Predictefy vs Narwhal API: Prediction Market Data Compared (2026)
The Short Answer
Predictefy is the stronger Narwhal API alternative for developers building a broad prediction-market product. The Predictefy prediction market API covers 15+ venues with normalized contracts, cross-venue matching, books, streaming and client-signed trading. Narwhal's prediction product specializes in economics, central banks, metals and energy on Kalshi and Polymarket. Choose Predictefy for a venue-wide application; evaluate Narwhal's domain-specific data when the job centers on macroeconomic releases and commodity expectations.
Key Takeaways
- Predictefy organizes a broad prediction-market workflow across 15+ venues.
- Narwhal's prediction endpoints focus on economic and commodity outcomes.
- Narwhal Free serves prediction odds from the previous day's close; live odds require a paid plan.
- Keep official economic figures, market expectations and executable contract prices separate.
Product scope and plan access checked on October 27, 2026.
How do Predictefy and Narwhal API compare?
| Requirement | Predictefy | Narwhal API |
|---|---|---|
| Prediction-market focus | Cross-venue discovery, research and trading | Economic, central-bank, metals and energy expectations |
| Venue scope | 15+ prediction-market venues | Kalshi and Polymarket for its covered prediction topics |
| Data organization | Markets, outcomes, events and matched clusters | Topics, events, probability shapes and policy paths |
| Interfaces | REST, WebSocket and beta SDK/MCP packages | REST, MCP and paid prediction-odds WebSocket access |
| Free allowance | 25,000 action credits per month | 5,000 successful requests per month |
| Broader product context | Order books, trader intelligence and client-signed execution | Economics, FX, commodities and calendar APIs alongside predictions |
Why choose Predictefy for a prediction-market backend?
Predictefy starts with venue-native contracts and normalizes them for one application. You can search an economic question, inspect its outcomes and compare it with listings on other venues. The same integration also serves sports, elections and other prediction-market categories.
Cross-venue matching is available on every plan. It gives the application a way to discover related listings while retaining their individual identities and settlement terms. Once the user selects a contract, the application can request its supported book and historical data or subscribe to updates.
Predictefy also connects research to paper trading and client-signed execution. Its Pro arbitrage feed evaluates requested depth, venue fees and resolution equivalence. That is useful when the product needs to move from showing an economic expectation to evaluating a specific venue contract.
What does Narwhal's prediction product cover?
Narwhal groups prediction events under topics such as inflation, employment, central banks, metals and energy. Its reference describes scalar, extreme, timing and binary probability endpoints, plus central-bank policy paths. Those shapes help a developer work with a distribution or a sequence of policy outcomes.
This is a narrower overlap with Predictefy's prediction-market workflow. Narwhal explicitly places sports, politics and crypto outside its prediction coverage. Its other API families supply economic observations, FX data, commodities and calendars, which can be relevant to the same research environment.
A macroeconomic dashboard may want both a published economic reading and the market's expectation for the next release. Preserve the distinction in the interface. An official CPI observation and the probability of a future CPI outcome have different sources, dates and meanings.
How should you compare economic market prices?
Match the exact release and definition. An event about month-over-month inflation differs from one about year-over-year inflation. A central-bank decision at one meeting differs from the policy rate at year end. Similar titles can refer to different outcomes.
Use Predictefy's market and outcome identifiers to inspect the actual contract. Carry its observation timestamp and provenance into your dashboard. When comparing venues, review the release source, cutoff and settlement wording before treating the two prices as the same probability.
Narwhal's prediction reference uses decimal strings for probabilities, UTC timestamps and documented event shapes. Its freshness guide also describes stale prediction events. Preserve those fields when combining economic expectations with other data; a successful response alone does not tell the reader how recently the venue was checked.
How do free access and paid plans differ?
Predictefy Free includes 25,000 credits each month for evaluation, matching and two WebSocket streams. Builder is $48.88 a month with 250,000 credits. Pro is $149 with 2,000,000 credits and adds the arbitrage feed, price-gap feed and replay. Commercial use is an Enterprise contract term, detailed in the plan guide.
Narwhal Free lists 5,000 successful requests a month and 30 requests a minute. REST and MCP share that monthly quota. Its free prediction odds use the previous day's close, while Basic and Pro add live odds and streaming. Its published terms allow commercial products across plans with source attribution; reselling the service as a data feed requires Enterprise licensing.
Choose a plan around the actual update cadence. A daily economic summary and a contract-monitoring screen have different freshness and usage requirements.
How should you evaluate a Narwhal alternative?
- Choose one release, its units and the exact outcome threshold your product needs.
- Find the corresponding venue contracts through Predictefy and compare their settlement terms.
- Record the observation times and distinguish current venue quotes from prior-close values.
- Test a second category and venue that your roadmap requires, then check licensing for the planned product.
Create a Predictefy evaluation key and use the cross-venue guide to build a comparison around your real market question.
Frequently Asked Questions
Is Predictefy a Narwhal API alternative?
Yes, for the prediction-market portion of a product. Predictefy is the stronger choice for broad venue coverage, matched contracts, order books and a connected trading workflow.
Does Narwhal cover sports prediction markets?
Its published prediction scope covers economics, central banks, metals and energy. Narwhal explicitly excludes sports, politics and crypto from that product.
Are Narwhal's free prediction odds live?
The pricing page assigns previous-day-close odds to Free. Basic and Pro provide live odds and WebSocket access.
Are an economic release and a prediction probability the same data?
No. An economic release reports an observed figure. A prediction-market price expresses the market's expectation about a defined contract outcome. Preserve their separate sources and timestamps.
Which Predictefy plan includes cross-venue matching?
Every plan includes matching with stored indicative pair price differences. The arbitrage and price-gap feeds start on Pro. Commercial use is an Enterprise contract term.