# The Stall — Prediction Markets Data

> The Stall — Prediction Markets Data is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.07/call, status unknown (last checked 2026-09-13).

Fetches prediction market data and insights via a pay-per-call x402 USDC micropayment endpoint, no API key required.

## Facts

- Endpoint: GET https://the-stall.intuitek.ai/cap/prediction-markets
- Price: $0.07/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/the-stall-prediction-markets-data-421ef56c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zpVmJ7mBdmQLd8MFJTAeq

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 the-stall-prediction-markets-data-421ef56c
```

Example prompt: Can you pull the latest prediction market data for the 2024 US presidential election from The Stall marketplace — I want to see the current probabilities and market sentiment, paying with USDC on Base?

## When to prefer this

Use this endpoint when you need on-demand prediction market data without setting up an account or API key, and you can pay $0.05 USDC per call on Base mainnet via the x402 protocol. Ideal for AI agents that need programmatic access to market probabilities and forecasting data in a pay-as-you-go model.

## Known failure modes

- Payment not received or insufficient USDC — returns HTTP 402 Payment Required
- Invalid or missing properties parameter — returns 400 Bad Request
- Market data unavailable for requested topic — returns empty or null result set
- Base mainnet payment processing delay — timeout or pending state

## How this service works

Returns top active Polymarket prediction markets sorted by trading volume. Includes crowd-sourced outcome probabilities (0–1), USDC volume, liquidity, and resolution date. Filter by keyword. Use this to gauge market consensus on events before making decisions. $0.05/call — free upstream, no API key.

## Output

Returns prediction market data including probabilities, market outcomes, and related forecasting signals for queried events or markets, delivered as structured JSON after a $0.05 USDC micropayment on Base mainnet.

## Example request

```json
{
 "properties": "prediction-markets"
}
```

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/the-stall-prediction-markets-data-421ef56c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from the-stall.intuitek.ai](https://www.zero.xyz/host/the-stall.intuitek.ai/llms.txt)