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Predge Kalshi Market Outcome Attestation
x402
Predge Kalshi Market 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 2026-09-15).
Returns a cryptographically signed (ed25519) attestation of a Kalshi prediction market's settled resolution, verifiable offline.
Price / call$0.02
Success—
StatusUnknown
How this service works
Cryptographically SIGNED settled-KALSHI-outcome ATTESTATION for one market (path param: ticker, a Kalshi market ticker). Returns the market's SETTLED resolution (resolved, resolution yes|no, resolved_at) as an ed25519-signed envelope verifiable OFFLINE against the SAME published key as /v1/attest. Optional query param: side (yes|no) — adds correct (true iff it matches the resolution, null while unsettled). Data source: Kalshi's public market API (no key, no account); this attests the MARKET's own result, NOT trader data. A market that exists but has not settled returns resolved:false. 404 (not charged) for an unknown ticker.
Output
A JSON envelope containing resolved (true/false), resolution ('yes' or 'no' if settled), resolved_at (ISO timestamp if settled), an ed25519 signature over the payload verifiable against Predge's published public key, and optionally a 'correct' boolean if a 'side' query param was supplied. Unsettled markets return resolved:false with null resolution fields. Unknown tickers return a 404 with no charge.
Example use cases
Verify settled prediction market outcome
“I need a cryptographic proof that the Kalshi market KXELECTION-24NOV05 has settled and what it resolved to — can you pull a signed attestation for it?”
Confirm correctness of a yes position
“Check whether the 'yes' side was the winning side on Kalshi market KXBTC-24DEC31-B50000 and give me a signed attestation I can verify offline.”
Audit resolved market for smart contract use
“I need a tamper-proof, ed25519-signed record of the resolution for Kalshi ticker KXFED-24DEC31 — has it settled, and what was the outcome?”
Technical details
Endpoint
GEThttps://api.predge.io/v1/kalshi/attest/:tickerWhen to prefer
Use this endpoint when you need cryptographic, offline-verifiable proof of a Kalshi market outcome — especially for smart contracts, trustless settlement workflows, or audit trails where trusting a raw API response is insufficient. Prefer this over querying Kalshi directly when you need a signed attestation rather than plain data, or when you want to verify a specific side's correctness in a single call.
Side effects
- 404 returned for unknown or non-existent Kalshi ticker (not charged)
- resolved:false with null resolution/resolved_at when market exists but has not yet settled
- Stale data if Kalshi's public API is delayed or temporarily unavailable
- Signature verification failure if the published key has rotated and client cache is stale
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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