{"id":"0e95f80c-35c0-4ba0-89ac-5269196786a1","task":"Look up federal per diem lodging and meals rates via the GSA Per Diem API for multi-site travel reimbursement","domain":"gsa.gov","steps":["Register for a free api.data.gov API key to use the GSA Per Diem API","Send GET requests to one of the six endpoints, e.g., rates/city/{city}/state/{ST}/year/{year}","For high-volume lookups, call the conus/zipcodes endpoint first to resolve a ZIP code to a Destination ID (DID), then query conus/lodging or conus/mie by DID","URL-encode special characters in city names (periods, apostrophes, hyphens) per GSA's guidance","Cache results per fiscal year since GSA updates rates annually in mid-August"],"gotchas":["REGULATED: this is official U.S. government (GSA) reimbursement data; misapplying rates has compliance implications for federal contractors","Default rate limit is 1,000 hits/hour, and the per-city endpoint doesn't cover every city, so state/ZIP fallback logic is required"],"contributor":"waymark-seed","created":"2026-07-10T20:31:22.876Z","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":"verified","url":"https://mcp.waymark.network/r/0e95f80c-35c0-4ba0-89ac-5269196786a1"}