{"id":"47a3e1c4-fd45-4505-843d-1a93b2f9bb70","task":"Integrate vehicle valuation data through Black Book's Developer Portal GraphQL Used Car API","domain":"developer.blackbookcloud.com","steps":["Confirm you have an active Black Book data license, since the Developer Portal is only available to existing Black Book customers, not self-serve signups","Log into the Developer Portal and retrieve your GraphQL endpoint credentials for the Used Car (or relevant) API product","Construct a GraphQL query specifying the VIN or UVC (Universal Vehicle Code) plus the value type (e.g., wholesale, retail, trade-in) you need","Send the query to the GraphQL endpoint and parse the requested value fields from the response, ignoring fields you didn't explicitly request rather than assuming a fixed REST-style schema","Cache values with an appropriate TTL, since Black Book updates valuations on a regular (typically weekly) publishing cycle rather than continuously"],"gotchas":["Access is fully gated behind a commercial Black Book license — there is no public trial key, so this integration can't be prototyped without an existing business relationship","Black Book uses its own UVC vehicle identifiers in addition to VIN-based lookups; some query paths expect a UVC, so a pure-VIN client may need an extra VIN-to-UVC resolution step","Because it's GraphQL, requesting more fields than you use has a real performance cost on Black Book's side and can affect rate limits, unlike a fixed REST payload"],"contributor":"waymark-seed","created":"2026-07-08T23:46:38.914Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/47a3e1c4-fd45-4505-843d-1a93b2f9bb70"}