posture · 0.0 posture schema

Legacy

Score 19.7 / 100 21 providers +92 via APIs 112 APIs Search apis.io →
Business capabilities this tag reaches
Compliance Management 1

Providers using this tag (21)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Emerging 4 Early or largely undocumented
A2MeFamilySocialPhoto Sharing1 API18.2NovellCompanyEnterprise SoftwareCollaborationEmail3 APIs25.6AngularJSEnd of LifeFrameworkFrontendGoogle1 API12.5ArtifactCompanyConsumerFamily StoriesAudio12.5
Minimal 16 Almost no public developer surface
IIS RescueMigrationIISCloud1 API8.1S3 GraphicsCompanyGraphicsGPUSemiconductors2.6IASIS HealthcareAcquiredHealthcareHospitals2.1Nexeo Solutions HoldingsChemicalsPlasticsDistribution1.7MacromediaCompanyDeveloper ToolsSoftwareAdobe4.9OccamnetworksCompanyTelecommunicationsBroadbandNetworking4.0BaanCompanyERPEnterprise SoftwareManufacturing3.3IHSAnalyticsEnergyFinancial ServicesInformation Services2.8HotmailCompanyEmailWebmailConsumer2.6DST SystemsFinancial ServicesHealthcareOutsourcing2.1PlaxoCompanyContactsSocial1.3Brooktrout TechnologyCompanyFaxTelephonyVoice0.0GenuityTelecommunicationsInternet InfrastructureAcquired0.0Identify SoftwareCompanyEnterprise SoftwareApplication Performance ManagementSoftware Testing0.0iMedeonCompanyWorkforce ManagementMobile WorkforceField Service Management0.0VerioCompanyWeb HostingInternet Service ProviderDomains0.0
Unrated 1 Not yet scored
Remedy CorporationCompanyITSMEnterprise SoftwareHelp Desk

APIs with this tag (112)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 12 Complete, well-documented, and agent-ready
Salesforce Aura ComponentsSalesforce Aura Components is the legacy JavaScript component framework for building dynamic web applicatio...88.0GitHub Legacy APIThe Legacy API from GitHub — 2 operation(s) for legacy.85.0Jira Cloud Platform REST API v2Version 2 of the Jira Cloud platform REST API, offering the same operations as v3 but without Atlassian Doc...82.4Snyk V1 API (Legacy)The original Snyk REST API. Still in use for project import, monitor, test, and certain reporting endpoints...80.8SOAP APILegacy SOAP-based API for Marketing Cloud operations, including email sends, subscriber management, and dat...77.60xArchive Legacy APIDeprecated endpoints that default to Hyperliquid. Use the exchange-specific endpoints (`/v1/hyperliquid/*`,...74.9Cvent SOAP API (Legacy)The Cvent SOAP API is the original legacy API for pushing and pulling data between Cvent and internal syste...72.6MailerLite Classic API (Legacy)The MailerLite Classic API serves legacy MailerLite Classic accounts. New integrations should target the cu...71.4Azure AD Authentication Library (ADAL)Authentication library for Azure AD (being replaced by MSAL).71.3Azure AD Graph API (Deprecated)Legacy REST API for Azure Active Directory (being replaced by Microsoft Graph).71.3Nutshell Legacy JSON-RPC APINutshell's original JSON-RPC API, available since 2010. Nutshell states it is no longer adding new endpoint...68.1MX Atrium APIThe legacy MX financial data connectivity API supporting over 48,000 data connections to thousands of finan...66.7
Strong 20 Solid coverage with minor gaps
cPanel API 2 (Legacy)cPanel API 2 is the legacy XML/JSON API for cPanel-user operations. cPanel marks the whole system deprecate...65.1Adobe Analytics 1.4 APIThe Adobe Analytics 1.4 APIs provide programmatic access to reporting, classifications, data sources, and r...65.0Exchange Web Services (EWS)Legacy SOAP-based API for Exchange Server providing comprehensive access to mailbox data and operations. Pl...64.9Raygun Pulse RUM API (Legacy)Legacy enterprise-only Real User Monitoring read API at api.raygun.com/api/v1/pulse. Uses a Client ID/Secre...64.2Cvent SOAP Web Services API (V200611)Cvent's legacy SOAP 1.1 / WSDL 1.1 / WS-I Basic Profile 1.1 Web Services API, still served and still docume...64.0Kraken Spot WebSocket API v1 (Legacy)Legacy Kraken Spot WebSocket API. Continues to operate alongside v2 but v2 is the recommended path for new ...63.1AssetFare Legacy v1 Compatibility APIThe earlier v1 route API (wallet auth, quote, session and status), still served for compatibility and liste...61.9Cobot API v1 (legacy)The original Cobot REST API, still available and still the only surface that carries the webhook subscripti...60.2Clearbit Risk APIScores an email address for fraud and abuse risk. Endpoint /v1/calculate?email=. Verified live 2026-08-13 (...59.3Kensho Scribe Batch API v1Legacy v1 batch transcription endpoint (POST /api/v1/transcription). Superseded by the v2 batch API which d...58.6Thomas Jefferson University Hospital FHIR DSTU2 APIThe legacy Thomas Jefferson University Hospital DSTU2 FHIR endpoint listed in Epic's public R4 endpoint reg...58.4Grade Legacy APIThe Legacy API from Grade — 1 operation(s) for legacy.58.1PortOne REST API (V1, legacy Iamport)Legacy V1 (Iamport) REST API on api.iamport.kr — token-authenticated (POST /users/getToken with imp_key/imp...56.5Northern Powergrid Open Data Search API v1The original Opendatasoft Search API, still live on the portal and still carrying its own interactive conso...56.1Decisiv Platform APIThe original XML Platform API for service providers and dealer systems, covering the lifecycle of a service...55.8Hydro-Québec Open Data Search API v1The legacy Opendatasoft Search API v1 still served on the Hydro-Québec open data portal. Verified live and ...55.4Pynt Legacy APIThe legacy API from Pynt — 3 operation(s) for legacy.55.1Lever Candidates APIThe Candidates API from Lever — 11 operation(s) for candidates.55.0Eli Legacy APIDeprecated read-only REST v1.54.7Webz.io Web Content API (deprecated)Legacy unified `/filterWebContent` endpoint (GET or POST) that returned any open-web content type in one ca...54.3
Developing 37 Usable, with meaningful gaps to close
AccountsIQ Integration API 1.1The legacy AIQ SOAP 1.1 integration web service, still published and supported alongside 2.0. 217 operation...54.2Cisco Expressway XML APILegacy XML-based API for configuration and status retrieval on Cisco Expressway systems. Uses HTTP Basic Au...54.0Temple Health FHIR DSTU2 APIThe legacy Temple Health DSTU2 FHIR endpoint listed in Epic's public DSTU2 endpoint registry under the orga...53.1Adobe CEP (Common Extensibility Platform)The Common Extensibility Platform (CEP) is Adobe's legacy framework for building integrated HTML5 panels ac...53.0TrustRadius Legacy Visitor Insights APIIdentified-company reporting, tagged `Legacy` by TrustRadius in its own specification. GET /reports/visitor...52.7Frase Legacy APILegacy API endpoints for backward compatibility52.4SPIRL Management API (legacy)The pre-rebrand SPIRL control-plane endpoint, still documented and still serving the legacy app.spirl.com c...49.6IonQ Quantum Cloud API (v0.3 Legacy)The previous-generation IonQ Quantum Cloud REST API (v0.3) for submitting and managing jobs, characterizati...49.4Adobe Photoshop ExtendScript Scripting APIThe legacy scripting system based on ExtendScript, Adobe's implementation of ECMAScript 3. ExtendScript scr...49.0Airtel Smart API (legacy)Airtel's original partner developer programme, launched in 2017 and now an unmaintained legacy portal (the ...49.0sqlguard-io Legacy APIThe legacy API from sqlguard-io — 1 operation(s) for legacy.48.2StackOne Unified ATS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified ATS AP...47.8StackOne Unified CRM API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified CRM AP...47.8StackOne Unified Documents API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Docume...47.8StackOne Unified HRIS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified HRIS A...47.8StackOne Unified IAM API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified IAM AP...47.8StackOne Unified LMS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified LMS AP...47.8StackOne Unified Marketing API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Market...47.8StackOne Unified Messaging API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Messag...47.8StackOne Unified Screening API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Screen...47.8StackOne Unified Ticketing API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Ticket...47.8Apache Airflow Experimental APIThe experimental API from Apache Airflow — 1 operation(s) for experimental.47.3Oracle Health Millennium FHIR DSTU2 APIThe Cerner Millennium DSTU2 FHIR API supports legacy SMART on FHIR applications and integrations with Meani...47.3Udesk Open API v1 (legacy)Legacy Open API kept for existing integrations (tickets, customers, IM, call center, help center) with MD5 ...47.0MagicBell REST API v1The legacy MagicBell REST API (v1) for notification delivery, user management, and channel configuration. S...45.8Stanford University Legacy APILegacy endpoints45.8Cloudability API v1 (Legacy)The legacy v1 API remains available for older integrations covering cost reporting and dimensions. Apptio r...45.7Dell WSMan APIWeb Services Management API for Dell server hardware management. WSMan provides a SOAP-based interface for ...44.2africanmarketos-com Legacy APIThe Legacy API from africanmarketos-com — 1 operation(s) for legacy.44.0Trestle RETSTrestle's legacy Real Estate Transaction Standard interface, documented as compliant with RETS 1.8. RESO no...43.4LSEG DataScope Select - SOAP APISOAP-based web service API for DataScope Select, providing extraction functionality for global pricing, ref...43.3Trestle RETSTrestle's RETS endpoint implements the RETS 1.8 specification on top of the same data catalog as the RESO W...42.9Arcadia Utility Cloud API (Legacy)The legacy Utility Cloud REST API — predecessor to the Plug API — still documented for existing integration...42.5SP Energy Networks Open Data Search API (v1.0)The legacy Opendatasoft Search API v1.0 still served alongside Explore v2.1 on the SP Energy Networks Open ...42.5LiveIntent Legacy APILegacy endpoints for backward compatibility. These endpoints are deprecated and should not be used for new ...42.4ReadMe API (v1, Legacy)The legacy ReadMe API (HTTP Basic auth with an API key) for docs, categories, versions, custom pages, chang...41.6Entity Framework 6The mature and stable ORM for .NET Framework with Code First, Database First, and Model First workflows.41.1
Thin 20 Limited public surface area
Itron IEE Web ServicesLegacy web-service surface for Itron Enterprise Edition (IEE) Meter Data Management. Documented as a mix of...39.0Webex XML APIThe Webex XML API is the legacy SOAP-style interface for deep integration with Webex Meetings. It supports ...38.6USGS Water Services (Legacy)The original USGS NWIS water services API providing streamflow, groundwater, water quality, and site inform...38.4Opendatasoft Explore API v1 (Deprecated)Legacy REST API (v1) for searching datasets and records on Opendatasoft portals. Supports dataset search, d...38.2Agenta Legacy APIStable legacy endpoints retained for existing integrations — not deprecated, but new integrations should pr...38.1Maxar Content Catalog APILegacy Maxar Content Catalog API — the canonical search index against the WorldView / GeoEye / IKONOS / Qui...37.7Open Commerce API (OCAPI)Legacy REST API for B2C Commerce Cloud, organized into Shop API, Data API, and Meta API. Authentication use...34.3ClinicalTrials.gov Classic APIRETIRED. The Classic API was withdrawn in June 2024 and its endpoints now return HTTP 404 (probed 2026-09-0...34.0Elexon Legacy APIThe Legacy API from Elexon — 2 operation(s) for legacy.33.6PubChem PUG SOAP APILegacy SOAP/XML web service interface for PubChem providing structure search, identity search, and chemical...32.6Sezzle API v1The legacy Sezzle v1 API for merchants. Supports checkout creation and order completion via redirect-based ...31.8ReqRes Legacy APIThe Legacy API from ReqRes — 4 operation(s) for legacy.31.1Select Medical FHIR DSTU2 APILegacy HL7 FHIR DSTU2 (1.0.2) endpoint operated by Select Medical on the same Epic platform, registered as ...31.0Cloudbeds REST API v1.2 (Legacy)Earlier supported version of the Cloudbeds REST API. New integrations should target v1.3.30.2Kanban Tool REST API v1Legacy REST API for Kanban Tool. Supports both XML and JSON formats, uses a resource-oriented endpoint stru...29.1Nmbrs SOAP CompanyService (Legacy)Legacy SOAP v3 CompanyService (120+ operations, e.g. Company_GetCurrentPeriod, Run_GetList, RunRequest_Inse...28.6Nmbrs SOAP DebtorService (Legacy)Legacy SOAP v3 DebtorService for the accountant/debtor tier that owns companies (e.g. AccountantContact_Get...28.6Nmbrs SOAP EmployeeService (Legacy)Legacy SOAP v3 EmployeeService (300+ operations, e.g. Employee_GetCurrent, Contract_GetAll, Salary_GetCurre...28.6Sage Intacct XML APILegacy XML API providing programmatic access to general ledger, accounts payable, accounts receivable, orde...26.5Activeloop Legacy APIThe legacy API from Activeloop — 7 operation(s) for legacy.26.4
Emerging 16 Early or largely undocumented
Sourcegraph GraphQL APIThe historical GraphQL API used by most Sourcegraph integrations to date. It is still available but Sourceg...25.5Photon Bolt (Legacy, Deprecated)Legacy UDP-based Unity netcode product from Exit Games. No longer actively developed and not recommended fo...25.2Photon PUN (Photon Unity Networking) APIPhoton Unity Networking 2, the original high-level Unity multiplayer SDK layered over the Photon Realtime t...25.2Bitquery GraphQL API (V1)Legacy GraphQL endpoint covering Bitquery's V1 schema - kept for backward compatibility while customers mig...25.1OlympusDAO Legacy APIDeprecated WunderGraph-compatible /operations routes.23.0Zonos Checkout REST API (legacy)Legacy REST integration surface for Zonos Checkout, listed on the Zonos REST API reference index. No base U...22.6Zonos Classify REST API (legacy)Legacy REST endpoints for harmonizing a catalog to HS codes one item at a time or in bulk, with a group ide...22.6Zonos Landed Cost REST API (legacy)Legacy REST endpoint that returns a complete breakdown of the duties, taxes and fees making up a total land...22.6Zonos Order Complete REST API (legacy)Legacy REST endpoint that accepts the details of a shopper's completed order and returns the Zonos-specific...22.6Zonos Rating REST API (legacy)Legacy REST endpoint returning international shipping rates for carriers and service levels. Documented pat...22.6Chainguard API v1Chainguard API v1 is the legacy REST API for the Chainguard platform, covering the same broad surface as v2...21.9Habiteo Site JSON API (WordPress JSON API plugin)A second, older JSON surface on www.habiteo.com, served by the WordPress "JSON API" plugin at /api/. GET ht...18.4SmartSimple Web Services (SOAP) APIThe legacy SOAP Web Services API, exposed per instance via a WSDL at /WS/services/UtaUpdate?wsdl (for examp...15.0Fleet Complete Legacy Integration WebAPIOlder, regionally hosted OAuth REST surface predating the Unity GraphQL API, still referenced in Fleet Comp...13.9AngularJS Core APIThe AngularJS (Angular.js, version 1.x) core framework API for building dynamic single-page web application...12.5Blackboard Learn SOAP API (Legacy)Legacy SOAP web services for Blackboard Learn integrations.11.6
Minimal 7 Almost no public developer surface
Glassdoor Partner API (Legacy)Historical REST API that exposed job listings, employer reviews, salary reports, and company metadata to ap...10.7Ally Invest API (Legacy / Retired)The legacy Ally Invest brokerage REST API, inherited from Ally's 2016 acquisition of TradeKing. It offered ...9.6Aporia Guardrails (Legacy)The original Aporia Guardrails product offered millisecond-latency policy enforcement on LLM prompts and re...9.2Aporia ML Observability (Legacy)Aporia ML Observability provided monitoring for classical ML models including drift detection, data quality...9.2AI Firewall (Legacy)The Robust Intelligence AI Firewall provided runtime guardrails for LLM and ML applications, screening prom...8.2Algorithmic AI Red Teaming (Legacy)Algorithmic AI Red Teaming was Robust Intelligence's automated adversarial testing product for ML and LLM m...8.2Khan Academy API v1 (Legacy / Internal)Legacy REST API previously documented at api-explorer.khanacademy.org (now redirects). Some endpoints under...5.5

Companies reaching this through an API (92)

These companies publish an API, specification or operation carrying “Legacy” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

0xArchive AccountsIQ Activeloop Adobe Analytics Adobe Creative Cloud Adobe Photoshop africanmarketos-com Agenta Ally Financial Apache Airflow Aporia Arcadia AssetFare Bharti Airtel Bitquery Blackboard Chainguard Cisco Expressway Cisco Webex Meetings Clearbit (HubSpot Breeze Intelligence) ClinicalTrials.gov Cloudability Cloudbeds Cobot CoreLogic (Cotality) cPanel Cvent Cvent Hospitality Cloud Decisiv Defakto Security Dell Servers Elexon Eli Fleet Complete Frase GitHub Glassdoor Grade Habiteo Hydro-Québec IonQ Itron Jefferson Health Jira Kanban Tool Khan Academy Kraken Lever LiveIntent MagicBell
Show all 92 companies ↓
MailerLite Microsoft Active Directory Microsoft Entity Framework Microsoft Exchange MX Technologies Nmbrs Northern Powergrid Nutshell OlympusDAO Opendatasoft Oracle Health (Cerner) Photon Engine PortOne PubChem Pynt Raygun ReadMe.io Refinitiv ReqRes Robust Intelligence S&P Global Sage Intacct Salesforce Salesforce Commerce Cloud Salesforce Marketing Cloud ScottishPower Select Medical Holdings Sezzle SmartSimple Snyk Sourcegraph sqlguard-io StackOne Stanford University Temple Health Trestle TrustRadius U.S. Geological Survey Udesk Vantor Webz.io Zonos

Score breakdown

Frequency
48.7
log-scaled weighted occurrences
Breadth
0.1
spread across providers
Quality lift
10.6
mean composite of providers using it
Cohesion
36.1
strength of nearest seed neighbor

Related tags

SOAP 14 co-occurrences Deprecated 9 co-occurrences XML 5 co-occurrences OData 5 co-occurrences Email 14 co-occurrences REST 22 co-occurrences Datasets 11 co-occurrences Administration 5 co-occurrences

Where this tag comes from

Api tag112
Provider tag21
Openapi tag14
Openapi op tag56

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