Most travel management companies still source ground transportation the way they did in 2010: an RFP per market, a spreadsheet of preferred suppliers, and a phone call when a client lands somewhere new. That process made sense when there was no alternative. It stopped making sense when ground transport became API-addressable.
A TMC adding chauffeured ground supply today has three paths: contract operators directly in each market, resell an aggregator’s inventory, or connect to an operator network through a ground transportation API and keep the supplier relationship. Each path trades off control, transparency, and time-to-coverage differently — and the differences land squarely on the thing TMCs care about most: duty of care.
Path One: Contract Operators Directly
This is the path most TMC ground programs were built on, and it has real strengths. You know exactly who performs every trip. You negotiate rates directly. The relationship is yours.
The cost is that it doesn’t scale. Every new market means:
- A new supplier search and RFP cycle — often measured in weeks
- Credential collection by email: certificate of insurance, operating license, airport permits
- Re-verification when documents expire — or, more often, credential drift nobody catches
- A new booking process, because no two operators run the same systems
A single operator rarely covers all the markets a corporate program touches. Direct contracting works for your top ten cities. It quietly fails everywhere else — which is usually where the risk lives.
Path Two: Resell an Aggregator
Aggregators solve the coverage problem fast: one commercial agreement, instant inventory in hundreds of cities. For low-touch transfer volume, that convenience is real.
What you give up is visibility. On an aggregated trip you often cannot name the company performing the ride, cannot verify its credentials, and cannot reach it directly when something goes wrong. The margin structure is opaque — the spread between what your client pays and what the operator receives belongs to the middle layer.
For a TMC, that opacity is not an abstract concern. If anything goes wrong on the ground, you own it — and “we booked it through a platform” is not a duty-of-care answer your client’s travel risk team will accept.
Path Three: Connect Through a Ground Transportation API
The third path is newer: connect once to a network of independent operators, and keep the supplier relationship direct. A network is not an aggregator. It doesn’t sit between you and the operator commercially — it provides the connectivity and the verification layer, and you choose which operators to work with.
In practice that means:
- One integration, many markets. A single API connection reaches every operator on the network, instead of one integration (or manual process) per supplier.
- Verification is done once, centrally. Insurance, operating licenses, and airport permits are collected and kept on file at the network level, with expiry tracking — instead of being re-collected by every buyer over email.
- The performing operator is always named. You know who is driving before the trip runs, and you can hold a direct relationship with them.
- Your existing suppliers come with you. If your preferred operators are on the network, you connect to them through the same pipe — this is an addition to a ground program, not a replacement for it.
The honest trade-off: a network still asks you to choose and manage partners. It shortens the work of finding, vetting, and connecting to operators — it does not make those decisions for you, and it does not generate the bookings. The demand is yours; the network is the rail it runs on.
How the GNet Platform Works for a TMC
GNet is the B2B marketplace for ground transportation — roughly 6,000 verified operators across 90+ countries, connected through one API. For a TMC, the flow looks like this:
- Create an account at connect.grdd.net and receive API credentials.
- Find and vet operators in GNet Connect — verified profiles with certificates of insurance, operating licenses, and airport permits on file, and expiry tracking so lapsed documents get flagged.
- Establish partnerships with the operators you choose. Partnerships come first; no trip moves without one.
- Send trips through the API — a REST/JSON integration for booking, quotes, and cancellations, with status updates pushed back to you through the whole reservation lifecycle.
- Track every trip live. Driver location and ETA stream in real time, with a white-label tracking link you can pass straight to the traveler or the travel manager.
Fares come back itemized — base rate, tolls, extras — so what you bill the corporate client is auditable rather than bundled. And GNet does not process payments or sit in settlement: commercial terms stay bilateral between you and the operator, which is exactly where a TMC wants them.
Commercially, there’s no setup fee and no subscription required — pricing is a volume-based per-transaction model. Integration documentation and a sandbox are available at docs.grdd.dev.
FAQs About Ground Transportation APIs for TMCs
What is a ground transportation API?
Does connecting to a network replace our preferred suppliers?
How are operators vetted?
Who performs the trip?
What does it cost?
How long does integration take?
Sourcing ground transportation for corporate travelers?
GNet gives TMCs one connection to roughly 6,000 verified operators across 90+ countries — credentials on file, live trip tracking, and itemized fares.
Technical teams can start with the GNet Platform quick-start guide.