# BlockRun.AI Polymarket Price History

> BlockRun.AI Polymarket Price History is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.0075/call, status unknown (last checked 2026-09-16).

Retrieves the historical price data for a specific Polymarket prediction market by condition ID.

## Facts

- Endpoint: GET https://blockrun.ai/api/v1/surf/prediction-market/polymarket/prices
- Price: $0.0075/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockrun-ai-96e88310
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q5Fg0931wUoMfw8dXwI7W

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 blockrun-ai-96e88310
```

Example prompt: Can you pull up the full price history for the Polymarket market with condition ID 0x1234abcd... so I can see how the odds moved over time?

## When to prefer this

Use this endpoint when you need historical price/odds data for a specific Polymarket prediction market identified by its condition ID. Prefer this over general market listing endpoints when you already know the condition ID and need time-series price data rather than current state or top holders.

## Known failure modes

- Invalid or missing condition_id returns an error response
- Unknown condition_id returns empty or not-found response
- Polymarket market no longer active may return limited or no data
- Rate limiting or payment failure (x402) if USDC balance insufficient

## How this service works

Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.

## Output

Returns historical price data points for the specified Polymarket market, including timestamps and price values showing how market odds evolved over time for the given condition ID.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "condition_id": {
   "type": "string",
   "description": "Required query param"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockrun-ai-96e88310/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from blockrun.ai](https://www.zero.xyz/host/blockrun.ai/llms.txt)