Notification infrastructure
Your agent finished.
Tell a human.
One HTTP call puts a notification on a specific person’s phone, tablet, laptop — every device they’ve registered. Built for the case where the sender is a machine and the reader is asleep.
$ curl -X POST https://api.agentsignal.net/v1/messages
-H "Authorization: Bearer as_live_…"
-d '{"to":"u_8fk2…", "title":"Deploy finished",
"body":"prod is green", "priority":1}'
{"ok":true,"deliveries":{"total":3,"sent":3}}What makes it different
Built for agents
Idempotency keys mean a retrying agent cannot double-notify. There is an MCP server, so notifying a human is just another tool call.
No seat restrictions
Pricing is notification volume, full stop. Invite the whole team. Register every device you own. Neither changes the bill.
Sandboxes
A throwaway label whose messages are swept clean on a schedule and can never reach a real customer. Point an agent at it and delete the whole thing in one call.
Your brand, not ours
Per-label name, icon, accent colour and sound, applied on the device as the notification arrives.
Setup and takedown
A label, a person, and a pairing code in one call. Delete all of it in one call, with nothing retained.
Pay per notification
An agent with a wallet and no account can pay for a single send over HTTP 402, in USDC on Base.
Five levels of urgency
Identical to Pushover’s, so an existing integration can be repointed without touching its payloads.
| -2 | Lowest | No alert. Badge only. |
| -1 | Low | Alert, no sound. |
| 0 | Normal | Default behaviour. |
| +1 | High | Bypasses quiet hours. |
| +2 | Emergency | Repeats until acknowledged. |
Emergency alerts re-alert on every registered device until someone acknowledges, then fire your webhook to say who did and when.
Pricing
Free
$0
per month
10,000 deliveries
Starter
$5
per month
100,000 deliveries
Growth
$10
per month
1,000,000 deliveries
Unlimited
$50
per month
Unmetered
A delivery is one message reaching one device, sandbox or not. Or skip the subscription entirely: an agent with a wallet pays $0.0002 a delivery in USDC at the moment it sends, no account at all — over x402.