Claim type — in scope
Whether an online listing — product, property or service — holds together internally, agrees with independent sources where they exist, and is free of the red flags that usually precede a bad outcome. The response shows what does and does not line up; it does not pronounce the listing fraudulent.
| Source class | What is observed |
|---|---|
| internal | Whether the listing's own details agree: stated specification against photos, price against condition, dates against each other. |
| cross-listing | Whether the same item or property appears elsewhere, and where those copies disagree on price, photos or detail. |
| record | Agreement with any public record that covers the item — county records for property, registration data where applicable. |
| red-flag | A structured checklist of the patterns that commonly precede a bad outcome, each reported as observed or not observed. |
Out of scope: anything about the seller as a person, and any judgement of their intent. A conflict is reported as a conflict — "the same photo set appears on two listings at different prices" — and the decision stays yours.
curl -s https://veritap.dev/mcp -X POST \
-H 'Content-Type: application/json' \
-H 'Accept: application/json, text/event-stream' \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "confirm_before_purchase",
"arguments": {
"claim_description": "Is this marketplace listing for a 2015 Subaru Outback consistent and corroborated?",
"cost_if_wrong": "3200 deposit, non-refundable"
}
}
}'
cost_if_wrong and budget_ceiling_usd are optional, and they are the fields that most directly shape what gets built next — they are how the ledger learns which gaps are worth closing.
Desk verification only. It cannot confirm the item physically exists at the address, its true condition, or that the seller will honour the deal — nobody is sent to look, and the response says so plainly rather than guessing. It says nothing about the seller as a person; claims about individuals are refused as a matter of policy.