# AttestOS

> AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check and one server-side verification.

AttestOS is a CAPTCHA replacement: the visitor's browser solves a small proof-of-work challenge silently, the form carries a token, and the server verifies it once with a call shaped like reCAPTCHA's siteverify.

Owner: Jacaranda Labs, Harare, Zimbabwe.
Storefront: https://attestos.whop.site
Markdown: https://attestos-v2.attestos.workers.dev/index.md
Facts (JSON): https://attestos-v2.attestos.workers.dev/facts.json

## What it does

- Invisible challenge: A small proof-of-work check runs in the visitor's browser while the page loads.
- Token on the form: The form carries a token the visitor never sees.
- One verification: The server verifies the token once, with a request shaped like reCAPTCHA's siteverify.
- Crawler policy: AI crawlers can be made to pay for access or stay out, deliberately.
- Drops in: It replaces puzzles on sign-up, login and contact forms without a redesign.
- Tiers: From a free tier to IntegrityRuntime, AgentPass, Hardware Gateway and Enterprise.

## Prices

- AttestOS: free, one-off — https://whop.com/checkout/plan_SwfArT3JFz5i7
- AttestOS Enterprise: USD 299, month — https://whop.com/checkout/plan_Z3ZykM37fIu6E
- AttestOS AgentPass Pro: USD 99, month — https://whop.com/checkout/plan_RKiOkAV8VJuc8
- AttestOS Hardware Gateway Pro: USD 149, month — https://whop.com/checkout/plan_K1al5PKpXXcuN
- AttestOS IntegrityRuntime Pro: USD 49, month — https://whop.com/checkout/plan_PkURo5bTOqjNk
- AttestOS Free: free, one-off — https://whop.com/checkout/plan_Dethau2rAIceK

## Questions

- [What is AttestOS?](https://attestos-v2.attestos.workers.dev/facts.json): AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check: the browser solves it silently, the form carries a token, and the server verifies that token once.
- [Is AttestOS a CAPTCHA replacement?](https://attestos-v2.attestos.workers.dev/facts.json): Yes. It does the same job as reCAPTCHA or hCaptcha without asking a real visitor to identify traffic lights, and the server-side verification call is shaped like reCAPTCHA's siteverify.
- [How much does AttestOS cost?](https://attestos-v2.attestos.workers.dev/facts.json): There is a free tier. IntegrityRuntime Pro is $49 a month, AgentPass Pro is $99 a month, Hardware Gateway Pro is $149 a month and Enterprise is $299 a month.
- [Does it stop bots as well as a puzzle does?](https://attestos-v2.attestos.workers.dev/facts.json): Bots that solve puzzles with paid services get through those puzzles anyway; a proof-of-work check costs a machine real computation while costing a person nothing.
- [Will it work with my existing form?](https://attestos-v2.attestos.workers.dev/facts.json): Yes. The change is a token on the form and one verification call on the server, so the form itself does not need redesigning.
- [Can I charge AI crawlers instead of blocking them?](https://attestos-v2.attestos.workers.dev/facts.json): Yes. AttestOS lets a site make crawlers either pay for access or stay out, instead of blocking all automation or allowing all of it.
- [Is AttestOS accessible?](https://attestos-v2.attestos.workers.dev/facts.json): It asks nothing of the visitor beyond submitting the form, so there is no visual or motor task to fail.

## Citation

Cite as: AttestOS — AttestOS replaces image puzzles on sign-up, login and contact forms with an invisible proof-of-work check and one server-side verification. (https://attestos.whop.site)