# HARS-Zero Signal API – Aggregated Polymarket Brief

> HARS-Zero Signal API – Aggregated Polymarket Brief is a paid API for AI agents from hars.cryptotavern.xyz, paid per call via x402, $0.032/call, status unknown (last checked 2026-10-18).

Returns an aggregated intelligence brief of Polymarket prediction markets for AI agents, paid per-call in USDC via x402 protocol.

## Facts

- Endpoint: GET https://hars.cryptotavern.xyz/paid/reseller/aggregated-brief?utm_source=zero.xyz
- Price: $0.032/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-aggregated-polymarket-brief-4defdb4c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kjfWGBrGaPdnxAjbIQecS

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-aggregated-polymarket-brief-4defdb4c
```

Example prompt: Pull me an aggregated brief of the current Polymarket prediction markets so I can see what the crowd is signaling about upcoming events.

## When to prefer this

Choose this endpoint when your AI agent needs a ready-made, aggregated intelligence snapshot of Polymarket prediction markets without building Polymarket API integrations yourself. It is especially useful for agents that operate autonomously and can pay per-call in USDC via the x402 protocol, requiring minimal setup. Prefer it over raw Polymarket APIs when you want a summarised, agent-optimised brief rather than raw data.

## Known failure modes

- Payment not included or insufficient USDC via x402 protocol — returns 402 Payment Required
- No markets match the given filter properties — returns count:0 and empty markets array
- Service unavailable or upstream Polymarket data disruption — returns 5xx error
- Malformed request properties — returns 4xx validation error

## 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 matching prediction markets and an array of market objects (the aggregated brief), representing current Polymarket intelligence distilled for 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-aggregated-polymarket-brief-4defdb4c/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)