api.predictionmarketdata.io
Your prediction markets dashboard. View most active contracts, market news, and trading activity across all major exchanges.
SearchLiveeip155:8453Exactvia cdp
Calls · 30d
8↓ 5.1%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$1.48
Verified settled volume
1,133 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
8
Calls · 30d
Upstream's own call count for this endpoint, not ours.
6
Unique payers · 30d
Last called 2026-09-08 23:28Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x995c0abdcd2ad76548e5f7deb54d32549b2b781fThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x995c0abdcd2ad76548e5f7deb54d32549b2b781f",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.predictionmarketdata.io/prediction-markets",
"mimeType": "",
"description": "Search, filter, and sort prediction markets across exchanges."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": "10",
"search": "trump",
"status": "Open"
}
},
"output": {
"type": "json",
"example": {
"pagination": {
"limit": 2,
"total": 30834,
"offset": 0,
"hasMore": true,
"nextOffset": 2
},
"predictionMarkets": [
{
"end_ts": "2026-06-23T00:30:00Z",
"is_series": true,
"event_name": "Game 3: San Antonio at New York",
"entity_code": "KALSHI",
"event_ticker": "KXNBAGAME-26JUN08SASNYK.KALSHI",
"event_outcomes": [
{
"status": "Open",
"volume": 7872349.97,
"market_id": "KXNBAGAME-26JUN08SASNYK-NYK_yes.KALSHI",
"percentage": 0.54,
"outcome_name": "New York"
}
],
"pmcs_categories": [
"SPT",
"BSKTBL",
"NBA"
],
"event_outcome_type": "Multi",
"entity_event_category": "Sports"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "string",
"description": "Maximum number of events to return."
},
"offset": {
"type": "string",
"description": "Zero-based pagination offset."
},
"search": {
"type": "string",
"description": "Free-text query across market and event names."
},
"status": {
"type": "string",
"description": "Market status. Open is the safest default."
},
"sort_by": {
"type": "string",
"description": "Sort key, e.g. total_volume_24hr, total_open_interest_usd, end_ts."
},
"sort_dir": {
"type": "string",
"description": "Sort direction: asc or desc."
},
"volume_max": {
"type": "string",
"description": "Maximum total volume filter."
},
"volume_min": {
"type": "string",
"description": "Minimum total volume filter."
},
"entity_code": {
"type": "string",
"description": "Exchange filter. Common: KALSHI, POLYMARK, GMNI."
},
"event_ticker": {
"type": "string",
"description": "Exact event identifier (from a prior /prediction-markets response)."
},
"outcome_type": {
"type": "string",
"description": "Outcome model. Common: Binary, Multi."
},
"searchString": {
"type": "string",
"description": "Legacy alias for search; prefer search."
},
"pmcs_category": {
"type": "string",
"description": "Top-level PMCS category code from /prediction-markets/taxonomy."
},
"queryCriteria": {
"type": "string",
"description": "Legacy advanced query field; prefer search."
},
"volume_1hr_max": {
"type": "string",
"description": "Maximum 1-hour volume filter."
},
"volume_1hr_min": {
"type": "string",
"description": "Minimum 1-hour volume filter."
},
"trade_count_max": {
"type": "string",
"description": "Maximum trade count."
},
"trade_count_min": {
"type": "string",
"description": "Minimum trade count."
},
"pmcs_supersector": {
"type": "string",
"description": "PMCS supersector code from /prediction-markets/taxonomy."
},
"open_interest_max": {
"type": "string",
"description": "Maximum open interest (USD)."
},
"open_interest_min": {
"type": "string",
"description": "Minimum open interest (USD)."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x995c…b781f. The signed payment is good for 5 minutes.
- Paid to
- 0x995c…b781f
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x995c0abdcd2ad76548e5f7deb54d32549b2b781f",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": "10",
"search": "trump",
"status": "Open"
}
},
"output": {
"type": "json",
"example": {
"pagination": {
"limit": 2,
"total": 30834,
"offset": 0,
"hasMore": true,
"nextOffset": 2
},
"predictionMarkets": [
{
"end_ts": "2026-06-23T00:30:00Z",
"is_series": true,
"event_name": "Game 3: San Antonio at New York",
"entity_code": "KALSHI",
"event_ticker": "KXNBAGAME-26JUN08SASNYK.KALSHI",
"event_outcomes": [
{
"status": "Open",
"volume": 7872349.97,
"market_id": "KXNBAGAME-26JUN08SASNYK-NYK_yes.KALSHI",
"percentage": 0.54,
"outcome_name": "New York"
}
],
"pmcs_categories": [
"SPT",
"BSKTBL",
"NBA"
],
"event_outcome_type": "Multi",
"entity_event_category": "Sports"
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "string",
"description": "Maximum number of events to return."
},
"offset": {
"type": "string",
"description": "Zero-based pagination offset."
},
"search": {
"type": "string",
"description": "Free-text query across market and event names."
},
"status": {
"type": "string",
"description": "Market status. Open is the safest default."
},
"sort_by": {
"type": "string",
"description": "Sort key, e.g. total_volume_24hr, total_open_interest_usd, end_ts."
},
"sort_dir": {
"type": "string",
"description": "Sort direction: asc or desc."
},
"volume_max": {
"type": "string",
"description": "Maximum total volume filter."
},
"volume_min": {
"type": "string",
"description": "Minimum total volume filter."
},
"entity_code": {
"type": "string",
"description": "Exchange filter. Common: KALSHI, POLYMARK, GMNI."
},
"event_ticker": {
"type": "string",
"description": "Exact event identifier (from a prior /prediction-markets response)."
},
"outcome_type": {
"type": "string",
"description": "Outcome model. Common: Binary, Multi."
},
"searchString": {
"type": "string",
"description": "Legacy alias for search; prefer search."
},
"pmcs_category": {
"type": "string",
"description": "Top-level PMCS category code from /prediction-markets/taxonomy."
},
"queryCriteria": {
"type": "string",
"description": "Legacy advanced query field; prefer search."
},
"volume_1hr_max": {
"type": "string",
"description": "Maximum 1-hour volume filter."
},
"volume_1hr_min": {
"type": "string",
"description": "Minimum 1-hour volume filter."
},
"trade_count_max": {
"type": "string",
"description": "Maximum trade count."
},
"trade_count_min": {
"type": "string",
"description": "Minimum trade count."
},
"pmcs_supersector": {
"type": "string",
"description": "PMCS supersector code from /prediction-markets/taxonomy."
},
"open_interest_max": {
"type": "string",
"description": "Maximum open interest (USD)."
},
"open_interest_min": {
"type": "string",
"description": "Minimum open interest (USD)."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-08 23:28Z
- Last indexed by Roundhouse
- 2026-09-24 09:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-14 16:16Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.predictionmarketdata.io and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.predictionmarketdata.io' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.predictionmarketdata.io/prediction-markets, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.