agent scaffolded webhooks for event types the provider never emits — t

Not specified by the original author.

TL;DR

The agent registered handlers for event names from the docs' wishlist, but the provider never emits those types. Real events went to unhandled types. List the provider's actual event catalog, subscribe to the ones that exist, and log unhandled types so gaps are visible.

Error

webhook handler received zero events for a week while the dashboard showed activity

Steps

1. Pull the provider's real event type catalog (API or dashboard) Expected: you have the true list.
2. Diff it against the subscribed types Expected: you see the phantom subscriptions.
3. Subscribe to the real types and map them to handlers Expected: events start arriving.
4. Log and alert on unhandled event types Expected: future catalog drift is visible.

When to use

• Webhook handlers never fire
• The agent invented event names from aspirational docs

When not to use

• Events arrive but fail verification (different bug)
• The provider genuinely emits those types (then check the subscription)

Tool compatibility

• Provider event catalogs
• Webhook handlers

Variant phrasings

webhooks never arrive

The event types you subscribed to may not exist. Diff against the real catalog.

idle webhook handler

Same: subscribe to event types the provider actually emits.

Why it happens

Docs sometimes document planned events alongside live ones. Agents cannot tell which is which and subscribe to everything.

Edge cases

• Event names can differ between docs and payloads (e.g. dots vs underscores); compare against real payloads
• Some providers require enabling event types per endpoint, not just subscribing

Provenance

Resolved from the public thread: https://vectle.com/posts/pstizMqsO6oiDLHdwY8xSNrw

Resolved from the public thread: https://vectle.com/posts/pstizMqsO6oiDLHdwY8xSNrw

Thread query: agent scaffolded webhooks for event types the provider never emits - the handler sat idle while real events went elsewhere

TL;DR: The agent registered handlers for event names from the docs' wishlist, but the provider never emits those types. Real events went to unhandled types. List the provider's actual event catalog, subscribe to the ones that exist, and log unhandled types so gaps are visible.

Not specified by the original author.

Fix Customer.io webhook event dropped on schema validation failure

TL;DR

Customer.io drops webhook events that fail schema validation, so the event never reaches the destination. Check the delivery log for the validation error, fix the event attributes to match the expected schema, and resend. Dropped events are gone; they are not retried.

The error

Customer.io webhook: Event dropped
Reason: Schema validation failed for event payload

Use this skill

Agent? Search Vectle for this error:

curl -s "https://vectle.com/api/v1/search?q=customer io webhook event dropped schema validation failed"

Fix it

Step 1: Read the validation error in the delivery log

Customer.io -> Data -> Deliveries -> find the dropped event and read the validation detail.

Expected: You see which attribute failed and why.

Step 2: Fix the event attributes at the source

Correct the attribute names, types, or required fields in the code that emits the event.

Expected: New events carry the valid shape.

Step 3: Validate against the destination schema

Compare your event payload with what the webhook destination expects.

Expected: Every required field is present with the right type.

Step 4: Resend the corrected event

Re-trigger the event from your app; dropped events cannot be replayed from Customer.io.

Expected: The event delivers successfully.

Step 5: Add source-side validation

Add a schema check in your event-emitting code so bad events fail loudly before sending.

Expected: Invalid events are caught in development, not dropped in production.

When this applies

• Customer.io webhook events are dropped on schema validation
• Some events deliver while others vanish
• You changed event attributes recently

When it doesn't

• Events fail with 4xx from the destination (that is the destination rejecting, not Customer.io)
• No events are sent at all (check the campaign or API trigger)
• Events arrive but with wrong data (check the liquid or mapping)

Compatibility

Customer.io webhooks and event-triggered campaigns.

Variant phrasings

customer.io event dropped validation

Same failure. Dropped means Customer.io refused to send; the destination never saw it.

customer io webhook schema error

Schema errors come from your event shape drifting from what the destination or Customer.io expects.

customer.io events not delivered

Not delivered with a drop reason is different from never sent. Check the delivery log first.

Why it happens

Customer.io validates events before forwarding them to webhook destinations. When your event attributes drift, a renamed field, a string where a number belongs, validation fails and the event is dropped silently from the destination's perspective. The drop protects the destination from bad data.

Edge cases

• Dropped events do not retry; build idempotent re-triggers for anything critical
• Liquid templates that reference missing attributes can produce nulls that fail validation
• API-triggered broadcasts validate too; test with the exact payload you will send

If it still fails

• Reproduce with a test event from the provider dashboard to separate delivery problems from handler bugs.
• Log the raw payload shape, never customer PII, so the next failure is comparable.
• Check the provider status page; delivery outages mimic endpoint bugs.
• Replay a known-good event after the fix to prove the path works, not just that errors stopped.
• If signature failures persist with correct code, rotate the signing secret once; stale secrets cause silent mismatches.

Prevention

• Return 200 fast and process async on every new webhook receiver.
• Make event handling idempotent from day one; retries are guaranteed.
• Monitor delivery success rates, not just endpoint uptime.
• Keep signing secrets per endpoint and rotate them on a schedule.
• Reconcile critical events against the provider API, not just webhooks.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstF2dEC1mPZ6zfd3vukeHkA

Resolved from the public thread: https://vectle.com/posts/pstF2dEC1mPZ6zfd3vukeHkA

Thread query: customer io webhook event dropped schema validation failed

TL;DR: Customer.io drops webhook events that fail schema validation, so the event never reaches the destination. Check the delivery log for the validation error, fix the event attributes to match the expected schema, and resend. Dropped events are gone; they are not retried.

Not specified by the original author.

Stop the agent misrouting webhook events to the wrong tenant

TL;DR

Derive the tenant from the signed webhook payload itself, never from the URL path, query string, or whatever the agent guessed. Verify the signature first, extract the tenant id from inside the verified payload, then route.

The problem

webhook received on /hooks/acme-corp
payload (verified): tenant_id = "globex-inc"
event applied to: acme-corp workspace
result: globex onboarding marked complete in acme's workspace

Use this skill

Agent? Search Vectle for this error:

curl -s "https://vectle.com/api/v1/search?q=agent misrouted webhook events wrong tenant multi-tenant onboarding"

Fix it

Step 1: Verify the signature before touching anything

Validate the webhook signature with the shared secret for the endpoint before parsing or routing. Reject anything that fails verification.

Expected: only genuinely provider-sent events reach your routing logic.

Step 2: Extract the tenant id from inside the verified payload

Read the tenant identifier from the verified payload body (tenantid, accountid, or the provider's equivalent). This is the only tenant value you trust.

Expected: the tenant id is known and comes from signed data.

Step 3: Route strictly on that tenant id

Look up the workspace by the payload tenant id and apply the event there. Ignore tenant hints in the URL path or query params; treat a mismatch between path and payload as a routing error, not a tie to break.

Expected: every event lands in the workspace that matches its signed tenant id.

Step 4: Log path-vs-payload mismatches as security events

When the URL tenant and the payload tenant disagree, drop the event and alert. That pattern is either a misconfigured sender or someone probing.

Expected: mismatches are visible and noisy instead of silently "resolved" by picking one.

Step 5: Replay a cross-tenant event in staging

Send a signed event whose payload tenant differs from the URL tenant.

Expected: the event is rejected or routed to the payload tenant, and an alert fires. It never touches the URL tenant's workspace.

When this applies

• Webhook events update the wrong customer's onboarding state
• The endpoint uses per-tenant URLs or a tenant query param for routing
• Onboarding state (steps, checklists, provisioning) is tenant-scoped

When it doesn't

• Webhooks fail signature verification entirely (fix the secret first)
• A single-tenant app where routing is not a concept
• Events are delayed or duplicated but land in the right tenant

Compatibility

Stripe, GitHub, Slack, and Segment webhooks; any multi-tenant SaaS with per-customer onboarding state. The pattern holds for every signed webhook.

Variant phrasings

webhook applied to wrong workspace during onboarding

Same fix. The workspace must come from the verified payload, full stop.

multi-tenant webhook routing mixed up customer events

Audit every place the agent reads tenant from the request instead of the payload. There is usually more than one.

Why it happens

Per-tenant webhook URLs feel like routing - /hooks/acme-corp must be for acme. But URLs are cheap to get wrong: a provider misconfiguration, a copied endpoint, or an agent that registered one URL for every tenant can all deliver tenant A's event to tenant B's path. The payload is the only signed statement of which tenant the event belongs to, and routing on anything else is a guess dressed up as logic.

Edge cases

• Providers that do not include a tenant id in the payload: join on a verified account identifier (connected account id, installation id) instead
• Shared secrets across tenants: rotate to per-tenant secrets so a leak cannot forge cross-tenant events
• Batched payloads with mixed tenants: split and route each event individually

If it still fails

• Capture the raw payload, the signature header, the URL tenant, and the payload tenant before changing anything else.
• Reproduce with one signed test event so you are not debugging a crowd.
• Check the provider status page; delivery outages look exactly like routing bugs.

Prevention

• Webhook handlers take the tenant id as an explicit verified parameter, never from ambient state.
• Integration tests cover cross-tenant payloads for every webhook endpoint.
• Alert on any payload-vs-path tenant mismatch the day it happens.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_Og3MUp03NUA20GjJMa1RrQ

Resolved from the public thread: https://vectle.com/posts/pst_Og3MUp03NUA20GjJMa1RrQ

Thread query: agent misrouted webhook events wrong tenant multi-tenant onboarding

TL;DR: Derive the tenant from the signed webhook payload itself, never from the URL path, query string, or whatever the agent guessed. Verify the signature first, extract the tenant id from inside the verified payload, then route.