How can an agent schedule a call-back or a repeating job after the chat ends?

If a machine of yours stays on, cron runs a command at the times you set: it is free and needs nothing new.

Your coding agent may schedule its own next run: Claude Code's cloud scheduled tasks start a new session on a schedule even with your computer off, at most once an hour, on a paid Claude plan.

A service outside your agent cannot reach into a chat that has ended: either a job starts at that time, or a message waits until the agent next starts. Without a machine of yours, a GitHub Actions schedule runs a job at most every 5 minutes, and free schedulers call an address that you run. AgentMart's Wake-up calls deliver a message once or on a repeating rule, to an inbox your agent reads at its next start or to an https address that you run, for $1 per 30 days, plus a Webhook inbox ($1 per 30 days) to receive them without a server.

Free ways

Checked on 2026-10-24. Facts about other services come from their own pages; the sources are under each one.

Side by side

When AgentMart fits

Wake-up calls: Schedule up to 100 callbacks, 1 minute to 30 days ahead, plus up to 10 repeating rules (every N minutes, hourly, daily or weekly in a time zone). Each call is delivered to an https URL you run or to a Webhook inbox you own (bought separately). A rule's missed runs are reported in a Webhook inbox: one you name for alerts, or else its target inbox. $1 per 30 days, plus Webhook inbox ($1 per 30 days).

Your human pays first, with a top-up of at least $5 by card, unless a new account uses the free start (its rules: https://agentmart.ciphyr.ai/llms/free-start.md). Unused balance expires 12 months after your last top-up or purchase. Any top-up or purchase starts the 12 months again. Our guarantee and your human's legal rights are in the terms.

• One-time calls 1 minute to 30 days ahead, up to 100 waiting at once, each with up to 8 KB of JSON. We send due calls once a minute, so a call comes up to about a minute after its time, never before.
• Up to 10 repeating rules: every 5 to 10,080 minutes, hourly, daily, or weekly on the days you choose, at a time in a time zone. A run that fails after every retry counts as missed, as does a run we could not start within 15 minutes of its time. A message about the misses, with how many, goes to the target inbox or to another inbox you name, at most once per rule every 60 minutes; with an https target and no inbox named, none is sent.
• A failed delivery is retried 3 times, after 1, 5 and 15 minutes. An https address must answer with a 2xx within 5 seconds; any other answer, or none in time, is a failed try.
• Delivered to one of your webhook inboxes (Webhook inbox, $1 per 30 days), which your agent reads at its next start, or posted to a public https address on the standard port (443). A call starts nothing by itself: something must read the inbox or answer at the address.
• A call must fall before the plan ends. Who can use it: Only passports of the paying owner can use the instance.

Ask your human before you buy: it spends their balance. Over MCP (https://agentmart.ciphyr.ai/mcp):

buy {"item": "wake-up-calls"}
buy {"item": "webhook-inbox"}
schedule_create {"instance_id": "<wake-up calls instance_id>", "repeat": {"type": "daily", "at": "09:00"}, "time_zone": "Europe/Istanbul", "target": {"type": "inbox", "inbox_instance_id": "<webhook inbox instance_id>"}, "payload": {"task": "Check the nightly build"}}
# Once instead: wakeup_schedule with "at", 1 minute to 30 days ahead. At the start of every session:
inbox_messages {"instance_id": "<webhook inbox instance_id>"}

Over HTTP, with a session token your signing code made (the manual's Auth page: https://agentmart.ciphyr.ai/llms/auth.md):

curl -X POST https://agentmart.ciphyr.ai/v1/orders \
  -H "Authorization: Bearer $AGENTMART_SESSION" -H "Content-Type: application/json" \
  -d '{"item": "wake-up-calls", "idempotency_key": "my-wakeups-1"}'
curl -X POST https://agentmart.ciphyr.ai/v1/orders \
  -H "Authorization: Bearer $AGENTMART_SESSION" -H "Content-Type: application/json" \
  -d '{"item": "webhook-inbox", "idempotency_key": "my-wakeup-inbox-1"}'
curl -X POST https://agentmart.ciphyr.ai/v1/utilities/<wake-up calls instance_id>/schedules \
  -H "Authorization: Bearer $AGENTMART_SESSION" -H "Content-Type: application/json" \
  -d '{"repeat": {"type": "daily", "at": "09:00"}, "time_zone": "Europe/Istanbul", "target": {"type": "inbox", "inbox_instance_id": "<webhook inbox instance_id>"}, "payload": {"task": "Check the nightly build"}}'
# At the start of every session:
curl https://agentmart.ciphyr.ai/v1/utilities/<webhook inbox instance_id>/messages -H "Authorization: Bearer $AGENTMART_SESSION"

When not to use AgentMart

• A machine of yours stays on: cron is free.
• Your coding agent can schedule its own runs: a wake-up call starts no agent, it only delivers a message.
• You need runs more often than every 5 minutes, or a one-time call more than 30 days ahead.
• Your human does not want to keep a prepaid balance.

AgentMart is sold by Ciphyr Tech OÜ. Terms: https://agentmart.ciphyr.ai/terms. The agent manual: https://agentmart.ciphyr.ai/llms.txt.