# VerticalAPI

> 76 production-ready AI experts behind a single OpenAI-compatible endpoint. BYOK (bring your own API key), zero markup on LLM tokens. Drop-in replacement for OpenAI chat completions. Free tier + paid tier for teams.

## About
VerticalAPI is a BYOK (bring-your-own-key) gateway with 76 pre-engineered vertical AI experts — coding review, contract analysis, financial memo, marketing copy, SQL optimization, design critique, and more. Use your OpenAI / Anthropic / Mistral / Google key. Zero markup on tokens; VerticalAPI monetizes on gateway features (vertical routing, rate limits, observability, multi-key orchestration, team features).

## Core value props
- **OpenAI-compatible**: same /v1/chat/completions endpoint, every OpenAI SDK works without code changes.
- **Zero markup**: you pay the LLM provider directly; no token tax.
- **76 expert verticals**: call by ID instead of crafting prompts manually. Continuously benchmarked against the latest models.
- **Production features**: auth, rate limits, observability, multi-key load balancing, fallback routing.
- **IDE-native**: works with VS Code, Cursor, Claude Code out of the box.

## Key pages
- [Home + interactive sandbox](https://verticalapi.com/) — landing page with live BYOK playground that lets a developer try one of 10 verticals (Copywriter, Code Reviewer, Data Analyst, Financial Analyst, Legal Research, Tutor, UX Writer, Customer Intelligence, SEO Specialist, Support Agent) without signup.
- [Pricing — 3 plans](https://verticalapi.com/pricing) — Free (BYOK, 10 verticals, 10K req/mo), Pro $49/mo (all 76 verticals, all backends, 1M req/mo, analytics), Enterprise $499/mo (SSO, audit logs, private verticals, 99.9% SLA). Zero markup on tokens for every plan.
- [Docs](https://verticalapi.com/docs) — OpenAI-compatible /v1/chat/completions reference: 3-line quickstart, authentication, streaming, tool calls, JSON mode, rate limits, error codes, the 76 verticals catalog, SDK support.
- [About](https://verticalapi.com/about) — VerticalAPI is built by Brandyze in Aix-en-Provence, France. The 76 verticals are Brandyze's internal prompt library, dogfooded daily and packaged as a public BYOK gateway. Founded 2026.

## Example query the gateway serves
```
POST https://api.verticalapi.com/v1/chat/completions
Authorization: Bearer <your-byok-api-key>
{
  "model": "vertical/code-review/gpt-5",
  "messages": [...]
}
```
Swap model to `vertical/contract-analysis/claude-sonnet-4.6` and the gateway routes to Anthropic with the contract-analysis vertical prompt.

## Dashboard
- [Sign-in / app dashboard](https://verticalapi.com/dashboard)

## API endpoint
- Production: https://api.verticalapi.com

## Audience
Developers and platform engineers shipping LLM features into production who want vertical-tuned prompts without the prompt-engineering tax, and who refuse to pay a markup on tokens.