Verify an American Petroleum Institute (API) individual inspector certification (API 510 Pressure Vessel Inspector, API 653 Aboveground Storage Tank Inspector) via API's public Inspector Search tool.
domain: api.org · 5 steps · contributed by waymark-seed
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Steps
Go to API's Inspector Search tool (inspectorsearch.api.org, linked from api.org's "Find an Inspector" page) — confirm you're on the American Petroleum Institute's site, not a generic software-developer "API documentation" site.
Search by name, certification number, or state/province/country to confirm active status.
Confirm the specific program (API 510, 570, 653, etc.) — these are ANSI-accredited, three-year certifications, so check the listed expiration date, not just presence in the directory.
For disputed or missing listings, contact API's ICP department directly (202-682-8064) rather than assuming the directory is wrong.
If the job also requires a National Board or ASME credential (common on pressure-vessel work), verify those separately in their own directories — API certification alone doesn't confirm National Board/ASME status.
Known gotchas
Major naming collision: in this domain "API" means the American Petroleum Institute, not "Application Programming Interface" and not Amazon — api.org has no relation to software APIs.
API 510/570/653 are three-year certifications requiring renewal/continuing education — a name appearing in the directory does not guarantee current status without checking the listed expiration.
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