{ "x402Version": 2, "id": 30151, "slug": "30151", "resource": "https://alphapipeline-eu.onrender.com/v1/prediction/hip4-alerts/subscribe", "description": "[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.", "type": "http", "serviceName": "AlphaPipeline HIP-4 Alerts", "resourceType": "MCP Tool", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x2bcfA4F7E1fA5E96934846A7dEa623398Ed7f752", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "20000", "amountUsd": 0.02, "maxTimeoutSeconds": 300 } ], "outputSchema": { "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" }, "extensions": { "bazaar": { "info": { "input": { "method": "GET", "queryParams": { "event_types": [ "hip4.prob_jump" ], "secret": "replace-with-your-own-32-byte-random-secret", "underlying": "BTC", "webhook_url": "https://example.com/webhooks/alphapipeline" }, "type": "http" }, "output": { "example": { "created_at": 1790700000, "event_types": [ "hip4.prob_jump", "hip4.market_created" ], "expires_at": 1790786400, "notice": "EXPERIMENTAL - based on a draft MCP Events spec that has not stabilized. This is 5-minute-interval polling, not a true push feed. Subscriptions are not guaranteed to survive a server restart. Renew by subscribing again before expires_at.", "status": "active", "subscription_id": "sub_3f9a7c2e1b4d5f6a7b8c", "threshold_pct": null, "underlying": "BTC", "webhook_url": "https://example.com/webhooks/alphapipeline" }, "type": "json" } }, "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" } } }, "tags": [ "prediction-market", "hyperliquid", "hip4", "webhook", "pre-trade-signal", "bazaar" ], "sourceHost": "alphapipeline-eu.onrender.com", "lastUpdated": "2026-09-30T16:45:48.776Z", "quality": { "calls30d": 1, "uniquePayers30d": 1, "lastCalledAt": "2026-09-30T16:45:48.335Z" }, "metadata": { "serviceName": "AlphaPipeline HIP-4 Alerts", "extensions": { "bazaar": { "info": { "input": { "method": "GET", "queryParams": { "event_types": [ "hip4.prob_jump" ], "secret": "replace-with-your-own-32-byte-random-secret", "underlying": "BTC", "webhook_url": "https://example.com/webhooks/alphapipeline" }, "type": "http" }, "output": { "example": { "created_at": 1790700000, "event_types": [ "hip4.prob_jump", "hip4.market_created" ], "expires_at": 1790786400, "notice": "EXPERIMENTAL - based on a draft MCP Events spec that has not stabilized. This is 5-minute-interval polling, not a true push feed. Subscriptions are not guaranteed to survive a server restart. Renew by subscribing again before expires_at.", "status": "active", "subscription_id": "sub_3f9a7c2e1b4d5f6a7b8c", "threshold_pct": null, "underlying": "BTC", "webhook_url": "https://example.com/webhooks/alphapipeline" }, "type": "json" } }, "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" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "alphapipeline-eu.onrender.com", "manifest_name": "alphapipeline-eu.onrender.com", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-14T01:15:01.050Z" }, "exampleResponse": { "example": { "created_at": 0, "event_types": [ "string" ], "expires_at": 0, "notice": "string", "status": "string", "subscription_id": "string", "threshold_pct": null, "underlying": null, "webhook_url": "string" }, "type": "string" } }