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x402-factory Prediction Market Movers Delta (Keyset)
x402
x402-factory Prediction Market Movers Delta (Keyset) is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns only prediction market entries that have materially moved since a given cursor, enabling efficient incremental polling without re-fetching unchanged markets.
Price / call$0.01
Success—
StatusUnknown
How this service works
Only the materially-moved markets changed since your cursor (delta of /v1/movers — Keyset delta of /v1/movers: pass since=<next_cursor from your last call> and get only the materially-moved markets added or changed after it, plus changed_count and a new next_cursor. Omit since once to bootstrap. Cursors are stable across restarts. Poll the free sibling /v1/movers/changes for counts and pay only…
Output
Returns a JSON object with a data field containing: rows (array of changed markets, each with slug, question, category, current probability p, previous probability prev_p, numeric delta, and changed_at timestamp), changed_count (total number of changed markets), next_cursor (opaque string to use in the next poll), and as_of (timestamp of the snapshot). Also includes a meta object.
Example use cases
Incremental political market monitoring
“I want to track political prediction markets efficiently — fetch only the markets that moved since cursor eyJsYXN0X2lkIjoxMjM0fQ and tell me which questions changed probability, what the new and old values are, and give me the next cursor so I can keep polling.”
Bootstrap fresh market change feed
“I've never polled this before — fetch the prediction market movers delta without a since cursor to bootstrap a starting position, then tell me the next_cursor value I should save for future incremental calls.”
Cost-controlled market change alerting
“I only want to pay for data that actually changed — give me the delta of prediction market movers since cursor eyJuZXh0IjoiMjAyNC0wNiJ9xyz, show me the changed_count, and list any markets whose probability shifted by more than 5 percentage points.”
Technical details
Endpoint
GEThttps://x402-factory.com/v1/movers/deltaWhen to prefer
Use this endpoint when you need to efficiently poll for prediction market changes without re-fetching the entire movers list. It is ideal for agents that periodically sync market state, want to minimize API costs by fetching only changed rows, and need stable cursor-based pagination across restarts. Prefer the free sibling /v1/movers/changes for checking counts before deciding whether to pay for the full delta.
Side effects
- Invalid or expired cursor returns an error or resets pagination
- Omitting 'since' bootstraps from now, returning no historical rows — intentional but can surprise first-time callers
- Payment failure (402) if USDC payment via x402 protocol is not properly included
- Empty rows array if no markets have moved since the cursor — changed_count will be 0
- Rate limiting or network errors returning 429 or 5xx responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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