# Polymarket Crypto Up/Down Predictions

> Polymarket Crypto Up/Down Predictions is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.059/call, status unknown (last checked 2026-09-13).

Fetches Polymarket prediction market probabilities for whether a specific cryptocurrency will go up or down in price over a defined period.

## Facts

- Endpoint: GET https://the-stall.intuitek.ai/cap/polymarket-crypto-updown
- Price: $0.059/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/polymarket-crypto-up-down-predictions-580f15df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CwVRH5z5vZYLN14-oxtIs

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 polymarket-crypto-up-down-predictions-580f15df
```

Example prompt: What are the current Polymarket odds that Bitcoin will go up over the next 24 hours?

## When to prefer this

Use this endpoint when you need crowd-sourced prediction market probability for a specific crypto asset's price direction, particularly when you want Polymarket's real-money market signal rather than a model-based forecast or news sentiment score. Best for agents building trading decision support, market briefings, or sentiment dashboards that specifically value Polymarket's crowd wisdom.

## Known failure modes

- Unsupported cryptocurrency symbol returns empty or error response
- Polymarket market unavailable for the requested asset or timeframe
- Stale market data if Polymarket contract has resolved or been paused
- Payment failure on Base mainnet causes 402 response
- Invalid or missing query parameters result in schema validation error

## How this service works

Crypto price direction prediction markets from Polymarket. Returns binary up/down markets for BTC, ETH, SOL, XRP and other assets — current market consensus on near-term price direction. Filter by asset symbol or get all active crypto markets. Use for directional sentiment, agent decision context, or signal feeds.

## Output

Returns the Polymarket-sourced probability (as a percentage or decimal) indicating the crowd-predicted likelihood that the specified cryptocurrency will increase or decrease in price within the given timeframe, drawn from live prediction market contract data.

## Example request

```json
{
 "required": "BTC",
 "properties": "24h"
}
```

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarket-crypto-up-down-predictions-580f15df/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)