posture · -0.2 posture schema

Legacy

Score 21.2 / 100 19 providers +81 via APIs 106 APIs Search apis.io →
Business capabilities this tag reaches
Compliance Management 1

Providers using this tag (19)

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

Emerging 2 Early or largely undocumented
NovellCompanyEnterprise SoftwareCollaborationEmail3 APIs25.4AngularJSEnd of LifeFrameworkFrontendGoogle1 API13.5
Minimal 16 Almost no public developer surface
S3 GraphicsCompanyGraphicsGPUSemiconductors3.4IASIS HealthcareAcquiredHealthcareHospitals2.8Nexeo Solutions HoldingsChemicalsPlasticsDistribution1.7ArtifactCompanyConsumerFamily StoriesAudio9.5OccamnetworksCompanyTelecommunicationsBroadbandNetworking5.1MacromediaCompanyDeveloper ToolsSoftwareAdobe5.0BaanCompanyERPEnterprise SoftwareManufacturing4.2IHSAnalyticsEnergyFinancial ServicesInformation Services3.6HotmailCompanyEmailWebmailConsumer3.4PlaxoCompanyContactsSocial2.2DST SystemsFinancial ServicesHealthcareOutsourcing2.1Brooktrout 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 (105)

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 8 Complete, well-documented, and agent-ready
Salesforce Aura ComponentsSalesforce Aura Components is the legacy JavaScript component framework for building dynamic web applicatio...88.8Snyk V1 API (Legacy)The original Snyk REST API. Still in use for project import, monitor, test, and certain reporting endpoints...79.1SOAP APILegacy SOAP-based API for Marketing Cloud operations, including email sends, subscriber management, and dat...79.1Cvent SOAP API (Legacy)The Cvent SOAP API is the original legacy API for pushing and pulling data between Cvent and internal syste...77.1Jira Cloud Platform REST API v2Version 2 of the Jira Cloud platform REST API, offering the same operations as v3 but without Atlassian Doc...75.30xArchive Legacy APIDeprecated endpoints that default to Hyperliquid. Use the exchange-specific endpoints (`/v1/hyperliquid/*`,...71.7MailerLite Classic API (Legacy)The MailerLite Classic API serves legacy MailerLite Classic accounts. New integrations should target the cu...71.4Adobe Analytics 1.4 APIThe Adobe Analytics 1.4 APIs provide programmatic access to reporting, classifications, data sources, and r...67.6
Strong 16 Solid coverage with minor gaps
MX Atrium APIThe legacy MX financial data connectivity API supporting over 48,000 data connections to thousands of finan...64.9cPanel API 2 (Legacy)cPanel API 2 is the legacy XML/JSON API for cPanel-user operations. cPanel marks the whole system deprecate...64.7Cvent 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...64.6Kraken Spot WebSocket API v1 (Legacy)Legacy Kraken Spot WebSocket API. Continues to operate alongside v2 but v2 is the recommended path for new ...64.4Azure AD Authentication Library (ADAL)Authentication library for Azure AD (being replaced by MSAL).61.8Azure AD Graph API (Deprecated)Legacy REST API for Azure Active Directory (being replaced by Microsoft Graph).61.8Kensho Scribe Batch API v1Legacy v1 batch transcription endpoint (POST /api/v1/transcription). Superseded by the v2 batch API which d...61.3Nutshell Legacy JSON-RPC APINutshell's original JSON-RPC API, available since 2010. Nutshell states it is no longer adding new endpoint...60.7AssetFare Legacy v1 Compatibility APIThe earlier v1 route API (wallet auth, quote, session and status), still served for compatibility and liste...59.3Thomas Jefferson University Hospital FHIR DSTU2 APIThe legacy Thomas Jefferson University Hospital DSTU2 FHIR endpoint listed in Epic's public R4 endpoint reg...59.2Exchange Web Services (EWS)Legacy SOAP-based API for Exchange Server providing comprehensive access to mailbox data and operations. Pl...58.7Clearbit Risk APIScores an email address for fraud and abuse risk. Endpoint /v1/calculate?email=. Verified live 2026-08-13 (...57.9Raygun Pulse RUM API (Legacy)Legacy enterprise-only Real User Monitoring read API at api.raygun.com/api/v1/pulse. Uses a Client ID/Secre...57.6TrustRadius Legacy Visitor Insights APIIdentified-company reporting, tagged `Legacy` by TrustRadius in its own specification. GET /reports/visitor...56.5Northern Powergrid Open Data Search API v1The original Opendatasoft Search API, still live on the portal and still carrying its own interactive conso...54.8Temple Health FHIR DSTU2 APIThe legacy Temple Health DSTU2 FHIR endpoint listed in Epic's public DSTU2 endpoint registry under the orga...54.5
Developing 39 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...54.2Webz.io Web Content API (deprecated)Legacy unified `/filterWebContent` endpoint (GET or POST) that returned any open-web content type in one ca...54.0Cisco Expressway XML APILegacy XML-based API for configuration and status retrieval on Cisco Expressway systems. Uses HTTP Basic Au...52.9Decisiv Platform APIThe original XML Platform API for service providers and dealer systems, covering the lifecycle of a service...52.2IonQ Quantum Cloud API (v0.3 Legacy)The previous-generation IonQ Quantum Cloud REST API (v0.3) for submitting and managing jobs, characterizati...51.9Hydro-Québec Open Data Search API v1The legacy Opendatasoft Search API v1 still served on the Hydro-Québec open data portal. Verified live and ...51.8Cobot API v1 (legacy)The original Cobot REST API, still available and still the only surface that carries the webhook subscripti...51.7Pynt Legacy APIThe legacy API from Pynt — 3 operation(s) for legacy.51.2Adobe CEP (Common Extensibility Platform)The Common Extensibility Platform (CEP) is Adobe's legacy framework for building integrated HTML5 panels ac...51.1Adobe Photoshop ExtendScript Scripting APIThe legacy scripting system based on ExtendScript, Adobe's implementation of ECMAScript 3. ExtendScript scr...50.7Udesk Open API v1 (legacy)Legacy Open API kept for existing integrations (tickets, customers, IM, call center, help center) with MD5 ...49.1PortOne REST API (V1, legacy Iamport)Legacy V1 (Iamport) REST API on api.iamport.kr — token-authenticated (POST /users/getToken with imp_key/imp...48.5SPIRL Management API (legacy)The pre-rebrand SPIRL control-plane endpoint, still documented and still serving the legacy app.spirl.com c...48.1Cloudability API v1 (Legacy)The legacy v1 API remains available for older integrations covering cost reporting and dimensions. Apptio r...47.0Airtel Smart API (legacy)Airtel's original partner developer programme, launched in 2017 and now an unmaintained legacy portal (the ...46.7Apache Airflow Experimental APIThe experimental API from Apache Airflow — 1 operation(s) for experimental.46.3Trestle RETSTrestle's legacy Real Estate Transaction Standard interface, documented as compliant with RETS 1.8. RESO no...45.9StackOne Unified ATS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified ATS AP...45.0StackOne Unified CRM API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified CRM AP...45.0StackOne Unified Documents API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Docume...45.0StackOne Unified HRIS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified HRIS A...45.0StackOne Unified IAM API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified IAM AP...45.0StackOne Unified LMS API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified LMS AP...45.0StackOne Unified Marketing API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Market...45.0StackOne Unified Messaging API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Messag...45.0StackOne Unified Screening API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Screen...45.0StackOne Unified Ticketing API (Legacy)Legacy (no longer in active development; existing functionality remains supported). StackOne Unified Ticket...45.0LSEG DataScope Select - SOAP APISOAP-based web service API for DataScope Select, providing extraction functionality for global pricing, ref...44.8Stanford University Legacy APILegacy endpoints44.8Oracle Health Millennium FHIR DSTU2 APIThe Cerner Millennium DSTU2 FHIR API supports legacy SMART on FHIR applications and integrations with Meani...44.7Maxar Content Catalog APILegacy Maxar Content Catalog API — the canonical search index against the WorldView / GeoEye / IKONOS / Qui...43.7Dell WSMan APIWeb Services Management API for Dell server hardware management. WSMan provides a SOAP-based interface for ...42.9Trestle RETSTrestle's RETS endpoint implements the RETS 1.8 specification on top of the same data catalog as the RESO W...42.5LiveIntent Legacy APILegacy endpoints for backward compatibility. These endpoints are deprecated and should not be used for new ...41.6Itron IEE Web ServicesLegacy web-service surface for Itron Enterprise Edition (IEE) Meter Data Management. Documented as a mix of...40.5Arcadia Utility Cloud API (Legacy)The legacy Utility Cloud REST API — predecessor to the Plug API — still documented for existing integration...40.4SP 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 ...40.3Webex XML APIThe Webex XML API is the legacy SOAP-style interface for deep integration with Webex Meetings. It supports ...40.3MagicBell REST API v1The legacy MagicBell REST API (v1) for notification delivery, user management, and channel configuration. S...40.1
Thin 19 Limited public surface area
ReadMe API (v1, Legacy)The legacy ReadMe API (HTTP Basic auth with an API key) for docs, categories, versions, custom pages, chang...39.0USGS Water Services (Legacy)The original USGS NWIS water services API providing streamflow, groundwater, water quality, and site inform...38.6Lever Candidates APILegacy Candidates endpoints maintained for backward compatibility. New integrations should use Opportunitie...36.6Opendatasoft Explore API v1 (Deprecated)Legacy REST API (v1) for searching datasets and records on Opendatasoft portals. Supports dataset search, d...36.5ClinicalTrials.gov Classic APIRETIRED. The Classic API was withdrawn in June 2024 and its endpoints now return HTTP 404 (probed 2026-09-0...36.4PubChem PUG SOAP APILegacy SOAP/XML web service interface for PubChem providing structure search, identity search, and chemical...35.0Open Commerce API (OCAPI)Legacy REST API for B2C Commerce Cloud, organized into Shop API, Data API, and Meta API. Authentication use...33.4ReqRes Legacy APIThe Legacy API from ReqRes — 4 operation(s) for legacy.33.4Entity Framework 6The mature and stable ORM for .NET Framework with Code First, Database First, and Model First workflows.32.7Sezzle API v1The legacy Sezzle v1 API for merchants. Supports checkout creation and order completion via redirect-based ...32.6Elexon Legacy APIThe Legacy API from Elexon — 2 operation(s) for legacy.32.4Select Medical FHIR DSTU2 APILegacy HL7 FHIR DSTU2 (1.0.2) endpoint operated by Select Medical on the same Epic platform, registered as ...30.6Cloudbeds REST API v1.2 (Legacy)Earlier supported version of the Cloudbeds REST API. New integrations should target v1.3.30.1Kanban Tool REST API v1Legacy REST API for Kanban Tool. Supports both XML and JSON formats, uses a resource-oriented endpoint stru...29.7Nmbrs SOAP CompanyService (Legacy)Legacy SOAP v3 CompanyService (120+ operations, e.g. Company_GetCurrentPeriod, Run_GetList, RunRequest_Inse...28.7Nmbrs SOAP DebtorService (Legacy)Legacy SOAP v3 DebtorService for the accountant/debtor tier that owns companies (e.g. AccountantContact_Get...28.7Nmbrs SOAP EmployeeService (Legacy)Legacy SOAP v3 EmployeeService (300+ operations, e.g. Employee_GetCurrent, Contract_GetAll, Salary_GetCurre...28.7Sage Intacct XML APILegacy XML API providing programmatic access to general ledger, accounts payable, accounts receivable, orde...26.3Bitquery GraphQL API (V1)Legacy GraphQL endpoint covering Bitquery's V1 schema - kept for backward compatibility while customers mig...26.2
Emerging 17 Early or largely undocumented
Sourcegraph GraphQL APIThe historical GraphQL API used by most Sourcegraph integrations to date. It is still available but Sourceg...26.0Photon Bolt (Legacy, Deprecated)Legacy UDP-based Unity netcode product from Exit Games. No longer actively developed and not recommended fo...25.5Photon PUN (Photon Unity Networking) APIPhoton Unity Networking 2, the original high-level Unity multiplayer SDK layered over the Photon Realtime t...25.5Activeloop Legacy APIThe legacy API from Activeloop — 7 operation(s) for legacy.24.5Zonos Checkout REST API (legacy)Legacy REST integration surface for Zonos Checkout, listed on the Zonos REST API reference index. No base U...23.5Zonos 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...23.5Zonos Landed Cost REST API (legacy)Legacy REST endpoint that returns a complete breakdown of the duties, taxes and fees making up a total land...23.5Zonos Order Complete REST API (legacy)Legacy REST endpoint that accepts the details of a shopper's completed order and returns the Zonos-specific...23.5Zonos Rating REST API (legacy)Legacy REST endpoint returning international shipping rates for carriers and service levels. Documented pat...23.5OlympusDAO Legacy APIDeprecated WunderGraph-compatible /operations routes.22.9Chainguard API v1Chainguard API v1 is the legacy REST API for the Chainguard platform, covering the same broad surface as v2...22.8Habiteo 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...17.1SmartSimple Web Services (SOAP) APIThe legacy SOAP Web Services API, exposed per instance via a WSDL at /WS/services/UtaUpdate?wsdl (for examp...16.1Fleet Complete Legacy Integration WebAPIOlder, regionally hosted OAuth REST surface predating the Unity GraphQL API, still referenced in Fleet Comp...14.4AngularJS Core APIThe AngularJS (Angular.js, version 1.x) core framework API for building dynamic single-page web application...13.5Blackboard Learn SOAP API (Legacy)Legacy SOAP web services for Blackboard Learn integrations.12.0Glassdoor Partner API (Legacy)Historical REST API that exposed job listings, employer reviews, salary reports, and company metadata to ap...11.1
Minimal 6 Almost no public developer surface
Aporia Guardrails (Legacy)The original Aporia Guardrails product offered millisecond-latency policy enforcement on LLM prompts and re...10.0Aporia ML Observability (Legacy)Aporia ML Observability provided monitoring for classical ML models including drift detection, data quality...10.0Ally Invest API (Legacy / Retired)The legacy Ally Invest brokerage REST API, inherited from Ally's 2016 acquisition of TradeKing. It offered ...9.6AI Firewall (Legacy)The Robust Intelligence AI Firewall provided runtime guardrails for LLM and ML applications, screening prom...9.1Algorithmic AI Red Teaming (Legacy)Algorithmic AI Red Teaming was Robust Intelligence's automated adversarial testing product for ML and LLM m...9.1Khan Academy API v1 (Legacy / Internal)Legacy REST API previously documented at api-explorer.khanacademy.org (now redirects). Some endpoints under...6.4

Companies reaching this through an API (81)

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 Ally Financial Apache Airflow Aporia AssetFare Bharti Airtel Bitquery Blackboard Chainguard Cisco Expressway Cisco Webex Meetings Claude Clearbit (HubSpot Breeze Intelligence) ClinicalTrials.gov Cloudability Cloudbeds Cobot CoreLogic (Cotality) cPanel Cvent Cvent Hospitality Cloud Decisiv Defakto Security Dell Servers Elexon Fleet Complete Glassdoor Habiteo Hydro-Québec Itron Jira Kanban Tool Khan Academy Kraken Lever LiveIntent Microsoft Active Directory Microsoft Entity Framework Microsoft Exchange MX Technologies Nmbrs Northern Powergrid Nutshell OlympusDAO Opendatasoft
Show all 81 companies ↓
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 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
11.8
mean composite of providers using it
Cohesion
44.0
strength of nearest seed neighbor

Related tags

SOAP 14 co-occurrences Deprecated 7 co-occurrences XML 5 co-occurrences OData 5 co-occurrences Email 12 co-occurrences Administration 6 co-occurrences Datasets 10 co-occurrences Contacts 11 co-occurrences

Where this tag comes from

Api tag106
Provider tag19
Openapi tag8
Openapi op tag44

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