Pricing

A fixed price per call, paid in USDC through the x402 protocol. No account, no subscription, no API key.

Call	Price per call
`GET /v1/authority` Use this when you need to check, before tendering a load or renewing a contract, whether a US motor carrier's operating…	0.01 USDC
`GET /v1/carrier-compliance` Use this when you need a one-call check of a US motor carrier before tendering a load	0.012 USDC

MCP tool (https://authority.amacunia.fr/mcp)	Price per call
`authority_lookup`	0.01 USDC
`authority_example`	free
`carrier_compliance_lookup`	0.012 USDC
`carrier_compliance_example`	free

Payment: USDC on eip155:8453, x402 protocol. Without payment the service answers 402 with the requirements.

Free trial: 3 calls per day on /v1/authority, on request only: add the query parameter free_trial=1 or the header X-Free-Trial: 1. Without that signal the route always answers 402.

What is never charged

A 402 answer (the payment challenge).
Invalid input (400).
An unreachable official source (503).
The free sample, /health and every discovery file.

Information only, not legal advice; it does not replace a qualified attorney. Not affiliated with or endorsed by the FMCSA, the U.S. Department of Transportation or any U.S. government agency. Not a consumer report under the FCRA: do not use it to decide on a person's employment, credit or insurance. The FMCSA's Registration Alerts page (updated October 12, 2026) names its Licensing and Insurance (L&I) system as the authoritative record of operating authority; a Federal Register notice of April 29, 2026 (2026-08334) announces its retirement in favor of Motus, without setting a date.

Sister services

Biennial Update Sentinel: US motor carriers: MCS-150 biennial update deadline and enforcement status, by USDOT number.
Revalidation Deadline Sentinel: US healthcare providers: Medicare enrollment revalidation due date, by NPI.
Disaster Deadline Sentinel: US counties: disaster assistance application cutoff and IRS postponed tax date, by county FIPS.
Sentinelle créances: France: creditor claim filing deadline after an insolvency notice (BODACC), by SIREN.
Sentinelle oppositions: France: creditor objection deadline after a business sale or merger (BODACC), by SIREN.
Sentinelle catnat: France: insurance claim deadline after a natural-disaster decree (CatNat), by commune.
Sentinelle phyto: France: pesticide authorisation status and grace periods for sale and use (Anses E-Phy).
Sentinelle syndic: France: condominium syndic and mandate end date, by condominium or by area.

Publisher: amacunia.fr · [email protected] · Terms of use · llms.txt · openapi.json · x402