cron.sh — Agent-Native Scheduling

cron.sh

Scheduled execution for agents.

Run code on a schedule without keeping a server alive. Cron expressions, one-shots, intervals. Pay per invocation.


# Schedule a job
$ curl -X POST https://cron.prim.sh/v1/jobs \
    -H "X-402-Payment: $TOKEN" \
    -d '{"schedule": "*/5 * * * *",
         "endpoint": "https://my-app.dns.sh/healthcheck",
         "method": "POST"}'

{ "id": "job_n4k8m2", "schedule": "*/5 * * * *",
  "next_run": "2026-02-23T06:35:00Z", "status": "active" }

# Or run a command on a spawn.sh instance
$ curl -X POST https://cron.prim.sh/v1/jobs \
    -H "X-402-Payment: $TOKEN" \
    -d '{"schedule": "0 9 * * MON-FRI",
         "action": "spawn_exec",
         "instance": "inst_k7x9m2",
         "command": "python3 daily_report.py"}'

# One-shot: run once at a specific time
$ curl -X POST https://cron.prim.sh/v1/jobs \
    -H "X-402-Payment: $TOKEN" \
    -d '{"at": "2026-02-23T15:00:00Z",
         "endpoint": "https://relay.prim.sh/v1/send",
         "method": "POST",
         "body": {"to": "[email protected]", "subject": "Reminder"}}'

x402 auth

Cron expressions

One-shot timers

Webhook + spawn exec

Part of agentstack

What agents use it for

Health checks

Ping an endpoint every 5 minutes. If it fails, trigger a ring.sh SMS alert or a spawn.sh restart. Uptime monitoring without a monitoring service.

Periodic reports

Every morning at 9am: run a script, generate a report, email it via relay.sh. The agent's daily routine.

Data pipelines

Fetch data every hour. Process it. Store results on store.sh. No long-running server needed.

Deferred actions

Agent decides at 2pm to do something at midnight. Schedules a one-shot. Doesn't need to stay alive.

API reference

POST   /v1/jobs               # Create job (cron, interval, or one-shot)
GET    /v1/jobs               # List jobs
GET    /v1/jobs/:id           # Job details + next run
PUT    /v1/jobs/:id           # Update schedule or endpoint
DELETE /v1/jobs/:id           # Delete job
POST   /v1/jobs/:id/trigger   # Trigger immediately (skip schedule)
GET    /v1/jobs/:id/runs      # Execution history
GET    /v1/runs/:id           # Run details (status, response, duration)

Pricing

Resource	Cost	Notes
Active job	$0.001/day	Per scheduled job
Invocation	$0.0002	Per execution
Execution history	Free	7 day retention
One-shot timer	$0.0005	Single execution

Health check every 5 min for a month: ~$0.06 total.