Polymarket price history

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Polymarket price history of one market outcome from the CLOB: time and price points over the last hour, 6 hours, day, week, month or all time, with first, last, change, high and low. Give the market slug and outcome, or a CLOB token id. Use to chart how the odds moved, spot a swing after news, or backtest a signal.

Guide: Polymarket API, prediction market odds

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Try it with your own inputs

The market's Polymarket slug (from polymarket_markets) or its polymarket.com URL

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
slugstringThe market's Polymarket slug (from polymarket_markets) or its polymarket.com URL
outcomestringOutcome name, e.g. Yes or No (default the first outcome)
token_idstringInstead of slug: the CLOB token id of one outcome
intervalstring1h, 6h, 1d, 1w (default), 1m or max. One of: 1h, 6h, 1d, 1w, 1m, max.

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/polymarket/price-history?slug=will-jd-vance-win-the-2028-republican-presidential-nomination"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/polymarket/price-history?slug=will-jd-vance-win-the-2028-republican-presidential-nomination&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "question": "Will JD Vance win the 2028 Republican presidential nomination?",
  "slug": "will-jd-vance-win-the-2028-republican-presidential-nomination",
  "outcome": "Yes",
  "tokenId": "7213…",
  "interval": "1d",
  "points": 24,
  "first": 0.9625,
  "last": 0.948,
  "change": -0.0145,
  "high": 0.9625,
  "low": 0.919,
  "history": [
    {
      "time": "2026-11-04T16:00:22.000Z",
      "price": 0.9625
    }
  ],
  "note": "Polymarket public data at call time; prices are the market's implied probability (0-1). Not financial advice."
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is polymarket_price_history, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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