saylorinnovations.com
Trending Prediction Markets (Polymarket + Kalshi). Trending Polymarket and Kalshi prediction markets right now: most-traded events with outcomes, current odds as implied probabilities, 24h volume and liquidity.
TradingLiveeip155:8453Exactvia facilitator:payAI
Prediction-marketsPolymarketKalshiTrending
Calls · 30d
5↑ 21%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$15.76
Verified settled volume
1,657 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aaThe 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 to access this resource.",
"accepts": [
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"memo": "saylor:predictions:trending:tren",
"session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczp0cmVuZGluZzp0cmVuZGluZyIsInJlZmVyZW5jZSI6IkY5M3JxZkhOSHY1dHh6ejRzSmN3RXVuOFdVOWFKd3FQRkJTS0tyd005SEMzIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjIwMDAsImV4cCI6MTc5MDc1MDg1NjAzM30.AL52h4CxfzqUedj3_K-mWCd3n07dQv4Agxpcc4vDPyM",
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww",
"reference": "F93rqfHNHv5txzz4sJcwEun8WU9aJwqPFBSKKrwM9HC3"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"memo": "saylor:predictions:trending:tren",
"session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczp0cmVuZGluZzp0cmVuZGluZyIsInJlZmVyZW5jZSI6IjVkRFVpNTVnazJUeGZXazl3NkwzUWhHZWNyUno0blR5WHBqOEdTeE56aXB3IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjIwMDAsImV4cCI6MTc5MDc1MDg1NjAzM30.viP9j8C7lnWymCHpp8b05l9r3tIkHLHQa1UGAg8TncY",
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww",
"reference": "5dDUi55gk2TxfWk9w6L3QhGecrRz4nTyXpj8GSxNzipw"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "2000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
},
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:predictions:trending:tren",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"memo": "saylor:predictions:trending:tren",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "2000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 120
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"memo": "saylor:predictions:trending:tren",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "2000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 120
},
{
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:predictions:trending:tren",
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"native": true,
"session": "eyJhcnRpY2xlSWQiOiJwcmVkaWN0aW9uczp0cmVuZGluZzp0cmVuZGluZyIsInJlZmVyZW5jZSI6IkIzbXRyMXNOb3JKNUZ2ejl2ZXdwd1RpU0RyS2h5eHZlRXl0R0pKTEJBQUZ6IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjE2Mzk1LCJleHAiOjE3OTA3NTA4NTYwMzR9.6ap_IJqTVH_L2XnXHwXporanjZqwkNMn_bKh2XZFK44",
"reference": "B3mtr1sNorJ5Fvz9vewpwTiSDrKhyxveEytGJJLBAAFz",
"solUsdPrice": 118.32,
"quotedLamports": "16903"
},
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"amount": "16395",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://saylorinnovations.com/api/predictions/trending",
"tags": [
"prediction-markets",
"polymarket",
"kalshi",
"trending"
],
"iconUrl": "https://saylorinnovations.com/og-image.jpg",
"mimeType": "application/json",
"description": "Trending Prediction Markets (Polymarket + Kalshi). Trending Polymarket and Kalshi prediction markets right now: most-traded events with outcomes, current odds as implied probabilities, 24h volume and liquidity.",
"serviceName": "Saylor Innovations Prediction Markets"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"count": 1,
"events": [
{
"id": "what-price-will-bitcoin-hit-in-september-2026",
"url": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
"title": "What price will Bitcoin hit in September?",
"markets": [
{
"best_ask": 0.08,
"best_bid": 0.06,
"outcomes": [
{
"name": "Yes",
"probability": 0.07
},
{
"name": "No",
"probability": 0.93
}
],
"question": "Will Bitcoin reach $100,000 in September?",
"liquidity_usd": 45000,
"volume_24h_usd": 120000
}
],
"category": null,
"platform": "polymarket",
"closes_at": "2026-09-30T23:59:00Z",
"volume_24h_usd": 891236
}
],
"generated_at": "2026-09-24T19:30:00.000Z"
}
}
},
"schema": {
"type": "object",
"$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",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"generated_at",
"events"
],
"properties": {
"count": {
"type": [
"number",
"null"
]
},
"events": {
"type": "array",
"items": {
"type": "object"
}
},
"generated_at": {
"type": "string"
}
}
}
}
}
}
}
},
"method": "GET",
"example": {
"count": 1,
"events": [
{
"id": "what-price-will-bitcoin-hit-in-september-2026",
"url": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
"title": "What price will Bitcoin hit in September?",
"markets": [
{
"best_ask": 0.08,
"best_bid": 0.06,
"outcomes": [
{
"name": "Yes",
"probability": 0.07
},
{
"name": "No",
"probability": 0.93
}
],
"question": "Will Bitcoin reach $100,000 in September?",
"liquidity_usd": 45000,
"volume_24h_usd": 120000
}
],
"category": null,
"platform": "polymarket",
"closes_at": "2026-09-30T23:59:00Z",
"volume_24h_usd": 891236
}
],
"generated_at": "2026-09-24T19:30:00.000Z"
},
"license": "LicenseRef-Saylor-Agent-Use-1.0",
"mimeType": "application/json",
"freshness": "live (Kalshi event list cached up to 10 minutes)",
"freeSample": "https://saylorinnovations.com/api/predictions/sample/trending",
"tokenCount": null,
"inputSchema": {
"limit": "optional 1-25 events, default 10 (query)",
"platform": "optional polymarket | kalshi (query)"
},
"serviceName": "Saylor Innovations Prediction Markets",
"instructions": "STANDARD PATH (works with stock x402 clients): send payload.transaction — a base64 partially-signed Solana transaction — and we route verify/settle through an x402 facilitator that sponsors the fee and submits it. Include the chosen accepts entry as \"accepted\" so we can match terms. ALTERNATIVE PATH (no facilitator): Pick ONE entry from accepts and use the reference and session from THAT entry — each asset has its own. USDC or USDT: send an SPL transfer of the exact amount. Native SOL (asset=So11111111111111111111111111111111111111112, extra.native=true): send that many lamports with a system transfer. Either way include extra.reference as a read-only account (Solana Pay style), then retry with PAYMENT-SIGNATURE: base64({x402Version:2, payload:{session, reference}}). If your client cannot attach a reference, send payload.signature instead (USDC only). SOL amounts are quoted live and expire in 120s; stablecoins do not move. The facilitator path verifies and settles in this request. Only the alternative self-submitted Solana path needs retries while the transfer is indexed (typically 3-4 attempts over 10-20s). On that path, a 402 saying \"payment not found on-chain yet\" means keep retrying.",
"outputSchema": {
"type": "object",
"required": [
"generated_at",
"events"
],
"properties": {
"count": {
"type": [
"number",
"null"
]
},
"events": {
"type": "array",
"items": {
"type": "object"
}
},
"generated_at": {
"type": "string"
}
}
},
"settlementModes": [
"facilitator-transaction",
"self-submitted-reference"
],
"typicalLatencyMs": 1200
},
"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.
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0xA2A8…fc8aa. The signed payment is good for 2 minutes.
- Paid to
- 0xA2A8…fc8aa
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"memo": "saylor:predictions:trending:tren",
"name": "USD Coin",
"version": "2",
"facilitatorOnly": true,
"assetTransferMethod": "eip3009"
},
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"count": 1,
"events": [
{
"id": "what-price-will-bitcoin-hit-in-september-2026",
"url": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
"title": "What price will Bitcoin hit in September?",
"markets": [
{
"best_ask": 0.08,
"best_bid": 0.06,
"outcomes": [
{
"name": "Yes",
"probability": 0.07
},
{
"name": "No",
"probability": 0.93
}
],
"question": "Will Bitcoin reach $100,000 in September?",
"liquidity_usd": 45000,
"volume_24h_usd": 120000
}
],
"category": null,
"platform": "polymarket",
"closes_at": "2026-09-30T23:59:00Z",
"volume_24h_usd": 891236
}
],
"generated_at": "2026-09-24T19:30:00.000Z"
}
}
},
"schema": {
"type": "object",
"$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",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object",
"required": [
"generated_at",
"events"
],
"properties": {
"count": {
"type": [
"number",
"null"
]
},
"events": {
"type": "array",
"items": {
"type": "object"
}
},
"generated_at": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-28 07:03Z
- Last indexed by Roundhouse
- 2026-09-29 02:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-30 06:45Z
- x402 version
- 2
- Max timeout
- 120s
- 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. 32 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 saylorinnovations.com 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=saylorinnovations.com' 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://saylorinnovations.com/api/predictions/trending, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.