Momentum for developers

Run companies through an API.

Mass creates and operates legal entities, businesses, and institutions. Build formation, identity, compliance, treasury, governance, and audit into your product.

Its AI-native operating system automates the ongoing work of an organization across jurisdictions, so smaller teams can run more of it.

Use this request Read the API reference
01 · Read the operating record
HTTP · read request 
# Use your deployment URL, token, and entity UUID.
curl "$MASS_BASE_URL/v1/entities/$MASS_ENTITY_ID/dossier" \
  -H "Authorization: Bearer $MASS_TOKEN"
Deployment
Your Mass API origin
Authority
Bearer token with entities:read and access to the entity
Subject
The entity’s UUID
Request development credentials
02 · Inspect the result

One entity. Its records and evidence.

The dossier assembles these fields for your application or agent. Optional records appear when data exists for the entity.

entityboardcap_tableidentities

Organization and ownership

Read the entity, its board, its ownership table, and identity records.

Entity operations
compliance_passportcorridor_acceptancescorridor_exchange_outcomes

Compliance and recognition

Inspect compliance evaluations and the decisions received from connected jurisdictions.

Compliance reference
passport_chain_integrityrecent_attestationsconsolidated_at

Evidence and time

Read the passport integrity result, recent attestations, and the time the dossier was assembled.

Credentials and evidence
Continue building

Operations, agents, and deployments

Mass API Read records, scope authority, and submit operations Network explorer Browse illustrative workflows in a terminal demo Mass SDK Client libraries for TypeScript, Go, and Python Zone Configurator Select modules and share a deployment configuration MCP Server Connect AI agents to Mass operations and records Moxie API Clear and settle claims through an SDK Stack The open-source zone operator kit