Narwhal unifies Kalshi and Polymarket odds on economics, central banks, metals and energy. OddsPapi aggregates sports odds from 350+ bookmakers, including Kalshi and Polymarket. Choose by market coverage before comparing interfaces or quotas.
Choose Narwhal for economic and commodity odds with REST, MCP, history and paid WebSocket access. Choose OddsPapi for sports fixtures across hundreds of bookmakers.
OddsPapi's cited guides cover sports; Narwhal's prediction catalogue excludes sports, politics and crypto markets. Narwhal API is owned and operated by Nusantara Ventures, LLC.
| Requirement | Narwhal API | OddsPapi |
|---|---|---|
| Free tier | ✓ 5,000 requests/month | ✓ Small quota; published figures conflict |
| Cheapest paid plan | Basic: $59/month; $590/year available | Custom B2C/B2B plans; contact sales |
| Update speed | Free: previous day's close; Basic/Pro: live | WebSocket-first; paid WebSocket push |
| History | Free: 12 months; Basic: 5 years; available records only | Free historical odds endpoint; depth not stated |
| Coverage | Kalshi/Polymarket: economics, central banks, metals, energy | Sports fixtures across 350+ bookmakers |
| Interfaces | REST, MCP; Basic/Pro: WebSocket | Odds API and WebSocket; no official MCP |
| SDKs | ✓ Official Python and TypeScript SDKs | Not published |
| Commercial use on free tier | ✓ Commercial apps; resale needs Enterprise | Not published |
Free quota is below 1,000 monthly requests; paid plans use custom pricing, with no public request-volume prices.
| Requests per month | Narwhal API | OddsPapi |
|---|---|---|
| 1,000 | Free: $0/month | Free quota below 1,000; contact sales |
| 10,000 | Basic: $59/month | Contact sales; price not published |
| 100,000 | Basic: $59/month | Contact sales; price not published |
List prediction topics
The cited OddsPapi sources do not publish authentication details, so this comparison omits a rival request example.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.
OddsPapi suits sports applications needing prices across hundreds of bookmakers, including Kalshi, Polymarket and Polymarket US on its odds endpoint. Guides cover sports fixtures, with WebSocket-first delivery and paid WebSocket push. A historical odds endpoint is described as free; the order-book ladder is live only. Free quota figures conflict. Paid B2C and B2B plans use custom pricing, requiring a sales quote.
Yes. Narwhal Free includes 5,000 successful requests per month, commercial app use and both REST and hosted MCP access. Free covers supported economic and commodity odds at the previous day's close; live odds and WebSocket require Basic or Pro.
OddsPapi's cited guides cover sports fixtures, listing Kalshi, Polymarket and Polymarket US as bookmakers. They establish no economics, politics or commodity coverage. Narwhal covers economic releases, central bank decisions, metals and energy from Kalshi and Polymarket, excluding sports, politics and crypto.
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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