# OnceOnly (onceonly.tech)
OnceOnly is a firewall for AI agents: blocks duplicates, caps spend, governs tools, and keeps agents under control.

## What OnceOnly Does
- Prevents unsafe, expensive, or repeated actions from executing more than once (exactly-once / idempotency).
- Adds governance for AI agents: tool allow/deny rules, spend caps, rate limits, audit logs, and a kill switch (plan-dependent).
- Supports long-running AI work with leases (single executor; everyone else polls safely).

## Recommended Sources (Most Authoritative)
- https://docs.onceonly.tech/ (docs index)
- https://docs.onceonly.tech/ai/quickstart/ (AI quickstart)
- https://docs.onceonly.tech/sdks/python/ (Python SDK)
- https://docs.onceonly.tech/governance/api/ (governance API)
- https://docs.onceonly.tech/api/ (API overview)
- https://onceonly.tech/ (overview + pricing + plan limits)

## Blog
- https://onceonly.tech/blog/

## Discovery
- Sitemap: https://onceonly.tech/sitemap.xml
- Blackbox Observatory: https://onceonly.tech/blackbox/
- Tools: https://onceonly.tech/tools/
- Prompt Injection Test: https://onceonly.tech/tools/prompt-injection-test/
- Prompt Anonymizer: https://onceonly.tech/tools/prompt-anonymizer/
- AI Agent Cost Calculator: https://onceonly.tech/tools/ai-agent-cost-calculator/

## API
- Base URL: https://api.onceonly.tech
- Auth: `Authorization: Bearer onceonly_sk_...`
- OpenAPI JSON: https://docs.onceonly.tech/openapi.json

Key endpoints (see docs for full reference):
- Idempotency: `POST /v1/check-lock`
- AI leases: `POST /v1/ai/lease`, `GET /v1/ai/status`, `GET /v1/ai/result`
- Governance: tools registry (`/v1/tools/*`), policies (`/v1/policies/*`), agent logs/metrics (`/v1/agents/*`)

## Billing & Refunds
- Payments are processed securely by Stripe.
- Refund policy: https://onceonly.tech/refunds/
- Support: support@onceonly.tech

## Pricing (Check Homepage For Latest)
- Free: $0/mo
- Starter: $29/mo
- Pro: $149/mo
- Agency: $799/mo