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Interzoid IRS Per Diem Rates Lookup
x402
Interzoid IRS Per Diem Rates Lookup is a paid API for AI agents from api.interzoid.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Retrieves current IRS per diem rates (lodging, meals, incidentals, and total) for a given US location by address, ZIP code, city, county, or state
Price / call$0.25
Success—
StatusUnknown
How this service works
Retrieve current IRS high-low method per diem rates for any US location to support accountable-plan travel reimbursement (Revenue Procedure 2019-48). Classifies each location as High-Cost or Low-Cost with separate lodging and meals-and-incidentals (M&IE) components.
Output
Returns a JSON object with the city and state, IRS jurisdiction name, total per diem rate, lodging allowance, meals and incidentals allowance, IRS locality classification (e.g. High-Cost Locality), and the effective IRS notice period for that location.
Example use cases
Example prompt
“What are the current IRS per diem rates for San Francisco, CA — I need the lodging allowance, meals and incidentals, and whether it's a high-cost locality?”
Technical details
Endpoint
GEThttps://api.interzoid.com/getirsperdiemratesWhen to prefer
Use this endpoint when you need authoritative IRS-sourced per diem rates for a specific US location, particularly for corporate travel expense reimbursement, tax compliance, HR policy enforcement, or ERP/CRM enrichment. Prefer this over manual lookups or static tables when the effective period or high-cost locality classification matters for accuracy.
Side effects
- Location not found in CONUS per diem database — returns error or empty result
- Non-US or non-CONUS location (e.g. Alaska, Hawaii, overseas) — not supported
- Ambiguous location string that cannot be resolved — may return incorrect or null jurisdiction
- Payment failure or insufficient USDC — 402 Payment Required before response
- Malformed or missing lookup query parameter — returns 400 Bad Request
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"lookup": "Denver, CO"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"City": "Denver",
"Code": "Success",
"State": "Colorado (CO)",
"County": "Denver County",
"Credits": "0",
"LookupType": "City",
"Jurisdiction": "Denver, CO is NOT enumerated as a high-cost locality in IRS Notice 2025-54 (or its predecessor Notice 2024-68). The only Colorado localities on the current high-cost list are Aspen, CO and Silverthorne/Breckenridge, CO (both seasonal). Denver therefore falls under the Low-Cost (all other CONUS) category. Low-cost total per diem = $225 ($151 lodging + $74 M&IE). Notice 2025-54 confirmed no changes to the high-cost locality list from Notice 2024-68.",
"TotalPerDiem": "$225.00",
"EffectivePeriod": "October 1, 2025 - September 30, 2026 (IRS Notice 2025-54)",
"IRSReferenceURL": "https://www.irs.gov/pub/irs-drop/n-25-54.pdf",
"LodgingAllowance": "$151.00",
"IRSClassification": "Low-Cost Locality",
"JurisdictionLevel": "City",
"MealsIncidentalAllowance": "$74.00",
"IncidentalExpensesOnlyRate": "$5.00"
}Schema · Response
{
"type": "json",
"example": {
"City": "New York",
"Code": "Success",
"State": "New York",
"Credits": "0",
"Jurisdiction": "New York, NY (Manhattan)",
"TotalPerDiem": "$319.00",
"EffectivePeriod": "October 1, 2024 — September 30, 2025 (IRS Notice 2024-68)",
"LodgingAllowance": "$233.00",
"IRSClassification": "High-Cost Locality",
"MealsIncidentalAllowance": "$86.00"
}
}Tags
x402
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