Notification and communication webhooks — hookstream

About hookstream

hookstream is the modern event gateway for developers who need webhooks that just work. It receives, transforms, and delivers webhooks reliably with real-time monitoring, automatic retries, circuit breakers, and instant database sync.

Key features

• Webhook ingestion with HMAC signature verification for 15+ providers (Stripe, GitHub, Shopify, etc.)
• Content-based routing and filtering with 9 operators
• JSONata transforms for payload reshaping
• Reliable delivery with exponential/linear/fixed retries and circuit breakers
• 8 destination types: HTTP, AWS SQS, S3, EventBridge, GCP Pub/Sub, Kafka, RabbitMQ, WebSocket
• Real-time event streaming via WebSocket
• Instant Database — sync webhooks to queryable collections
• Topics and pub/sub fan-out
• Event replay and archival
• Free webhook testing with no signup required

API

Base URL: https://hookstream.io/v1

Authentication: API key via X-API-Key header (hs_live_* or hs_test_*) or session cookie.

Full API reference: Authentication | Sources | Destinations | Connections | Events | Metrics

AI Agent Integration

hookstream is designed for AI agent use with three auth levels:

• Zero-auth (Agent API): POST https://hookstream.io/v1/agent/sessions — creates ephemeral webhook endpoints, no credentials needed. Sessions last 14 days, 2,000 requests.
• API Key: Full CRUD access via X-API-Key header. Get a key from the dashboard or run: npm install -g @hookstream/cli && hookstream login (opens browser, saves key to ~/.config/hookstream/config.json)
• Environment variable: Set HOOKSTREAM_API_KEY for agent scripts. All CLI commands support --json flag for machine-readable output.

Agent API Endpoints (no auth)

• POST https://hookstream.io/v1/agent/sessions — Create ephemeral webhook endpoint
• GET https://hookstream.io/v1/agent/sessions/:id — Get session + events
• PATCH https://hookstream.io/v1/agent/sessions/:id/response — Configure custom response
• PATCH https://hookstream.io/v1/agent/sessions/:id/forwarding — Forward webhooks to local server
• GET https://hookstream.io/v1/agent/sessions/:id/export — Export as NDJSON/CSV

Plans

• Free: $0/mo — 50K events, 10 sources, 5 destinations, 7-day retention
• Pro: $19/mo — 1M events, unlimited sources/destinations, 30-day retention
• Enterprise: $99/mo — 10M events, unlimited, 90-day retention

Documentation (as markdown)

Getting started

• Quickstart
• How it works
• Key concepts
• Your first webhook

API reference

• Authentication
• Sources API
• Destinations API
• Connections API
• Events API
• Delivery Attempts API
• Metrics API
• Issues API
• Collections API
• Topics API
• Test Sessions API
• Billing API

Guides

• Signature verification
• Retry strategies
• Circuit breaker
• Webhook testing
• Monitoring and alerts

Destination providers

• HTTP
• AWS SQS
• AWS S3
• AWS EventBridge
• GCP Pub/Sub
• Kafka
• RabbitMQ
• WebSocket