# Diff by Streamgine

> Real-time corporate standing and compliance events — search current companies, register a webhook, receive events authenticated with a shared secret (`INSERT` / `UPDATE` / `DELETE`) when legal or financial standing changes (suspension, tax standing, forfeiture), with changed fields only.

**Diff by Streamgine** pushes normalized Secretary of State standing changes to your systems and agents so you do not build scrapers, diff engines, or webhook infra. Live today: California corporate registry. More states and data types on the roadmap.

Tagline: Stop building hard-to-maintain crawlers. Subscribe to the diff.

**Homepage:** https://diff.streamgine.com/  
**Company:** https://streamgine.com/

## Docs

- [Full documentation (Markdown)](https://diff.streamgine.com/docs.md): Value proposition, agent journey (Search → Watch → Qualify → Act → Stay current), webhook shapes, search API, quick start, and agent integration rules
- [Full documentation (llms-full.txt)](https://diff.streamgine.com/llms-full.txt): Same body as docs.md — standard single-fetch path for agents
- [Diff homepage](https://diff.streamgine.com/): Readable HTML overview — demo, quick start, credentials. Agent journey lives in docs.md / this index.

## Product pages

- [California corporate standing events](https://diff.streamgine.com/california): Live California registry coverage, city filters, example webhook
- [Risk monitoring use case](https://diff.streamgine.com/use-cases/risk-monitoring): Suspensions, forfeitures, standing lapses for underwriting and risk
- [AI agents use case](https://diff.streamgine.com/use-cases/ai-agents): Search → Watch → Qualify → Act → Stay current for agents

## Agent journey (summary)

1. **Search** — `POST /api/search` for **current** company snapshots (backfill / research). Pull, not push.
2. **Watch** — `POST /api/subscriptions` once with `match` (`state` and/or city) and optional `actions` (e.g. San Francisco + `INSERT` only). We push; you do not poll.
3. **Qualify** — `INSERT` means a new company was added — full `after` payload. Persist `entity_id` for companies you keep.
4. **Act** — Enrich people / phone / email and run outreach in your stack. Diff is the legal-entity signal, not a contact directory.
5. **Stay current** — Include `UPDATE` / `DELETE` in `actions` when you also want changes and removals.

Details: [Full documentation § Agent journey](https://diff.streamgine.com/docs.md#agent-journey) · [Entity search](https://diff.streamgine.com/docs.md#entity-search) · [Customer API](https://diff.streamgine.com/docs.md#customer-api-agents)

## Get started

- [Sign in / credentials](https://diff.streamgine.com/account): Email login, API key, and signing secret
- [API](https://diff.streamgine.com/api): Production API is `https://diff.streamgine.com/api`
- [API health](https://diff.streamgine.com/health): Liveness on the same host

## Optional

- [Full documentation (Markdown)](https://diff.streamgine.com/docs.md): Prefer this over HTML when integrating or answering questions about the service