X3 API
X3 API
*** LIVE ***·X3 API·Compliance infrastructure for transportation·49 CFR verified daily·Carrier data · Regulations · Grounded AI*** LIVE ***·X3 API·Compliance infrastructure for transportation·49 CFR verified daily·Carrier data · Regulations · Grounded AI
Fleet Safety Hub
Integrate the X3 compliance platform

Developer Console

Your operating surface for X3 API keys, metered usage, endpoint contracts, and fleet-data integrations.

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API keys

Keys are masked after issuance. Secret values are never returned by this console.

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Read documentation

Endpoint catalog

Current implemented surfaces. Authentication and billing requirements vary by endpoint.

GET/api/carrier?dot=Carrier data
GET/api/cfr?c=395.8Regulations
GET/api/search?q=Corpus
POST/api/askMetered AI
POST/api/specialistMetered AI
GET/v1/usageKey usage

Usage this month

Usage is pooled across every key on your account and resets on the 1st.

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Need more this month? Add usage

Add-ons are one-time, apply to the current month and are billed securely through Stripe. Regularly over? A bigger plan includes more usage for less — Growth includes $350, Scale $1,250.

Verify a key’s live usage

The key stays in this browser tab only and is sent directly to the usage endpoint.

Quickstart

Use a bearer token. Never place API keys in URLs or client-side production bundles.

curl https://x3api.com/v1/usage \
  -H "Authorization: Bearer $X3_API_KEY"

Plans & billing

Grounded X3 API access, billed monthly. Your keys move to your plan's included usage the moment checkout completes. Cancel anytime.

Integration posture

Shared fleet-data adapters are managed in the Fleet Safety hub.