2s
Browse Kalshi regulated prediction markets. Filter by status (open/closed/settled), event_ticker, series_ticker, or specific tickers; page with limit + cursor. Each market returns yes/no bid+ask and last price (in dollars, 0-1 = implied probability), 24h + total volume, liquidity, open interest, open/close times, and result if settled. Read-only mirror of Kalshi's market list (no Kalshi key needed).
TradingLiveeip155:8453Exactvia cdp
Public-recordsIdentifiersAi-agentsUs-gov-datax402
Settlements · 30d
1,178↑ 64%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$15.85
Verified settled volume
A floor: summed over 5,000 of 36,082 verified settlements.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-01 04:13Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5The 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-SIGNATURE required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
"amount": "2500",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"name": "USDC",
"version": "1",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
"amount": "2500",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://2s.io/api/predict/kalshi-markets",
"tags": [
"public-records",
"identifiers",
"ai-agents",
"us-gov-data",
"x402",
"upto-billing",
"ai-gateway",
"agent-infrastructure"
],
"iconUrl": "https://2s.io/icon-512.png",
"mimeType": "application/json",
"description": "Browse Kalshi regulated prediction markets. Filter by status (open/closed/settled), event_ticker, series_ticker, or specific tickers; page with limit + cursor. Each market returns yes/no bid+ask and last price (in dollars, 0-1 = implied probability), 24h + total volume, liquidity, open interest, open/close times, and result if settled. Read-only mirror of Kalshi's market list (no Kalshi key needed).",
"serviceName": "2s"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 1,
"cursor": "example",
"status": "unopened",
"tickers": "example",
"eventTicker": "example",
"seriesTicker": "example"
}
},
"output": {
"type": "json",
"schema": {
"type": "object",
"required": [
"ok",
"items",
"total",
"source"
],
"properties": {
"ok": {
"enum": [
true
],
"type": "boolean"
},
"meta": {
"type": "object",
"required": [
"cursor"
],
"properties": {
"cursor": {
"type": "string",
"nullable": true
}
},
"additionalProperties": false
},
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"ticker",
"eventTicker",
"marketType",
"title",
"yesSubTitle",
"status",
"yesBid",
"yesAsk",
"noBid",
"noAsk",
"lastPrice",
"volume",
"volume24h",
"liquidity",
"openInterest",
"openTime",
"closeTime",
"result"
],
"properties": {
"noAsk": {
"type": "number",
"nullable": true
},
"noBid": {
"type": "number",
"nullable": true
},
"title": {
"type": "string",
"nullable": true
},
"result": {
"type": "string",
"nullable": true
},
"status": {
"type": "string",
"nullable": true
},
"ticker": {
"type": "string",
"nullable": true
},
"volume": {
"type": "number",
"nullable": true
},
"yesAsk": {
"type": "number",
"nullable": true
},
"yesBid": {
"type": "number",
"nullable": true
},
"openTime": {
"type": "string",
"nullable": true
},
"closeTime": {
"type": "string",
"nullable": true
},
"lastPrice": {
"type": "number",
"nullable": true
},
"liquidity": {
"type": "number",
"nullable": true
},
"volume24h": {
"type": "number",
"nullable": true
},
"marketType": {
"type": "string",
"nullable": true
},
"eventTicker": {
"type": "string",
"nullable": true
},
"yesSubTitle": {
"type": "string",
"nullable": true
},
"openInterest": {
"type": "number",
"nullable": true
}
},
"additionalProperties": false
}
},
"total": {
"type": "integer",
"nullable": true,
"description": "Total matching rows upstream; null when unknown."
},
"source": {
"type": "object",
"required": [
"provider",
"url",
"license"
],
"properties": {
"url": {
"type": "string"
},
"license": {
"type": "string"
},
"provider": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"example": {
"ok": true,
"meta": {
"cursor": "example"
},
"items": [
{
"noAsk": 1,
"noBid": 1,
"title": "example",
"result": "example",
"status": "example",
"ticker": "example",
"volume": 1,
"yesAsk": 1,
"yesBid": 1,
"openTime": "example",
"closeTime": "example",
"lastPrice": 1,
"liquidity": 1,
"volume24h": 1,
"marketType": "example",
"eventTicker": "example",
"yesSubTitle": "example",
"openInterest": 1
}
],
"total": 1,
"source": {
"url": "example",
"license": "example",
"provider": "example"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "integer",
"maximum": 100,
"minimum": 1
},
"cursor": {
"type": "string",
"maxLength": 400
},
"status": {
"enum": [
"unopened",
"open",
"closed",
"settled"
],
"type": "string"
},
"tickers": {
"type": "string",
"maxLength": 400,
"description": "Comma-separated tickers."
},
"eventTicker": {
"type": "string",
"maxLength": 120
},
"seriesTicker": {
"type": "string",
"maxLength": 120
}
},
"additionalProperties": false
}
}
},
"output": {
"type": "object",
"required": [
"ok",
"items",
"total",
"source"
],
"properties": {
"ok": {
"enum": [
true
],
"type": "boolean"
},
"meta": {
"type": "object",
"required": [
"cursor"
],
"properties": {
"cursor": {
"type": "string",
"nullable": true
}
},
"additionalProperties": false
},
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"ticker",
"eventTicker",
"marketType",
"title",
"yesSubTitle",
"status",
"yesBid",
"yesAsk",
"noBid",
"noAsk",
"lastPrice",
"volume",
"volume24h",
"liquidity",
"openInterest",
"openTime",
"closeTime",
"result"
],
"properties": {
"noAsk": {
"type": "number",
"nullable": true
},
"noBid": {
"type": "number",
"nullable": true
},
"title": {
"type": "string",
"nullable": true
},
"result": {
"type": "string",
"nullable": true
},
"status": {
"type": "string",
"nullable": true
},
"ticker": {
"type": "string",
"nullable": true
},
"volume": {
"type": "number",
"nullable": true
},
"yesAsk": {
"type": "number",
"nullable": true
},
"yesBid": {
"type": "number",
"nullable": true
},
"openTime": {
"type": "string",
"nullable": true
},
"closeTime": {
"type": "string",
"nullable": true
},
"lastPrice": {
"type": "number",
"nullable": true
},
"liquidity": {
"type": "number",
"nullable": true
},
"volume24h": {
"type": "number",
"nullable": true
},
"marketType": {
"type": "string",
"nullable": true
},
"eventTicker": {
"type": "string",
"nullable": true
},
"yesSubTitle": {
"type": "string",
"nullable": true
},
"openInterest": {
"type": "number",
"nullable": true
}
},
"additionalProperties": false
}
},
"total": {
"type": "integer",
"nullable": true,
"description": "Total matching rows upstream; null when unknown."
},
"source": {
"type": "object",
"required": [
"provider",
"url",
"license"
],
"properties": {
"url": {
"type": "string"
},
"license": {
"type": "string"
},
"provider": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
},
"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≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x2b6D…C32C5. The signed payment is good for 1 minute.
- Paid to
- 0x2b6D…C32C5
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 1000 smallest units
1000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- TW6nta…cyWhn
- Token contract
- EPjFWd…TDt1v
- Payment window
- 1 minute
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"name": "USDC",
"version": "1",
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 1,
"cursor": "example",
"status": "unopened",
"tickers": "example",
"eventTicker": "example",
"seriesTicker": "example"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "integer",
"maximum": 100,
"minimum": 1
},
"cursor": {
"type": "string",
"maxLength": 400
},
"status": {
"enum": [
"unopened",
"open",
"closed",
"settled"
],
"type": "string"
},
"tickers": {
"type": "string",
"maxLength": 400,
"description": "Comma-separated tickers."
},
"eventTicker": {
"type": "string",
"maxLength": 120
},
"seriesTicker": {
"type": "string",
"maxLength": 120
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-01 04:13Z
- Last indexed by Roundhouse
- 2026-07-30 11:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 21:15Z
- x402 version
- 2
- Max timeout
- 60s
- 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service 2s 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=2s' 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://2s.io/api/predict/kalshi-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.