# Keep product facts consistent across website, API and MCP. - working worksheet

Reviewed alongside the Eli guide: https://hireeli.io/resources/website-api-mcp-product-fact-consistency

## Decision to make

Create one approved source of truth for human and agent buyers

Owner: ____________________
Review date: ____________________
Canonical page or destination: ____________________

## Buyer questions

- [ ] How can website, API and MCP answers stay consistent?
- [ ] Which product facts need expiry dates?
- [ ] What should an agent return when facts conflict?

## Evidence-led work plan

### 1. Define the canonical fact model

Store fact value, scope, source, owner, verification state, last review and expiry.

Evidence or artifact: ____________________
Status: [ ] not started  [ ] working  [ ] verified  [ ] blocked

### 2. Render, do not rewrite

Public pages can explain facts for people while APIs and MCP return structured fields, but both should resolve to the same approved object.

Evidence or artifact: ____________________
Status: [ ] not started  [ ] working  [ ] verified  [ ] blocked

### 3. Detect conflicts before activation

Block personalization and automated publication when pricing, offer, proof or conversion paths conflict.

Evidence or artifact: ____________________
Status: [ ] not started  [ ] working  [ ] verified  [ ] blocked

### 4. Verify every public surface

Fetch the human page and machine endpoints after a change.

Evidence or artifact: ____________________
Status: [ ] not started  [ ] working  [ ] verified  [ ] blocked

## Source ledger

- [ ] OpenAI: publishers and developers FAQ: https://help.openai.com/en/articles/12627856-publishers-and-developers-faq
- [ ] Google Search Central: AI features and your website: https://developers.google.com/search/docs/appearance/ai-features
- [ ] Eli AI Visibility Index methodology: https://hireeli.io/ai-visibility-index/methodology

## Measurement boundary

Baseline date and exact context: ____________________
7-day observation: ____________________
14-day observation: ____________________
30-day observation: ____________________
Known limitations: ____________________

Keep technical eligibility, citations, recommendations, visits, leads and revenue as separate evidence. This worksheet does not guarantee an external ranking or commercial result.