From Polymarket’s native API (CLOB / Gamma)
Polymarket publishes a CLOB API for orderbook data and a Gamma API for market metadata. Both are useful; both have rough edges (rate limits, missing fields, inconsistent shapes across venues if you also use Kalshi etc.).
Migration shape: usually one search-replace on base URLs. Response shapes are a strict superset — your existing parsers keep working. Add the
x-api-key header and you’re done.
From Dune
Dune is great for ad-hoc SQL; Predexon is built for application-time queries with consistent latency.
Dune still wins for exploratory work and one-off custom aggregations. Predexon wins for anything in your hot application path.
Often the right pattern is: prototype the analysis in Dune, then port to Predexon for production.
From Goldsky / The Graph / a self-built subgraph
If you’re running a Polymarket subgraph or other indexed source, the question isn’t whether yours works — it’s whether the maintenance burden is invisible until it breaks. Self-indexers fail quietly. You discover the gap when a reorg drops events, when a contract upgrade silently changes a field, when your node falls behind and your dashboard is showing stale prices.
The engineering ROI math: a single engineer-hour at most companies costs $100–200 loaded. If your team is putting 5h/month into indexer maintenance and on-call (and most do — it’s just that the cost is hidden in your engineers’ headers), that’s $6k–24k/year. Pro tier ($249/mo = $3k/year) pays for itself even if the only thing it eliminates is your on-call rotation. And if a subgraph outage costs you a degraded trading day, the cost gap is much bigger than that.
If you genuinely enjoy maintaining the subgraph, keep it. If “the subgraph works fine” actually means “nobody’s looked at it in 3 months and I hope nothing has drifted,” migrate.
From a custom Polygon indexer
You probably built this because you needed:- Sub-second confirmed-trade latency → WebSocket trades channel is the same data, no node to run
- Mempool / pending-trade detection → WebSocket pending-trades gives you exactly this
- Cost basis / P&L reconstruction → Wallet P&L is pre-computed
- Full-depth book history → Tick history captures every book update at every granularity
From Kalshi’s native API
Predexon is data-only — execution stays on Kalshi’s native API; use Predexon for everything you read.
Migration checklist
1
Get a Predexon key and validate the response shapes you depend on
The Quickstart gets you running in 5 min. Diff one of your real queries against the Predexon equivalent to confirm fields match.
2
Port one endpoint at a time
Don’t big-bang the migration. Replace one endpoint, ship, verify metrics. Repeat.
3
Add caching and retries while you're in there
See Best Practices. Caching is usually a 10x rate-limit relief on day one.
4
Switch to WebSocket for anything you're polling under 30s
If you were polling Polymarket’s CLOB every second, the equivalent WebSocket subscription is cheaper and faster.
5
Decommission the indexer / proxies you replaced
The point is to delete code, not accumulate it.