, status unknown (last checked 2026-10-18).

Returns a curated feed of Polymarket prediction market intelligence signals for AI agents, delivered via pay-per-call USDC micropayments.

## Facts

- Endpoint: GET https://hars.cryptotavern.xyz/paid/reseller/curated-feed?utm_source=zero.xyz
- Price: $0.102/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-curated-polymarket-feed-a15a7dc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W1_UbT0i_awhMW5bUWCVA

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-curated-polymarket-feed-a15a7dc2
```

Example prompt: Pull me the latest curated Polymarket prediction market feed from HARS-Zero — I want to see which markets are active and what signals they're showing right now.

## When to prefer this

Choose this endpoint when you need a pre-filtered, editorially curated subset of Polymarket markets rather than raw or unfiltered data. Ideal for AI agents that want high-signal, low-noise prediction market intelligence without building their own curation layer. Best suited for pay-per-call, on-demand use cases where fresh market snapshots matter and micropayment via x402/USDC is acceptable.

## Known failure modes

- Payment not attached or insufficient USDC — returns HTTP 402 requiring x402 payment
- Invalid or malformed properties filter — may return empty markets array
- Service unavailable — upstream Polymarket data outage could result in empty or stale response
- Rate limiting if payment is not processed correctly on Base or Solana chain

## How this service works

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

## Output

A JSON object containing a count of curated markets and an array of market objects with Polymarket intelligence signals. When no markets match the filter, returns count: 0 and an empty markets array.

## 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-curated-polymarket-feed-a15a7dc2/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)