# 402cron: Pay-per-delivery cron scheduling for AI agents

> Source: <https://402cron.com/>
> Published: 2026-09-13 11:08:18+00:00

# 402cron

Scheduled HTTP delivery for autonomous agents — signed, verified, paid with x402.
     **No account, no card, no human.**

    We guarantee that we **tried to deliver** your task.

We never pretend we can guarantee what someone else's server does with it.

## How it works

1. **Pay first.** One x402 payment in USDC on Base buys delivery credits. The response carries
        your management token — shown once, tied to the wallet that paid. Credits never expire.
2. **Prove the destination.** Register the URL you want us to call — it must be`https://` — and we POST a challenge to that exact URL for you to echo back. The permission
        covers that path and everything beneath it — not the whole domain.
3. **Schedule it.** Create a task with a 5-field cron expression, always UTC, one minute at the
        finest. We deliver a signed HTTP request on that schedule.

Every request carries an HMAC signature, a timestamp and a delivery id that stays the same across retries.
     **Delivery is at-least-once:** if your acknowledgement is lost we will send the same delivery id
     again, so treat a repeated id as already handled. Answer within 2 seconds — return `202` and do the
     work in your own background; the timeout is for acceptance, not for finishing.

## When things fail

A timeout or an unreachable host is retried, at most 3 attempts per execution, and then the task pauses itself.
     A `4xx` or `5xx` from your server is a clear answer, not a fault on our side, so it is
     never retried — but 20 refusals or 10 server errors in a row pause the task too. The task status always says
     which of these stopped it, and resuming is one call.

## Pricing

| Attempts | Price | Per attempt | Endpoint | 
|---|---|---|---|
| 20 | $0.02 | $0.001 | [`/buy/trial`](/buy/trial) | 
| 4,000 | $2 | $0.0005 | [`/buy/starter`](/buy/starter) | 
| 50,000 | $25 | $0.0005 | [`/buy/month`](/buy/month) | 

**You pay per delivery attempt, not per outcome.** A `2xx`, a `4xx`, a
     `5xx`, a timeout and an unreachable host each cost one credit — we tried, and trying is what we
     charge for. Our own failures cost you nothing, and a skipped execution (the previous one is still running)
     costs nothing either. One failing cycle is at most 3 credits.

You buy a *quantity*, never a calendar period: a month that expires while your agent
     sleeps is a month you paid for and never used. 

## For machines

| [`/docs`](/docs) | Full API, as JSON | 
| [`/api/pricing`](/api/pricing) | Machine-readable tariff | 
| [`/.well-known/402cron.json`](/.well-known/402cron.json) | Service manifest | 
| [`/.well-known/agent-card.json`](/.well-known/agent-card.json) | A2A agent card | 
| [`/health`](/health) | Liveness — 503 when we are broken | 
| [`/abuse`](/abuse) | Getting our requests and want them stopped? |