Two dispatchers at a bright brokerage desk, one pointing at a screen showing a load board and an X3 carrier verdict marked Approved, a truck yard through the window
X3 APICompliance Infrastructure for Transportation

Build Compliance
Into Anything.

One key connects your TMS, ELD, fleet platform, brokerage or insurance system to the decision engines behind every X3 Fleet Safety product. Raw data tells your software what happened. X3 tells it what that means and what to do next — grounded in verbatim 49 CFR, a 300,000+ record corpus and live USDOT data, with the citation attached.

300,000+ grounded records· 200+ compliance agents· 49 CFR verbatim· Live carrier data· Cited decisions
API calls being served right now
The integration problem

Your Platform Has the Data. It Doesn’t Have the Judgment.

A TMS knows the load, the driver and the truck. An ELD knows the hours. A brokerage knows the DOT number. None of them know whether the carrier should be tendered, whether the log is a violation, whether the driver is qualified for this trip, or what 49 CFR actually says about it — and building a regulation team into a software product is a multi-year detour. So the platform shows the data and leaves the judgment to whoever is looking at the screen.

Every compliance product X3 ships runs on one engine. The API opens that engine to yours.

A dispatcher at his desk staring at a load board, phone in hand, a DOT number on a sticky note on the monitor, trailers at the dock outside
X3 Intelligence

Send Data. Get a Decision.

Every X3 capability sits behind one key. Each engine returns a structured, cited decision your software can act on — not a page of search results, not an uncited paragraph.

Verified law

The regulation, verbatim and cited. Query the exact controlling text of 49 CFR, refreshed as the eCFR changes — no hallucinated rules, no stale citations.

Grounded agents

200+ compliance agents, the same specialists that power X3 HazMat, CSA, HOS, DataQ and Drug & Alcohol, each scoped to a real compliance job and grounded in the corpus.

Live carrier data

A carrier’s authority, safety-rating factors and inspection signals by USDOT in one call — for TMS, insurers, brokers and factoring platforms.

Structured decisions

Clear / Review / Hold, Preventable / Not preventable, cleared / not cleared — with the reasons, the rule and a confidence your product can render.

One key. Every X3 product.

X3 API: a black laptop on a black surface, its keyboard and screen lit only in cyan
Try it live

One Call. A Cited Carrier Decision.

This is the live Carrier Intelligence engine — the same call behind X3 CarrierCheck. A sample response the way your software receives it, then the real endpoint you can hit right now.

x3api.com/api/carrier?dot=1234567 · Carrier Intelligence
GET /api/carrier?dot=1234567 → 200 OK · ACME TRUCKING LLCSample
Illustrative response · live responses carry the same fields
Active
usdot_status
High
risk.risk_score
71
risk.iss_value
true
grounded
What comes back — structured, cited, actionable
  • vetting.authority_active: true · chameleon_links: [] — authority confirmed, no fraud-network links found
  • basics.unsafe_driving.percentile_pct: 86.5 · alert: true — the BASIC that drives the risk score
  • qualification: "Review" — the verdict your product renders, with the reasons array attached
  • Every field grounded in FMCSA data and the X3 corpus, cited to the section it came from
Try it live — the same Carrier Intelligence call behind X3 CarrierCheck
Decision support — cited, regulation-grounded information from published sources. Not legal advice, not affiliated with FMCSA or USDOT. Verify against the current controlling regulation.
An underwriter at a bright city office reading a printed insurance policy beside a screen showing a fleet safety and risk overview
Twenty products. One integration.

Every X3 Product Runs on This Engine.
Now So Can Yours.

X3 CSA, DataQ, MVR, HOS, HazMat, CarrierCheck, Legal, Permits, Clean Truck and the rest of the twenty are not separate systems — they are twenty front doors on one engine. The API is that engine, opened to your software. Integrate once, and every answer a fleet can get on an X3 screen, your TMS, ELD, brokerage or insurance platform can get in a response, cited to the regulation. Carrier and Regulation Intelligence are live today; the rest switch on under the same key as each product is production-hardened.

Twenty products. One integration.

Live

Can we tender to this carrier?

Behind it: X3 CarrierCheck, X3 CSA, X3 Insurability. Send a DOT#, get authority, the 7 BASICs, a risk score, fraud signals and a Clear / Review / Hold verdict.
Live

What does the regulation actually say?

Behind it: Ask X3 and the 300,000-record corpus. Ask a real DOT question, get the applicable sections, exceptions, risk flags and citations verified against the eCFR.
Rolling out

Is this driver legal for this load?

Behind it: X3 Workforce, X3 MVR, X3 Drug & Alcohol, X3 Background. Send a driver profile, get a §391 eligibility call and the DQ-file gaps.
Rolling out

Is this log a violation?

Behind it: X3 HOS. Send log data, get §395 violations, the 11/14/60-70 status and the corrective action.
Rolling out

Can this truck take this route?

Behind it: X3 Permits, X3 HazMat, X3 Clean Truck. Send vehicle, route and cargo, get cleared / not cleared with the credentials and permits required.
Rolling out

Was this crash preventable?

Behind it: X3 Preventability, X3 DataQ. Send the event, get Preventable / Not preventable under the ATA/NSC standard, the factors and the challenge packet.
Rolling out

Does this document meet the CFR?

Behind it: X3 Verify, X3 SOP, X3 Legal. Upload a policy, SOP or driver file, get it classified, checked against the rule and marked up.
Rolling out

Is this fleet audit-ready?

Behind it: X3 DOT Audit, X3 New Entrant. Send the fleet record, get readiness, the gaps ranked and the export an auditor accepts.
How it works

Live in an Afternoon.

Simple REST and JSON. Search the CFR, ask an agent, pull a carrier by USDOT — and meter by call as you grow.

01

Get a key

Request a sandbox key and pick a plan later. Free dev tier to start, no card.

02

Call the endpoint

GET /api/carrier?dot=… for a carrier. GET /api/search?q=… for the rulebook. POST /api/specialist for an agent.

03

Read the decision

Structured JSON with the verdict, the reasons, the citation and a confidence — render it, gate on it, log it.

04

Ship it

Embed cited compliance intelligence in your product. Webhooks when something changes; a spend cap on every key.

Get a key. Call the endpoint. Ship it.

A developer at a bright desk, one screen showing a JSON response, the other the API documentation, coffee and a notebook
Monitoring & freshness

Watch. Don’t Poll.

The corpus refreshes as the eCFR changes and carrier data updates as FMCSA publishes. Subscribe to a carrier, driver or permit and X3 sends a webhook when something material changes — priced per monitored entity, so you never hammer the API to find out.

300k+
Grounded records
200+
Compliance agents
<1s
Typical CFR & corpus call
0
Uncited answers
A developer’s hand on a cyan-lit keyboard beneath a dark screen streaming carrier-changed and delivered webhook events
Refresh

Verbatim 49 CFR refreshed as the eCFR changes; carrier data as FMCSA publishes.

Subscribe

A carrier, a driver, a permit — one entity, one line item.

Notify

A webhook with the change and the citation, not a diff you have to interpret.

Cap

A hard monthly spend cap on every key, with 50 / 75 / 90% alerts.

Your product shouldn’t find out about a revoked authority from the customer. The webhook tells it first.

Command center

Every X3 Compliance Domain. Behind One Key.

The 200+ grounded agents are organized into the same specialist crews that power each X3 Fleet Safety product. Call any of them by name over verbatim 49 CFR and live carrier data.

Two engineers in front of a wall display showing live API traffic, a US carrier map and a citations feed, a city skyline through the window
Every tool that ships
CSA / SMS agents — the seven BASICs, inspections, percentiles
Hours of Service agents — §395, ELD edge cases, log validation
HazMat agents — classification, placarding, shipping papers (Parts 171–180)
Drug & Alcohol agents — Part 40 and 382, pools, Clearinghouse
Driver Qualification agents — MVRs, DQ files, §391
Permits / IFTA agents — authority, IRP, IFTA by jurisdiction
Audit / New Entrant agents — the six factors, checklists
DataQ agents — whether an inspection is worth challenging
Carrier Intelligence — authority, risk, fraud signals
Regulation Intelligence — the rulebook, cited
Data
Lookups: carrier, CFR section, corpus record.
Decision
A verdict with reasons, citation and confidence.
Deep analysis
Documents and multi-step agent work, by workload.
Monitoring
Webhooks on material change, per entity.

Not for fleets. For the software fleets use.

Bright open-plan office of a logistics software company, teams at desks with route maps on screen, a yard of trucks through the glass wall
Who builds on X3 API

Not for Fleets. For the Software Fleets Use.

TMS and ELD platforms adding cited HOS and compliance answers inside dispatch. Insurers and MGAs pulling carrier safety factors by USDOT. Brokers and shippers vetting authority and catching fraud signals at onboarding. Factoring and fintech scoring carrier reliability inside credit flows. Consultants and internal teams grounding their own copilots in a source they can trust.

A laptop on a sunlit desk showing a carrier review marked Clear, a phone beside it lit with the alert that the carrier’s status changed
The outcome

Your Product Ships With Compliance Judgment Built In.

The same engine behind every X3 Fleet Safety product, inside yours — cited answers your users can trust, decisions your workflows can gate on, and a bill that never surprises you.

Integrate once.

One key reaches every engine; turn capabilities on as you grow.

Cite everything.

Every answer tied to the section it came from.

Never overspend.

A hard cap per key, alerts on the way up, no charge for failures.

Start Building Free Ask the Rulebook
The products that run on this engine
Pricing

Pay Only for What X3 Does.

A platform fee plus metered usage. Start free, build in the sandbox, go live when you’re ready — and every paid plan reaches the whole catalog.

Sandbox
Free
No credit card. All API schemas, test data plus a small live allowance, one key.
  • All endpoints, sandbox data
  • Small live allowance
  • 1 key
Start Free
Starter · most popular
$99/mo
$100 of usage included. Production access to every engine, standard limits.
  • Every engine in the catalog
  • 3 keys · webhooks
  • Standard rate limits
Choose Starter
Growth
$299/mo
$350 of usage included. Lower usage rates, batch and monitoring.
  • 10 keys · batch · monitoring
  • Lower usage rates
  • Analytics · priority support
Choose Growth
Scale
$999/mo
$1,250 of usage included. Lowest usage rates, bulk operations, SLA.
  • 25 keys · bulk ops · SLA
  • Lowest usage rates
  • Priority processing
Choose Scale
Usage, in plain dollars
Data lookup$0.01
Compliance decision$0.10
Deep AI / document analysisby workload
Monitoringper entity / mo
Third-party data (MVR, background, Clearinghouse)at cost
Starting numbers — finalized from live cost telemetry before launch. Included usage is a monthly allowance, not credits to track. A hard monthly spend cap on every key with 50 / 75 / 90% alerts; you never pay for failed requests or X3-side retries. Annual plans save about two months.
Enterprise
Custom
Negotiated volume rates, redistribution and white-label rights, SSO, SLA, DPA and dedicated support.
Talk to Us
Every paid plan reaches the whole catalog — you don’t buy a new plan per capability. Prices in USD.

Decision support, not legal advice. X3 API returns cited, regulation-grounded information from published sources. It is not legal advice and is not affiliated with FMCSA or USDOT. Verify against the current controlling regulation.

FAQ

Frequently Asked Questions.

What platform teams ask before they put X3 API behind their product.

A terminal window on a dark screen: a curl request for a DOT number returning JSON with the verdict Compliant and the citation 49 CFR 390.21
Is this the same engine behind the X3 products?
Yes. X3 HazMat, CSA, HOS, DataQ, CarrierCheck and the rest all call this engine. X3 API opens it to your product.
How is it grounded?
Answers are tied to the verified, current CFR text and a 300,000+ record corpus, with citations. It’s decision support — always verify against the controlling regulation.
What can I pull on a carrier?
Authority status, safety-rating factors, the seven BASICs, crash and inspection signals and fraud-network indicators by USDOT number — the inputs behind X3’s carrier vetting.
Which engines are live today?
Carrier Intelligence and Regulation Intelligence. HOS, Driver Qualification, Permit & Trip, Crash, Document and Monitoring roll out on the same key as they are production-hardened.
What are the rate limits and latency?
The free developer tier includes a small live allowance at standard limits; paid plans raise the ceiling and add higher limits and SLAs. Most CFR and corpus calls return in well under a second; live carrier pulls depend on the upstream source.
How does billing work?
A platform fee plus metered usage: data lookups at $0.01, compliance decisions at $0.10, deep analysis by workload, monitoring per entity. Included usage is a monthly allowance, every key has a hard spend cap with alerts, and you never pay for failed requests. These are starting numbers, finalized before launch.
How do you handle security and data?
Keys are scoped per project and calls are served over HTTPS. Enterprise plans add a security review, a DPA and volume terms. We don’t sell your query data.
How do I get started?
Email for a free sandbox key and start calling the endpoints today — the developer quickstart has the first call ready to paste.
One key. Every engine.

Build Compliance Into Anything.

Get a sandbox key, make the first call from the quickstart, and ship cited compliance intelligence inside your product this week.