{"id":321,"date":"2025-12-15T08:00:06","date_gmt":"2025-12-15T08:00:06","guid":{"rendered":"https:\/\/blog.axomap.com\/?p=321"},"modified":"2025-12-25T08:09:15","modified_gmt":"2025-12-25T08:09:15","slug":"6-startups-building-apis-middleware-for-prediction-markets","status":"publish","type":"post","link":"https:\/\/blog.axomap.com\/index.php\/2025\/12\/15\/6-startups-building-apis-middleware-for-prediction-markets\/","title":{"rendered":"6 Startups Building APIs &amp; Middleware for Prediction Markets"},"content":{"rendered":"\n<p id=\"block-af0b0f3a-fa56-4031-813a-632963c3cc9b\"><em>This post is part of a series covering the Prediction Market ecosystem. You can view <a href=\"https:\/\/axomap.com\/map_view\/prediction-market-ecosystem-1766135570349x669381823198920700\">the\u00a0full interactive map with more than 60 startups here<\/a>.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\" id=\"block-6125510d-1fa0-427c-b73d-2612d7c46018\"><a href=\"https:\/\/axomap.com\/map_view\/prediction-market-ecosystem-1766135570349x669381823198920700\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"573\" src=\"http:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-1024x573.png\" alt=\"\" class=\"wp-image-322\" srcset=\"https:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-1024x573.png 1024w, https:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-300x168.png 300w, https:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-768x430.png 768w, https:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-1536x860.png 1536w, https:\/\/blog.axomap.com\/wp-content\/uploads\/2025\/12\/screen-PM-2048x1146.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p><em>This market map represents the &#8220;financialization of information&#8221; (Think of Polymarket and Kalshi as the current main exchanges). In this ecosystem, world events are treated like stocks, and the tools below are what traders, developers, and everyday users use to navigate this new economy.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Prediction Markets APIs &amp; Middleware<\/h2>\n\n\n\n<p>This category acts as the\u00a0<strong>&#8220;Connective Tissue&#8221;<\/strong>\u00a0of the ecosystem. While Layer 1 provides the exchanges, Layer 2 middleware and APIs provides the tools that make those marketplaces accessible, searchable, and programmable for the rest of the world.<br><\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>What are Prediction Markets APIs &amp; Middleware?<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The Big Picture:<\/strong>\u00a0This category is the essential &#8220;plumbing&#8221; that translates raw, complex blockchain data into a format that apps and humans can actually use. It provides a standardized way to plug into multiple prediction markets at once without needing to build custom code for every individual platform.<\/li>\n\n\n\n<li><strong>Role in the Layer System:<\/strong>\u00a0Positioned directly between the primary exchanges (Layer 1) and the user facing apps (Layer 3), this layer abstracts away the &#8220;messy&#8221; technical details. It ensures that if an exchange updates its technology, the apps built on top of it don&#8217;t break.<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>What are the core value provided by these tools?<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Aggregation:<\/strong>\u00a0It creates a &#8220;Single Point of Entry,&#8221; allowing a developer to see prices from Polymarket, Kalshi, and others through one single window.<\/li>\n\n\n\n<li><strong>Real-Time Speed:<\/strong>\u00a0It provides high-speed data streams (WebSockets) that are critical for professional trading and instant price updates.<\/li>\n\n\n\n<li><strong>Intelligence Injection:<\/strong>\u00a0Beyond just raw numbers, tools in this category often &#8220;clean&#8221; the data, adding AI-driven confidence scores or sentiment analysis to help users understand\u00a0<em>why<\/em>\u00a0a price is moving.<\/li>\n\n\n\n<li><strong>Cost Efficiency:<\/strong>\u00a0Instead of every startup building their own expensive data servers, they &#8220;rent&#8221; the infrastructure from these providers.<\/li>\n\n\n\n<li><strong>Cross-Chain Translation: <\/strong>They allow an app built on Solana to easily read and interact with a market that lives on Polygon or Base, which is vital for a unified global &#8220;Truth Market.&#8221;<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>Who are the main users?<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>App Developers:<\/strong>\u00a0Founders building the next generation of betting interfaces, social apps, or news sites that need live odds.<\/li>\n\n\n\n<li><strong>Quant Traders &amp; Bot Builders:<\/strong>\u00a0Professional traders who need high frequency data to run automated arbitrage or hedging strategies.<\/li>\n\n\n\n<li><strong>AI Researchers:<\/strong>\u00a0Teams building &#8220;Agentic&#8221; models that need to read and react to market truths in real-time.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6 Startups Building APIs &amp; Middleware for Prediction Markets<\/h2>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/68a68a2b9ee5805f5aea077a494c14b4.cdn.bubble.io\/cdn-cgi\/image\/w=96,h=96,f=auto,dpr=2,fit=contain\/f1766135759411x869554900577996200\/Dome.png\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/domeapi.io\">Dome<\/a><\/p>\n<\/div>\n\n\n\n<p>\ud83c\uddfa\ud83c\uddf8 US &#8211; Data Provider &#8211; PreSeed &#8211; YCombinator<\/p>\n\n\n\n<p><strong>What is Dome?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dome is a\u00a0<strong>unified prediction market API and developer infrastructure layer<\/strong>\u00a0that gives builders real time and historical data across multiple prediction market platforms (including Polymarket and Kalshi) through one consistent interface.<\/li>\n\n\n\n<li>It enables apps, bots, and analytic tools to pull market prices, orderbook snapshots, wallet data, cross-platform market matching and more without building separate integrations for each exchange.<\/li>\n\n\n\n<li><strong>Project type<\/strong>: Dome is\u00a0<strong>YC-backed<\/strong>, having been accepted into Y Combinator\u2019s Fall 2025 batch.<\/li>\n\n\n\n<li><strong>Targets<\/strong>: They target\u00a0<strong>developers, ecosystem builders, traders, quants, and product teams<\/strong>\u00a0that need prediction market data and infrastructure to power analytics dashboards, automated trading bots, middleware layers, portfolio tools or any other product that consumes prediction market information programmatically.<\/li>\n\n\n\n<li><strong>Monetization:<\/strong>\u00a0Follows a\u00a0<strong>tiered API model<\/strong>\u00a0with\u00a0<strong>free tier access<\/strong>. Info is accessible only through contacting them.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Unified multi-platform API<\/strong>. Provides a single integration point that aggregates data from Polymarket, Kalshi and other supported platforms into a consistent schema, reducing development overhead.<\/li>\n\n\n\n<li><strong>Comprehensive real-time and historical datasets<\/strong>. Exposes live market data, historical price and orderbook history, wallet analytics and filtered search endpoints useful for backtesting and research workflows.<\/li>\n\n\n\n<li><strong>SDKs and developer tooling<\/strong>. Offers multi-language SDKs (e.g., TypeScript, Python) and WebSocket\/webhook support so builders can integrate and stream updates efficiently.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/68a68a2b9ee5805f5aea077a494c14b4.cdn.bubble.io\/cdn-cgi\/image\/w=96,h=96,f=auto,dpr=2,fit=contain\/f1766135855143x182116544142106880\/azuro.png\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/azuro.org\/#intro\">Azuro<\/a><\/p>\n<\/div>\n\n\n\n<p>\ud83d\udcb5 Seed &#8211; Exchange Infrastructure<\/p>\n\n\n\n<p><strong>What is Azuro?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Azuro is a\u00a0decentralized on-chain prediction market infrastructure protocol\u00a0that provides smart contract powered tooling, liquidity pooling and real-time data feeds to enable developers and third-party apps <strong>to build, host and scale prediction market applications<\/strong>.<\/li>\n\n\n\n<li>It functions as a base layer for prediction markets rather than a single consumer-facing app.<\/li>\n\n\n\n<li>Project type: Azuro\u00a0<strong>has raised institutional funding<\/strong>\u00a0and is backed by venture and strategic investors.<\/li>\n\n\n\n<li>Targets: They target\u00a0<strong>developers, prediction markets builders, data integrators and third-party platforms.<\/strong><\/li>\n\n\n\n<li><strong>Monetization:<\/strong>\u00a0Protocol operations are tied to on-chain economic incentives. While core data and contract interaction are permissionless,\u00a0revenue and protocol fees come from market activity and token economics\u00a0(e.g., liquidity provider returns and governance via AZUR tokens) rather than simple free access.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Core protocol infrastructure.<\/strong>\u00a0A modular on chain system of smart contracts that manage liquidity, odds calculation and payouts for prediction markets without centralized intermediaries.<\/li>\n\n\n\n<li><strong>Developer SDKs and APIs.<\/strong>\u00a0Offers indexed subgraph data feeds (e.g., via The Graph) and APIs for real-time and historical market data, enabling external apps to consume this information programmatically.<\/li>\n\n\n\n<li><strong>Shared liquidity and oracle support.<\/strong>\u00a0Uses a singleton liquidity pool model and supports oracle feeds, making liquidity and settlement mechanics composable for any app built on Azuro.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/68a68a2b9ee5805f5aea077a494c14b4.cdn.bubble.io\/cdn-cgi\/image\/w=96,h=96,f=auto,dpr=2,fit=contain\/f1766139160213x349303745887871360\/polybased.jpg\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/polybased.xyz\">Polybased<\/a><\/p>\n<\/div>\n\n\n\n<p>Data Provider &#8211; Indie Hacker &#8211; Open Source<\/p>\n\n\n\n<p><strong>What is Polybased?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A\u00a0<strong>developer-focused SDK and data access layer<\/strong>\u00a0that provides real-time prediction market information, including market odds, liquidity, historical data and order book streams.<\/li>\n\n\n\n<li>It is designed so builders can integrate Polymarket data and trading capabilities into their own applications.<\/li>\n\n\n\n<li><strong>Project type<\/strong>: Polybased is an\u00a0independent open source project\u00a0driven by contributors in the prediction market and developer community.<\/li>\n\n\n\n<li><strong>Targets<\/strong>: Built for\u00a0developers, traders, quants, bots and third-party apps\u00a0that need a programmatic interface to ingest live and historical Polymarket market data.<\/li>\n\n\n\n<li><strong>Monetization:<\/strong>\u00a0The project appears to be\u00a0<strong>open source and free to use<\/strong>, distributed with MIT licensing for its SDK.<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Real-time data SDK.<\/strong>\u00a0Exposes live market metrics such as current odds, volumes, and order book changes via WebSocket and REST interfaces in a developer-friendly package.<\/li>\n\n\n\n<li><strong>Historical data access.<\/strong>\u00a0Allows retrieval of past prices, trades and snapshots useful for analytics, backtesting and signal generation.<\/li>\n\n\n\n<li><strong>Trading integration layer.<\/strong>\u00a0Provides tools not just for data but for placing, canceling and managing orders when building bots and automated strategies.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/cdn.brandfetch.io\/goldsky.com?c=1idAef6JMXX_Ye_dVX8\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/goldsky.com\">Goldsky<\/a><\/p>\n<\/div>\n\n\n\n<p>\ud83c\uddfa\ud83c\uddf8 US &#8211; \ud83d\udcb5 Seed &#8211; Data Provider<\/p>\n\n\n\n<p><strong>What is Goldsky:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Goldsky is a\u00a0<strong>r<\/strong>eal-time blockchain data infrastructure platform\u00a0that provides high-performance indexing, streaming APIs, subgraphs and decoded on-chain feeds across many markets, including dedicated support for prediction market datasets such as Polymarket.<\/li>\n\n\n\n<li><strong>Project type<\/strong>:<strong> VC-backed.<\/strong>\u00a0Goldsky has raised institutional funding and is positioned as an enterprise grade Web3 data provider used by major protocols and apps.<\/li>\n\n\n\n<li><strong>Targets<\/strong>: Built for\u00a0developers, protocol builders, analytics teams and third-party apps\u00a0that need reliable real time and historical blockchain data to power their products.<\/li>\n\n\n\n<li><strong>Monetization:<\/strong>\u00a0Offers a\u00a0<strong>tiered API and infrastructure model<\/strong>\u00a0with a free tier to get started, and paid plans or enterprise support for higher throughput, custom pipelines and production-grade SLAs.\u00a0<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cross-market blockchain indexing and streaming.<\/strong>\u00a0Provides real-time indexed data, decoded events and customized pipelines across many blockchains and markets, including prediction market feeds used by platforms like Polymarket.<\/li>\n\n\n\n<li><strong>Scalable infrastructure and tooling.<\/strong>\u00a0Designed with enterprise-grade reliability, compatibility with existing stacks, and data pipelines that support high throughput and resilience.<\/li>\n\n\n\n<li><strong>Multi-use case support.<\/strong>\u00a0Beyond prediction markets, Goldsky serves a broad set of data needs across DeFi, wallets, analytics platforms, gaming and more, making it a general blockchain data backbone.\u00a0<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/68a68a2b9ee5805f5aea077a494c14b4.cdn.bubble.io\/cdn-cgi\/image\/w=96,h=96,f=auto,dpr=2,fit=contain\/f1766141046969x936802049844372400\/polyfacts.png\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/www.polyfactual.com\">Polyfactual<\/a><\/p>\n<\/div>\n\n\n\n<p>Indie Hacker<\/p>\n\n\n\n<p><strong>What is Polyfactual?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>An\u00a0<strong>AI-driven prediction intelligence provider<\/strong>\u00a0that generates probabilistic forecasts and confidence signals about real-world events and distributes them for reuse by third-party applications in the prediction market ecosystem.<\/li>\n\n\n\n<li><strong>Project type<\/strong>: \u00a0Independent project (Indie Hacker type).<\/li>\n\n\n\n<li><strong>Targets<\/strong>: Built for\u00a0developers, trading apps, bots, and analytics platforms\u00a0that want to ingest machine generated predictions as an input, as well as advanced traders who consume the same signals directly.<\/li>\n\n\n\n<li><strong>Monetization:<\/strong>\u00a0Uses a\u00a0token based access model. Advanced predictions and AI analysis are paid for using the POLYFACTS token, suggesting a pay-per-signal or usage based middleware economy rather than a free analytics site.<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prediction-as-a-Service layer<\/strong>. Produces AI-generated outcome probabilities and confidence scores that can be embedded into external products, dashboards, or automated trading systems.<\/li>\n\n\n\n<li><strong>Machine readable intelligence output<\/strong>. Designed so forecasts are consumed programmatically, positioning Polyfactual closer to a belief or signal provider than a human first interface.<\/li>\n\n\n\n<li><strong>Context enrichment via news and market data<\/strong>. Uses live information feeds and market signals to continuously update predictions supplied downstream.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/68a68a2b9ee5805f5aea077a494c14b4.cdn.bubble.io\/cdn-cgi\/image\/w=96,h=96,f=auto,dpr=2,fit=contain\/f1766401252509x482436431682284200\/astron.png\" alt=\"\" style=\"width:57px;height:auto\"\/><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><a href=\"https:\/\/www.astron.markets\">Astron Markets<\/a><\/p>\n<\/div>\n\n\n\n<p>Indie Hacker &#8211; Trading Bot Infra<\/p>\n\n\n\n<p><strong>What is Astron Markets?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Astron Markets is a\u00a0<strong>decentralized AI-agent trading ecosystem<\/strong>\u00a0for prediction markets that uses autonomous agents and predictive intelligence to generate signals, execute strategies, and power downstream trading applications.<\/li>\n\n\n\n<li>Project type: Independent \/ indie hacker type<\/li>\n\n\n\n<li><strong>Targeted users\/customers: <\/strong>Developers, quantitative traders.<\/li>\n<\/ul>\n\n\n\n<p><strong>Major and distinctive features (product is still WIP):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Autonomous AI agents: <\/strong>A network of agents designed to observe market state, generate predictions, and either feed signals to tools or\u00a0autonomously execute strategies\u00a0in prediction markets according to configurable logic.<\/li>\n\n\n\n<li><strong>Predictive intelligence layer: <\/strong>Agents ingest market data, news, and other signals, distilling them into probability forecasts and actionable signals that can be consumed by other tools, bots, or terminals.<\/li>\n\n\n\n<li><strong>Delivery: <\/strong>The product is primarily delivered as a\u00a0<strong>decentralized agent ecosystem and API infrastructure<\/strong>\u00a0rather than a standalone app or visual dashboard. Users interact with it through integrations, APIs, or agent execution engines rather than a front-end UI.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This category covers the infrastructure layer that powers prediction markets. These APIs and middleware tools aggregate data, normalize market signals, and enable real-time access across platforms like Polymarket or Kalshi. They turn fragmented market data into programmable intelligence that developers, traders and AI agents can reliably build on.<\/p>\n","protected":false},"author":1,"featured_media":326,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[20],"class_list":["post-321","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-competitive-landscapes","tag-prediction-markets"],"_links":{"self":[{"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/posts\/321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/comments?post=321"}],"version-history":[{"count":3,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":327,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/posts\/321\/revisions\/327"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/media\/326"}],"wp:attachment":[{"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/media?parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/categories?post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.axomap.com\/index.php\/wp-json\/wp\/v2\/tags?post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}