Glossary

What is human in the loop?

Human in the loop means an automated or AI system pauses at chosen points for a person to review, approve or complete a step. For AI agents, typical checkpoints are payments, entering passwords, accepting terms, solving CAPTCHAs and any action that can't be undone. It keeps automation fast while leaving control with people.

By the AgentLaunch team · Updated November 2026 · Also called HITL, human approval

Steps that should need a human

Step Why
Payments Spending money
Passwords and 2FA Credential safety
Accepting terms Legal agreement
CAPTCHAs Built to require a human
Sending messages Speaking for you
Deleting data Irreversible

Of the 352 directory submit flows we recorded, 56 had a CAPTCHA, 12 an email code and 28 ended at a payment page: those are the natural pause points for a submission agent.

Designing checkpoints

  • Group approvals: "these 5 directories have paid options, approve which?"
  • Show exactly what will happen before approval.
  • Let the agent continue other work while waiting.
  • Log decisions for later review.

Example

An agent submitting to 40 directories works through 34 alone, collects 4 CAPTCHAs and 2 paid choices, and asks the founder once. She solves the CAPTCHAs in two minutes and declines both payments.

FAQ

Does human in the loop slow agents down?

A little; batching checkpoints keeps it manageable.

Can an agent skip approvals if I trust it?

For low-risk steps, yes; keep payments, credentials and irreversible actions gated.

Is human in the loop required by law?

Some regulations require human oversight for certain automated decisions.

Sources

  1. Anthropic: Building effective agents
  2. OpenAI: A practical guide to building agents

Data

All glossary terms · AI agent and automation terms