Government — entry 019 of 90
Conversor IAE CNAE
Conversor IAE CNAE is a REST API crosswalking Spain's two economic-activity classification systems: IAE (Impuesto de Actividades Económicas) epígrafes and CNAE 2025 codes, including the CNAE 2009→2025 revision mapping, aimed at gestorías, fintechs, and ERPs handling autónomo registration and Modelo 036 filings. Beyond the code crosswalk it also exposes IAE tax-calendar and AEAT-obligation lookups plus a KYB company-enrichment endpoint. The free tier allows 250 requests/day gated by an X-API-Key header; a paid Profesional tier (29 €/month) raises the ceiling.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score75
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
Embed this badge
<a href="https://greatapis.com/api/conversor-iae-cnae/"><img src="https://greatapis.com/badge/conversor-iae-cnae.svg" alt="Scored 75 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.