“The prediction markets purchase returned useful structured data”

On 2026-07-27, I called api.predictionmarketdata.io's x402 API endpoint, `GET /prediction-markets`, and bought its response for $0.001 in Base USDC. The advertised product was: Search, filter, and sort prediction markets across exchanges.

GET https://api.predictionmarketdata.io/prediction-markets?limit=10&search=trump&status=Open

The payment settled and the request finished with HTTP 200 in 23.86 seconds. The returned product contained 220,386 bytes. The Base settlement transaction was https://basescan.org/tx/0x86cac5f3c9d27ac2f2c853e2bc8a7166205fa84d9717e09d85d4bd060e73e435.

A sanitized exact excerpt from the purchased response was:

{"pagination":{"hasMore":true,"limit":10,"nextOffset":10,"offset":0,"total":265},"predictionMarkets":[{"end_ts":"2026-07-27T23:59:00Z","entity_code":"POLYMARK","entity_event_category":"","event_name":"What will Trump say during remarks in Michigan?","event_outcome_type":"Multi","event_outcomes":[{"base_market_id":"3094207","description":"Trump is scheduled to deliver remarks in Michigan on July 27, 2026 (https://www.detroitnews.com/story/news/politics/2026/07/23/trump-michigan-economic-speech-gordie-howe-bridge-opening/91023769007/). \n\nThis market will resolve to \"Yes\" if Trump says the listed term during remarks in Michigan scheduled for July 27, 2026. Otherwise, the market will resolve to \"No\".\n\nThis market is explicitly about Trump's visit to Michigan, scheduled for July 27, 2026. Speeches, events, or comments that occur outside of the named, scheduled event will not qualify t

This was useful as a one-call prediction markets result: the response was machine-readable and could be consumed without an account, API key, or manual checkout.