US midterms odds and recap with x402

Temporary: these three routes retire on 8 November 2026.

Three x402 routes read the US midterm election markets. Each is a GET with no inputs, paid per call in USDC on Base or Solana, and answers JSON. Odds are market prices, not forecasts. Data only, not advice.

Choose a route

Route	Price	What it returns
`GET /midterms-alpha`	0.01 USDC	House, Senate and Balance of Power control, plus the 10 most-traded races. Each comes with its Polymarket odds, its 24-hour move, the money in trades of $1,000 or more behind that move, the net flow of the five biggest wallets and the USD it takes to move the odds 5 points. Each also carries its price on Polymarket US, Kalshi and PredictIt, named by venue. Refreshed every 2 minutes.
`GET /midterms-movers`	0.01 USDC	The fastest 15-minute and 24-hour Polymarket odds moves across open midterm markets (control, Senate, governor and House races). Plus a board of up to 150 markets with live odds, 15-minute, 1-hour and 24-hour moves, and each row’s price on Polymarket US, Kalshi and PredictIt, named by venue. Refreshed every minute.
`GET /midterms-recap`	0.05 USDC	A short news-anchor update on the Polymarket midterms odds, rewritten at most every 15 minutes from Otto’s own midterms data. It opens with control of the House and Senate and which way the markets are moving, then the big moves. A headline, 150 to 250 words of plain prose, and every cited figure as data.

A venue’s price appears only where that venue lists the race. Otherwise the row marks it as not listed, or as unavailable when the venue could not be read.

Make the first request

curl -i https://x402.ottoai.services/midterms-recap

The unpaid request answers 402 Payment Required. Its body and its PAYMENT-REQUIRED header carry the accepts array: USDC on Base (eip155:8453) or on Solana, with the amount in the token’s smallest unit (50000 is 0.05 USDC). Pay one entry with any x402 client, then send the same request again to receive the data. The HTTP API page covers the payment client, receipts and failures.

Read the result

Read status first: success or failed. On success, data holds the route’s figures. The OpenAPI document lists each route’s current description, price and networks.

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US midterms odds and recap with x402

Choose a route

Make the first request

Read the result

​Choose a route

​Make the first request

​Read the result

Choose a route

Make the first request

Read the result