Fillo
Show HN: A guestbook with no input boxes
Last checked:
What is Fillo?
Fillo is a service that makes web forms readable and submittable by AI agents. Agents read the form structure, collect answers through chat conversation, display the results, and submit after human approval—using the same validation rules as the human-facing form.
Fillo pricing
Pricing model: Freemium
Fillo pros
- Agents can fill forms without browser automation or inferring page layouts
- Single form definition serves both people and agents—no separate workflows needed
- Built-in validation ensures agent submissions meet form requirements
- Discovery through standard URLs and llms.txt integration
Fillo cons
- Requires publishers to provide agent-readable form definitions; not all forms support this yet
- Agents still require human approval before submission
- Limited to structured form data collection
Frequently asked questions about Fillo
How does an agent fill in the form?
It reads the published form structure, asks you for missing answers in chat, shows the finished response, and submits after you approve.
Does the form still work for people?
Yes. The page and agent use the same published form—no need to maintain separate workflows.
How does the agent find the form it can read?
The human page points to its agent-readable version. Forms can also be listed in docs or llms.txt files.
Why not let the agent use a browser to fill the page?
Agents would have to infer meaning from layout and markup. Agent-readable forms provide stable field IDs, allowed values, validation rules, and submission routes instead.