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Polymarket APIs, data and developer tools | Page 6

Start with the data or action your application needs, then choose a compatible interface and access model. This family covers building blocks for research applications, data systems and trading integrations.

How to choose developer tools

Choose the building block

  • APIs supply documented datasets or actions; SDKs and GitHub libraries help integrate them into code.
  • Historical datasets support retrospective work, while streams provide ongoing updates.
  • MCP servers expose tools to assistants; command-line tools offer a different operating interface.
  • Indexing tools and builder resources support data infrastructure and application development.

Check compatibility before integrating

Compare programming languages, runtime and deployment requirements, API coverage and entitlements. A repository can supply code without granting access to a hosted dataset. Read the relevant software and data licensing terms.

Separate public research reads from account operations. Establish the credentials and permissions needed for each action before enabling them in your application or agent. Move to infrastructure tools when the main task is running the service rather than choosing its data interface.

All categoriesData APIs88SDKs & libraries25Historical data38MCP servers29Official developer tools10Streaming data19CLI tools10On-chain data6Starter projects & resources13
135 tools · 61–72 shown

Narrow your search

Find the right tools

METAR.ws WebSocket METAR API introduction and connection example
METAR.ws
Data feed3.5Editorial

Stream airport reports and station-level model signals for weather research without building a GRIB parsing pipeline.

  • Access API
Myriad prediction-market cards with probabilities and category navigation
Myriad
Platform3.5Editorial

Trade outcome shares after distinguishing the market model, order behavior and applicable fee schedule.

  • Access Web · API · CLI
Numinous Tools agent-skill overview and installation paths
Numinous Tools
SDK3.5Editorial

Request forecasts and market evidence from an agent while tracking separately metered API usage.

  • Language Python
Octagon product overview.
Octagon
Research tool3.5Editorial

Source-linked event reports, model-price comparisons and developer access through API, MCP and CLI.

  • Access Web · API · CLI · MCP
OddsPipe cross-venue market and spread API overview
OddsPipe
Data API3.5Editorial

Find paired contracts, filter match confidence and investigate cross-venue price differences through REST or Python.

  • Access API
OPINION product overview
OPINION
Platform3.5Editorial

An outcome order-book venue where matched-fill fees and minimum charges matter alongside headline rates.

  • Access Web · API
OrcaLayer wallet leaderboard and filtering controls.
OrcaLayer
Analytics3.5Editorial

Read-only Polymarket wallet research with farming filters, monitoring and licensed data access.

  • Access Web · Telegram · API
PaperPoly paper-market browser with current probabilities and topic filters
PaperPoly
Platform3.5Editorial

Practice market selection and position accounting with virtual funds, a journal and optional assistant-driven paper orders.

  • Trading mode Paper
  • Access Web · MCP
Public archive index showing PMXT V1 and V2 capture windows
pmxt archive
Dataset3.5Editorial

Download earlier Polymarket book captures from the public mirror and inspect the coverage of each era.

PMXT API entry page with an SDK example
PMXT hosted API
Data API3.5Editorial

Search and match markets across venues, retrieve history and use supported trading methods with one hosted key.

  • Access API
PMXT repository overview and supported venue families
PMXT open-source SDK
SDK3.5Editorial

Use one Python or TypeScript interface across supported prediction venues, with an explicit hosted or local backend choice.

  • Language Python · TypeScript
PolyBackTest historical Up/Down research with a provider backtest example
PolyBackTest
Dataset3.5Editorial

Replay short crypto rounds against recorded liquidity and keep Data API and AI-backtest entitlements separate.

  • Access Web · API