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Polymarket APIs, Data and Developer Tools

Build your integration with the right combination of APIs, SDKs, streams and data infrastructure.

How to choose developer tools

Which component does your integration need next?

  • Choose the data or action first: market discovery, books, wallet activity or order operations.
  • Use an SDK for a language-specific client, or a CLI for command-line workflows.
  • Treat historical datasets, live streams and infrastructure as separate integration decisions.
All categoriesData APIs81SDKs & libraries25Historical data34MCP servers29Official developer tools10Streaming data17CLI tools9On-chain data6Starter projects & resources6
118 tools · 49–60 shown

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Find the right tools

METAR.ws: Metar Ws — WebSocket METAR API — connect in 3 lines
METAR.ws3.5Editorial
Data feed

Stream airport observations and station-level weather-model signals for temperature-market research without maintaining a GRIB parsing pipeline.

  • Access API
Myriad: Prediction-market cards with probabilities and category navigation
Myriad3.5Editorial
Platform

Trade outcome shares on Myriad’s AMM or order-book markets, with portfolio claims, maker rebates and developer tools for integrations.

  • Access Web · API · CLI
Numinous Tools: Agent skill overview and installation paths.
Numinous Tools3.5Editorial
SDK

Add Numinous forecasts, sourced market signals and credit-usage checks to a compatible coding or research agent.

  • Language Python
Octagon Ai — product overview
Octagon3.5Editorial
Research tool

Read source-linked prediction-market research, compare model probabilities with prices and access the analysis through reports, API, MCP or a trading CLI.

  • Access Web · API · CLI · MCP
OddsPipe: Cross-venue market and spread API overview.
OddsPipe3.5Editorial
Data API

Find matched Polymarket and Kalshi contracts, filter match confidence and query price differences through REST or Python.

  • Data coverage Markets · Prices · Cross-venue matches
  • Access API
Opinion — product overview
OPINION3.5Editorial
Platform

Trade macro, crypto and other outcome markets through OPINION’s order-book exchange, with maker incentives and public developer interfaces.

  • Access Web · API
OrcaLayer — wallet leaderboard and filters
OrcaLayer3.5Editorial
Analytics

Research wallet skill and consensus while filtering reward-farming activity out of the results.

  • Access Web · Telegram · API
PaperPoly: Paper-trading market browser with live probabilities and topic filters.
PaperPoly3.5Editorial
Platform

Practice with a $1,000 virtual bankroll and use a journal to review your decisions.

  • Trading mode Paper
  • Access Web · MCP
pmxt archive: Public mirror index identifying PMXT V1 and V2 capture windows.
pmxt archive3.5Editorial
Dataset

Access the earlier PMXT Polymarket capture eras through a public mirror, with version-specific formats and documented coverage gaps.

  • Access Parquet, Python, DuckDB
PMXT hosted API: PMXT API entry page and SDK example.
PMXT hosted API3.5Editorial
Data API

One hosted API key for cross-venue market search, matching, historical data and supported prediction-market trading methods.

  • Data coverage Markets · Events · Order books · Prices · Cross-venue matches
  • Access API
PMXT open-source SDK: PMXT repository overview and supported venue families.
PMXT open-source SDK3.5Editorial
SDK

Use Python or TypeScript clients with a common prediction-market interface, targeting hosted PMXT or a locally run backend.

  • Language Python · TypeScript
PolyBackTest: Historical Up/Down strategy research with a provider backtest example.
PolyBackTest3.5Editorial
Dataset

Replay crypto Up/Down markets using historical order-book depth and timestamped data.

  • Access Web · API