AlphaPipeline HIP-4 Alerts
[EXPERIMENTAL] Subscribe a webhook to receive push notifications when a HIP-4 outcome's probability jumps past a configurable threshold, or a new market appears - so an agent no longer has to poll hip4-snapshot itself. Polls Hyperliquid every ~5 minutes; not a true real-time feed. GET with query params, not JSON body - secret travels in the URL. See free GET /v1/prediction/hip4-alerts/event-types for the event catalog. Paid in USDC on Base.
Offering
- Provider
- alphapipeline-eu.onrender.com
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Prediction Markets
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://alphapipeline-eu.onrender.com/v1/prediction/hip4-alerts/subscribe- MIME type
- application/json
- First seen
- 2026-10-16T01:50:38.788Z
- Last seen
- Tags
- prediction-market, hyperliquid, hip4, webhook, pre-trade-signal
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "20000",
"payTo": "0x2bcfA4F7E1fA5E96934846A7dEa623398Ed7f752"
}
]Observed health
- Status
- Healthy
- Latest latency
- 308 ms
- Average latency
- 1090 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 8 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET",
"HEAD",
"DELETE"
]
},
"queryParams": {
"type": "object",
"properties": {
"webhook_url": {
"type": "string",
"format": "uri",
"description": "https:// endpoint to receive signed POST deliveries. Private/loopback IPs are rejected."
},
"secret": {
"type": "string",
"description": "Caller-generated shared secret (>=16 chars) used to HMAC-SHA256 sign each delivery. Not stored anywhere you can retrieve it later - keep your own copy. Travels in the URL query string (GET) - see the endpoint description."
},
"event_types": {
"type": "array",
"items": {
"type": "string"
},
"description": "Subset of event types to receive (default: all). See GET hip4-alerts/event-types."
},
"underlying": {
"type": "string",
"description": "Optional filter: only this crypto underlying's markets (e.g. 'BTC')."
},
"threshold_pct": {
"type": "number",
"description": "Optional per-subscription override of the prob_jump threshold (0.0-1.0 scale)."
}
},
"required": [
"webhook_url",
"secret"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"properties": {
"event_types": {
"description": "Subset of event types to receive (default: all). See GET hip4-alerts/event-types.",
"items": {
"type": "string"
},
"type": "array"
},
"secret": {
"description": "Caller-generated shared secret (>=16 chars) used to HMAC-SHA256 sign each delivery. Not stored anywhere you can retrieve it later - keep your own copy. Travels in the URL query string (GET) - see the endpoint description.",
"type": "string"
},
"threshold_pct": {
"description": "Optional per-subscription override of the prob_jump threshold (0.0-1.0 scale).",
"type": "number"
},
"underlying": {
"description": "Optional filter: only this crypto underlying's markets (e.g. 'BTC').",
"type": "string"
},
"webhook_url": {
"description": "https:// endpoint to receive signed POST deliveries. Private/loopback IPs are rejected.",
"format": "uri",
"type": "string"
}
},
"required": [
"webhook_url",
"secret"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"created_at": {
"title": "Created At",
"type": "number"
},
"event_types": {
"items": {
"type": "string"
},
"title": "Event Types",
"type": "array"
},
"expires_at": {
"title": "Expires At",
"type": "number"
},
"notice": {
"title": "Notice",
"type": "string"
},
"status": {
"title": "Status",
"type": "string"
},
"subscription_id": {
"title": "Subscription Id",
"type": "string"
},
"threshold_pct": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
],
"default": null,
"title": "Threshold Pct"
},
"underlying": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"title": "Underlying"
},
"webhook_url": {
"title": "Webhook Url",
"type": "string"
}
},
"required": [
"subscription_id",
"webhook_url",
"event_types",
"status",
"created_at",
"expires_at",
"notice"
],
"title": "Hip4AlertsSubscribeResponse",
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}