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NexumAPI Docs

Changelog⁠

July 2026⁠

  • Add support for explicit nil values in NexumAPI request fields
  • Add granular MCP policy controls for allowed identities, Syms, services, operations, and credentials
  • Apply policy-based write gating to MCP tools
  • Fix MCP ProcessorUser credential handling and operation discovery
  • Fix MCP TokenCredentials handling for logoff operations
  • Fix dispatch gaps in MCP operation wrappers
  • Fix serialization of SymXchange response extensions in MCP results

June 2026⁠

  • Fix MCP credential handling and Windows runtime imports

  • Fix OpenAPI documentation generation on Windows

  • Follow redirects when making SymXchange requests

  • Added a protected MCP server at /mcp/ for agent-based NaaS and SymXchange workflows

  • Added MCP discovery tools for capabilities, configured Syms, SymXchange services, record types, and compact operation schemas

  • Added MCP read tools for getting, listing, and searching SymXchange records

  • Added MCP FindBy support for global account searches such as last-name, SSN, MICR, and other findBy* operations

  • Added MCP PowerOn execution support, including standard and MCW PowerOn operations when write tools are enabled

  • Added MCP transaction workflows for posting, reversing, and transaction lookups when enabled for the deployment

  • Added MCP domain tools for user management, ECAA authentication, file upload/download, batch jobs, balancing, credit reports, and cash-machine operations

  • Added MCP NaaS utility tools for health, keep-alive, host configs, connection status, and supported services

  • Added optional MCP write tools for create, update, and delete record workflows when explicitly enabled

  • Added SymXchange credential forwarding for MCP via X-NaaS-SymX-Credentials

  • Added configurable MCP enablement and write gating through NaaS configuration

December 2025⁠

  • Added WSDL caching and SymXchange type generation
  • Added generated types for all SymXchange 2022.01 services
  • Added generated types for SymXchange 2018.01 through 2021.01 services
  • Added generated types for persistent SymXchange endpoints
  • Added typed OpenAPI response models for utility endpoints
  • Added dynamic type registry support with service discovery

August 2025⁠

  • Improved logging and request diagnostics
  • Tuned health check thresholds and ALB health behavior

July 2025⁠

  • Added the main API key requirement
  • Added passthrough request tests and message ID logging
  • Added passthrough authentication fixes
  • Fixed protocol selection for passthrough routes
  • Improved preflight request handling and logging

June 2025⁠

  • Added retry logic for initialization and service calls
  • Added unique instance ID checks during startup

May 2025⁠

  • Added recurring health check jobs
  • Updated health check behavior
  • Added runtime identifiers to logs for better traceability

March 2025⁠

  • Added Fargate execution support for NaaS
  • Added container health checks and request-count based autoscaling
  • Added support for running warmers across execution types

December 2024⁠

  • Added retries for SOAP client creation
  • Added a default timeout for SOAP client creation
  • Added a custom logger with trace-level logging
  • Improved stack trace logging for uncaught exceptions
  • Reduced SOAP client creation log noise

August 2024⁠

  • Switched to REST API Gateway
  • Added custom HTTP client timeout support
  • Added SymXchange connection status checks
  • Improved invoke and passthrough error messaging
  • Added API key generation image support

July 2024⁠

  • Added supported-services route
  • Added self-hosted image generation for multiple architectures
  • Added logging for passthrough requests
  • Added default tenant identifier handling for passthrough routes
  • Added support for switching SymXchange calls to HTTP where required
  • Patched SOAP parsing for SymXchange Version_ elements
  • Improved traceback and error logging

June 2024⁠

  • Rebuilt NaaS on the Python/FastAPI runtime
  • Added direct SymXchange connection support
  • Added async request handling
  • Added case-insensitive routes
  • Added correlation IDs, timing middleware, and structured error handlers
  • Added CORS headers to SymXchange responses
  • Added passthrough routes
  • Added Form URLEncoded request support
  • Added custom field support
  • Added /health endpoint for NaaS status
  • Added auth to passthrough routes
  • Added support for /persistent SymX services
  • Fixed dynamic namespacing for recursive child elements
  • Improved Datadog logging and health invocation handling

March 2024⁠

  • Added support for Dynamic Custom Logging fields
  • Updated default response formatting

February 2024⁠

  • Added more performance improvements
  • Improved graceful logging behavior

January 2024⁠

  • Added major performance improvements
  • Added asymmetric API key verification
  • Added request ID logging on errors

October 2023⁠

  • Added Form URLEncoded content-type support to NaaS
  • Added support for nested fields in Form URLEncoded requests
  • Added SymXchange native passthrough mode to capture external vendor logs