Ending soon and expiring prediction market API for Polymarket, Kalshi, and Gemin
Ending soon and expiring prediction market API for Polymarket, Kalshi, and Gemini. Find active markets resolving soon with close time, bid/ask prices, volume, liquidity, venue, and market links.
Asked 100.0x its listed price for its own exampleour last check, 2026-09-24
1 of 1checks answered this week
255 msmedian answer time
$0.001listed price per call
$0.1price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.seerium.xyz/v1/prediction/ending-soon
| Category | Market data |
|---|---|
| Provider host | api.seerium.xyz |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.1 | 255 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"hours": 24,
"limit": 25,
"source": "all"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"hours": {
"description": "Optional resolving-soon window in hours. Defaults to 24.",
"maximum": 168,
"minimum": 1,
"type": "number"
},
"limit": {
"description": "Optional maximum ending-soon markets to return. Defaults to 25.",
"maximum": 100,
"minimum": 1,
"type": "number"
},
"source": {
"description": "Optional prediction market venue filter: polymarket, kalshi, gemini, or all. Defaults to all.",
"enum": [
"polymarket",
"kalshi",
"gemini",
"all"
],
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}