Compare
Two to four listings side by side, from what each product's own pages say and the earlier Kairos listing.
Earlier-listing fields are what the Kairos catalogue said at the time, and website metadata can describe a publisher rather than the product. Neither confirms who runs a service, its current price or its regulatory status. Download this comparison as CSV
| Field |  |  |
|---|---|---|
| Product overview | Kalshi operates an event-contract exchange and provides developer interfaces for market data and trading. Its documentation separates prediction contracts from perpetual futures, and its account guide describes age, identity-verification and jurisdiction conditions. | Predictefy offers normalized prediction-market data, matched markets and execution workflows through an API, SDK, CLI and MCP. Its documentation distinguishes venue-specific capabilities, paper trading and optional live execution. One interface does not imply identical support at every venue. |
| Research classification | Prediction-market products | Prediction-market products |
| Resource type | Product or service | Product or service |
| Platforms named in product context | Kalshi | Not established |
| Latest sourced pricing | Kalshi’s help page describes transaction fees that depend on the contract and market. Some markets also charge makers when resting orders execute. The exchange’s current fee schedule and order display govern the applicable charge; a single universal percentage would be misleading. | Monthly API plans are listed as Free $0, Builder $48.88, Pro $149 and Enterprise by contract. Included monthly credits are 25,000/250,000/2 million for the first three tiers. Builder top-ups are $11/100,000 credits and Pro $5.50/100,000; call costs, rate limits and feature entitlements are separate constraints. |
| Access requirements | The account guide requires users to be at least 18 and complete requested identity checks. International access has jurisdiction restrictions. | Not established |
| Developer access | The exchange documents REST, WebSocket and FIX interfaces, a demo environment and an MCP connector. | Not established |
| Product distinction | Prediction-contract and perpetual-futures APIs are documented separately. Their fee and margin rules should not be mixed. | Not established |
| Free-tier limits | Not established | Free lists 25,000 credits/month, 60 requests/minute, one key, two streams and paper trading with ten open orders. Arbitrage plans and replay are excluded. |
| Execution boundary | Not established | The beta MCP guide says live execution and collateral tools are off by default and require explicit enablement. Paper trading is a separate simulation. |
| Commercial-use condition | Not established | The terms require a separate commercial enterprise licence for competing public data APIs built from Predictefy streams. |
| Capability: Command-line tools | Not established | The product advertises a CLI for market research and connected-venue workflows. |
| Capability: Data API | Developer interfaces cover market data and trade execution. | Not established |
| Capability: Developer SDK | Not established | A software development kit or language client is described. |
| Capability: MCP tools | The documentation links an assistant connector for market research, portfolio reads and alerts. | The documentation provides an MCP server with explicit live-execution enablement. |
| Capability: WebSocket delivery | WebSocket interfaces are documented for the exchange products. | Not established |
| Developer and product resources | Pricing: https://help.kalshi.com/en/articles/13823805-fees; About the product: https://help.kalshi.com/en/articles/13823778-signing-up-as-an-individual; Documentation: https://docs.kalshi.com/welcome | Pricing: https://predictefy.com/en/pricing; Documentation: https://docs.predictefy.com/; Documentation: https://docs.predictefy.com/guides/mcp/ |
| Website research check | 2026-11-03T16:55:00.957827+00:00; A dated public product or documentation page was reviewed. This establishes the source of the listed facts, not tested functionality, operating health, security or account eligibility. | 2026-11-03T16:46:57.121366+00:00; A dated public product or documentation page was reviewed. This establishes the source of the listed facts, not tested functionality, operating health, security or account eligibility. |
| Vultax assessment | Not assessed | Not assessed |
| Website | https://kalshi.com/ | https://predictefy.com/ |
| Evidence | View source (opens in a new tab) Observed Full profile | View source (opens in a new tab) Observed Full profile |
Earlier descriptions come from the Kairos catalogue by its contributors, used under CC BY 4.0. Attribution and licences.