Targetval Gateway

Biologic target validation API gateway — robust, key-enforced, and wired to live public data feeds (no stubs, no placeholders).

• Live service: https://targetval-gateway.onrender.com
• Interactive OpenAPI UI: add /docs to the base URL (FastAPI default).

This gateway fronts 30+ programmatic endpoints for target–disease evidence aggregation across genetics, expression, pathways, tractability, safety, and IP.

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✨ Features

• ✅ Real API key enforcement via middleware (app/middleware/api_key.py).
• ✅ Environment-variable config with .env.example checked in.
• ✅ EFO fallback: supports both ?efo=EFO_… and free-text ?condition=asthma.
• ✅ Bounded retries & backoff: resilient HTTP client for upstream APIs.
• ✅ Structured Evidence payloads: with status, fetched_n, citations, and timestamp.
• ✅ NO_DATA vs ERROR: upstream empties return status="NO_DATA", true failures → ERROR.

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