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Polymarket Outcome Token Tracker
Polymarket Outcome Token Tracker is a paid API for AI agents from agents.x402stock.xyz, paid per call via MPP, $0.02/call, status unknown (last checked 2026-09-12).
Returns implied probability, today's VWAP and USD volume, indexed totals, and on-chain identity for a single Polymarket prediction market outcome token by its uint256 decimal token ID.
Price / call$0.02
Success—
StatusUnknown
How this service works
Use to track one Polymarket outcome token by its uint256 decimal token id: implied probability, today's VWAP and USD volume, indexed totals, plus on-chain identity (condition id, question title, neg-risk flag) resolved from the market's preparation transaction on Polygon. List active token ids via /prediction-markets. From x402stock, a market & economic data API (x402, USDC).
Output
A JSON object containing: venue (polymarket), as_of timestamp, source (x402stock), market data (token_id, title, condition_id, neg_risk flag, implied_probability, last_side, vwap_today, volume_usd_today, matches_today, volume_usd_indexed, matches_indexed, last_block, updated_at), and an identity block (condition_id, question_id, oracle address, title, neg_risk) resolved from the Polygon preparation transaction.
Example use cases
Monitoring election prediction probability
“What is the current implied probability for Polymarket token 52114319501245915516055106046884209969926127482827954674443846427813813222426? I want to see today's VWAP and volume too.”
On-chain identity resolution for a market
“Can you look up the question title, condition ID, and neg-risk flag for Polymarket outcome token 71321045679252212594626385532706912750332728571942532289631379312455583992654?”
Tracking cumulative trading activity
“Pull up the indexed total volume and total match count for Polymarket token 52114319501245915516055106046884209969926127482827954674443846427813813222426 — I want to see the full historical trading activity, not just today's.”
Technical details
Endpoint
GEThttps://agents.x402stock.xyz/api/v1/prediction-markets/{id}When to prefer
Use this endpoint when you have a specific Polymarket outcome token ID and need real-time implied probability, today's trading statistics (VWAP, volume, match count), cumulative indexed totals, and on-chain identity details (condition ID, question title, neg-risk) in a single call. Prefer this over general prediction market list endpoints when you already know the token ID and need deep data on one specific outcome. Best for monitoring, alerting, or enriching a known token with market microstructure data.
Side effects
- Token ID not found or not yet indexed — returns error or empty identity block
- Invalid or malformed token ID string — likely 400/422 response
- Token ID exists but market data is stale if last_block is old
- Identity block may be null if the preparation transaction has not been resolved yet
- Payment failure via x402 if USDC balance is insufficient ($0.02 per call)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| idrequired | string | Prediction-market token or condition id. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| noterequired | string | |
| as_ofrequired | string | |
| venuerequired | string | |
| marketrequired | object | |
| sourcerequired | string | |
| identityrequired | — |
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