Prediction Market Data API

Name: PredictionMarketDataAPI real-time data feed
Creator: PredictionMarketDataAPI
Published: 2026-11-07T08:02:30.673Z

Verified data provider predictionmarketdataapi.com api.realtimeapi.ai/v1/predictiondata

Prediction market odds for agents: prediction market prices, implied probabilities, volumes, movers, resolutions and history for AI agents, derived from public Polygon chain data (Polymarket exchange contracts). Pay per request in USDC over x402, or use an API key.

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SERVICE QUALITY · 30 DAYS Status page

VIA REALTIMEAPI · P50 · 24H 19.6x faster

115 ms vs 2.26 s direct from PredictionMarketDataAPI

1 of 7 endpoints edge-cached · see data speed & quality report

price / callfrom $0.005

endpoints7

uptime 30d99.64%

saved / call2.14 s

Data Endpoints 7

4 groups

CALIBRATION1

GET /calibration Calibration of market prices (Pro) $0.015

MARKETS4

GET /markets Search and list markets $0.005 GET /markets/{market_id} One market with every outcome $0.01 GET /markets/{market_id}/consensus Cross-venue consensus $0.015 GET /markets/{market_id}/history Price history as OHLC bars (Pro) $0.02

MOVERS1

GET /movers Biggest probability moves $0.01

RESOLVED1

GET /resolved Recently resolved markets $0.01

The PredictionMarketDataAPI provides prediction market prices, implied probabilities, volumes, movers, resolutions, and history for AI agents. Data is derived from public Polygon chain data (Polymarket exchange contracts). Payment options include pay-per-request in USDC over x402 or using an API key. Endpoints include calibration, market search, movers, resolved markets, and market history.

GET /calibration · Calibration of market prices (Pro) · docs

paste into Claude, Cursor or ChatGPT

Use the RealtimeAPI PredictionMarketDataAPI feed to answer with live data.

Endpoint: GET https://api.realtimeapi.ai/v1/predictiondata/calibration
What it does: Calibration of market prices (Pro)

How to call it:
- MCP (preferred): connect https://mcp.realtimeapi.ai/mcp/predictiondata
  and call the matching tool.
- HTTP: send the request with header X-API-Key: $RTAPI_KEY,
  or pay $0.015 per call in USDC on Base via x402.

Docs and OpenAPI: https://api.realtimeapi.ai/feeds/predictiondata/openapi.json

Fetch the latest response, then summarise the key numbers
and what they mean right now.

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GET/calibration

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Data pricing plans

Why a time pass? Much faster requests: no payment round-trip on each call, just send your keyOne payment: pay once in USDC, then call freely until the pass expiresLower cost per call: from $0.0001 / call at full use of a 30-day passWorks anywhere: a plain X-API-Key header, no wallet signing in your code

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Your agent pays with x402

// One 402 round-trip buys a time pass key for every feed (returned once)
const res = await pay("https://api.realtimeapi.ai/purchase/pass/hourly", { method: "POST" });
const { api_key, expires_at } = await res.json();

An x402 client pays once at /purchase/pass/{plan} and gets one key for every feed. Plans: /hourly, /daily, /weekly, /monthly. Or prepay USDC credits for every feed from your dashboard.

Free key covers all feeds, 1,000 calls / month · get one in seconds

SPEED

Faster through RealtimeAPI

Before and after: 1 of 7 endpoints are answered from our edge cache instead of a round trip to PredictionMarketDataAPI, 19.6x faster at the median.

Cached answers from Cloudflare's edge in 300+ cities, measured every 5 minutes.The same data PredictionMarketDataAPI serves, refreshed on its schedule: freshness shown per endpoint, and every answer says how old the copy is (X-RTAPI-Data-Age).One API key for every feed.Pay per call in USDC (x402), buy a 1-hour, 1-day, 7-day or 30-day pass, or prepay USDC credits.MCP tools for agents: Claude, Cursor or any MCP client can call this feed directly.

MEDIAN RESPONSE TIME (P50) · 24 HOURS

19.6x faster

Direct to PredictionMarketDataAPI2.26 s

Through RealtimeAPI115 ms

19.6xfaster at p50

2.14 ssaved per call

1 / 7endpoints accelerated

How we measure: before is a direct call to PredictionMarketDataAPI from Cloudflare's edge (successful probes only); after is what an API-key caller gets at the edge: the read of our cached copy at the same edge location plus the gateway's own time per request. A cache miss adds the provider's time. Both leave out the agent-to-edge leg, which is the same either way. 24-hour p50 and p95, updated hourly. Last updated 2026-11-08 22:07 UTC.

Accelerated endpoints 1

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GET/calibration 2.26s / 3.12s 115ms / 176ms 19.6x ≤ 6 h

Showing 1 of 1 accelerated endpoints Full speed report on the status page →

6 endpoints are always served live from PredictionMarketDataAPI (data changes faster than every 5 minutes, or per-request lookups).

Frequently asked questions

About pricing, keys and agent access for the PredictionMarketDataAPI feed.

What data is provided?

Prediction market prices, implied probabilities, volumes, movers, resolutions, and history.

How is data derived?

From public Polygon chain data (Polymarket exchange contracts).

What are the payment options?

Pay-per-request in USDC over x402 or using an API key.

What endpoints are available?

Calibration, market search, movers, resolved markets, and market history.

How much does it cost?

$0.005 per request

Provider Meta

machine-readable resources for agents and tooling

OpenAPI 3.1 MCP server Status & uptime llms-full.txt

Prediction Market Data API

Data Endpoints 7

Faster through RealtimeAPI

Accelerated endpoints 1

Frequently asked questions

Provider Meta

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Prediction Market Data API

Data Endpoints 7

Faster through RealtimeAPI

Why use RealtimeAPI

Accelerated endpoints 1

Frequently asked questions

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