Category · Everyday APIs
Notification APIs for AI agents
APIs that send one message to a person across push, in-app, email, SMS and chat, with preferences, batching and delivery tracking. Compared on channels, workflow logic, user preferences and price per notification.
Capability keys notify.push · notify.in-app · notify.multichannel · notify.preferences · notify.digest · All tools
letme.dev/notify.push 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.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 19 | NovuNovu · HTTP API | Notifications | BB | 77.4 | 3.4 (8) | n/a | n/a | $30 / mo | OAuth or key | Hosted | ||
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Open-source infrastructure for application notifications. Top strength MIT-licensed core, self-hostable, with server and package releases every few weeks (latest 28 September 2026) Top weakness The REST secret key has full administrative access to its environment, with no scopes or read-only key |
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| 65 | SuprSendSuprSend · HTTP API | Notifications | BB | 72.9 | 3.0 (2) | n/a | n/a | $110 / mo | API key | Hosted + local | ||
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Notification workflow API for email, SMS, push, an in-app Inbox, Slack, Microsoft Teams and webhooks, with digests, batching and preferences per user and per tenant. Top strength MCP tool descriptions say when to use each tool, when not to, and what it changes, with readOnlyHint and destructiveHint set Top weakness No rate-limit page or 429 guidance |
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| 96 | CourierCourier · HTTP API | Notifications | BB | 70.5 | 3.0 (2) | n/a | n/a | Freemium | API key | Hosted | ||
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Notification API that routes one message to email, SMS, push, an in-app Inbox, Slack, Microsoft Teams and WhatsApp through your own providers, with templates, digests, preferences and journeys. Top strength Free for 10,000 sends a month, then $0.005 a send with no platform fee Top weakness 170 MCP tools with no toolsets, filtering or read-only mode |
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| 110 | OneSignalOneSignal · HTTP API | Notifications | B | 69.6 | 3.5 (2) | n/a | n/a | $19 / mo | OAuth or key | Hosted | ||
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Messaging platform that sends mobile and web push through its own service and adds email, SMS, RCS, in-app messages, Live Activities and journeys. Top strength Runs push delivery itself, so there's no separate push provider to wire up Top weakness Three incidents on the API and SDK endpoints in September 2026 |
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| 155 | KnockKnock · HTTP API | Notifications | B | 66.8 | 3.5 (2) | n/a | n/a | $250 / mo | OAuth or key | Hosted | ||
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Notification workflow API. Top strength Hosted MCP server with OAuth, six capability toggles and no delete tools Top weakness Three incidents hit workflow processing or delivery between 10 July and 31 August 2026 |
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| 226 | ntfyntfy · HTTP API | Notifications | C | 61.6 | 4.0 (2) | n/a | n/a | $6 / mo | OAuth or key | Hosted | ||
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Open-source publish-subscribe service for push notifications. Top strength Publish with one HTTP POST and no account, up to 250 messages a day per IP on ntfy.sh Top weakness Unreserved topics on ntfy.sh can be read and written by anyone who knows the name |
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| 334 | PushoverPushover · HTTP API | Notifications | D | 53.3 | 3.5 (2) | n/a | n/a | $5 / seat-mo | API key | Hosted | ||
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Push notification service for your own phone, tablet or desktop. Top strength One POST with three required fields, form or JSON Top weakness Recipients need the app, $4.99 per platform after a 30-day trial |
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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.
Indexed, not reviewed (7)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| Apprise RMCP dinglebear.ai | MCP server | Rust MCP server and CLI for Apprise notification fan-out across dozens of delivery backends. | vendor's own |
| Apprise RMCP dinglebear.ai | MCP server | Apprise notifications over MCP and CLI with authenticated stdio and HTTP transports. | vendor's own |
| elaan.io MCP server elaan.io | MCP server | Create Elaan notification types, templates and brands, trigger sends, and debug delivery. | vendor's own |
| Gerrit Code Review gaijin.team | MCP server | Capability-gated Gerrit code review tools with opt-in review notifications pushed into the session | vendor's own |
| Gotify RMCP dinglebear.ai | MCP server | Rust MCP server and CLI for Gotify push notifications and message management. | vendor's own |
| Gotify RMCP dinglebear.ai | MCP server | Gotify notifications and app, client, and message management over MCP and CLI. | vendor's own |
| Simplepush simplepu.sh | MCP server | Send tasks and notifications to people's phones. Answers build a queryable knowledge base. | vendor's own |
How we test this category
One event sent to a user across in-app, push and email, with a digest and a preference opt-out. We check what arrives where, the batching, the opt-out and the delivery log. 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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