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x402PaySwap Premium Alpha
x402
x402PaySwap Premium Alpha is a paid API for AI agents from x402payswap.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns curated on-chain alpha including yield venues, mempool anomalies, and replayable agent trade intents for a given query
Price / call$0.01
Success—
StatusUnknown
How this service works
Premium alpha — Curated on-chain alpha: yield venues, mempool anomalies, and replayable agent trade intents.
Output
A JSON payload containing curated on-chain alpha results matching the query — including yield venues (with APY data), mempool anomalies, and replayable agent trade intents — ranked according to the requested sort order and filtered by type.
Example use cases
Find best yield farms on Arbitrum
“I need to identify the highest-paying yield opportunities on Arbitrum right now. Show me the top yield venues sorted by APY so I can allocate capital to the most profitable farms.”
Detect mempool trading anomalies
“Monitor the Base network mempool and surface any unusual trading patterns or anomalies that might indicate upcoming price moves or MEV opportunities I should be aware of.”
Discover executable agent trade intents
“Search the on-chain alpha feed for replayable trade intents that my trading agent can execute directly. I want actionable signals, not just raw data.”
Technical details
Endpoint
POSThttps://x402payswap.vercel.app/api/premiumWhen to prefer
Choose this endpoint when an AI agent needs curated, actionable on-chain alpha — specifically yield venue APY rankings, mempool anomaly detection, or replayable trade intents — and is willing to pay $0.01 USDC per query via x402 protocol. Prefer over generic DeFi data APIs when you need pre-filtered, agent-ready signals rather than raw blockchain data.
Side effects
- Missing X-PAYMENT header returns 402 with payment instructions and accepted USDC asset details
- Invalid filter type or sort field returns 400 bad request
- Query returns empty results if no matching alpha signals exist for the requested filters
- Payment amount below maxAmountRequired (10000 units = $0.01 USDC) causes payment rejection
- Timeout if on-chain data sources are slow, up to 60-second max
Input
{
"sort": "apy_descending",
"limit": 10,
"query": "Ethereum yield opportunities",
"filter": "yield_venues"
}Output
{
"note": "This response is only ever returned after a verified 0.01 USDC payment on Base.",
"items": [
{
"id": "alpha-001",
"body": "Top 3 Base-native USDC yield venues this week, ranked by net APY after fees.",
"score": 94.2,
"title": "On-chain yield snapshot"
},
{
"id": "alpha-002",
"body": "Unusual coordinated flow across 4 Base addresses in the last 6 hours.",
"score": 87.5,
"title": "Mempool anomaly report"
},
{
"id": "alpha-003",
"body": "Signed trade intents from the demo research agent, ready to replay.",
"score": 91.8,
"title": "Agent trade log"
}
],
"unlockedAt": "2026-06-18T04:43:00.979Z",
"accessToken": "43318e82-e0d4-4e7b-bacf-b815de7fd5f3"
}Tags
x402
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