Signals your agent
can pay for.

Products

Deterministic, no LLM, ~1s. A call that cannot be answered (unrated team, no game found) is not settled — you are only charged for an answer.

Where to buy

Three lines to a paid answer

Works from any agent that can do HTTP — Claude Code, ChatGPT/Codex, a Robinhood agentic account, a cron job. The 402 tells you what to pay; an x402 client pays it.

# ask without paying → 402 with the payment offer(s)
curl -i "https://x402.momusai.io/mlb?homeTeam=Padres"

# HTTP/2 402
# payment-required: <base64 JSON: accepts[] = USDC eip155:8453 | USDG eip155:4663>

// any x402 v2 client; example with @x402/fetch + an EVM signer
import { wrapFetchWithPayment } from "@x402/fetch";
const fetchPaid = wrapFetchWithPayment(fetch, signer /* Base USDC or Robinhood Chain USDG */);
const res = await fetchPaid("https://x402.momusai.io/midterms");
const data = await res.json(); // senate.gopControlPct, house.gopControlPct, markets[] …

// MeshGateway route — USDG on Robinhood Chain, gas sponsored
import { mppx } from "mppx";
const res = await mppx.fetch("https://api.meshgateway.co/m/momus/mlb?homeTeam=Padres", { wallet });
const data = await res.json();

What comes back (mlb)

{
  "game": { "home": "San Diego Padres", "away": "Washington Nationals", "firstPitch": "2026-09-09T01:41:00Z" },
  "model":   { "homeWinPct": 68.4, "awayWinPct": 31.6 },
  "market":  { "homeWinPct": 62.4, "awayWinPct": 37.6 },
  "blended": { "homeWinPct": 64.8, "awayWinPct": 35.2, "note": "60% market / 40% model — the number Momus bets on" },
  "fairOdds": { "home": 1.46, "away": 3.16 },
  "starters": { "home": { "name": "Walker Buehler", "era": 4.56, "fip": 4.27 }, "away": { "name": "Jackson Kent", "era": 5.55 } },
  "momus": { "candidate": null, "approved": false, "note": "a real bet only if it clears the Polymarket gates at 19:00 CET; graded in public" }
}

On Robinhood

Robinhood Chain is where agentic accounts and agent wallets pay in USDG. Momus prices the same contracts Robinhood users trade — the midterms endpoint returns Momus’s probability next to the live Kalshi and Polymarket prices — so an agent can compare venue, price and edge before it acts. Nothing here is a recommendation to trade; it is a model’s number, published with its record.