Emissary — API-First Fiscal Infrastructure

Build fiscal capabilities into your software

Emissary is B2B infrastructure for software teams, integrators, ERP systems, and SaaS platforms. Its environment-scoped API provides customer records, invoice drafts and issuance, fiscal operation tracking, documents, and signed webhooks.

Issuance is not external fiscal acceptance

An invoice can be issued and persisted before its fiscal provider operation is accepted. Read invoice issuance state and provider outcome as separate facts.

• Understand the platform boundary
• Start with the API
• Explore executable SDK examples

Technical maturity

Spain is the first implemented fiscal jurisdiction. Its VERI*FACTU record flow has simulator validation and an owner-confirmed accepted ExternalTest submission. Production is not validated and remains disabled. Other jurisdictions below are evaluation candidates, not available connectors.

Connector	Jurisdiction	Status	Implemented capabilities	Validation notes
Spain — AEAT VERI*FACTU	ES	Ready	VERI*FACTU registration, hash chain, QR verification, ExternalTest SOAP submission	Owner-confirmed result; durable response evidence is not included in this repository