# WSDL / SOAP

**Canonical:** https://apis.io/apis/specifications/wsdl-soap/  
**Provider:** API Specifications — https://apis.io/providers/specifications/  
**Base URL:** https://www.w3.org/TR/wsdl20/  
**Documentation:** https://www.w3.org/TR/wsdl/

WSDL / SOAP is one of 13 APIs that [API Specifications](https://apis.io/providers/specifications/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include WSDL, SOAP, W3C, XML, and Legacy. The published artifact set on APIs.io includes API documentation.

The Web Services Description Language (WSDL) is the historical XML-based interface definition language for SOAP web services. WSDL 1.1 (2001) is the most widely deployed version; WSDL 2.0 is a W3C Recommendation (2007). SOAP and WSDL are governed by the W3C and remain critical in legacy enterprise and government integrations. Documented here as the historical baseline for service interface specifications.

## Machine-readable artifacts (7)

- **Documentation** — https://www.w3.org/TR/wsdl20-primer/
- **Specification** — https://www.w3.org/TR/wsdl/
- **Specification** — https://www.w3.org/TR/wsdl20/
- **Specification** — https://www.w3.org/TR/soap12-part1/
- **Governance** — https://www.w3.org/groups/wg/ws-desc/
- **License** — https://www.w3.org/copyright/document-license-2023/
- **Examples** — https://raw.githubusercontent.com/api-evangelist/specifications/refs/heads/main/examples/wsdl-soap-example.json

## Other API Specifications APIs (12)

- [OpenAPI Specification (OAS)](https://apis.io/apis/specifications/openapi/)
- [AsyncAPI Specification](https://apis.io/apis/specifications/asyncapi/)
- [JSON Schema](https://apis.io/apis/specifications/json-schema/)
- [JSON Structure](https://apis.io/apis/specifications/json-structure/)
- [GraphQL SDL](https://apis.io/apis/specifications/graphql/)
- [gRPC and Protocol Buffers](https://apis.io/apis/specifications/grpc-protobuf/)
- [Smithy](https://apis.io/apis/specifications/smithy/)
- [TypeSpec](https://apis.io/apis/specifications/typespec/)
- [RAML (RESTful API Modeling Language)](https://apis.io/apis/specifications/raml/)
- [API Blueprint](https://apis.io/apis/specifications/api-blueprint/)
- [JSON-RPC 2.0](https://apis.io/apis/specifications/json-rpc/)
- [Tinybird API Spec](https://apis.io/apis/specifications/tinybird/)

## Tags

WSDL, SOAP, W3C, XML, Legacy, Historical, Specification Language

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/specifications/wsdl-soap/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/specifications/.