SOAP

SOAP (Simple Object Access Protocol) is an XML-based messaging protocol for exchanging structured information in web services, standardized by W3C as SOAP 1.2 (2003). It provides a platform-independent, language-neutral framework for web service communication with built-in standards for security (WS-Security), reliable messaging (WS-ReliableMessaging), and transactions (WS-Transaction). SOAP messages consist of an Envelope containing an optional Header and a required Body.

SOAP publishes 1 API on the APIs.io network. Tagged areas include SOAP, Messaging Protocol, Web Services, XML, and W3C Standard.

The SOAP catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

🌐 Visit website 📡 Source on GitHub

20.5/100 emerging ▬ flat Agent 4/100 human only Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

AccessFreemium

1 API

SOAPMessaging ProtocolWeb Services XMLW3C StandardEnterprise IntegrationWS-Star

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 20.5/100 · emerging

Contract Quality 7.1 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 2.7 / 17

Operational Transparency 0.9 / 11

Contract Governance 2.4 / 10

Discoverability 5.0 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/soap: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

SOAP 1.2 Protocol

SOAP Version 1.2 (W3C Recommendation, 2003/2007 Second Edition) is a lightweight protocol for exchanging structured information in a decentralized, distributed environment. It d...

Pricing Plans 1

Published pricing tiers and plan structures.

Soap Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Soap Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Soap Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Soap Context

6 classes · 13 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SOAP API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 5

Standalone JSON Schema definitions for this provider's data models.

SOAP Body

2 properties

JSON SCHEMA

SOAP Envelope

3 properties

JSON SCHEMA

SOAP Fault

5 properties

JSON SCHEMA

SOAP Header Block

6 properties

JSON SCHEMA

SOAP Header

1 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Soap Envelope Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Soap Envelope Example

4 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Soap Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 6

Reference material describing how the API behaves

W3C SOAP 1.2 Specification

W3C SOAP 1.2 Specification

W3C SOAP Specifications Index

W3C SOAP Specifications Index

JSONSchema

JSONSchema

JSONSchema

JSONSchema

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLDContext

JSONLDContext

Vocabulary

Vocabulary

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 4

Properties that don't map to a standard resource type

W3C SOAP 1.2 Adjuncts

W3C SOAP 1.2 Adjuncts

SOAP 1.1 Note

SOAP 1.1 Note

W3C XML Protocol Working Group

W3C XML Protocol Working Group

Wikipedia

Wikipedia

Source (apis.yml)

deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/soap.png
name: SOAP
description: SOAP (Simple Object Access Protocol) is an XML-based messaging protocol for exchanging structured information
  in web services, standardized by W3C as SOAP 1.2 (2003). It provides a platform-independent, language-neutral framework
  for web service communication with built-in standards for security (WS-Security), reliable messaging (WS-ReliableMessaging),
  and transactions (WS-Transaction). SOAP messages consist of an Envelope containing an optional Header and a required Body.
url: https://www.w3.org/TR/soap12/
tags:
- SOAP
- Messaging Protocol
- Web Services
- XML
- W3C Standard
- Enterprise Integration
- WS-Star
created: '2025'
modified: '2026-05-02'
specificationVersion: '0.23'
apis:
- aid: soap:soap-protocol
  name: SOAP 1.2 Protocol
  description: SOAP Version 1.2 (W3C Recommendation, 2003/2007 Second Edition) is a lightweight protocol for exchanging structured
    information in a decentralized, distributed environment. It defines an XML message format with Envelope/Header/Body structure
    and a Fault mechanism for error handling.
  humanURL: https://www.w3.org/TR/soap12/
  tags:
  - SOAP
  - XML
  - Messaging Protocol
  - W3C Standard
  properties:
  - type: Specification
    url: https://www.w3.org/TR/soap12-part1/
  - type: Specification
    url: https://www.w3.org/TR/soap12-part2/
  - type: Adjuncts
    url: https://www.w3.org/TR/soap12-part2/
  - type: JSONSchema
    url: json-schema/soap-envelope.json
  - type: JSONSchema
    url: json-schema/soap-header.json
  - type: JSONSchema
    url: json-schema/soap-header-block.json
  - type: JSONSchema
    url: json-schema/soap-body.json
  - type: JSONSchema
    url: json-schema/soap-fault.json
  - type: JSONLDContext
    url: json-ld/soap-context.jsonld
  - type: JSONStructure
    url: json-structure/soap-envelope-structure.json
  - type: Vocabulary
    url: vocabulary/soap-vocabulary.yml
  - type: Examples
    url: examples/soap-envelope-example.json
common:
- type: Website
  url: https://www.w3.org/
- type: DomainSecurity
  url: security/soap-domain-security.yml
- type: W3C SOAP 1.2 Specification
  url: https://www.w3.org/TR/soap12-part1/
- type: W3C SOAP 1.2 Adjuncts
  url: https://www.w3.org/TR/soap12-part2/
- type: W3C SOAP Specifications Index
  url: https://www.w3.org/TR/soap/
- type: SOAP 1.1 Note
  url: https://www.w3.org/TR/2000/NOTE-SOAP-20000508/
- type: W3C XML Protocol Working Group
  url: https://www.w3.org/2000/xp/Group/
- type: Wikipedia
  url: https://en.wikipedia.org/wiki/SOAP
- type: JSONSchema
  url: json-schema/soap-envelope.json
- type: JSONSchema
  url: json-schema/soap-header.json
- type: JSONSchema
  url: json-schema/soap-body.json
- type: JSONSchema
  url: json-schema/soap-fault.json
- type: JSONLDContext
  url: json-ld/soap-context.jsonld
- type: Vocabulary
  url: vocabulary/soap-vocabulary.yml

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