Narwhal combines Kalshi and Polymarket economics, central banks, metals and energy odds in one schema. PolymarketData offers historical Polymarket prices, metrics and L2 order books. Narwhal excludes sports, politics and crypto; PolymarketData has no Kalshi coverage.
Choose Narwhal for Kalshi and Polymarket within its 57 topics, live paid odds and shared REST and MCP. Choose PolymarketData for historical Polymarket metrics and L2 order books, subject to its reuse restrictions.
PolymarketData is independent and not affiliated with Polymarket. Narwhal covers selected topics, excluding sports, politics and crypto. Narwhal API is owned and operated by Nusantara Ventures, LLC.
| Requirement | Narwhal API | PolymarketData |
|---|---|---|
| Free tier | ✓ 5,000 requests/month | Free: 10 requests/minute; last month; no order books |
| Cheapest paid plan | Basic: $59/month; $590/year available | Trader: $60/month |
| Update speed | Free: previous day's close; Basic/Pro: live | Free: 10-minute data; Trader: 1-minute data |
| History | Free: 12 months; Basic: 5 years; available records only | One month to unlimited; standard history starts August 2025 |
| Coverage | Kalshi/Polymarket: economics, central banks, metals, energy | Polymarket prices, metrics and L2 order books; no Kalshi |
| Interfaces | REST, MCP; Basic/Pro: WebSocket | REST; no documented WebSocket or MCP |
| SDKs | ✓ Official Python and TypeScript SDKs | Python SDK |
| Commercial use on free tier | ✓ Commercial apps; resale needs Enterprise | Internal analytics permitted; no resale or redistribution |
Pricing depends on request rate, resolution, history and order books. Annual billing is 25% lower; monthly allowances unpublished.
| Requests per month | Narwhal API | PolymarketData |
|---|---|---|
| 1,000 | Free: $0/month | Not published |
| 10,000 | Basic: $59/month | Not published |
| 100,000 | Basic: $59/month | Not published |
List prediction topics
No rival request example is shown because the pages checked did not publish a base URL and authentication example.
# Change: URL and key
curl \
"https://api.narwhalapi.com/v1/predictions/topics" \
-H "Authorization: Bearer YOUR_API_KEY"Narwhal Free includes 5,000 successful requests each month and permits commercial apps. Use that allowance for a dashboard, scheduled data fetches or an agent integration. Move to Basic for 100,000 monthly requests as usage grows, with the same account and authentication.
REST and hosted MCP reach the same data through one account. Your application can fetch JSON while an agent uses the hosted tools, with every successful call counted once against the shared allowance. One quota makes the combined workload straightforward to budget.
Narwhal gives Kalshi and Polymarket one schema for economic releases, central bank decisions, metals and energy. Events use scalar, binary, extremes and timing shapes and name their official resolution source. Economic events link to the Narwhal endpoint publishing the actual value. Odds history supports intervals from 1 minute to daily.
PolymarketData offers historical Polymarket prices, metrics and L2 order books. Trader costs $60 a month for 1-minute data and books. Pro costs $120 with 3 months of history; Ultra costs $360 for unlimited history. Standard history starts August 2025. Free provides 10-minute data for the last month without books. A Python SDK is available.
Yes. Narwhal Free includes 5,000 successful requests per month, commercial app use and both REST and hosted MCP access. Prediction odds are the previous day's close. Free history covers the last 12 months, within available records.
No. Its terms prohibit resale, redistribution and building reusable datasets. They permit personal, academic, journalism and internal analytics use, and require deleting data on termination.
Replace the request URL and authentication, then map the JSON response into your application's fields. The examples use standard fetch in JavaScript and requests in Python, so integration fits an ordinary HTTP client. Keep your key on the server and carry the response's units, dates and missing values into your display or calculations.
The shared cap applies to successful REST and MCP requests together. There are no automatic overage charges. Basic includes 100,000 monthly requests; quotas reset each month even when you pay yearly.
The comparison uses Narwhal's current public contract and the following first-party competitor pages.
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