MEF
MEF — rebranded as Mplify Alliance on 24 June 2025 — is a US-headquartered nonprofit industry alliance of network, cloud, cybersecurity and enterprise organizations that defines the standards behind Carrier Ethernet, SD-WAN, SASE and Network-as-a-Service, and that publishes the LSO (Lifecycle Service Orchestration) API suite used by carriers to automate wholesale and inter-provider business and operational transactions. MEF sits on the wireline/standards side of the telecom value chain: it does not operate a network and sells no connectivity, it produces specifications, SDKs, an interop test service and the MEF 3.0 LSO API Certification Program that service providers and their software vendors implement. Its API posture is unusually open for this sector — the LSO Cantata, Sonata, Allegro, Interlude, Legato and Presto SDKs are published as Apache-2.0 OpenAPI documents in the public MEF-GIT GitHub organization, and lso.mplify.net is a genuine, no-login developer portal with an API catalog, payload catalog, an API blending tool and SDK release downloads. The membership wall sits one layer in, not around the specs: the per-API Developer Guides on GitHub and the test-requirements documents on the Mplify wiki are member-only, while the machine-readable API definitions themselves are free to anyone. On network APIs MEF is a GSMA Open Gateway MOU signatory (announced 11 November 2025, alongside the GSMA, the Linux Foundation and TM Forum) and ships a pre-standard LSO Quality on Demand payload schema explicitly aligned to the CAMARA QoD API — it complements CAMARA on the wireline side rather than exposing CAMARA endpoints itself, because it has no network to expose.
MEF publishes 95 APIs on the APIs.io network, including LSO Interlude MEF 133.1 streaming template, LSO Legato Legato Service Catalog API, LSO Legato Legato Service Catalog Notification API, and 92 more. Tagged areas include Telecommunications, United States, Standards, LSO, and Network APIs.
The MEF catalog on APIs.io includes 2 event-driven AsyncAPI specifications.
MEF’s developer surface includes documentation, SDKs, tooling, getting-started guide, support, authentication, changelog, and 45 more developer resources.
Kin Score
APIs 95
Individual APIs this provider publishes, each with its own machine-readable definition.
MEF LSO Interlude MEF 133.1 streaming template
MEF 133.1 streaming template — the AsyncAPI definition published by Mplify (formerly MEF) in the MEF LSO Interlude SDK, Kylie release. LSO Interlude is the Interface Reference P...
MEF LSO Legato Legato Service Catalog API
Legato Service Catalog API — the OpenAPI definition published by Mplify (formerly MEF) in the MEF LSO Legato SDK, Kylie release. LSO Legato is the Interface Reference Point betw...
MEF LSO Legato Legato Service Catalog Notification API
Legato Service Catalog Notification API — the OpenAPI definition published by Mplify (formerly MEF) in the MEF LSO Legato SDK, Kylie release. LSO Legato is the Interface Referen...
MEF Alarm Management (Mef Lso Allegro Alarm Management)
MEF Alarm Management from MEF — 4 path(s) described in OpenAPI.
MEF Alarm Notification (Mef Lso Allegro Alarm Notification)
MEF Alarm Notification from MEF — 4 path(s) described in OpenAPI.
MEF Fault Management (Mef Lso Allegro Fault Management)
MEF Fault Management from MEF — 15 path(s) described in OpenAPI.
MEF Fault Management Notification (Mef Lso Allegro Fault Notification)
MEF Fault Management Notification from MEF — 9 path(s) described in OpenAPI.
MEF Performance Monitoring (Mef Lso Allegro Performance Monitoring)
MEF Performance Monitoring from MEF — 17 path(s) described in OpenAPI.
MEF Performance Monitoring Notification (Mef Lso Allegro Performance Notification)
MEF Performance Monitoring Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing Notification (Mef Lso Allegro Service Function Test Notification)
MEF Service Function Testing Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing (Mef Lso Allegro Service Function Test)
MEF Service Function Testing from MEF — 16 path(s) described in OpenAPI.
MEF Service Inventory Management (Mef Lso Allegro Service Inventory Management)
MEF Service Inventory Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Inventory Notification (Mef Lso Allegro Service Inventory Notification)
MEF Service Inventory Notification from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Management (Mef Lso Allegro Service Ordering Management)
MEF Service Ordering Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Notification (Mef Lso Allegro Service Ordering Notification)
MEF Service Ordering Notification from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Allegro Streaming Management All In One)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Allegro Streaming Management)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Appointment Management (Mef Lso Cantata Appointment Management)
MEF Appointment Management from MEF — 6 path(s) described in OpenAPI.
MEF Appointment Management Notification (Mef Lso Cantata Appointment Notification)
MEF Appointment Management Notification from MEF — 2 path(s) described in OpenAPI.
MEF Billing Management (Mef Lso Cantata Billing Management)
MEF Billing Management from MEF — 5 path(s) described in OpenAPI.
MEF Billing Notification (Mef Lso Cantata Billing Notification)
MEF Billing Notification from MEF — 2 path(s) described in OpenAPI.
MEF Circuit Impairment and Maintenance Notification (Mef Lso Cantata Circuit Impairment And Maintenance Notification)
MEF Circuit Impairment and Maintenance Notification from MEF — 3 path(s) described in OpenAPI.
MEF Circuit Impairment and Maintenance (Mef Lso Cantata Circuit Impairment And Maintenance)
MEF Circuit Impairment and Maintenance from MEF — 4 path(s) described in OpenAPI.
MEF Geographic Address Management (Mef Lso Cantata Geographic Address Management)
MEF Geographic Address Management from MEF — 5 path(s) described in OpenAPI.
MEF Geographic Address Notification (Mef Lso Cantata Geographic Address Notification)
MEF Geographic Address Notification from MEF — 1 path(s) described in OpenAPI.
MEF Geographic Site Management (Mef Lso Cantata Geographic Site Management)
MEF Geographic Site Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Catalog Notification (Mef Lso Cantata Product Catalog Notification)
MEF Product Catalog Notification from MEF — 8 path(s) described in OpenAPI.
MEF Product Catalog (Mef Lso Cantata Product Catalog)
MEF Product Catalog from MEF — 8 path(s) described in OpenAPI.
MEF Product Inventory Management (Mef Lso Cantata Product Inventory Management)
MEF Product Inventory Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Offering Availability And Pricing Discovery Management (Mef Lso Cantata Product Offering Availability And Pricing Discovery)
MEF Product Offering Availability And Pricing Discovery Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Offering Qualification Management (Mef Lso Cantata Product Offering Qualification Management)
MEF Product Offering Qualification Management from MEF — 4 path(s) described in OpenAPI.
MEF Product Offering Qualification Notification (Mef Lso Cantata Product Offering Qualification Notification)
MEF Product Offering Qualification Notification from MEF — 2 path(s) described in OpenAPI.
MEF Product Ordering Management (Mef Lso Cantata Product Order Management)
MEF Product Ordering Management from MEF — 10 path(s) described in OpenAPI.
MEF Product Ordering Notification (Mef Lso Cantata Product Order Notification)
MEF Product Ordering Notification from MEF — 9 path(s) described in OpenAPI.
MEF Quote Management (Mef Lso Cantata Quote Management)
MEF Quote Management from MEF — 6 path(s) described in OpenAPI.
MEF Quote Notification (Mef Lso Cantata Quote Notification)
MEF Quote Notification from MEF — 2 path(s) described in OpenAPI.
MEF Trouble Ticket and Incident Management (Mef Lso Cantata Trouble Ticket Management)
MEF Trouble Ticket and Incident Management from MEF — 9 path(s) described in OpenAPI.
MEF Trouble Ticket and Incident Notification (Mef Lso Cantata Trouble Ticket Notification)
MEF Trouble Ticket and Incident Notification from MEF — 7 path(s) described in OpenAPI.
MEF WorkOrder Management (Mef Lso Cantata Workorder Management)
MEF WorkOrder Management from MEF — 4 path(s) described in OpenAPI.
MEF WorkOrder Management Notification (Mef Lso Cantata Workorder Notification)
MEF WorkOrder Management Notification from MEF — 3 path(s) described in OpenAPI.
MEF Alarm Management (Mef Lso Interlude Alarm Management)
MEF Alarm Management from MEF — 4 path(s) described in OpenAPI.
MEF Alarm Notification (Mef Lso Interlude Alarm Notification)
MEF Alarm Notification from MEF — 4 path(s) described in OpenAPI.
MEF Fault Management (Mef Lso Interlude Fault Management)
MEF Fault Management from MEF — 15 path(s) described in OpenAPI.
MEF Fault Management Notification (Mef Lso Interlude Fault Notification)
MEF Fault Management Notification from MEF — 9 path(s) described in OpenAPI.
MEF Performance Monitoring (Mef Lso Interlude Performance Monitoring)
MEF Performance Monitoring from MEF — 17 path(s) described in OpenAPI.
MEF Performance Monitoring Notification (Mef Lso Interlude Performance Notification)
MEF Performance Monitoring Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing Notification (Mef Lso Interlude Service Function Test Notification)
MEF Service Function Testing Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing (Mef Lso Interlude Service Function Test)
MEF Service Function Testing from MEF — 16 path(s) described in OpenAPI.
MEF Service Inventory Management (Mef Lso Interlude Service Inventory Management)
MEF Service Inventory Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Inventory Notification (Mef Lso Interlude Service Inventory Notification)
MEF Service Inventory Notification from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Management (Mef Lso Interlude Service Ordering Management)
MEF Service Ordering Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Notification (Mef Lso Interlude Service Ordering Notification)
MEF Service Ordering Notification from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Interlude Streaming Management All In One)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Interlude Streaming Management)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Alarm Management (Mef Lso Legato Alarm Management)
MEF Alarm Management from MEF — 4 path(s) described in OpenAPI.
MEF Alarm Notification (Mef Lso Legato Alarm Notification)
MEF Alarm Notification from MEF — 4 path(s) described in OpenAPI.
MEF Fault Management (Mef Lso Legato Fault Management)
MEF Fault Management from MEF — 15 path(s) described in OpenAPI.
MEF Fault Management Notification (Mef Lso Legato Fault Notification)
MEF Fault Management Notification from MEF — 9 path(s) described in OpenAPI.
MEF Performance Monitoring (Mef Lso Legato Performance Monitoring)
MEF Performance Monitoring from MEF — 17 path(s) described in OpenAPI.
MEF Performance Monitoring Notification (Mef Lso Legato Performance Notification)
MEF Performance Monitoring Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing Notification (Mef Lso Legato Service Function Test Notification)
MEF Service Function Testing Notification from MEF — 12 path(s) described in OpenAPI.
MEF Service Function Testing (Mef Lso Legato Service Function Test)
MEF Service Function Testing from MEF — 16 path(s) described in OpenAPI.
MEF Service Inventory Management (Mef Lso Legato Service Inventory Management)
MEF Service Inventory Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Inventory Notification (Mef Lso Legato Service Inventory Notification)
MEF Service Inventory Notification from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Management (Mef Lso Legato Service Ordering Management)
MEF Service Ordering Management from MEF — 4 path(s) described in OpenAPI.
MEF Service Ordering Notification (Mef Lso Legato Service Ordering Notification)
MEF Service Ordering Notification from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Legato Streaming Management All In One)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Streaming Management (Mef Lso Legato Streaming Management)
MEF Streaming Management from MEF — 4 path(s) described in OpenAPI.
MEF Network Resource Provisioning
MEF Network Resource Provisioning from MEF — 32 path(s) described in OpenAPI.
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API (Mef Lso Presto Nrp Rcp Only)
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API from MEF — 17 path(s) described in OpenAPI.
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API (Mef Lso Presto Nrp Rpc Only Simplified Hierarchy)
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API from MEF — 14 path(s) described in OpenAPI.
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API (Mef Lso Presto Nrp Simplified Hierarchy)
mef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API from MEF — 32 path(s) described in OpenAPI.
MEF Appointment Management (Mef Lso Sonata Appointment Management)
MEF Appointment Management from MEF — 6 path(s) described in OpenAPI.
MEF Appointment Management Notification (Mef Lso Sonata Appointment Notification)
MEF Appointment Management Notification from MEF — 2 path(s) described in OpenAPI.
MEF Billing Management (Mef Lso Sonata Billing Management)
MEF Billing Management from MEF — 5 path(s) described in OpenAPI.
MEF Billing Notification (Mef Lso Sonata Billing Notification)
MEF Billing Notification from MEF — 2 path(s) described in OpenAPI.
MEF Circuit Impairment and Maintenance Notification (Mef Lso Sonata Circuit Impairment And Maintenance Notification)
MEF Circuit Impairment and Maintenance Notification from MEF — 3 path(s) described in OpenAPI.
MEF Circuit Impairment and Maintenance (Mef Lso Sonata Circuit Impairment And Maintenance)
MEF Circuit Impairment and Maintenance from MEF — 4 path(s) described in OpenAPI.
MEF Geographic Address Management (Mef Lso Sonata Geographic Address Management)
MEF Geographic Address Management from MEF — 5 path(s) described in OpenAPI.
MEF Geographic Address Notification (Mef Lso Sonata Geographic Address Notification)
MEF Geographic Address Notification from MEF — 1 path(s) described in OpenAPI.
MEF Geographic Site Management (Mef Lso Sonata Geographic Site Management)
MEF Geographic Site Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Catalog Notification (Mef Lso Sonata Product Catalog Notification)
MEF Product Catalog Notification from MEF — 8 path(s) described in OpenAPI.
MEF Product Catalog (Mef Lso Sonata Product Catalog)
MEF Product Catalog from MEF — 8 path(s) described in OpenAPI.
MEF Product Inventory Management (Mef Lso Sonata Product Inventory Management)
MEF Product Inventory Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Offering Availability And Pricing Discovery Management (Mef Lso Sonata Product Offering Availability And Pricing Discovery)
MEF Product Offering Availability And Pricing Discovery Management from MEF — 2 path(s) described in OpenAPI.
MEF Product Offering Qualification Management (Mef Lso Sonata Product Offering Qualification Management)
MEF Product Offering Qualification Management from MEF — 4 path(s) described in OpenAPI.
MEF Product Offering Qualification Notification (Mef Lso Sonata Product Offering Qualification Notification)
MEF Product Offering Qualification Notification from MEF — 2 path(s) described in OpenAPI.
MEF Product Ordering Management (Mef Lso Sonata Product Order Management)
MEF Product Ordering Management from MEF — 10 path(s) described in OpenAPI.
MEF Product Ordering Notification (Mef Lso Sonata Product Order Notification)
MEF Product Ordering Notification from MEF — 9 path(s) described in OpenAPI.
MEF Quote Management (Mef Lso Sonata Quote Management)
MEF Quote Management from MEF — 6 path(s) described in OpenAPI.
MEF Quote Notification (Mef Lso Sonata Quote Notification)
MEF Quote Notification from MEF — 2 path(s) described in OpenAPI.
MEF Trouble Ticket and Incident Management (Mef Lso Sonata Trouble Ticket Management)
MEF Trouble Ticket and Incident Management from MEF — 9 path(s) described in OpenAPI.
MEF Trouble Ticket and Incident Notification (Mef Lso Sonata Trouble Ticket Notification)
MEF Trouble Ticket and Incident Notification from MEF — 7 path(s) described in OpenAPI.
MEF WorkOrder Management (Mef Lso Sonata Workorder Management)
MEF WorkOrder Management from MEF — 4 path(s) described in OpenAPI.
MEF WorkOrder Management Notification (Mef Lso Sonata Workorder Notification)
MEF WorkOrder Management Notification from MEF — 3 path(s) described in OpenAPI.
Scroll for all 95
Open Collections 94
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Alarm Management
OPEN COLLECTIONAlarm Notification
OPEN COLLECTIONFault Management
OPEN COLLECTIONFault Management Notification
OPEN COLLECTIONPerformance Monitoring
OPEN COLLECTIONPerformance Monitoring Notification
OPEN COLLECTIONService Function Testing Notification
OPEN COLLECTIONService Function Testing
OPEN COLLECTIONService Inventory Management
OPEN COLLECTIONService Inventory Notification
OPEN COLLECTIONService Ordering Management
OPEN COLLECTIONService Ordering Notification
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONAppointment Management
OPEN COLLECTIONAppointment Management Notification
OPEN COLLECTIONBilling Management
OPEN COLLECTIONBilling Notification
OPEN COLLECTIONCircuit Impairment and Maintenance Notification
OPEN COLLECTIONCircuit Impairment and Maintenance
OPEN COLLECTIONGeographic Address Management
OPEN COLLECTIONGeographic Address Notification
OPEN COLLECTIONGeographic Site Management
OPEN COLLECTIONProduct Catalog Notification
OPEN COLLECTIONProduct Catalog
OPEN COLLECTIONProduct Inventory Management
OPEN COLLECTIONProduct Offering Qualification Management
OPEN COLLECTIONProduct Offering Qualification Notification
OPEN COLLECTIONProduct Ordering Management
OPEN COLLECTIONProduct Ordering Notification
OPEN COLLECTIONQuote Management
OPEN COLLECTIONQuote Notification
OPEN COLLECTIONTrouble Ticket and Incident Management
OPEN COLLECTIONTrouble Ticket and Incident Notification
OPEN COLLECTIONWorkOrder Management
OPEN COLLECTIONWorkOrder Management Notification
OPEN COLLECTIONAlarm Management
OPEN COLLECTIONAlarm Notification
OPEN COLLECTIONFault Management
OPEN COLLECTIONFault Management Notification
OPEN COLLECTIONPerformance Monitoring
OPEN COLLECTIONPerformance Monitoring Notification
OPEN COLLECTIONService Function Testing Notification
OPEN COLLECTIONService Function Testing
OPEN COLLECTIONService Inventory Management
OPEN COLLECTIONService Inventory Notification
OPEN COLLECTIONService Ordering Management
OPEN COLLECTIONService Ordering Notification
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONAlarm Management
OPEN COLLECTIONAlarm Notification
OPEN COLLECTIONFault Management
OPEN COLLECTIONFault Management Notification
OPEN COLLECTIONPerformance Monitoring
OPEN COLLECTIONPerformance Monitoring Notification
OPEN COLLECTIONLegato Service Catalog API
OPEN COLLECTIONLegato Service Catalog Notification API
OPEN COLLECTIONService Function Testing Notification
OPEN COLLECTIONService Function Testing
OPEN COLLECTIONService Inventory Management
OPEN COLLECTIONService Inventory Notification
OPEN COLLECTIONService Ordering Management
OPEN COLLECTIONService Ordering Notification
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONStreaming Management
OPEN COLLECTIONmef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API
OPEN COLLECTIONmef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API
OPEN COLLECTIONmef-common,tapi-topology,tapi-common,tapi-connectivity,mef-common-types,nrm-connectivity,nrp-interface API
OPEN COLLECTIONNetwork Resource Provisioning
OPEN COLLECTIONAppointment Management
OPEN COLLECTIONAppointment Management Notification
OPEN COLLECTIONBilling Management
OPEN COLLECTIONBilling Notification
OPEN COLLECTIONCircuit Impairment and Maintenance Notification
OPEN COLLECTIONCircuit Impairment and Maintenance
OPEN COLLECTIONGeographic Address Management
OPEN COLLECTIONGeographic Address Notification
OPEN COLLECTIONGeographic Site Management
OPEN COLLECTIONProduct Catalog Notification
OPEN COLLECTIONProduct Catalog
OPEN COLLECTIONProduct Inventory Management
OPEN COLLECTIONProduct Offering Qualification Management
OPEN COLLECTIONProduct Offering Qualification Notification
OPEN COLLECTIONProduct Ordering Management
OPEN COLLECTIONProduct Ordering Notification
OPEN COLLECTIONQuote Management
OPEN COLLECTIONQuote Notification
OPEN COLLECTIONTrouble Ticket and Incident Management
OPEN COLLECTIONTrouble Ticket and Incident Notification
OPEN COLLECTIONWorkOrder Management
OPEN COLLECTIONWorkOrder Management Notification
OPEN COLLECTIONScroll for all 94
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Event Specifications 2
AsyncAPI definitions for this provider's event-driven and streaming APIs.
MEF 133.1 streaming template
ASYNCAPIMef Webhooks
ASYNCAPISecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Resources
Get Started 5
Portal, sign-up, and the first successful call
Documentation 4
Reference material describing how the API behaves
Agent Surfaces 8
MCP servers, agent skills, and machine-readable catalogs
Scroll for all 8
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll for all 7
Build 8
SDKs, sample code, and the tooling you integrate with
Scroll for all 8
Access & Security 4
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 6
The organization behind the API
Other 3
Properties that don't map to a standard resource type