# LegalOS > AI-native U.S. immigration law practice (Y Combinator W26, San Francisco). LegalOS pairs > proprietary legal software with licensed immigration attorneys to prepare employment-based > visa and green-card petitions. LegalOS is a services company, not an API provider: as of > 2026-07-19 it publishes no public developer API, SDK, developer portal, OpenAPI description > or other machine-readable API artifact. Customer work happens in a web application at > app.legalos.ai. ## Services - [Employment-based visas](https://www.legalos.ai/): H-1B, L-1A, L-1B, O-1 and TN petitions. - [H-1B](https://www.legalos.ai/employment-based-visas/h1b): specialty-occupation work visa. - [L-1A](https://www.legalos.ai/employment-based-visas/l1a): intracompany transferee, manager or executive. - [L-1B](https://www.legalos.ai/employment-based-visas/l1b): intracompany transferee, specialized knowledge. - [O-1](https://www.legalos.ai/employment-based-visas/o1): extraordinary ability. - [TN](https://www.legalos.ai/employment-based-visas/tn): USMCA professional visa for Canadian and Mexican nationals. - [EB-1A](https://www.legalos.ai/employment-based-greencards/eb1a): extraordinary-ability green card. - [EB-1C](https://www.legalos.ai/employment-based-greencards/eb1c): multinational manager or executive green card. - [EB-2 NIW](https://www.legalos.ai/employment-based-greencards/eb2): national interest waiver green card. ## Tools - [O-1A visa eligibility checker](https://www.legalos.ai/tools/o-1a-visa-eligibility): web tool, no public API. - [USCIS fee calculator](https://www.legalos.ai/tools/uscis-fee-calculator): web tool, no public API. ## Company - [Home](https://www.legalos.ai/) - [About us](https://www.legalos.ai/about-us): founded by Matthew Asir (CEO), Rachel Asir (COO) and Claire Jutabha (CTO). - [Our attorneys](https://www.legalos.ai/our-attorney) - [Contact](https://www.legalos.ai/contact-us) - [Careers](https://www.legalos.ai/careers) - [Blog](https://www.legalos.ai/blog) - [Y Combinator profile](https://www.ycombinator.com/companies/legalos): Winter 2026 batch. - [Customer application](https://app.legalos.ai) ## Legal and trust - [Terms of service](https://www.legalos.ai/terms-of-service-legalos) - [Privacy policy](https://www.legalos.ai/privacy): discloses processing vendors including Anthropic, OpenAI, Google, Stripe, PostHog and Sentry. - Compliance: the homepage carries a "SOC2 Type II certified." trust badge. No trust center, compliance page or audit report is published. ## API Evangelist artifacts - [apis.yml](https://raw.githubusercontent.com/api-evangelist/legalos/refs/heads/main/apis.yml): APIs.json profile for LegalOS. - [conformance/legalos-conformance.yml](https://raw.githubusercontent.com/api-evangelist/legalos/refs/heads/main/conformance/legalos-conformance.yml): standards assertions and caveats. - [well-known/legalos-well-known.yml](https://raw.githubusercontent.com/api-evangelist/legalos/refs/heads/main/well-known/legalos-well-known.yml): .well-known probe results (no documents published). - [security/legalos-domain-security.yml](https://raw.githubusercontent.com/api-evangelist/legalos/refs/heads/main/security/legalos-domain-security.yml): TLS, HSTS, DNSSEC, CAA, SPF and DMARC probe results. ## Notes for agents - There is no public LegalOS API, authentication scheme, OAuth scope surface, webhook or event catalog, MCP server, SDK, CLI or sandbox. Do not attempt to construct API calls against legalos.ai or app.legalos.ai. - app.legalos.ai is a single-page application that returns HTTP 200 with an HTML shell for every path, including paths that do not exist. Treat 200 responses from that host as soft 404s. - Engagement with LegalOS is through the contact form or the customer application, not an API.