# Kodiak — verifiable fact-checking

> Kodiak checks a factual claim against real sources and returns a verdict (supported / false / mixed / unsupported), a calibrated confidence (0-100), the cited sources, and a tamper-evident certificate that anyone can verify. It exists so an agent can avoid stating unverified or confabulated facts — and prove the check afterward.

Every certificate is hash-chained and externally anchored (Buoy + OpenTimestamps/Bitcoin), so a verdict's provenance is provable after the fact, not merely asserted. Pricing is a few cents per check (depth 1-5), paid from prepaid credits — no per-call human in the loop.

## API
- Check a claim: `POST https://azurecarbon.com/api/check` — body `{ "claim": "...", "depth": 1-5 }`, header `Authorization: Bearer <api-key>`. Returns verdict, confidence, citations, sub-claims, certificate_id, chain_hash.
- Verify a certificate: `GET https://azurecarbon.com/verify/{certificate_id}` — recomputes the hash chain and reports integrity. No key required.
- Credits & pricing: `GET https://azurecarbon.com/api/credits`.
- Get an API key: https://azurecarbon.com

## MCP server
- Kodiak MCP server (stdio JSON-RPC). Tools: `kodiak_check_claim` (depth 1-3 sync; depth 4-5 returns a job_id, poll with `kodiak_check_status`), `kodiak_check_status`, `kodiak_verify_certificate`, `kodiak_credits`.
- Install: `npx -y kodiak-mcp` (npm) with env `KODIAK_API_KEY` (optional `KODIAK_URL`, default https://azurecarbon.com).
- MCP registry name: `com.azurecarbon/kodiak`. Source: https://github.com/bildow/kodiak

## Discovery
- A2A agent card: https://azurecarbon.com/.well-known/agent-card.json
- ARD catalog: https://azurecarbon.com/ai-catalog.json