PredictWidget

What it is

A two-line embed: a <div> with a class and a data-mode attribute, followed by a <script> tag loading widget.js from PredictWidget's own domain. The script calls PredictWidget's API and renders one of two cards into the div.

• Featured — a single event with up to ten outcomes, each on a probability bar. The event is whichever one PredictWidget's /events/featured endpoint returns. On 30 September 2026 that was Presidential Election Winner 2028.
• List — between one and ten events, each showing its title, image and leading outcome with a percentage, from the /events/top endpoint. The site's own documentation says these are "the most active prediction markets by 24-hour trading volume".

Every card links each market to its Polymarket event page and carries a "PREDICTWIDGET • LIVE ODDS" line linking to PredictWidget's site. That is the whole product. No account, no key, no dashboard, and nothing to configure beyond the attributes above. The site says it runs on Cloudflare's network.

The widget carries its own styling (neutral colours, the system font stack, no dark variant) and exposes no theme setting. The FAQ answers the question "can I customize the appearance?" by saying it is designed to blend in.

Availability

Anyone can paste it, and there is no signup to be refused. api.predictwidget.com answered normally on 30 September 2026. Prices and images come through PredictWidget's API and an Amazon S3 bucket rather than from Polymarket's domain, so the widget loads from its own hosts.

The widget is indifferent to whether your readers can act on what it shows. Every link goes to polymarket.com, the international platform. Its terms bar trading from the United States, the United Kingdom and more than thirty other countries, as set out on the Polymarket card. The terms of service say the service is not intended for anyone under 18, and they make the publisher responsible for complying with local law.

Pricing

Free. The FAQ says so twice and explains why: "We earn affiliate commissions when users click through to Polymarket from our widgets." The terms carry a matching affiliate disclosure (section 12).

The code does not bear that out, and the gap matters to a publisher. In the widget.js served on 30 September 2026, every market link is a bare polymarket.com/event/<slug> URL with no referral parameter. So whatever arrangement PredictWidget has with Polymarket is not visible in the markup on your page, and there is no field for your own affiliate code. A publisher in Polymarket's affiliate programme earns nothing from clicks on this widget. Polymarket's own embed builder has that field.

Markets & resolution

Only Polymarket's international markets, and only the ones PredictWidget's API ranks at the top. On 30 September 2026 that was politics-heavy: the 2028 US presidential winner, the 2028 Democratic nominee and a question on Putin leaving office. You get the categories the volume leaders happen to be in that week. Nothing here resolves anything. According to the FAQ, a market that has ended displays its final winning outcome.

The list view reduces each event to one "leader" and one number, and on a date-ladder event that misleads. On 30 September 2026 the Putin event appeared as "June 30, 2027 — 10.5%". That is the highest-priced rung of a set of by-date markets. It is not the event's answer, and a reader skimming a sidebar will take it as one.

Integrations

Plain HTML and a script tag. It works wherever a CMS allows third-party JavaScript. It does not work in a newsletter, or on a platform like Substack that strips scripts; Substack has its own native Polymarket embed, described on the Polymarket Embeds card.

api.predictwidget.com answers unauthenticated requests. It is not offered as a product, has no documentation and appears in the terms only as something that "rate limiting applies" to, so do not build on it.

Limitations

• You cannot choose the market. This is the limitation that decides the purchase. An article about the Fed cannot embed the Fed market. It gets whatever leads on volume that day, which may be about something else entirely.
• It does not refresh. Both FAQs promise five-second updates, one in the words "update automatically every 5 seconds". The script served on 30 September 2026 has no timer and no polling loop. It fetches once on page load. The five seconds is the max-age the API sets on its responses.
• "Other leading platforms" is not in the product. The home page says the widget pulls "from Polymarket and other leading platforms". The code and both endpoints are Polymarket only.
• An outbound link you did not write. Every widget adds a "PREDICTWIDGET • LIVE ODDS" link to predictwidget.com, opened in a new tab with no rel attribute. The terms forbid you to "remove or obscure copyright notices or attribution", so the link stays.
• An anonymous operator. No company, person or address appears anywhere on the site. The terms let the operator "modify, suspend, or discontinue the Service at any time without notice". If the domain lapses, the empty box is on your page.
• Signs of a quiet product. The terms and privacy policy are both dated 18 December 2025, the script is versioned 2025121604, and the footer reads © 2025. The API was still returning current markets on 30 September 2026, but nothing on the site has visibly changed since December.

Alternatives

Polymarket Embeds is Polymarket's own free builder. It embeds the specific market you choose, with a chart, and it has a field for your affiliate code. To control everything, build the widget on the Polymarket Gamma API and the Polymarket CLOB API.