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Predge Polymarket Outcome Attestation
x402
Predge Polymarket 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 the resolved outcome for a specific Polymarket prediction market condition, enabling offline verification of settled results.
Price / call$0.02
Success—
StatusUnknown
How this service works
Cryptographically SIGNED resolved-outcome ATTESTATION for one Polymarket market (path param: 0x… condition id). Returns the SETTLED truth straight off the market row: resolved (bool), resolution (yes|no|null), resolved_at, and outcome_verified: {resolution: true}. Optional query param: side (yes|no) — when given, adds queried_side and correct (true iff side matches the resolution, null while unresolved). Every response carries an "attestation" envelope: an ed25519 signature over a canonical JSON payload plus the issuer's public_key, so any consumer can verify the outcome offline without trusting this endpoint. This is on-chain resolved outcome truth, NOT a prediction or model estimate — the "was this signal actually right", independently-verifiable primitive no other x402 source sells. 404 (not charged) for a condition id unknown to the Predge dataset.
Output
A JSON response containing: resolved (bool indicating if the market has settled), resolution ('yes', 'no', or null if unresolved), resolved_at (ISO timestamp of settlement), outcome_verified object confirming the resolution, and an attestation envelope with an ed25519 signature over the canonical payload plus the issuer's public_key for offline cryptographic verification. If the optional 'side' parameter is provided, also returns queried_side and correct (true if the queried side matches resolution, null if still unresolved). Returns 404 (no charge) if the condition ID is not in the Predge dataset.
Example use cases
Verify whale trader signal accuracy
“After that Polymarket market on the election settled, check whether condition 0x4a7c... resolved yes and confirm if the yes side was correct — I need the signed attestation so I can verify it myself.”
Audit resolved prediction for backtesting
“Pull the signed outcome attestation for Polymarket condition 0x9d1e... so I can confirm whether it resolved and what the final answer was for my backtesting dataset.”
Offline proof of market settlement
“I need to prove to someone that Polymarket condition 0xb2f4... settled as no — can you get me the ed25519-signed attestation I can show them so they don't have to trust your word for it?”
Technical details
Endpoint
GEThttps://api.predge.io/v1/attest/:conditionIdWhen to prefer
Choose this endpoint when you need cryptographically verifiable, offline-provable proof of a Polymarket market's settled outcome rather than a live price or prediction estimate. It is uniquely suited for auditability, backtesting signal accuracy, dispute resolution, or any workflow where you must prove a market outcome to a third party without requiring them to trust this service. It is the only x402 source offering ed25519-signed on-chain resolution attestations for Polymarket conditions.
Side effects
- 404 Not Found: condition ID not present in Predge dataset (not charged)
- Unresolved market: resolved=false, resolution=null, correct=null even with side param
- Invalid condition ID format: malformed 0x hex string may return error
- Signature verification failure: consumer-side issue if public key mismatch or payload tampered
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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