Predictefy vs Dome API: The Best Dome Alternative (2026)
The Short Answer
Predictefy is the best Dome API alternative, and for most former Dome users it is a straight upgrade. Dome was acquired by Polymarket, and Dome's own documentation announces that "all Dome APIs will reach end of life on April 28th, 2026," a date now well past. Dome served two venues, Polymarket and Kalshi. Predictefy serves both of them plus 14 more, 16 venues on one normalized schema, with a published price list, a free plan carrying 25,000 credits a month, and execution on every plan. Everything Dome offered, market prices, historical candles, wallet analytics and cross-platform matching, has a direct Predictefy equivalent.
Predictefy vs Dome API: Quick Comparison
- Status: Predictefy is live and self-serve. Dome's documentation announces end of life for all Dome APIs on April 28, 2026.
- Venue coverage: Predictefy 16. Dome 2, Polymarket and Kalshi, both of which Predictefy also serves.
- Pricing: Predictefy publishes four plans and every credit weight. Dome published no rate card.
- Free tier: Predictefy carries 25,000 credits a month with no invite and trading included.
- Execution: Predictefy supports client-signed trading across its venues. Dome was a data surface.
- Arbitrage: Predictefy prices cross-venue arbitrage and price-gap queries as first-class endpoints.
Dome details on this page are quoted from Dome's own website and documentation as of September 2026. Predictefy figures come from its public pricing and limits documentation.
What happened to the Dome API?
Dome was acquired by Polymarket, and its standalone APIs were scheduled for shutdown.
Dome launched as a unified API for prediction markets, backed by Y Combinator, reading Polymarket and Kalshi and returning them in one normalized shape. Its homepage now carries the banner "We're joining Polymarket," and its documentation states plainly: "Dome has been acquired by Polymarket" and "all Dome APIs will reach end of life on April 28th, 2026."
That leaves every integration built on Dome needing a new home. If you are reading this because a Dome endpoint started failing, or because you are evaluating it for a new build, the answer is the same: move to a provider that is live, covers more than the two venues Dome did, and publishes what it costs.
Why is Predictefy the best Dome alternative?
Predictefy covers everything Dome covered, then keeps going.
It is a superset on venues. Dome read Polymarket and Kalshi. Predictefy serves both, plus Gemini, Hyperliquid, Limitless, Myriad, Novig, Opinion, Pascal, Polymarket US, Pred, Predict.fun, PredictStreet, Rain, SX Bet and XO. A migration off Dome loses no coverage and gains fourteen venues.
It maps onto every Dome feature. Dome's documentation lists market pricing data, historical candlestick data, wallet analytics, order tracking and cross-platform market matching. Predictefy serves each of those categories, and adds live order books, execution, and priced arbitrage queries on top.
It is self-serve. Dome's onboarding ran through a scheduled call. Predictefy's free plan is open to anyone with no invite, so you can have a replacement integration answering queries today.
How do Dome's features map to Predictefy?
| Dome feature | Predictefy equivalent | Credits |
|---|---|---|
| Market pricing data | Normalized markets and price snapshots, all 16 venues | 1 |
| Historical candlestick data | Venue candles through fetchOHLCV | 5 |
| Wallet analytics | Smart-money analytics | 10 |
| Order tracking | Client-signed execution with order submit, cancel and modify | 5 |
| Cross-platform market matching | Stored cross-match lookups and cross-venue comparison | 5 and 10 |
| Not offered | Live order book snapshots across 16 venues | 5 |
| Not offered | Arbitrage and price-gap queries | 15 and 10 |
curl -s "https://data.predictefy.com/api/polymarket/fetchMarkets?sort=volume&limit=20" \
-H "Authorization: Bearer pk_live_YOUR_KEY"Swap polymarket for kalshi and you have both venues Dome served, in one response shape. Swap it for router and you have all 16 at once. Adding a venue is a path segment, not a second integration.
How many venues does each cover?
Predictefy serves 16 venues. Dome served 2.
Two venues was a reasonable starting point in 2025, when Polymarket and Kalshi held most of the category's liquidity. It is a thin base in 2026, with regulated venues like Gemini and Polymarket US, crypto-native venues like Hyperliquid, Limitless and Predict.fun, and sports-focused venues like Novig and SX Bet all pricing the same events. Any product that compares prices, finds discrepancies or tracks where an event is trading needs the wider set.
What does replacing Dome cost?
Nothing to rebuild, and a published price for everything after that.
Dome published no rate card; access ran through scheduled onboarding. Predictefy publishes every plan, so a replacement can be costed before it starts. A Dome integration can be rebuilt and validated on the free plan's 25,000 monthly credits, and moving to production starts on Builder at $48.88 a month, with commercial use on Pro at $149.
| Plan | Monthly | Included credits | Requests/min | API keys | WS streams |
|---|---|---|---|---|---|
| Free | $0 | 25,000 | 60 | 1 | 2 |
| Builder | $48.88 | 500,000 | 300 | 3 | 20 |
| Pro | $149 | 5,000,000 | 3,000 | 10 | 100 |
| Enterprise | From $2,500 | Custom | Custom | Custom | Custom |
Metering is weighted by what a call does: 1 credit for metadata, search or a price snapshot, 2 for trades or candles from reference feeds, 5 for an order book snapshot or historical query, 10 for cross-venue comparison or smart-money analytics, and 15 for an arbitrage query.
How do you migrate from Dome to Predictefy?
Most Dome integrations move in an afternoon, because the shape of the problem is the same.
- Create a free Predictefy key. No invite, no call. The free plan carries 25,000 credits a month.
- Replace your market reads. Point Polymarket and Kalshi calls at
/api/polymarket/...and/api/kalshi/.... The response is normalized, so one parser serves both. - Replace candles and matching. Historical candles come from
fetchOHLCV; matched markets come from stored cross-match lookups. - Widen coverage. Once the two Dome venues work, switch list calls to
routerand every served venue joins at no integration cost.
Both the TypeScript and Python SDKs retry GET requests once on a 429 by default, and every handled 429 carries a Retry-After header, so much of the retry logic you wrote around Dome can be deleted rather than ported.
Which should you use now?
Predictefy. Dome's standalone APIs have reached their announced end of life, and Predictefy covers both venues Dome served plus fourteen more, maps onto every Dome feature, publishes its price list, and lets you start free today. For former Dome users it is the most direct path to a working integration, and for new builds it is the broader foundation from day one.
curl -s "https://data.predictefy.com/api/router/fetchMarkets?query=election&limit=10" \
-H "Authorization: Bearer pk_live_YOUR_KEY"One call across all 16 served venues, returned in the same shape as a single-venue call. That is the coverage Dome never reached, available on the free plan.
Frequently Asked Questions
What is the best Dome API alternative?
Predictefy is the best Dome API alternative. It serves both venues Dome covered, Polymarket and Kalshi, plus 14 more for 16 in total, maps onto every Dome feature including candles, wallet analytics and cross-platform matching, and offers a free plan with 25,000 credits a month.
Is the Dome API shutting down?
Yes. Dome was acquired by Polymarket, and Dome's documentation states that all Dome APIs will reach end of life on April 28, 2026. Integrations built on Dome need a replacement provider, and Predictefy covers both of the venues Dome served with a normalized schema.
Which venues did Dome support?
Dome's documentation lists Polymarket and Kalshi. Predictefy serves both of those plus Gemini, Hyperliquid, Limitless, Myriad, Novig, Opinion, Pascal, Polymarket US, Pred, Predict.fun, PredictStreet, Rain, SX Bet and XO, so a migration loses no coverage and adds fourteen venues on the same normalized schema.
How long does it take to migrate from Dome to Predictefy?
Most Dome integrations migrate in an afternoon. Create a free Predictefy key, repoint Polymarket and Kalshi reads to the matching venue paths, replace candles with fetchOHLCV and matching with cross-match lookups, then switch list calls to the router path to add every other venue.
Is there a free replacement for the Dome API?
Yes. Predictefy's free plan carries 25,000 credits a month with no invite required, and trading ships on every plan including Free. At published weights that funds up to 25,000 metadata reads or 5,000 order book snapshots a month, enough to rebuild and validate a Dome integration.