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Wrap the GSA Per Diem API in Claude so a federal-contractor pricer can collapse 1 hour of manual per-diem lookups…
Wrap the GSA Per Diem API in Claude so a federal-contractor pricer can collapse 1 hour of manual per-diem lookups into 5 minutes when building a proposal travel ODC line.
Ships as one download · travel-cost-estimator.zip · 11 files
A redacted example of what this tool produces — so you can judge the quality before you buy.
Redacted, illustrative example. Names, agencies, and figures are fictional placeholders.
This is what Claude returns when you ask the estimate_travel_rollup / estimate_trip_cost
tools to build a proposal travel ODC line. The MCP wraps the FREE GSA Per Diem API v2
(https://api.gsa.gov/travel/perdiem/v2/rates/) — a free api.data.gov key, no paid data
source — and applies the FTR first/last-day 75% M&IE rule for you. CONUS only; for
HI/AK/OCONUS the tool returns a DoD DTMO pointer. Output is an unburdened ESTIMATE for
draft pricing; G&A and other indirects are applied downstream in your pricing model.
"Roll up travel for 3 trips, 2 travelers each, for the NOAA Boulder data-center support proposal: Boulder CO Apr 13–17 2026, Norfolk VA May 4–8 2026, and Kansas City MO Jun 8–12 2026. Airfare $480/person, ground $70/person each trip."
estimate_trip_cost, example: Trip 1)Boulder, CO — 2026-04-13 to 2026-04-17 (5 days / 4 nights), 2 travelers
Rate basis: FY2026 GSA Per Diem (Boulder, CO) — non-standard area
Per-diem citation: Boulder, CO FY2026: M&IE $80, Lodging $182/night (Apr)
| Cost element | FTR rule | Per traveler |
|---|---|---|
| M&IE — first day | 75% of $80 | $60.00 |
| M&IE — middle days (×3 @ 100%) |
Delivery · Download
Download the zip, install the Python dependencies from requirements.txt, then register server.py as an MCP server in your Claude client. The README walks through the config block.
HIGH-TRUST discipline. Where this tool produces pricing, compliance, or past-performance artifacts, FAR/DFARS guardrails and "FOR INTERNAL ESTIMATE USE — NOT A PROPOSAL PRICE" disclaimers are embedded in the output. It does not replace a qualified pricer, counsel, or color-team review.
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Autonomously execute capture-stage Price-to-Win (PTW) analysis against a pasted competitor list (3-7 named) +…
Generates a DCAA-defensible Basis of Estimate narrative, an LCAT-by-LCAT rationale table, and a gap report from a…
| full $80 |
| $240.00 |
| M&IE — last day | 75% of $80 | $60.00 |
| M&IE subtotal | $360.00 |
| Lodging (4 nights × $182 cap) | nightly cap | $728.00 |
| Airfare (round-trip) | as entered | $480.00 |
| Ground transport | as entered | $70.00 |
| Misc | as entered | $0.00 |
| Per-traveler total | $1,638.00 |
| Trip total (× 2 travelers) | $3,276.00 |
estimate_travel_rollup)status: success · trips: 3 · traveler-days: 30 · grand total: $9,936.00
| Trip | City | Dates | Days | Travelers | Lodging cap/night (month) | Trip total |
|---|---|---|---|---|---|---|
| 1 | Boulder, CO | 2026-04-13 → 04-17 | 5 | 2 | $182 (Apr) | $3,276.00 |
| 2 | Norfolk, VA | 2026-05-04 → 05-08 | 5 | 2 | $144 (May) | $2,972.00 |
| 3 | Kansas City, MO | 2026-06-08 → 06-12 | 5 | 2 | $152 (Jun) | $3,028.00 |
| Category | Total |
|---|---|
| M&IE | $2,160.00 |
| Lodging | $4,256.00 |
| Airfare | $2,880.00 |
| Ground transport | $420.00 |
| Misc | $0.00 |
| Grand total | $9,936.00 |
If a city is not on GSA's non-standard area list, the tool returns the Standard CONUS rate and flags it:
estimate_trip_cost("Smallville", "KS", ...) →
rate_tier: "standard-conus"
note: "Smallville, KS not on GSA non-standard area list — Standard CONUS applied
(M&IE $68, Lodging $110/night). Verify at gsa.gov before submission."
estimate_trip_cost("Norfolk", "VA", "2026-09-29", "2026-10-03", ...) →
fy_boundary_note: "Trip crosses fiscal-year boundary (Oct 1). Rates split between
FY2026 and FY2027."
rate_basis: "FY2026-FY2027 GSA Per Diem (Norfolk, VA) — trip spans FY boundary"
per_diem_citations)https://api.gsa.gov/travel/perdiem/v2/rates/ (GSA Per Diem API v2, free key)Estimates only. Per-diem lodging is a CAP, not a flat reimbursement (actuals
limited to lodging cost paid + lodging tax). Rates change October 1 each fiscal year.
CONUS only — for HI/AK/OCONUS use DoD DTMO. Conference-lodging exceptions
(FTR 301-74.7) and provided-meal deductions are not modeled. Travel-related indirect
costs (G&A) are not applied here — drop the output into your proposal-pricing model for
indirect loading. Verify current rates at
https://www.gsa.gov/travel/plan-book/per-diem-rates before submission. Not DCAA-approved;
not audit-ready.
Illustrative sample, not a real engagement.