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Predge Sports Outcome Attestation
x402
Predge Sports Outcome Attestation is a paid API for AI agents from api.predge.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Returns a cryptographically signed (ed25519) attestation of a completed sports game outcome for a given league and event ID, optionally verifying a predicted winner.
Price / call$0.02
Success—
StatusUnknown
How this service works
Real-time alerts on whale traders on Polymarket. Heuristic Insider Watch, wallet scoring 0–100, Bloomberg-style web terminal. Free plan included.
Output
A JSON object containing a signed ed25519 attestation of the game outcome, including: home and away team abbreviations, scores, winner, league, event ID, completion status, scheduled and issued timestamps, data source (ESPN), a canonical JSON string for offline verification, the ed25519 hex signature, the issuer's public key, and an optional 'correct' field indicating whether the queried winner matched the actual winner.
Example use cases
Resolve prediction market sports bet
“I need to resolve my Polymarket market on the MLB game COL at MIL, event ID 401816246 — can you get me a signed attestation confirming COL won so I can use it as proof on-chain?”
Verify NFL game winner for fantasy league
“Can you check whether the Kansas City Chiefs won their NFL game with event ID 401547654 and get me a cryptographically signed proof of the result?”
Audit completed NBA game outcome
“I want a tamper-proof attestation from predge.io for the NBA game with event ID 401765123 — just the final outcome, no need to check a specific winner.”
Technical details
Endpoint
GEThttps://api.predge.io/v1/sports/attest/%7Bleague%7D/%7BeventId%7DWhen to prefer
Choose this endpoint when you need a cryptographically verifiable, offline-auditable proof of a sports game outcome — particularly for resolving prediction market contracts, smart contract oracles, or any use case requiring tamper-proof attestation rather than a plain score lookup. It is especially suited for Polymarket-style markets where you need to prove a specific team won a specific event.
Side effects
- Game not yet completed — returns incomplete/no result
- Invalid league identifier — unrecognized league slug
- Invalid or unknown eventId — no matching event found
- Payment failure — x402 micropayment not completed, returns 402
- Network or upstream ESPN data unavailability — may return stale or error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "sports-outcome",
"issuer": "predge.io",
"verify": "ed25519: verify `signature` (hex) over the UTF-8 bytes of `canonical` using `public_key` (hex, raw 32-byte ed25519). `canonical` is JSON with keys sorted lexicographically and no whitespace.",
"correct": true,
"payload": {
"away": "COL",
"home": "MIL",
"kind": "sports-outcome",
"event": "COL at MIL",
"issuer": "predge.io",
"league": "mlb",
"source": "espn",
"winner": "COL",
"correct": true,
"version": "predge-attest-v1",
"event_id": "401816246",
"completed": true,
"issued_at": "2026-07-25T10:00:00.000Z",
"away_score": 5,
"home_score": 2,
"scheduled_at": "2026-07-24T20:10Z",
"queried_winner": "COL"
},
"version": "predge-attest-v1",
"algorithm": "ed25519",
"canonical": "{\"away\":\"COL\",\"away_score\":5,\"completed\":true,\"correct\":true,\"event\":\"COL at MIL\",\"event_id\":\"401816246\",\"home\":\"MIL\",\"home_score\":2,\"issued_at\":\"2026-07-25T10:00:00.000Z\",\"issuer\":\"predge.io\",\"kind\":\"sports-outcome\",\"league\":\"mlb\",\"queried_winner\":\"COL\",\"scheduled_at\":\"2026-07-24T20:10Z\",\"source\":\"espn\",\"version\":\"predge-attest-v1\",\"winner\":\"COL\"}",
"signature": "3a1f…64-byte-hex…9c",
"data_basis": "Settled game result from ESPN's public scoreboard (final score + winner). Outcome-verified truth, not a prediction — signed so a consumer can verify it offline.",
"public_key": "d75a9807...c7e2a1",
"queried_winner": "COL",
"outcome_verified": true
}
}Tags
x402
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