Data infrastructureLiveData & Developer Tools

Adjacent

Polymarket: Machine-readable prediction-market indices, rates, and news.

Polymarket support
Partial
Pricing model
Free
Access requirement
Open access
Wallet required
No
Trade execution
None
Last editorial review
Aug 24, 2026

01 · Overview

What is Adjacent?

Adjacent exposes prediction-market reference data through a public delayed JSON API, MCP server, agent skills, and documentation. Best for: Developers and AI agents that need normalized, machine-readable prediction-market context. Less suitable for: Traders seeking direct execution, account management, or guaranteed low-latency feeds. Key limitations: The public API is delayed and intended for information workflows. Coverage, methodology, and freshness should be checked before production use.

APIHistorical DataMCPMarket Analytics

02 · Best for

Who is Adjacent best for?

Best for

Developers and AI agents that need normalized, machine-readable prediction-market context.

Not ideal for

Traders seeking direct execution, account management, or guaranteed low-latency feeds.

Limitations

The public API is delayed and intended for information workflows. Coverage, methodology, and freshness should be checked before production use.

03 · Access & execution

How do access and execution work?

Entity typeData infrastructure
Polymarket supportPartial
Pricing modelFree
Free planYes
Access requirementOpen access
Wallet requiredNo
Trade executionNone
Product statusLive
KalshiManifoldOtherPolymarket

Scope-aware product facts

What to look for

Surfaces

ProductWeb · Supported Evidence

Access modes

Primary workflowOpen access · wallet No · Not required · Non-custodial Evidence

Execution modes

Primary workflowNone · Not supported · Not required Evidence

Pricing offers

Primary productFree plan · $0 Evidence

Data capabilities

Product data · P&LNot applicable · Not applicable Evidence
Product data · Fee accountingNot applicable · Fees included in P&L Evidence
Product data · Rewards accountingNot applicable · Rewards included in P&L Evidence
Product data · Open positions accountingNot applicable · Open positions included in P&L Evidence
Market data · Order book historyNot applicable · Not applicable Evidence

04 · Data provenance

Data provenance

Current coverage: CompleteA transparent record of which official sources were checked and when.

Data originVenue API
PnL methodologyNot applicable
Fees includedNot applicable
Rewards includedNot applicable
Open positions includedNot applicable
Order-book historyNot applicable
Update cadenceDelayed
Review provenance evidence

05 · Public footprint

Public footprint

Current public signals from official platform sources, shown with their observation dates.

Product activity

A transparent record of which official sources were checked and when.

Product statusLive
Tracked by PredAtlas sinceAug 24, 2026
Last editorial reviewAug 24, 2026
Official documentationYes

06 · Sources & review

How was Adjacent reviewed?

Documentation strength: CompleteA transparent record of which official sources were checked and when.

Review pending · Aug 24, 2026

Official product sources were checked for documented identity, scope, access, pricing and limitations. This is not a security audit, performance test or endorsement.