Encore Go Webhook

Encore Go Webhook Endpoints

Instructions

Use //encore:api raw to receive inbound webhooks from third-party services. Raw endpoints give you direct access to http.ResponseWriter and *http.Request, which you need for signature verification (the verification typically requires the unparsed raw body).

1. Define the endpoint with //encore:api raw

package webhooks

import (
    "io"
    "net/http"
)

//encore:api public raw path=/webhooks/stripe method=POST
func StripeWebhook(w http.ResponseWriter, req *http.Request) {
    sig := req.Header.Get("Stripe-Signature")

    // Read the raw body — needed for signature verification.
    body, err := io.ReadAll(req.Body)
    if err != nil {
        http.Error(w, "could not read body", http.StatusBadRequest)
        return
    }

    // Verify signature, parse event, handle, then respond...

    w.Header().Set("Content-Type", "application/json")
    w.WriteHeader(http.StatusOK)
    w.Write([]byte(`{"received":true}`))
}

2. Verify the signature

Most providers sign webhooks. Read the secret with secrets (see the encore-go-secret skill) and verify before trusting the payload.

package webhooks

import (
    "github.com/stripe/stripe-go/v76/webhook"
)

var secrets struct {
    StripeWebhookSecret string
}

//encore:api public raw path=/webhooks/stripe method=POST
func StripeWebhook(w http.ResponseWriter, req *http.Request) {
    body, _ := io.ReadAll(req.Body)
    sig := req.Header.Get("Stripe-Signature")

    event, err := webhook.ConstructEvent(body, sig, secrets.StripeWebhookSecret)
    if err != nil {
        http.Error(w, "signature verification failed", http.StatusBadRequest)
        return
    }

    // event is now trusted — handle it.
    _ = event
    w.WriteHeader(http.StatusOK)
}

For GitHub, verify the HMAC-SHA256 in the X-Hub-Signature-256 header against the raw body using your webhook secret.

Common providers

| Provider | Signature header | Verification | |---|---|---| | Stripe | Stripe-Signature | stripe.webhook.ConstructEvent(rawBody, sig, secret) | | GitHub | X-Hub-Signature-256 | HMAC-SHA256 over the raw body | | Slack | X-Slack-Signature | HMAC-SHA256 over v0:{timestamp}:{rawBody} | | Shopify | X-Shopify-Hmac-Sha256 | HMAC-SHA256 (base64) over the raw body | | Twilio | X-Twilio-Signature | HMAC-SHA1 over URL + sorted form fields |

Always respond quickly

Webhook senders retry on non-2xx or slow responses. Acknowledge with a 2xx as soon as the payload is verified, then enqueue the actual work via Pub/Sub (see encore-go-pubsub) instead of doing it in the request handler.

package webhooks

import (
    "encore.dev/pubsub"
    "net/http"
)

type StripeEvent struct {
    ID   string `json:"id"`
    Type string `json:"type"`
    Data any    `json:"data"`
}

var StripeEvents = pubsub.NewTopic[*StripeEvent]("stripe-events", pubsub.TopicConfig{
    DeliveryGuarantee: pubsub.AtLeastOnce,
})

//encore:api public raw path=/webhooks/stripe method=POST
func StripeWebhook(w http.ResponseWriter, req *http.Request) {
    // ... verify signature, parse event ...

    _, _ = StripeEvents.Publish(req.Context(), &StripeEvent{
        ID: event.ID, Type: string(event.Type), Data: event.Data,
    })
    w.WriteHeader(http.StatusOK)
}

Guidelines

• Use //encore:api raw only for webhooks and other low-level HTTP integrations.
• Always verify the provider's signature before trusting the payload.
• Always respond 2xx fast — push slow work onto Pub/Sub.
• Store the signing secret in secrets struct{...}; never inline it.
• For typed JSON endpoints in your own service, use plain //encore:api from the encore-go-api skill.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: encoredev
• Source: encoredev/skills
• License: Apache-2.0
• Homepage: https://encore.dev

Install and usage instructions live in the source repository linked above.