Tool detail

Otto AI

Returns the 25 highest-volume open Polymarket prediction markets with live odds, bid/ask, spread, volume, liquidity, and price change, refreshed every 5 minutes.

Categories: Market prices, Prediction markets

Use when

see top Polymarket prediction markets by volume right now
get live odds and spread for active prediction markets
gauge market sentiment from prediction-market probabilities

Not for

not a single-market lookup — returns the top 25 by volume only
not other prediction-market platforms — Polymarket only

Inputs

GET request, no parameters

Admitted input schema

{
  "type": "object",
  "properties": {},
  "required": [],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://x402.ottoai.services/pm-markets

Payment

Protocol: x402
Listed price: 0.001 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://x402.ottoai.services/pm-markets
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z