CoinRithm Prediction Markets API

OUR TAKE / EDITORIAL OPINION

CoinRithm’s resolved outcomes deserve the first inspection

For evaluation work, the end of a market can matter more than its latest price.

Prediction AI Tools editorial desk · Reviewed Oct 8, 2026

CoinRithm describes a cross-venue JSON API covering market data, resolved outcomes, calibration data and whale activity. Its documented access limitations include no uptime SLA and rate limits for heavy use. Our editorial preference would be to begin with the resolved records. A developer interested in evaluating forecasts needs a clear account of what was asked and what ultimately counted as the answer. A convenient live feed does not settle that separate requirement.

We would consider this API for a researcher who has already specified an evaluation dataset or an agent workflow requiring structured market observations. The tradeoff is accessible cross-venue records versus the need to verify that apparently comparable outcomes use compatible definitions. We would also keep a whale feed analytically separate from a calibration exercise unless the research design explains exactly how it belongs.

For a concrete trial, select a small set of resolved questions and reconstruct the forecast target, closing time and final outcome from the returned records and original sources. Identify any excluded or ambiguous cases explicitly. Review the endpoint’s access limitations before designing a larger collection job. The reviewed material positions structured data for agents; it does not establish a built-in forecasting model. We would choose the service if it makes the proposed evaluation reproducible, not merely easy to start.

AI-assisted editorial analysis based on cited documentation; not a hands-on product test.

Sources for this opinion: Source 1 ↗