Every API, one clean contract.

Inspect a public URL for source-reliability: reachability, canonical + full redirect chain, title/publisher/published+updated dates, language, official-likelihood, and a stale/archived (wayback) signal.

{
  "url": "https://openai.com/api/pricing/",
  "official_for": "openai"
}

Resolve the OFFICIAL URL a curated provider publishes for a given need (pricing/docs/changelog/status/legal/model_card) + why it is official (domain match + domain age via whois). Curated whitelist only.

{
  "entity": "OpenAI",
  "need_type": "pricing"
}

Check whether one or more public source URLs SUPPORT a claim: supported|contradicted|not_found|unclear + the evidence snippet + confidence. Deterministic phase-1 (quote + number matching) — a source-evidence check, NOT a truth oracle.

{
  "claim": "Claude Opus 4.5 costs $5 per million input tokens",
  "url": "https://docs.claude.com/en/docs/about-claude/pricing"
}

Current developer/LLM pricing for a curated provider, parsed live from the provider's own pricing page/API. Each row: model, input/output per-1M-token USD, source_url, last_seen_at, unit, currency, normalization_notes.

{
  "provider": "openrouter",
  "model": "claude"
}

Compare current pricing across several curated providers (optionally filtered to a model substring) → normalized per-1M-token USD, cheapest-first, each traceable to its source_url + last_seen_at.

List the curated provider whitelist + each provider's capabilities (which need_types and structured pricing are supported) and parse-surface metadata. The honest denominator for official_source / pricing.