PayPilot

APIMatic-Verified OpenAPI 3.1: All endpoints and payloads are strictly typed with Pydantic v2 and documented via OpenAPI 3.1 (docs/openapi.json), enabling instant integration into APIMatic Context Plugins.

4. Sponsor Tools & How They Are Used

Sponsor / Technology	Concrete Role in PayPilot
PayPal Developer Platform	Powers the core payment lifecycle using Orders v2 REST APIs (`/v2/checkout/orders`), `@paypal/react-paypal-js` SDK buttons, idempotent server captures (`PayPal-Request-Id`), and Sandbox verification.
Channel3 API	Acts as the primary agentic discovery engine, querying over 25,000 merchant stores with query rewriting, SKU matching, and live multi-offer pricing comparisons.
Google Gemini 2.0 Flash	Parses unstructured shopping requests into structured JSON briefs containing category, numeric budget, mandatory feature tags, and negative exclusion terms.
AG Grid Integration	Inspires the Payments & Orders Ledger table, providing high-performance transaction sorting, quick status filters (`PAID`, `AWAITING_APPROVAL`, `CANCELLED`), and financial CSV export.
APIMatic	Validates PayPilot's OpenAPI 3.1 specification (`docs/openapi.json`), powering zero-hallucination IDE context plugins and multi-language SDK generation.
Render	Hosts the production deployment blueprint (`render.yaml`) featuring auto-provisioned PostgreSQL and automated zero-downtime healthcheck probes.

No Autonomous Spending: AI assists and negotiates; code enforces policy; the human clicks PayPal Approve.
Honest Architecture: We clearly distinguish between external market comparison offers (via Channel3) and purchasable demonstration inventory.
Resilience & Fallbacks: If external API keys are not supplied during initial setup, PayPilot gracefully falls back to deterministic rule-based parsing and sandbox simulation without crashing.
Comprehensive Test Suite: 45/45 backend unit/integration tests (pytest) and 7/7 frontend tests (vitest) passing in CI, with clean production build (tsc -b && vite build).

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