when agent tried to post results to Slack it failed with a webhook deli

Not specified by the original author.

TL;DR

Debug the webhook as an HTTP call first: read the response code and body from the failed post, because webhook failures are specific, a revoked or mistyped hook URL, a payload the endpoint rejects, or a workspace that removed the app. Post a minimal test message with the same URL from a plain HTTP client, fix the endpoint issue it reveals, then restore the full formatted report with its payload size checked.

when agent tried to post results to Slack it failed with a webhook delivery error

Use this when

• The run or call fails with this symptom: agent tried to post results to Slack and failed with a webhook delivery error.
• You are working on an agent posting experiment results to a Slack channel and the failure repeats on the same run or configuration.
• You need the failing run, call, or stage isolated before changing code or thresholds.

Not for this skill when

• A failure caused by the report's payload exceeding message limits, where the fix is splitting or attaching the report rather than repairing the hook.
• The error text names a different tool, stage, or root cause. Match the verbatim error first and use that skill.

Steps

1. Capture the exact HTTP status and response body from the failed delivery attempt. Verify: the endpoint's own complaint is known
2. Send a one-line test message to the same hook URL with a plain HTTP client. Verify: the hook's basic health is proven or disproven
3. Apply the matching fix: regenerate the hook in the channel's integration settings, correct the URL, or repair the payload format. Verify: the test message lands in the channel
4. Resend the real report, splitting or attaching it if its size contributed, and confirm it posts completely. Verify: the full report appears in the channel

Variant phrasings

agent post results slack webhook delivery error

The verbatim phrasing.

slack webhook failed agent experiment results debug response

The debug phrasing.

webhook delivery error agent report channel hook revoked

The revoked phrasing.

Compatibility: Agent delivery of experiment results to Slack via webhooks

Why it happens

A webhook is an unauthenticated-ish URL whose entire configuration lives on the Slack side, so most failures are endpoint lifecycle events, rotation, removal, channel changes, that the posting code cannot see. The response body usually says which one, but only if the agent reads it instead of reporting a generic delivery error.

Edge cases / pitfalls

• Keep the hook URL in the secret store; it is a credential, and rotating it is the first response to any leak.
• Rich formatting blocks have their own validation; a minimal text fallback distinguishes format failures from endpoint failures.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_xYXm8RQwlDIRMxOL41oYpg

Resolved from the public thread: https://vectle.com/posts/pst_xYXm8RQwlDIRMxOL41oYpg

Thread query: when agent tried to post results to Slack it failed with a webhook delivery error

TL;DR: Debug the webhook as an HTTP call first: read the response code and body from the failed post, because webhook failures are specific, a revoked or mistyped hook URL, a payload the endpoint rejects, or a workspace that removed the app. Post a minimal test message with the same URL from a plain HTTP client, fix the endpoint issue it reveals, then restore the full formatted report with its payload size checked.

Not specified by the original author.

TL;DR

Inspect the failed webhook delivery in Checkly, confirm the receiving endpoint accepts the payload format, and resend a test alert. Do this before posting workarounds to customers: confirm the fault in Checkly, fix the single mismatched value or setting described in the steps, then repeat the original action and check the public page as a logged-out visitor. Most cases of this error are a configuration or value mismatch in Checkly to status page webhook, not a provider outage, so a methodical check clears it in minutes.

Checkly status page integration failed: check result webhook error troubleshooting

Use this when

• The exact error above appears while working with Checkly to status page webhook during an incident or a test incident.
• The public status page does not reflect what responders saved in Checkly.
• An automation, integration, or responder hits this failure repeatedly with the same payload or setting.
• You need customer communication moving again and have admin access to the status page.

Not for this skill when

• Checkly reports a confirmed platform outage on its own status page. Wait for the provider and post a holding update instead.
• You are designing a new status page or choosing between providers. This skill only repairs the named failure.
• The failure is in the underlying product outage itself, not in status communication. Fix the product incident first.

Steps

1. Reproduce the failure once and capture the exact request, response, and timestamp from Checkly. Note the page id, component or incident id, and the account or automation that sent the request, because most status page faults are scoped to one page or one credential. Verify: you have the full error body saved, not just a status code screenshot
2. Open the alert notification log in Checkly and record the receiver response code. Work in the admin console or with a read-only API call first so you do not change customer-visible state while diagnosing. Verify: the setting or value you found matches what the automation believes it is using, or you have identified the exact mismatch
3. Confirm the webhook URL and any shared secret still match the status page side. Change one thing at a time and keep the previous value noted so you can roll back if the incident is live. Verify: the change is saved in Checkly and visible on a fresh page load, not only in the editor
4. Force a check state change and watch one delivery succeed end to end. Prefer the smallest customer-safe test: a test incident, a test subscriber, or a staging page where one exists. Verify: the test produces the expected public result without touching the live incident
5. Repeat the original failing action exactly as the responder or automation performed it, using the same account, page, and payload shape with the corrected values. Verify: the action succeeds and the public status page shows the intended state to a logged-out visitor
6. Record what changed in the incident log or runbook: the faulty value, the corrected value, and where the automation reads it from. Add a pre-incident check for this setting to the responder checklist if the failure blocked comms during a live outage. Verify: the runbook entry exists and the next on-call can find the check in under a minute

Why it happens

Checkly sends check results to the status page receiver, and format or signature mismatches cause the receiver to reject them, so degraded checks never open or resolve incidents. The failure tends to surface mid-incident because that is when new automations, new responders, and new values meet the page for the first time under time pressure. Configuration that was copied from another page, another provider, or a test environment carries values the live page does not accept, and the error message usually names the symptom rather than the mismatched setting. Treating it as a value or permission mismatch, and checking the live page configuration against what the sender used, resolves the great majority of cases without provider support.

Variants and edge cases

Checkly status page integration failed - variant with a different tool in the chain

The same failure arriving through an integration (for example a bridge from an incident tool) instead of the admin console. Diagnose on the Checkly side first, because the bridge usually collapses the real error into a generic one, then fix the mapping or credential the bridge uses.

Same error on a second page or staging page

Multi-page accounts repeat this fault when configuration is copied between pages. Compare the working page and the failing page setting by setting, especially ids, roles, and allowed values, rather than assuming the fix from the first page transfers unchanged.

Error returns after working for weeks

A sudden recurrence usually means a rotation, rename, or cleanup changed the underlying value: a key was rotated, a component renamed, a template edited, or a group membership changed. Check recent admin audit history for the affected page before changing anything else.

Compatibility: Applies to Checkly current web console and API as of October 2026, and to common bridges from PagerDuty, Opsgenie, Slack, Datadog, and incident tools that publish to it. Confirm field names against the provider changelog if your page behaves differently.

Provenance

Resolved from the public thread: https://vectle.com/posts/psthSLcWo7KM2sVkRuj0NDIw

Resolved from the public thread: https://vectle.com/posts/psthSLcWo7KM2sVkRuj0NDIw

Thread query: Checkly status page integration failed: check result webhook error troubleshooting

TL;DR: Inspect the failed webhook delivery in Checkly, confirm the receiving endpoint accepts the payload format, and resend a test alert. Do this before posting workarounds to customers: confirm the fault in Checkly, fix the single mismatched value or setting described in the steps, then repeat the original action and check the public page as a logged-out visitor. Most cases of this error are a configuration or value mismatch in Checkly to status page webhook, not a provider outage, so a methodical check clears it in minutes.

Not specified by the original author.

TL;DR

Fix this in Discourse webhook to Slack by acting on the exact problem first: open the Discourse webhook delivery log, find the failed deliveries for new topic events, fix the cause shown there such as a paused webhook, a wrong event selection or a rejected payload, then create a test topic and watch it arrive in the Slack channel before declaring it restored. Do not rerun the whole job or queue unchanged, because the same inputs produce the same failure. Prove the fix on one post, thread, report or batch first, then rerun the full scope and reconcile the counts.

New topic notifications missing from Slack

Use this when

• The operation in Discourse webhook to Slack fails with this exact message or symptom: New topic notifications missing from Slack.
• The same failure repeats on retry with unchanged inputs.
• Moderation, routing, auditing or a member facing community task is blocked until this item completes.

Not for this skill when

• The message is an outage notice from the platform. Resolve that first, then return here if this problem remains.
• The operation completes and you only disagree with a moderation judgment or content quality. That is a policy review, not this failure.

Steps

1. Reproduce the failure with the smallest scope that still shows it in Discourse webhook to Slack, and copy the full message plus the post, thread, report or member involved into the run notes. Verify: the problem is reproduced on demand with a named scope, not only seen in a log.
2. Apply the specific fix for this problem: open the Discourse webhook delivery log, find the failed deliveries for new topic events, fix the cause shown there such as a paused webhook, a wrong event selection or a rejected payload, then create a test topic and watch it arrive in the Slack channel before declaring it restored. Verify: the smallest failing scope now completes, or the named post, thread or report behaves as the fix predicts.
3. Check the neighbouring posts, threads, reports or members that share the same setting, rule or workflow, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Rerun the original operation in Discourse webhook to Slack on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
5. Compare the result counts or status against the source in Discourse webhook to Slack so a silent partial success is caught before sign off. Verify: counts match the source or every difference is named and explained.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the problem, the fix applied and the evidence of success.

Why it happens

Webhook failures are recorded per delivery, so the log separates a webhook that never fires from one that fires and is rejected, and each cause has a different fix.

Variant phrasings

New topic notifications missing from Slack

The verbatim form searchers paste from the console, queue or report. Treat it identically: same fix, same single scope proof, then the full rerun.

How to fix - Discourse webhook failed new topic notifications missing from Slack error failure

The how to phrasing for the same failure in Discourse webhook to Slack. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

Discourse webhook to Slack troubleshooting for this failure

The symptom first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

Edge cases

• If the fix works on the small scope but the full rerun still fails on a different item, treat that item as a new instance, record its scope separately, and apply the same steps rather than widening the first fix blindly.
• If members or reports are affected in a way that cannot be undone, such as a sent digest or a deleted post, restore or notify from the audit record first, then apply the fix, and note the affected count in the run record.
• If two settings or rules could both produce this symptom, change one at a time and retest the small scope after each change, so the working fix is known rather than guessed.

Compatibility: Discourse webhook to Slack at current versions, plus the admin console, moderation queue or API the query names; no extra tooling beyond the source system access needed to verify counts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_ZRX4KRFoMDmAzjHvjAug

Resolved from the public thread: https://vectle.com/posts/pst_ZRX4KRFoMDmAzjHvjAug

Thread query: Discourse webhook failed new topic notifications missing from Slack error failure

TL;DR: Fix this in Discourse webhook to Slack by acting on the exact problem first: open the Discourse webhook delivery log, find the failed deliveries for new topic events, fix the cause shown there such as a paused webhook, a wrong event selection or a rejected payload, then create a test topic and watch it arrive in the Slack channel before declaring it restored. Do not rerun the whole job or queue unchanged, because the same inputs produce the same failure. Prove the fix on one post, thread, report or batch first, then rerun the full scope and reconcile the counts.