Introduction
Webhook Relay is a service that receives incoming webhooks and forwards them to the right destination, so you can work with webhook data without exposing internal systems to the public internet. In simple terms, a webhook relay is a middle layer that accepts an event from one service and delivers it to another place you choose.
That matters because direct webhook delivery often breaks down when your app sits behind a NAT, a firewall, or a private network, or when you need to test against localhost without opening up your machine. Webhook handling can also become brittle when endpoints change, retries fail, or teams need visibility into what was sent and what actually arrived.
Developers use a webhook relay service to connect SaaS integrations, API workflows, and event-driven architecture without exposing internal systems. It is especially useful for local development, staging environments, and production environments where you need reliable delivery, observability, and control over where events go.
If you want a broader primer first, start with what a webhook is. If you want a product overview, see ReqPour and webhook relay for developers. For a broader learning hub, visit ReqPour Learn.
What is Webhook Relay?
Webhook Relay receives a webhook from services like GitHub, Stripe, Shopify, or Slack, can inspect or transform the payload, then forwards it to the destination you control. It is a routing layer for webhooks, not just a pass-through.
A webhook relay differs from webhook forwarding, a webhook proxy, and secure tunnels. Forwarding usually means sending a request to another URL. A proxy may relay traffic without adding much delivery logic. A tunnel mainly creates connectivity to localhost or a private endpoint. A webhook relay adds delivery control, filtering, retries, and visibility, which helps teams bridge cloud services to internal systems without opening inbound ports through a firewall or NAT.
Teams use it for local development, private services behind firewalls, and multi-environment delivery. Tools like ReqPour and webhook relay for developers make it easier to test safely and route the same event to different environments.
How Webhook Relay works
A source system like GitHub or Stripe sends an event to a stable inbound endpoint on the webhook relay. The relay receives the request, logs the payload, and assigns delivery status so you can trace what happened from source to destination.
From there, the pipeline is simple: receive, route, transform, deliver. Event routing rules decide where each webhook goes, whether that is a REST API, a microservice, or a local service on localhost for local webhook relay testing. Payload transformation can reshape fields for different downstream systems, such as converting a GitHub push event into a format your Express app expects; see handling webhooks in Express.
Webhook Relay can fan out one event to multiple destinations, which helps when you need the same webhook in a development environment, a staging environment, and a production environment. It also supports private endpoints, so internal services do not need public exposure.
Reliability comes from retry logic, failed delivery handling, logging, and monitoring. If a destination fails, the relay can retry and keep observability high through delivery logs and status visibility. For event streams that need a different transport, WebSocket relay works alongside webhook forwarding.
Key features and use cases
Webhook Relay combines webhook forwarding, secure tunnels, private endpoints, retry logic, logging, and monitoring in one routing layer. That makes it useful when you need reliable delivery to public APIs, internal services, or locked-down production environments.
Local webhook relay testing is easier because you can send Stripe, GitHub, or Shopify events to localhost or a staging environment without exposing your machine. For SaaS integrations and API workflows, event routing and fan-out let one webhook trigger multiple downstream actions, such as updating a CRM, syncing an ERP, and notifying a Slack channel.
Teams also use webhook relay for developers to connect cloud events to internal systems, including on-prem services behind firewalls. In event-driven architecture and microservices, that separation keeps services decoupled while webhook forwarding handles delivery, retries, and observability.
How to secure webhook endpoints
Exposed webhook endpoints are easy targets because they accept inbound requests from outside your network, often with business-critical actions attached. If an attacker can send a fake event, repeat an old one, or alter the payload before it reaches your app, they can trigger fraud, data corruption, or unauthorized state changes.
A spoofed request looks like it came from Stripe, GitHub, or another trusted sender but did not. A replay attack resends a valid webhook later to repeat the same action. Payload tampering changes the body in transit or before processing. Secret leakage exposes the signing secret, which lets an attacker forge requests.
Start with HTTPS, but treat it as transport protection only; you still need HMAC signature verification, timestamps, nonces, and idempotency to trust the event. Add IP allowlists where providers publish stable ranges, rotate secrets regularly, keep payloads minimal, and watch logging, audit logs, and monitoring for anomalies. For implementation patterns, see handling webhooks in Express and ReqPour Learn.
How Webhook Relay helps with security and reliability
A webhook relay reduces attack surface by keeping internal systems private while still receiving events from GitHub, Stripe, Shopify, or Slack. With secure tunnels and private endpoints, you do not need to expose production APIs directly to the internet, and you can keep staging environments isolated from production environments.
Centralized forwarding also improves control across SaaS integrations and internal systems. Webhook Relay’s audit logs, logging, and monitoring give you observability for each delivery, which helps with debugging, compliance reviews, and incident response. Retry logic and delivery history make missed events easier to catch and replay, which is why the product fits production workloads, not just local testing. For a deeper setup guide, see webhook relay for developers or explore ReqPour.
Pricing, comparison, and getting started
When you evaluate pricing for a webhook relay, compare it against the work it removes. Focus on webhook volume, how many development environments and production environments you need, whether your team needs multiple private endpoints, and how much logging and monitoring you want for troubleshooting and auditability. If your workflow depends on reliable delivery, retries, and routing control, the right plan is usually the one that fits your throughput and team size without forcing you to bolt on extra infrastructure.
That is where Webhook Relay often fits better than ngrok. ngrok is excellent for exposing local services through secure tunnels, especially for quick demos and local testing. Webhook Relay is a stronger choice when your main goal is webhook forwarding, routing, delivery control, and persistent handling across local development, staging, and production workflows. If you need stable source endpoints, private destinations, and visibility into every delivery attempt, a webhook relay is the more direct fit.
A simple onboarding path looks like this:
- Create an account.
- Configure a source endpoint.
- Choose the destination you want webhooks forwarded to.
- Send a test event.
- Review delivery logs and adjust routing if needed.
If you want a deeper implementation view, see webhook relay for developers, local webhook relay testing, ReqPour Learn, and handling webhooks in Express. To start using the product, explore ReqPour.