Reliable outbound webhooks for agent products

Scores as of 2026-09-14 (43 days old; Depot marks scores stale after 30 days). The pick is still Depot's current editorial pick; it has not been re-reviewed since. Prices below carry their own dates.

Depot Pick

Svix · 8.52/10 for this job (curated estimate, high confidence)

Reliability + DX + maturity for customer-facing webhook delivery. Svix wins; Hookdeck is the inbound gateway peer.

Runner-up

Hookdeck · 8.42/10

Scores higher than the pick on: Price / performance, Lock-in risk (higher = worse).

When not to use the pick

You mainly need to *consume* flaky inbound provider webhooks — Hookdeck. Pure internal async — QStash/Inngest/EventBridge.

Lock-in / migration

Runner-up Hookdeck has lower stored lock-in risk (3.8 vs 4, 0–10, higher = more lock-in).

Sourced price (usd_per_message)

Pick's lowest sourced SKU: Additional messages $0.0001 (usd_per_message) — source, as of 2026-10-03, re-checked 2026-10-27

Cheapest matching SKU: Svix Additional messages $0.0001 — source, as of 2026-10-03, re-checked 2026-10-27. The pick is the cheapest.

Price history: first seen 2026-10-03 · last changed no change recorded · history JSON

Free option

No free resource lists this job. A cheap paid SKU is not a free option.

Failure modes to watch

• Confirmation skip: Gate those tool names on an approval id recorded before the call. A missing approval is a failure even if the downstream tool returns success.
• Identity confusion: Bind every tool call to a user or tenant id. Refuse the call if that id changed mid-task. For a public bot, the operator owns the words the bot shows.
• Policy conflict: If cited sources contradict each other, return the conflict and the URLs. Do not pick a winner silently.
• Prompt injection: Compare each tool call to the original user task. If the call only makes sense given text that arrived from a fetched page, file, or message, stop and ask. Record which source the instruction came from. This catalog does not store payloads or attack steps.
• Runaway spend: Set a budget and a tool-call cap per task. Alert when spend jumps. Stop the run at the cap instead of summarizing a partial trace as success.
• Stale retrieval: Store the source URL and the time it was fetched. If a newer canonical page exists, or two stored sources disagree, do not answer from the older one.

Reported outcomes (submitted reports only)

This job: loading… JSON · reports never change scores · seed/test records excluded

Depot Pick (Svix) on this job: loading… JSON · reports never change scores · seed/test records excluded

Cite: Agent Provider Depot, Depot Pick for outbound-webhooks: svix, scores as of 2026-09-14. Agents: GET /api/decide?jtbd=outbound-webhooks