Activiti Open-Source BPM REST API
Activiti open-source BPMN 2.0 process engine REST API for developers and enterprises to deploy, execute, and manage business process workflows — enabling automated process instance creation, task management, deployment management, and process monitoring through Activiti's Java-based open-source BPM engine embedded in applications or deployed as a standalone service. Enables AI agents to manage process deployment for BPMN process definition deployment and version management automation, handle process instance management for process case creation and lifecycle automation, access task management for human task retrieval, assignment, and completion automation, retrieve process variable management for process variable read and update automation, manage history management for completed process and task history retrieval automation, handle form management for user task form data submission automation, access identity management for user and group assignment automation, retrieve decision table management for DMN decision table evaluation automation, manage signal and message events for BPMN event trigger automation, and integrate Activiti with Spring Boot, Keycloak, and enterprise systems for open-source BPM application automation.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Open-source BPM. Self-hosted. Basic auth or Keycloak. Self-hosted data residency. Process instance data.
⚡ Reliability
Best When
A Java/Spring development team wanting AI agents to manage BPMN process deployment, human task orchestration, and process monitoring through Activiti's open-source BPM engine embedded in enterprise applications.
Avoid When
JAVA DEPLOYMENT IS REQUIRED: Activiti is a Java-based BPM engine requiring Java application deployment; automated cloud-native assumption creates hosting_gap for teams without Java application infrastructure; automated must deploy Activiti in Java environment. PROCESS DEFINITION MUST BE DEPLOYED: Process instances require deployed BPMN process definitions; automated instant-process assumption creates no_definition_found for process creation without pre-deployed BPMN definition; automated must deploy BPMN before creating instances. COMMUNITY EDITION HAS LIMITED SUPPORT: Activiti Community Edition is community-supported with no commercial SLA; automated enterprise-support assumption creates unsupported_incident for production issues requiring SLA-backed support; automated should evaluate Alfresco Process Services (APS) for commercial support. ALFRESCO APS VS ACTIVITI COMMUNITY: Alfresco Process Services is the commercial enterprise version; automated feature-parity assumption creates feature_not_available for APS enterprise features (Elasticsearch history, advanced UI) not in Community; automated must distinguish Community vs APS feature sets.
Use Cases
- • Embedding BPMN process automation into Spring Boot applications for developer-focused BPM automation agents
- • Managing human task workflows with assignment and completion for process automation agents
- • Deploying and versioning BPMN process definitions for DevOps BPM automation agents
- • Retrieving process history and audit trails for compliance and reporting automation agents
Not For
- • No-code BPM without Java/Spring development (Activiti requires Java embedding or deployment; Kissflow and Creatio serve no-code BPM users)
- • Enterprise BPM with professional support SLA without subscription (Activiti Community is community-supported; Alfresco Process Services is the commercial version)
- • High-throughput event-driven orchestration (Activiti is BPMN process engine, not event streaming infrastructure)
Interface
Authentication
Activiti uses Basic Auth or OAuth2 (with Keycloak) for BPM REST API. REST API with JSON. Open-source project. Originally developed at Alfresco (Tom Baeyens, Joram Barrez). Community: GitHub. Commercial version: Alfresco Process Services (APS). Alfresco: San Mateo, CA (now Hyland Software acquisition). Used in: financial services, government, healthcare for process automation. 10M+ downloads. GitHub: Activiti/Activiti. Competes with Camunda, Flowable, and Bonitasoft for open-source BPMN.
Pricing
Open-source Apache 2.0. Free community edition. Alfresco/Hyland commercial APS version. 10M+ downloads.
Agent Metadata
Known Gotchas
- ⚠ PROCESS DEFINITION DEPLOYMENT IS REQUIRED FIRST: Activiti requires BPMN process definitions to be deployed before instances can be created; automated create-instance assumption creates definition_not_found for process instance creation without prior deployment; automated must deploy BPMN definitions via deployment API before creating instances
- ⚠ TASK CLAIM IS SEPARATE FROM COMPLETE: Activiti human tasks support claim (assignment) as a separate step from completion; automated unclaim-complete assumption creates task_not_assigned for task completion by users who haven't claimed it; automated must claim tasks before completing them
- ⚠ HISTORIC DATA REQUIRES HISTORY API: Completed processes and tasks are moved to history; automated active-query assumption creates process_not_found for completed processes queried via runtime API instead of history API; automated must query history API for completed process data
- ⚠ PROCESS VARIABLES HAVE TYPES: Activiti process variables have explicit types (string, integer, boolean, json); automated untyped assumption creates type_mismatch for variable setting without correct type specification; automated must specify variable type when setting process variables
- ⚠ ACTIVITI 6 VS 7 API DIFFERENCES: Activiti 6 (stable) and Activiti 7 (cloud-native) have different API structures; automated version-agnostic assumption creates endpoint_not_found for Activiti 6 endpoints called against Activiti 7 Cloud deployment; automated must target correct API version for deployment
Alternatives
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Scores are editorial opinions as of 2026-03-07.