Documentation

Everything you need to verify — and prove it.

Send addresses in, get signed results back. API reference, integrations, and receipt verification — all in one place. Something missing? Tell us.

For developers

A real REST API, fully specced.

Bearer keys, scopes, idempotency, cursor pagination and signed receipts — with an OpenAPI spec and a ready-to-import Postman collection so you can call every endpoint in minutes.

API reference Postman collection

API reference Endpoints, auth, request + response shapes. OpenAPI spec openapi.yaml — generate a client in any language. Postman Import the collection and start firing calls.

Send your first address

Quickstart

API reference POST /v1/validate + POST /v1/batch. Webhooks Job completion + reputation events. Verifying receipts Ed25519 + JWKS in 20 lines. CSV upload format Column headers, encoding, size limits.

Wire it into your stack

Integrations

Zapier One-click sync from HubSpot, Attio, Notion. Make (formerly Integromat) Multi-step automations. Postman collection Import the collection and try every endpoint.

Run it in production

Operations

Rate limits What you get on each tier. Idempotency keys Safe retries without double-charging. Error codes Every code the API can return. Status page Historical uptime + current incidents.