Esker

Esker is a software company that automates document-driven business processes for the Office of the CFO, with cloud solutions spanning Source-to-Pay (accounts payable, procurement) and Order-to-Cash (order management, credit, collections, e-invoicing), plus document delivery, fax (VSI-Fax) and terminal emulation products. Its site describes them as document automation and order management software that helps businesses cut costs and increase efficiencies. Developers integrate through the Esker on Demand Web Services API (SOAP/WSDL session, submission and query services), documented at doc.esker.com.

Esker is listed with 3 APIs on the APIs.io network. Tagged areas include Company, Accounts Payable, Order-to-Cash, Source-to-Pay, and Document Automation.

Esker’s developer surface includes authentication, documentation, API reference, engineering blog, support, YouTube channel, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.6/100 thin Agent 21/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

3 APIs

Company Accounts Payable Order-to-Cash Source-to-Pay Document Automation E-Invoicing Procurement SOAP

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 31.6/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 7.3 / 17

Access Clarity 6.3 / 17

Operational Transparency 2.0 / 11

Contract Governance 1.9 / 10

Discoverability 6.4 / 9

Regulatory Posture 5.9 / 15

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 36.8 — up to +12.6 composite points
Developer Ergonomics scores 42.9 — up to +11.4 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/esker/apis.yml: open an issue on github.com/api-evangelist/esker to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Procurement and B2B Buying (source-to-pay suites, spend management)	standard	33.2 (thin)	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 3

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

Esker on Demand Session Service

Entry point of the Esker on Demand Web Service: retrieves the service bindings (GetBindings) and opens or closes an authenticated session (Login, Logout, GetSessionInformation)....

Esker on Demand Submission Service

Manages documents and submits them to Esker on Demand for processing and delivery (fax, mail, email and other transports). SOAP 1.1 service (urn:SubmissionService2); the docs re...

Esker on Demand Query Service

Queries and manages documents already submitted to Esker on Demand: query transports, attachments and statistics, download files, approve, cancel and resubmit. SOAP 1.1 service ...

Pricing Plans 1

Published pricing tiers and plan structures.

Esker Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Esker Rate Limits

0 limits

RATE LIMITS

Security Posture 3

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

Esker Authentication

1 scheme

SECURITY

Esker Domain Security

TLSv1.3 · DMARC

SECURITY

Esker Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Esker Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Lifecycle

Lifecycle

Conformance

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

Access & Security 5

Authentication, authorization, and security posture

Compliance

Authentication

TrustCenter

DomainSecurity

Security

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 3

Status, limits, changes, and where to get help

Deprecation

Deprecation

Support

Support

HelpCenter

HelpCenter

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 4

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

LinkedIn

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Source (apis.yml)

aid: esker
name: Esker
description: Esker is a software company that automates document-driven business processes for the Office of the CFO, with
  cloud solutions spanning Source-to-Pay (accounts payable, procurement) and Order-to-Cash (order management, credit, collections,
  e-invoicing), plus document delivery, fax (VSI-Fax) and terminal emulation products. Its site describes them as document
  automation and order management software that helps businesses cut costs and increase efficiencies. Developers integrate
  through the Esker on Demand Web Services API (SOAP/WSDL session, submission and query services), documented at doc.esker.com.
url: https://raw.githubusercontent.com/api-evangelist/esker/refs/heads/main/apis.yml
x-type: company
x-source: harvest:kin-score-markets
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-18 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-18'
modified: '2026-10-18'
tags:
- Company
- Accounts Payable
- Order-to-Cash
- Source-to-Pay
- Document Automation
- E-Invoicing
- Procurement
- SOAP
tags_raw:
- Company
- Accounts Payable
- Order to Cash
- Source to Pay
- Document Automation
- E-Invoicing
- Procurement
- SOAP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://www.esker.com/sites/default/files/screenshot_home_us.jpg
common:
- type: Conventions
  url: conventions/esker-conventions.yml
- type: Compliance
  url: https://www.esker.com/capabilities/security-certifications/
- type: Authentication
  url: authentication/esker-authentication.yml
- type: Deprecation
  url: lifecycle/esker-lifecycle.yml
- type: Lifecycle
  url: lifecycle/esker-lifecycle.yml
- type: Conformance
  url: conformance/esker-conformance.yml
- type: LLMsTxt
  url: llms/esker-llms.txt
- type: WellKnown
  url: well-known/esker-well-known.yml
- type: Hosts
  url: hosts/esker-hosts.yml
- type: Vendors
  url: vendors/esker-vendors.yml
- type: SDKs
  url: packages/esker-packages.yml
- type: Packages
  url: packages/esker-packages.yml
- type: Newsroom
  url: https://www.esker.com/company/press
- type: Leadership
  url: https://www.esker.com/company/leadership/
- type: TrustCenter
  url: security/esker-trust-center.yml
- type: DomainSecurity
  url: security/esker-domain-security.yml
- type: Website
  url: https://www.esker.com/
- type: Documentation
  url: https://doc.esker.com/index.asp
- type: APIReference
  url: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/Introduction_v2.html
- type: Blog
  url: https://www.esker.com/blog/
- type: Support
  url: https://www.esker.com/customer-enablement/support/
- type: HelpCenter
  url: https://esker.my.site.com/
- type: Security
  url: https://www.esker.com/capabilities/security-certifications/
- type: TermsOfService
  url: https://www.esker.com/terms-use/
- type: PrivacyPolicy
  url: https://www.esker.com/privacy-policy/
- type: LinkedIn
  url: https://www.linkedin.com/company/esker/
- type: YouTube
  url: https://www.youtube.com/c/eskersa
apis:
- aid: esker:esker-on-demand-session-service
  name: Esker on Demand Session Service
  description: 'Entry point of the Esker on Demand Web Service: retrieves the service bindings (GetBindings) and opens or
    closes an authenticated session (Login, Logout, GetSessionInformation). SOAP 1.1 service (urn:SessionService2); the docs
    require calling SessionService.GetBindings first because the returned URLs may redirect to another server.'
  humanURL: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/References/API/sessionservice.html
  baseURL: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=Default2
  tags:
  - SOAP
  - Web Services
  properties:
  - type: WSDL
    url: wsdl/esker-session-service.wsdl
  - type: WSDL
    name: WSDL (provider-hosted)
    url: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=GenSession2WSDL
  - type: Documentation
    url: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/Introduction_v2.html
- aid: esker:esker-on-demand-submission-service
  name: Esker on Demand Submission Service
  description: Manages documents and submits them to Esker on Demand for processing and delivery (fax, mail, email and other
    transports). SOAP 1.1 service (urn:SubmissionService2); the docs require calling SessionService.GetBindings first because
    the returned URLs may redirect to another server.
  humanURL: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/References/API/submissionservice.html
  baseURL: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=Submission2Handler
  tags:
  - SOAP
  - Web Services
  properties:
  - type: WSDL
    url: wsdl/esker-submission-service.wsdl
  - type: WSDL
    name: WSDL (provider-hosted)
    url: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=GenSubmission2WSDL
  - type: Documentation
    url: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/Introduction_v2.html
- aid: esker:esker-on-demand-query-service
  name: Esker on Demand Query Service
  description: 'Queries and manages documents already submitted to Esker on Demand: query transports, attachments and statistics,
    download files, approve, cancel and resubmit. SOAP 1.1 service (urn:QueryService2); the docs require calling SessionService.GetBindings
    first because the returned URLs may redirect to another server.'
  humanURL: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/References/API/QueryService_v2.html
  baseURL: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=Query2Handler
  tags:
  - SOAP
  - Web Services
  properties:
  - type: WSDL
    url: wsdl/esker-query-service.wsdl
  - type: WSDL
    name: WSDL (provider-hosted)
    url: https://as1.ondemand.esker.com/EDPWS/EDPWS.dll?Handler=GenQuery2WSDL
  - type: Documentation
    url: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/Introduction_v2.html
x-coverage:
  state: covered
  reason: identity-verified
  detail: Bare esker.com did not answer (preflight URLError, curl 000); https://www.esker.com/ serves the Esker site and is
    the Website. github.com/esker is an unrelated personal account and was not recorded.
  evidence:
  - url: https://esker.com
    status: 0
  - url: https://www.esker.com/
    status: 200
  - url: https://doc.esker.com/index.asp
    status: 200
  - url: https://doc.esker.com/eskerondemand/cv_ly/en/webservices/Content/Introduction_v2.html
    status: 200
  - url: https://www.esker.com/blog/
    status: 200
  - url: https://www.esker.com/customer-enablement/support/
    status: 200
  - url: https://esker.my.site.com/
    status: 200
  - url: https://www.esker.com/capabilities/security-certifications/
    status: 200
  - url: https://www.esker.com/terms-use/
    status: 200
  - url: https://www.esker.com/privacy-policy/
    status: 200
  - url: https://www.linkedin.com/company/esker/
    status: 200
x-enrichment:
  date: '2026-10-18'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=deepseek,regulatory=anthropic

Esker API — frequently asked questions

Does Esker have an API?

Yes. APIs.io lists 3 APIs from Esker, including Esker on Demand Session Service, Esker on Demand Submission Service and Esker on Demand Query Service.

How do I authenticate with the Esker API?

Esker documents its authentication (1 scheme). The details are profiled on APIs.io as Esker Authentication.

Is the Esker API ready for AI agents?

Esker has a Kin Score of 31.6 out of 100 (thin) and an Agent Readiness score of 20.5 (agent-aware), scored by API Evangelist on 2026-10-31.

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