Category · Developer & infrastructure
Webhook and event delivery infrastructure for AI agents
Infrastructure that carries events between systems. Sending webhooks with retries and signatures, receiving and replaying them, queued and scheduled HTTP calls and realtime channels. Compared on delivery guarantees, retries, replay, signature checks and price per message.
Capability keys events.webhooks-send · events.webhooks-receive · events.queue · events.schedule · events.realtime · All tools
letme.dev/events.webhooks-send picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
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| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22 | HookdeckHookdeck Technologies Inc. · HTTP API | Webhooks | BB | 76.9 | none | n/a | n/a | $39 / mo | API key | Hosted + local | ||
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Hookdeck Event Gateway is a hosted service that receives webhooks, queues them and sends them on to HTTP destinations with filters, transformations, retries and replay. Agents use its REST API or the stdio MCP server in the Hookdeck CLI. Top strength API keys take read or write scopes per resource family, project and resource grants, and rollover with a 0, 1 or 24 hour overlap Top weakness Go SDK last committed 11 December 2024 and the TypeScript SDK is marked deprecated, so current clients are the CLI, Terraform and raw HTTP |
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| 51 | AblyAbly Realtime Ltd · HTTP API | Webhooks | BB | 75 | none | n/a | n/a | $29 / mo | API key | Hosted | ||
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Hosted realtime messaging from Ably Realtime Ltd in London. Clients publish and subscribe on channels over WebSocket, SSE or MQTT, with a REST API, presence, message history, outbound and inbound webhooks, and AMQP queues. Top strength API keys and tokens carry per-channel capabilities (publish, subscribe, history and 16 others), and tokens can be revoked by client, channel or revocation key Top weakness No official MCP server. The Ably CLI's built-in one was removed in v0.17.0 on 8 March 2026 |
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| 62 | SvixSvix Inc. · HTTP API | Webhooks | BB | 74 | none | n/a | n/a | $20 / mo | API key | Hosted | ||
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Svix is a webhook sending service with a hosted REST API and an MIT-licensed server. One call creates a message, and Svix signs it, sends it to each subscribed endpoint, retries failures and logs every attempt. Top strength OpenAPI 3.1 spec with 141 operations, each described, and code samples on 140 of them Top weakness An API key can make any API call for its environment. No read-only or scoped API key was found in the reviewed documentation |
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| 82 | Upstash QStashUpstash · HTTP API | Webhooks | BB | 72.3 | none | n/a | n/a | $0.05 / GB | OAuth or key | Hosted | ||
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Upstash QStash is a hosted HTTP message queue and scheduler. A caller publishes a request to its REST API, and QStash sends it to a public URL with retries, delays, cron schedules, FIFO queues and signed requests. Top strength Public OpenAPI 3.1 file with 43 operations for messages, queues, schedules, URL groups, the dead letter queue, logs and signing keys Top weakness One full-access token and one read-only token per region. No per-queue or per-destination scopes were found |
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| 276 | ConvoyFrain Technologies Inc. · HTTP API | Webhooks | B | 62.2 | none | n/a | n/a | $99 / mo | API key | Local | ||
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Convoy is a webhooks gateway from Frain Technologies. It sends outgoing webhooks with retries and signatures and receives incoming ones, through an HTTP API on Convoy Cloud or a self-hosted, source-available server. Top strength Public OpenAPI 3.0 spec with 68 operations, plus llms.txt and Markdown copies of every documentation page Top weakness Advisory GHSA-p5vg-v7mj-f6q4 (24 July 2026, High) let a caller on one project read another project's source and broker credentials before v26.6.8 |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
How we test this category
The same thousand events sent through each listing to an endpoint that fails one request in ten. We check retries and their schedule, ordering, duplicate delivery, signature verification, replay of a failed event and the delivery log. In this run listings are graded from public evidence against the published checklist. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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