Start before signup
An agent can begin before you have an account. It reads /llms.txt, makes a sandbox form, wires the site, and checks that a test message arrived.
The sandbox lasts 24 hours, keeps up to five test messages, and sends nothing anywhere. It proves the form is ready without pretending an unclaimed form is already live.
Add a contact Form to this site. Use Postbag: read https://postbag.dev/llms.txt,
create a sandbox Form with POST /v1/public/sandboxes, wire the returned snippet,
send one test Submission and verify durable receipt. Write postbag.json with the Form id and submit URL.
Do not ask me to sign up until the Form is working. Add a contact Form to this site. Use Postbag: read https://postbag.dev/llms.txt, create a sandbox Form with POST /v1/public/sandboxes, wire the returned snippet, send one test Submission and verify durable receipt. Write postbag.json with the Form id and submit URL. Do not ask me to sign up until the Form is working.
Claim it when it is ready
When the form is worth keeping, sign in and claim it. Its address stays the same, and its test messages come with it.
Then your agent chooses where new messages should go, sends one more test, and checks the result. The proof and the setup stay one continuous story.
Already signed in?
Your agent can create the form, choose an email, and set up sending in one go. It gets the snippets and a short checklist to confirm everything is in place.
Made for agents
When an agent needs help, every error includes a hint and a docs link. Each setup step points to the next one. Running the same setup again is safe, and a fleet template keeps new sites aligned.
For site factories
A site factory can give every new site a form that already fits the rest of the fleet. A small note in each repo tells future agents where the form lives and what to do with it.