Getting started
Open API and organization API keys
Authenticate integrations with Metter API keys: audiences, contacts, and newsletter metadata.
3 min read, updated Jul 2026
Growth and higher plans include Metter’s Open API. Create organization API keys in Settings → API, then call https://www.metter.pro/api/v1 with Authorization: Bearer mttr_live_…. Full reference: /docs/api.
What you can do
- Read audiences and paginated contacts
- Upsert contacts with write scope + consent attestation
- List newsletter metadata (no page HTML in the API response)
- Call Metter from any HTTP client or automation tool that supports Bearer tokens